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Sibudjing Kawi - One of the best experts on this subject based on the ideXlab platform.
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coupling co2 separation with catalytic reverse water gas shift reaction via ceramic carbonate dual phase Membrane Reactor
Chemical Engineering Journal, 2020Co-Authors: Tianjia Chen, Zhigang Wang, Lina Liu, Subhasis Pati, Ming Hui Wai, Sibudjing KawiAbstract:Abstract Coupling of CO 2 separation and CO 2 utilization in Membrane Reactor is an ideal way to solve CO 2 emission problem. In this study, we report an effective catalytic reverse water-gas shift (RWGS) process to produce CO with simultaneous CO 2 capture from CO 2 -containing gas mixture using a ceramic-carbonate dual-phase Membrane in a single Reactor. The dual-phase Membrane is comprised of a ceramic phase of oxygen-ion conductor and molten carbonate phase. The catalytic bed contains a LaNiO 3 (LNO) or La 0.9 Ce 0.1 NiO 3-δ (LCNO) catalyst. The RWGS reaction process can be catalytically activated by a single Membrane without additional catalyst. CO 2 permeation flux of the separation process and CO 2 conversion of the RWGS reaction display significant increase after packing with catalysts in the Membrane Reactor. The results show that the Reactor with LCNO catalyst generally precedes the LNO counterpart in CO 2 conversion rate and the CO production yield. The Membrane Reactor yields a CO 2 flux of 4.25 ml min −1 cm −2 , which is around 4 times higher than that of the single Membrane separation with pure He sweep gas. A CO 2 conversion of 56.8% and a CO production rate of 2.41 ml min −1 cm −2 can be obtained at 750 °C using the Membrane Reactor with LCNO catalyst. Long-term stability test shows no obvious sign of degradation within 70 h. Overall, this work presents the technical exploration of a combined CO 2 capture and conversion Membrane-Reactor for RWGS reaction process.
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highly efficient no decomposition via dual functional catalytic perovskite hollow fiber Membrane Reactor coupled with partial oxidation of methane at medium low temperature
Environmental Science & Technology, 2019Co-Authors: Zhigang Wang, Yifan Cui, Tianjia Chen, Sibudjing KawiAbstract:A novel dual-functional catalytic perovskite hollow fiber Membrane Reactor was fabricated by integrating BaBi0.05Co0.8Nb0.15O3-δ (BBCN) perovskite hollow fiber Membrane with Ni-phyllosilicate hollow sphere catalysts for simultaneous NO decomposition and partial oxidation of methane (POM) reaction. With this novel catalytic Membrane Reactor, NO could be completely converted to N2 at a medium-low temperature (675 °C) owing to instantaneous oxygen removal from the NO decomposition reaction system. Coupled POM reaction on the other side of BBCN hollow fiber Membrane not only increased the driving force for oxygen permeation but also produced valuable products (syngas). This novel Membrane Reactor showed high NO removal capacity at comparatively low temperatures (675-700 °C), which is 100-200 °C lower than those of other Membrane Reactors reported in literature. In addition, even with the presence of a 2-5% oxygen concentration in NO stream, NO could still be completely decomposed to N2 via this catalytic BBCN Membrane Reactor. Evidently, the application of this novel catalytic Membrane Reactor could overcome the inhibition of oxygen present atmosphere for NO decomposition and achieve a remarkably high efficiency for NO removal.
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high performance catalytic perovskite hollow fiber Membrane Reactor for oxidative propane dehydrogenation
Journal of Membrane Science, 2019Co-Authors: Zhigang Wang, Zhoufeng Bian, Nikita Dewangan, Sibudjing KawiAbstract:Abstract A novel hollow fiber catalytic Membrane Reactor for oxidative propane dehydrogenation (OPDH) was fabricated by integrating BaBi0.05Co0.8Nb0.15O3-δ (BBCN) perovskite hollow fiber Membrane with silica-supported isolated Co2+ catalyst. Two other modes of propane dehydrogenation (PDH) were studied for comparison, non-oxidative dehydrogenation (NPDH), and conventional OPDH reaction via co-feed method. The results showed excellent performance of the catalytic Membrane Reactor, with C3H6 yield of ~ 50% and C3H6 selectivity of ~ 74% obtained at 650 °C over a 50-h long-term stability test, which are significantly higher than values obtained in the other two conventional reaction modes. Currently, this BBCN catalytic Membrane Reactor showed the highest C3H6 yield and best long-term stability as compared to other perovskite Membrane Reactors reported in literature. Propane feeding rate should be adjusted to match the oxygen permeation through the Membrane thus maintaining the optimum ratio between propane to oxygen; excess oxygen permeation leads to combustion of propylene product and loss of propylene selectivity, while low oxygen permeation leads to low propane conversion. High temperature favors oxygen permeation through perovskite Membranes but also increases the probability of cracking reaction. Therefore, if there is enough oxygen permeation through the Membrane, it is preferred to operate this reaction at a lower temperature to increase the selectivity of propylene.
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catalytic pd0 77ag0 23 alloy Membrane Reactor for high temperature water gas shift reaction methane suppression
Chemical Engineering Journal, 2019Co-Authors: Subhasis Pati, Zhigang Wang, Nikita Dewangan, Ming Hui Wai, Ashok Jangam, Sibudjing KawiAbstract:Abstract A catalytic Membrane Reactor was constructed using inner coated Pd0.77Ag0.23 (mass fraction) alloy Membrane on Al2O3 hollow fiber substrate, prepared by electroless plating method and packed with Ni-Phyllosilicate catalyst for high temperature water gas shift (WGS) reaction. The performance of the ultra-thin ∼1 µm Membrane was evaluated in a temperature range of 300–500 °C and hydrogen partial pressure of 50–200 kPa. The Membrane showed high hydrogen permeance of 5.11 × 10−4 mol.m−2 s−1 Pa−0.65 at 100 kPa pressure and 500 °C. WGS reaction was carried out using the Membrane Reactor at temperature range of 400–500 °C, the effect of pressure, steam to carbon ratio and GHSV on CO conversion and methane formation were evaluated. Results showed increase in H2 permeation with increase in temperature and pressure, which eventually helps surpass the thermodynamic equilibrium CO conversion at high temperatures. H2 recovery and CO conversion decreased with increase in GHSV from 2896 h−1 to 11008 h−1. In this study, the shifting of equilibrium conversion and suppressed methane formation is also demonstrated at a temperature range of 400–600 °C. WGS reaction was performed in a catalytic Membrane Reactor at 600 °C for 100 h and it was found to be stable in terms of CO conversion and H2 recovery for the entire range of investigation. Finally, the Membrane was tested for its performance using a reformate gas mixture similar to the gasification plant without any diluents and the conversion was found to be enhanced by 28% in terms of CO conversion at 500 °C using a Membrane Reactor.
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triple layer catalytic hollow fiber Membrane Reactor for hydrogen production
Journal of Membrane Science, 2016Co-Authors: Thawatchai Maneerung, K Hidajat, Sibudjing KawiAbstract:Abstract Triple-layer hollow fiber catalytic Membrane Reactor (T-HFCMR) consisting of: (1) Ni-based catalyst (outer) layer; (2) porous inorganic support (middle) layer; and (3) ultrathin Pd-based Membrane (inner) layer, has been successfully developed and used as a catalytic Membrane Reactor for hydrogen production. A 0.16 mol m −2 s −1 of H 2 gas can be produced from the T-HFCMR via catalytic decomposition of methane (as a model reaction) at 600 °C and 2 bar. Due to high H 2 permeability of the ultrathin (ca. 1.2 µm) Pd-based Membrane, up to 84% of the total H 2 produced (H 2 recovery) can be extracted from the reaction side. Moreover, a constant permeation of H 2 from the reaction side also remarkably increases the reaction conversion. Furthermore, mechanical damages (e.g. scratching) of Pd–Ag Membrane can also be prevented as the Membrane is not exposed directly to the external surface, making it more flexible for practical applications.
Naotsugu Itoh - One of the best experts on this subject based on the ideXlab platform.
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optimal design and operation of methane steam reforming in a porous ceramic Membrane Reactor for hydrogen production
Chemical Engineering Science, 2007Co-Authors: Takao Ohmori, Takuji Yamamoto, Akira Endo, Masaru Nakaiwa, Naotsugu ItohAbstract:Multi-objective optimization is performed for methane steam reforming in a porous ceramic Membrane Reactor using nitrogen and steam as sweep gases. The non-dominated sorting genetic algorithm (NSGA) is applied in solving the optimization problems. The Pareto optimal solutions have been obtained for the simultaneous maximization of the hydrogen production rate and the recovery yield, and for the simultaneous maximization of the hydrogen production rate and minimization of the sweep gas flow rate or the Membrane area. The comparisons of the Membrane Reactor performances for nitrogen and steam as sweep gases at optimal conditions illustrate that the use of steam as a sweep gas can produce more hydrogen at higher recovery yield, or produce more hydrogen using less sweep gas or Membrane area.
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simulation of a porous ceramic Membrane Reactor for hydrogen production
International Journal of Hydrogen Energy, 2005Co-Authors: Takao Ohmori, Takuji Yamamoto, Akira Endo, Masaru Nakaiwa, Naotsugu Itoh, T HayakawaAbstract:A systematic simulation study was performed to investigate the performance of a porous ceramic Membrane Reactor for hydrogen production by means of methane steam reforming. The results show that the methane conversions much higher than the corresponding equilibrium values can be achieved in the Membrane Reactor due to the selective removal of products from the reaction zone. The comparison of isothermal and non-isothermal model predictions was made. It was found that the isothermal assumption overestimates the Reactor performance and the deviation of calculation results between the two models is subject to the operating conditions. The effects of various process parameters such as the reaction temperature, the reaction side pressure, the feed flow rate and the steam to methane molar feed ratio as well as the sweep gas flow rate and the operation modes, on the behavior of Membrane Reactor were analyzed and discussed.
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an adiabatic type of palladium Membrane Reactor for coupling endothermic and exothermic reactions
Journal of Membrane Science, 1997Co-Authors: Naotsugu ItohAbstract:Abstract Palladium can play an interesting role as a catalytic Membrane, that is, a hydrogen separative and catalytically active wall. Utilizing this function, a palladium Membrane Reactor capable of working under an adiabatic condition was designed in this study for coupling two conjugated reactions. On one side of the Membrane, dehydrogenation of cyclohexane as a model takes place in the catalyst-packed layer, and on the Membrane surface of the other side hydrogen permeated reacts in-situ with oxygen. In the adiabatic Membrane Reactor, a heat compensation between the endothermic dehydrogenation and the exothermic oxidation is expected to be realized. As a result, it became obvious experimentally that the generated heat due to the oxidation refluxed to the dehydrogenation side, heated up the catalyst layer and therefore enhanced the dehydrogenation. A simple mathematical model derived for analyzing the reaction process could simulate the practical Reactor performances well.
Zhigang Wang - One of the best experts on this subject based on the ideXlab platform.
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coupling co2 separation with catalytic reverse water gas shift reaction via ceramic carbonate dual phase Membrane Reactor
Chemical Engineering Journal, 2020Co-Authors: Tianjia Chen, Zhigang Wang, Lina Liu, Subhasis Pati, Ming Hui Wai, Sibudjing KawiAbstract:Abstract Coupling of CO 2 separation and CO 2 utilization in Membrane Reactor is an ideal way to solve CO 2 emission problem. In this study, we report an effective catalytic reverse water-gas shift (RWGS) process to produce CO with simultaneous CO 2 capture from CO 2 -containing gas mixture using a ceramic-carbonate dual-phase Membrane in a single Reactor. The dual-phase Membrane is comprised of a ceramic phase of oxygen-ion conductor and molten carbonate phase. The catalytic bed contains a LaNiO 3 (LNO) or La 0.9 Ce 0.1 NiO 3-δ (LCNO) catalyst. The RWGS reaction process can be catalytically activated by a single Membrane without additional catalyst. CO 2 permeation flux of the separation process and CO 2 conversion of the RWGS reaction display significant increase after packing with catalysts in the Membrane Reactor. The results show that the Reactor with LCNO catalyst generally precedes the LNO counterpart in CO 2 conversion rate and the CO production yield. The Membrane Reactor yields a CO 2 flux of 4.25 ml min −1 cm −2 , which is around 4 times higher than that of the single Membrane separation with pure He sweep gas. A CO 2 conversion of 56.8% and a CO production rate of 2.41 ml min −1 cm −2 can be obtained at 750 °C using the Membrane Reactor with LCNO catalyst. Long-term stability test shows no obvious sign of degradation within 70 h. Overall, this work presents the technical exploration of a combined CO 2 capture and conversion Membrane-Reactor for RWGS reaction process.
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highly efficient no decomposition via dual functional catalytic perovskite hollow fiber Membrane Reactor coupled with partial oxidation of methane at medium low temperature
Environmental Science & Technology, 2019Co-Authors: Zhigang Wang, Yifan Cui, Tianjia Chen, Sibudjing KawiAbstract:A novel dual-functional catalytic perovskite hollow fiber Membrane Reactor was fabricated by integrating BaBi0.05Co0.8Nb0.15O3-δ (BBCN) perovskite hollow fiber Membrane with Ni-phyllosilicate hollow sphere catalysts for simultaneous NO decomposition and partial oxidation of methane (POM) reaction. With this novel catalytic Membrane Reactor, NO could be completely converted to N2 at a medium-low temperature (675 °C) owing to instantaneous oxygen removal from the NO decomposition reaction system. Coupled POM reaction on the other side of BBCN hollow fiber Membrane not only increased the driving force for oxygen permeation but also produced valuable products (syngas). This novel Membrane Reactor showed high NO removal capacity at comparatively low temperatures (675-700 °C), which is 100-200 °C lower than those of other Membrane Reactors reported in literature. In addition, even with the presence of a 2-5% oxygen concentration in NO stream, NO could still be completely decomposed to N2 via this catalytic BBCN Membrane Reactor. Evidently, the application of this novel catalytic Membrane Reactor could overcome the inhibition of oxygen present atmosphere for NO decomposition and achieve a remarkably high efficiency for NO removal.
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high performance catalytic perovskite hollow fiber Membrane Reactor for oxidative propane dehydrogenation
Journal of Membrane Science, 2019Co-Authors: Zhigang Wang, Zhoufeng Bian, Nikita Dewangan, Sibudjing KawiAbstract:Abstract A novel hollow fiber catalytic Membrane Reactor for oxidative propane dehydrogenation (OPDH) was fabricated by integrating BaBi0.05Co0.8Nb0.15O3-δ (BBCN) perovskite hollow fiber Membrane with silica-supported isolated Co2+ catalyst. Two other modes of propane dehydrogenation (PDH) were studied for comparison, non-oxidative dehydrogenation (NPDH), and conventional OPDH reaction via co-feed method. The results showed excellent performance of the catalytic Membrane Reactor, with C3H6 yield of ~ 50% and C3H6 selectivity of ~ 74% obtained at 650 °C over a 50-h long-term stability test, which are significantly higher than values obtained in the other two conventional reaction modes. Currently, this BBCN catalytic Membrane Reactor showed the highest C3H6 yield and best long-term stability as compared to other perovskite Membrane Reactors reported in literature. Propane feeding rate should be adjusted to match the oxygen permeation through the Membrane thus maintaining the optimum ratio between propane to oxygen; excess oxygen permeation leads to combustion of propylene product and loss of propylene selectivity, while low oxygen permeation leads to low propane conversion. High temperature favors oxygen permeation through perovskite Membranes but also increases the probability of cracking reaction. Therefore, if there is enough oxygen permeation through the Membrane, it is preferred to operate this reaction at a lower temperature to increase the selectivity of propylene.
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catalytic pd0 77ag0 23 alloy Membrane Reactor for high temperature water gas shift reaction methane suppression
Chemical Engineering Journal, 2019Co-Authors: Subhasis Pati, Zhigang Wang, Nikita Dewangan, Ming Hui Wai, Ashok Jangam, Sibudjing KawiAbstract:Abstract A catalytic Membrane Reactor was constructed using inner coated Pd0.77Ag0.23 (mass fraction) alloy Membrane on Al2O3 hollow fiber substrate, prepared by electroless plating method and packed with Ni-Phyllosilicate catalyst for high temperature water gas shift (WGS) reaction. The performance of the ultra-thin ∼1 µm Membrane was evaluated in a temperature range of 300–500 °C and hydrogen partial pressure of 50–200 kPa. The Membrane showed high hydrogen permeance of 5.11 × 10−4 mol.m−2 s−1 Pa−0.65 at 100 kPa pressure and 500 °C. WGS reaction was carried out using the Membrane Reactor at temperature range of 400–500 °C, the effect of pressure, steam to carbon ratio and GHSV on CO conversion and methane formation were evaluated. Results showed increase in H2 permeation with increase in temperature and pressure, which eventually helps surpass the thermodynamic equilibrium CO conversion at high temperatures. H2 recovery and CO conversion decreased with increase in GHSV from 2896 h−1 to 11008 h−1. In this study, the shifting of equilibrium conversion and suppressed methane formation is also demonstrated at a temperature range of 400–600 °C. WGS reaction was performed in a catalytic Membrane Reactor at 600 °C for 100 h and it was found to be stable in terms of CO conversion and H2 recovery for the entire range of investigation. Finally, the Membrane was tested for its performance using a reformate gas mixture similar to the gasification plant without any diluents and the conversion was found to be enhanced by 28% in terms of CO conversion at 500 °C using a Membrane Reactor.
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oxidative steam reforming of biomass tar model compound via catalytic babi0 05co0 8nb0 15o3 δ hollow fiber Membrane Reactor
Journal of Membrane Science, 2016Co-Authors: Zhigang Wang, Usman Oemar, Ming Li Ang, Sibudjing KawiAbstract:Abstract Ceramic BaBi 0.05 Co 0.8 Nb 0.15 O 3− δ (BBCN) perovskite hollow fiber Membrane was successfully integrated with Ni based perovskite structure catalyst La 0.8 Sr 0.2 Ni 0.8 Fe 0.2 O 3− δ (LSNF) to form a catalytic hollow fiber Membrane Reactor for oxidative steam reforming of toluene reaction. The results show that this Membrane Reactor achieves commendable performance. In detail, at low steam to carbon ratio (S/C=1), toluene conversion in various temperature 650–750 °C increased compared with catalyst only in typical steam reforming of toluene reaction. The enhancement is more obvious at higher temperature. In addition, this Membrane Reactor also shows high selectivity, obtaining H 2 and CO as dominant products with H 2 /CO ratio of 2–3. Stability test was carried out at 700 °C for 50 h, and further characterized by TGA, SEM/EDX, XRD, XPS, TPO/TPR and FTIR techniques. The results show that Membrane Reactor has a good stability with around 60% conversion and lower carbon deposition. After stability test, BBCN hollow fiber Membrane still maintained the perovskite phase structure, whereas the morphology and element state did not change too much. Hence, catalytic BBCN hollow fiber Membrane Reactor for oxidative steam reforming of tar displays great potential for future application.
Weishen Yang - One of the best experts on this subject based on the ideXlab platform.
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asymmetric dual phase miec Membrane Reactor for energy efficient coproduction of two kinds of synthesis gases
International Journal of Hydrogen Energy, 2019Co-Authors: Hongbo Li, Wenping Li, Weishen YangAbstract:Abstract An asymmetric 75 wt% Sm0.15Ce0.85O1.925-25 wt% Sm0.6Sr0.4Al0.3Fe0.7O3-δ (SDC-SSAF) dual-phase mixed ionic-electronic conducting (MIEC) oxygen-permeable Membrane Reactor was applied to coproduce ammonia synthesis gas (ASG, H2/N2 = 3) and liquid fuels synthesis gas (LFSG, H2/CO = 2). The effects of CH4 concentration, CH4 flow rate, steam flow rate and temperature on the performance of the Membrane Reactor were studied. The SDC-SSAF Membrane Reactor showed an excellent performance for the coproduction of ASG and LFSG. An ASG production rate of 20.7 mL cm−2 min−1, a LFSG production rate of 51.0 mL cm−2 min−1 and an oxygen permeation rate of 9.1 mL cm−2 min−1 were achieved at 925 °C. Compared with traditional industrial processes, the energy saving of this Membrane Reactor process is expected as high as 66.5%. The post-mortem of the Membrane Reactor using scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) characterization revealed that the Membrane has an excellent structural stability under operation condition.
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integration of nine steps into one Membrane Reactor to produce synthesis gases for ammonia and liquid fuel
Angewandte Chemie, 2016Co-Authors: Xuefeng Zhu, Shuguang Chen, Weishen YangAbstract:The synthesis of ammonia and liquid fuel are two important chemical processes in which most of the energy is consumed in the production of H2/N2 and H2/CO synthesis gases from natural gas (methane). Here, we report a Membrane Reactor with a mixed ionic-electronic conducting Membrane, in which the nine steps for the production of the two types of synthesis gases are shortened to one step by using water, air, and methane as feeds. In the Membrane Reactor, there is no direct CO2 emission and no CO or H2S present in the ammonia synthesis gas. The energy consumption for the production of the two synthesis gases can be reduced by 63 % by using this Membrane Reactor. This promising Membrane Reactor process has been successfully demonstrated by experiment.
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water gas shift reaction in a pd ceramic hollow fiber composite Membrane Reactor
Chinese Journal of Catalysis, 2005Co-Authors: W P Wang, Guoxing Xiong, Xiulian Pan, Xiaoliang Zhang, Weishen YangAbstract:The water-gas shift reaction was carried out in a Pd/ceramic hollow fiber Membrane Reactor using a commercial iron-based catalyst with additive chromium. The composite Membrane was prepared by the improved electroless plating method. The hydrogen permeability of the composite Membrane was 0.165 m(3)/(m(2)-h-kPa) at 673 K, and the separation factor of pure hydrogen to argon was about 100. The influences of the H2O/CO molar ratio, reaction temperature and feed pressure on CO conversion were studied in detail. Under the same conditions, the CO conversion in the Membrane Reactor cannot only exceed that in the fixed-bed Reactor but also exceed the thermodynamic equilibrium conversion owing to the selective removal of hydrogen from the reaction system by the composite Membrane. These results demonstrate that it is possible to apply the Pd/gamma-Al2O3 capillary Membranes to the water-gas shift reaction.
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investigation on the partial oxidation of methane to syngas in a tubular ba0 5sr0 5co0 8fe0 2o3 δ Membrane Reactor
Catalysis Today, 2003Co-Authors: Haihui Wang, You Cong, Weishen YangAbstract:Abstract A perovskite material of Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF), with both electronic and ionic conductivity, was synthesized by a combined citrate–EDTA complexing method. The dense Membrane tube made of BSCF was fabricated using the plastic extrusion method. The partial oxidation of methane (POM) to syngas was performed in the tubular BSCF Membrane Reactor packed with a LiLaNiO/γ–Al2O3 catalyst. The reaction performance of the Membrane Reactor was investigated as functions of temperature, air flow rate in the shell side and methane concentration in the tube side. The mechanism of POM in the Membrane Reactor was discussed in detail. It was found that in the tubular Membrane Reactor, combustion reaction of methane with permeated oxygen took place in the reaction zone close to the surface of the Membrane, then followed by steam and CO2 reforming of methane in the middle zone of the tube side. The Membrane tube can be operated steadily for 500 h in pure methane with 94% methane conversion and higher than 95% CO selectivity, and higher than 8.0 ml/cm2 min oxygen permeation flux.
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performance of a mixed conducting ceramic Membrane Reactor with high oxygen permeability for methane conversion
Journal of Membrane Science, 2001Co-Authors: Zongping Shao, Hui Dong, Guoxing Xiong, You Cong, Weishen YangAbstract:A mixed-conducting perovskite-type Ba0:5Sr0:5Co0:8Fe0:2O3 (BSCFO) ceramic Membrane Reactor with high oxygen permeability was applied for the activation of methane. The Membrane Reactor has intrinsic catalytic activities for methane conversion to ethane and ethylene. C2 selectivity up to 40‐70% was achieved, albeit that conversion rate were low, typically 0.5‐3.5% at 800‐900C with a 50% helium diluted methane inlet stream at a flow rate of 34 ml/min. Large amount of unreacted molecular oxygen was detected in the eluted gas and the oxygen permeation flux improved only slightly compared with that under non-reactive air/He experiments. The partial oxidation of methane to syngas in a BSCFO Membrane Reactor was also performed by packing LiLaNiO/g-Al2O3 with 10% Ni loading as the catalyst. At the initial stage, oxygen permeation flux, methane conversion and CO selectivity were closely related with the state of the catalyst. Less than 21 h was needed for the oxygen permeation flux to reach its steady state. 98.5% CH 4 conversion, 93.0% CO selectivity and 10.45 ml/cm 2 min oxygen permeation flux were achieved under steady state at 850 C. Methane conversion and oxygen permeation flux increased with increasing temperature. No fracture of the Membrane Reactor was observed during syngas production. However, H2-TPR investigation demonstrated that the BSCFO was unstable under reducing atmosphere, yet the material was found to have excellent phase reversibility. A Membrane Reactor made from BSCFO was successfully operated for the POM reaction at 875C for more than 500 h without failure, with a stable oxygen permeation flux of about 11.5 ml/cm 2 min. © 2001 Elsevier
A Basile - One of the best experts on this subject based on the ideXlab platform.
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methanol steam reforming reaction in a pd ag Membrane Reactor for co free hydrogen production
International Journal of Hydrogen Energy, 2008Co-Authors: Adolfo Iulianelli, T Longo, A BasileAbstract:Abstract A dense tubular Pd–Ag Membrane Reactor was used to carry out the methanol steam reforming reaction for producing a CO-free hydrogen stream. A Cu/Zn/Mg-based catalyst was packed in the lumen side of the Membrane Reactor and the experimental tests were performed at a reaction temperature of 300 °C and at a H 2 O/methanol feed molar ratio of 3/1. The effects of the different flow configurations, as well as the sweep factor and the reaction pressure were analysed. Experimental results in terms of CO-free hydrogen recovery, hydrogen yield, CO-free hydrogen yield and hydrogen selectivity are presented. Moreover, a comparison between the performances of the Membrane Reactor and a traditional Reactor working at the same operative conditions is proposed and discussed.
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pd ag Membrane Reactor for steam reforming reactions a comparison between different fuels
International Journal of Hydrogen Energy, 2008Co-Authors: Fausto Gallucci, A BasileAbstract:The simulation of a dense Pd-based Membrane Reactor for carrying out the methane, the methanol and the ethanol steam reforming (SR) reactions for pure hydrogen production is performed. The same simulation is also performed in a traditional Reactor. This modelling work shows that the use of Membrane Reactor is effective for carrying out the methane SR reaction, giving in the best conditions a conversion increase of 800% with respect to a traditional system, and can be really useful for carrying out the methanol SR reaction (25% conversion increase). Vice versa, the use of the Membrane Reactor in the ethanol SR reaction is still affected by the low catalytic activity. However, also for the ethanol SR reaction system, the use of the Membrane Reactor gives an increase of the ethanol conversion (30%) and a relatively high increase of the hydrogen yield. & 2008 International Association for Hydrogen Energy
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catalytic ceramic Membrane Reactor design for hydrogen separation from inert gas via oxidation
Journal of Membrane Science, 1995Co-Authors: V Violante, Enrico Drioli, A BasileAbstract:A theoretical and experimental work concerning a catalytic ceramic Membrane Reactor is described in this paper. A tubular catalytic ceramic Membrane Reactor prototype has been developed to separate hydrogen at low concentration from an inert gas stream via oxidation. A mathematical model has also been carried out either to analyze the experimental results or to develop the Reactor optimization. The experimental results are in agreement with the theoretical previsions. The optimization study shows that it is possible to reach very high conversion values. Such preliminary work points out the role of either the materials technology or the Membrane catalytic coating.