The Experts below are selected from a list of 276 Experts worldwide ranked by ideXlab platform
Jyh-myng Zen - One of the best experts on this subject based on the ideXlab platform.
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A rugged lead-ruthenate pyrochlore Membrane Catalyst for highly selective oxidation of alcohols
Journal of Molecular Catalysis A-chemical, 2006Co-Authors: Shanmuganathan Venkatesan, Annamalai Senthil Kumar, Jyh-myng ZenAbstract:A rugged lead-ruthenate pyrochlore (Py, Pb2Ru2O7) Nafion 417 Membrane Catalyst (|NPy|) has been demonstrated for highly efficient and fully selective oxidation of primary and secondary alcohols to aldehydes and ketones. Under a triphasic condition of CH2Cl2(org)//|NPy|(s)//NaOCl-pH 11(aq), the |NPy| can be recycled and reused effectively on oxidations of alcohols. Using a same piece of |NPy|, similar reaction yields were obtained by repeating benzyl alcohol oxidation reaction for 20 times. Electrochemical mechanistic investigation indicated that the perruthenate ion (RuO4−) intermediate was responsible for selective mediation of the alcohol oxidation.
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A rugged lead-ruthenate pyrochlore Membrane Catalyst for highly selective oxidation of alcohols
Journal of Molecular Catalysis A: Chemical, 2006Co-Authors: Shanmuganathan Venkatesan, Annamalai Senthil Kumar, Jyh-myng ZenAbstract:A rugged lead-ruthenate pyrochlore (Py, Pb2Ru2O7) Nafion 417 Membrane Catalyst (vertical bar NPy vertical bar) has been demonstrated for highly efficient and fully selective oxidation of primary and secondary alcohols to aldehydes and ketones. Under a triphasic condition of CH2Cl2(org)//vertical bar NPy vertical bar((s))//NaOCl-pH 11((aq)), the vertical bar NPy vertical bar can be recycled and reused effectively on oxidations of alcohols. Using a same piece of vertical bar NPy vertical bar, similar reaction yields were obtained by repeating benzyl alcohol oxidation reaction for 20 times. Electrochemical mechanistic investigation indicated that the perruthenate ion (RuO4-) intermediate was responsible for selective mediation of the alcohol oxidation. (c) 2006 Elsevier B.V. All rights reserved
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Catalysis and characterization of a rugged lead ruthenate pyrochlore Membrane Catalyst
Journal of Molecular Catalysis A-chemical, 2005Co-Authors: Annamalai Senthil Kumar, Jun-wei Sue, Shanmuganathan Venkatesan, Jyh-myng ZenAbstract:Abstract A rugged lead ruthenate pyrochlore (Py, Pb2Ru2O6O′) Nafion® 417 Membrane Catalyst (|NPy|) has been prepared by an in situ precipitation method and characterized by physico-chemical techniques. The Nafion® 417 Membrane enhanced the Py crystallization to form a stable and continuous agglomerate-like structure in the |NPy| network. The cationic exchange characteristics of Nafion® 417 Membrane was not fully suppressed after Py modification. Catalytic performance was demonstrated for the one pot and selective oxidation of benzyl alcohol to benzaldehyde via a perruthenate (RuO4−) intermediate with 30% H2O2 (as a sacrificial co-oxidant) in a triphasic condition (i.e. CH2Cl2/NPy/H2O2). Four repeated experiments with the |NPy| entailed a weight loss of ∼0.07% with virtually the same catalytic performance. With these inherent features, this Membrane Catalyst is useful in diverse research fields including organic synthesis, fuel cells, charge storage systems, etc.
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Catalysis and characterization of a rugged lead ruthenate pyrochlore Membrane Catalyst
Journal of Molecular Catalysis A: Chemical, 2005Co-Authors: Annamalai Senthil Kumar, Jun-wei Sue, Shanmuganathan Venkatesan, Jyh-myng ZenAbstract:A rugged lead ruthenate pyrochlore (Py, Pb2Ru2O6O') Nafion (R) 417 Membrane Catalyst (vertical bar NPy vertical bar) has been prepared by an in situ precipitation method and characterized by physico-chemical techniques. The Nafion((R)) 417 Membrane enhanced the Py crystallization to form a stable and continuous agglomerate-like structure in the NPyj network. The cationic exchange characteristics of Nafion((R)) 417 Membrane was not fully suppressed after Py modification. Catalytic performance was demonstrated for the one pot and selective oxidation of benzyl alcohol to benzaldehyde via a perruthenate (RuO4-) intermediate with 30% H2O2 (as a sacrificial co-oxidant) in a triphasic condition (i.e. CH2Cl2/NPy/H2O2). Four repeated experiments with the vertical bar NPy vertical bar entailed a weight loss of similar to 0.07% with virtually the same catalytic performance. With these inherent features, this Membrane Catalyst is useful in diverse research fields including organic synthesis, fuel cells, charge storage systems, etc. (c) 2005 Elsevier B.V. All rights reserved
Ying Yan - One of the best experts on this subject based on the ideXlab platform.
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Continuous removal of Cr(VI) and Orange II over a novel Fe0-NaA zeolite Membrane Catalyst
Separation and Purification Technology, 2019Co-Authors: Jian Liu, Huiping Zhang, Quan Yin, Ying YanAbstract:Abstract A novel Fe0-NaA zeolite Membrane Catalyst was prepared for continuous removal of Cr(VI) and Orange II (OII) in a fixed bed reactor. Firstly, the NaA zeolite Membrane on the paper-like sintered stainless steel fibers support was prepared by wet lay-up papermaking technique and secondary growth method. Then, Fe0-NaA zeolite Membrane Catalyst was synthesized by traditional liquid-phase technique and characterized by using scanning electron microscopy (SEM) and X-ray diffraction (XRD). Finally, catalytic activity of Fe0-NaA zeolite Membrane Catalysts was studied by investigating the breakthrough time of Cr(VI) and conversion of OII as well as the iron leaching concentration in the effluent based on the reduction reaction and catalytic wet peroxide oxidation (CWPO) processes in a fixed bed reactor. The results showed that nanoscale Fe0 particles were uniformly loaded on the surface of the NaA zeolite Membrane. An acidic environment was more favorable to the reduction of Cr(VI) and the breakthrough time reached 300 min for 4.7% breakthrough at pH 2. Both Yoon-Nelson and Bed Depth Service Time (BDST) models were found to agree well with the experimental results of Cr(VI) removal. The Catalyst for CWPO of OII achieved the highest activity (OII conversion > 97%, COD removal ratio about 86.0%, respectively) after continuously ran for 240 min. Meanwhile, low iron leaching concentration (
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Catalytic combustion of isopropanol over Co-Mn mixed oxides modified ZSM-5 zeolite Membrane Catalysts coated on stainless steel fibers
Separation and Purification Technology, 2017Co-Authors: Ying Yan, Huiping Zhang, Ling Wang, Xinya ZhangAbstract:Abstract A novel gradient porous Co-Mn mixed oxides modified ZSM-5 zeolite Membrane/PSSF (paper-like stainless steel fibers) Catalyst was prepared for catalytic combustion of isopropanol in a Membrane reactor. First, the paper-like sintered stainless steel fibers (PSSF) support was fabricated by wet lay-up papermaking method and sintering process. Then, ZSM-5 zeolite Membranes were synthesized on the surface of stainless steel fibers by using secondary growth process. Finally, the cobalt and manganese mixed oxides modified ZSM-5 zeolite Membrane Catalysts were prepared by wet impregnation method. These novel modified Membrane Catalysts were characterized by using SEM, XRD, N2 adsorption–desorption isotherms and XPS, respectively. The catalytic activity test was carried out over a Membrane reactor filled with ZSM-5 zeolite Membrane Catalysts and granular Catalysts, respectively. The experimental results showed that the junctures of stainless steel fibers were completely sintered together to form a three-dimensional network structure and ZSM-5 zeolite Membrane was fabricated on the PSSF support with the thickness of 1.78 μm. The cobalt element existed as Co3+and Co2+, maganese element existed as Mn4+ and Mn3+. The results of catalytic activity tests showed that catalytic activity for isopropanol over ZSM-5 zeolite Membrane Catalyst was superior to that over granular ZMS-5 Catalyst, the reaction temperature of 50% and 90% conversion of isopropanol over ZSM-5 zeolite Membrane Catalyst dramatically decreased. The Co-Mn(1:4)/ZSM-5/PSSF Catalysts presented the most excellent catalytic activity for isopropanol combustion, compared with Co/ZSM-5/PSSF and Mn/ZSM-5/PSSF Catalysts, respectively.
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stability and deactivation of fe zsm 5 zeolite Catalyst for catalytic wet peroxide oxidation of phenol in a Membrane reactor
RSC Advances, 2015Co-Authors: Songshan Jiang, Huiping Zhang, Ying Yan, Xinya ZhangAbstract:Stability and deactivation of Fe-ZSM-5 zeolite Catalyst for catalytic wet peroxide oxidation (CWPO) of phenol were studied in a Membrane reactor. Firstly, the Fe-ZSM-5 zeolite Membrane Catalyst was prepared by a paper-making/sintering process, secondary growth process and incipient wetness impregnation method. And the influence of residence time on the CWPO of phenol was evaluated by modifying the Catalyst bed height. Then, stability of the Fe-ZSM-5 zeolite Membrane Catalyst was studied by the long-term experiment (40 hours). Finally, the deactivation mechanisms of the Fe-ZSM-5 zeolite Membrane Catalyst were investigated by N2 adsorption–desorption, X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), thermal gravimetric (TG) analysis, Fourier transform infrared (FT-IR) spectroscopy and Raman spectroscopy, respectively. The results of CWPO of phenol showed that complete phenol conversion with a high TOC conversion (about 60%) was obtained at the Catalyst bed height of 4 cm. Meanwhile, good stability with low Fe leaching concentration (about 0.5 mg L−1) and high phenol conversion (above 85%) were obtained after continuously running for 40 hours. Furthermore, the loss of active component, the partial phase change of Fe2O3, the crystallinity change of the ZSM-5 zeolite Membrane and the coke formation on the surface of the Catalyst were found to be responsible for the deactivation of the Catalyst.
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Catalytic wet peroxide oxidation of phenol wastewater over a novel Cu–ZSM-5 Membrane Catalyst
Catalysis Communications, 2015Co-Authors: Songshan Jiang, Huiping Zhang, Ying YanAbstract:A novel Cu–ZSM-5 Membrane Catalyst was prepared and characterized for catalytic wet peroxide oxidation (CWPO) of phenol wastewater in a continuous reactor. The Cu–ZSM-5 Membrane Catalyst was first prepared by the secondary growth process and incipient wetness impregnation method, and then characterized by thermal gravimetric (TG) analysis, N2 adsorption–desorption, X-ray diffraction (XRD), scanning electron microscopy (SEM) and H2-temperature programmed reduction (H2-TPR), respectively. This Catalyst exhibited an excellent catalytic performance (complete phenol conversion and TOC conversion about 65% without toxic quinones detected).
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Fabrication of porous copper/manganese binary oxides modified ZSM-5 Membrane Catalyst and potential application in the removal of VOCs
Chemical Engineering Journal, 2014Co-Authors: Huanhao Chen, Huiping Zhang, Ying YanAbstract:Abstract Copper-manganese binary oxides modified ZSM-5 Membrane Catalysts were synthesized by using incipient wetness impregnating method. Specifically, the PSSF (paper-like sintered stainless steel fibers) support was fabricated by wet lay-up papermaking/sintering process and the ZSM-5 Membranes were synthesized on the surface of stainless steel fibers by using secondary growth process. The Catalysts were characterized by using scanning electron microscopy (SEM), Energy dispersive X-ray spectrometer (EDS) mapping, X-ray diffraction (XRD), N 2 adsorption–desorption, X-ray photoelectron spectra (XPS) as well as H 2 -TPR (Temperature programmed reduction). The most efficient Catalyst was Cu–Mn(1:6)/ZSM-5/PSSF, exhibiting best catalytic activity (% of isopropanol conversion was 210 °C) and excellent reaction rate. It can be also demonstrated that the zeolite Membrane reactor performs better for isopropanol oxidation, giving a T 90% that is around 70 °C lower than obtained in the traditional particles fixed bed. The excellent catalytic performance of the Cu–Mn(1:6)/ZSM-5/PSSF Catalysts can be attributed to the presence of ZSM-5 zeolite Membrane, well dispersion of Catalysts actives, reasonable mass/heat transfer efficiency, excellent oxygen storage ability as well as higher contacting efficiency. Furthermore, the Cu–Mn(1:6)/ZSM-5/PSSF Catalyst exhibits a high stability after being used at 260 °C for 50 h.
Shanmuganathan Venkatesan - One of the best experts on this subject based on the ideXlab platform.
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A rugged lead-ruthenate pyrochlore Membrane Catalyst for highly selective oxidation of alcohols
Journal of Molecular Catalysis A-chemical, 2006Co-Authors: Shanmuganathan Venkatesan, Annamalai Senthil Kumar, Jyh-myng ZenAbstract:A rugged lead-ruthenate pyrochlore (Py, Pb2Ru2O7) Nafion 417 Membrane Catalyst (|NPy|) has been demonstrated for highly efficient and fully selective oxidation of primary and secondary alcohols to aldehydes and ketones. Under a triphasic condition of CH2Cl2(org)//|NPy|(s)//NaOCl-pH 11(aq), the |NPy| can be recycled and reused effectively on oxidations of alcohols. Using a same piece of |NPy|, similar reaction yields were obtained by repeating benzyl alcohol oxidation reaction for 20 times. Electrochemical mechanistic investigation indicated that the perruthenate ion (RuO4−) intermediate was responsible for selective mediation of the alcohol oxidation.
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A rugged lead-ruthenate pyrochlore Membrane Catalyst for highly selective oxidation of alcohols
Journal of Molecular Catalysis A: Chemical, 2006Co-Authors: Shanmuganathan Venkatesan, Annamalai Senthil Kumar, Jyh-myng ZenAbstract:A rugged lead-ruthenate pyrochlore (Py, Pb2Ru2O7) Nafion 417 Membrane Catalyst (vertical bar NPy vertical bar) has been demonstrated for highly efficient and fully selective oxidation of primary and secondary alcohols to aldehydes and ketones. Under a triphasic condition of CH2Cl2(org)//vertical bar NPy vertical bar((s))//NaOCl-pH 11((aq)), the vertical bar NPy vertical bar can be recycled and reused effectively on oxidations of alcohols. Using a same piece of vertical bar NPy vertical bar, similar reaction yields were obtained by repeating benzyl alcohol oxidation reaction for 20 times. Electrochemical mechanistic investigation indicated that the perruthenate ion (RuO4-) intermediate was responsible for selective mediation of the alcohol oxidation. (c) 2006 Elsevier B.V. All rights reserved
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Catalysis and characterization of a rugged lead ruthenate pyrochlore Membrane Catalyst
Journal of Molecular Catalysis A-chemical, 2005Co-Authors: Annamalai Senthil Kumar, Jun-wei Sue, Shanmuganathan Venkatesan, Jyh-myng ZenAbstract:Abstract A rugged lead ruthenate pyrochlore (Py, Pb2Ru2O6O′) Nafion® 417 Membrane Catalyst (|NPy|) has been prepared by an in situ precipitation method and characterized by physico-chemical techniques. The Nafion® 417 Membrane enhanced the Py crystallization to form a stable and continuous agglomerate-like structure in the |NPy| network. The cationic exchange characteristics of Nafion® 417 Membrane was not fully suppressed after Py modification. Catalytic performance was demonstrated for the one pot and selective oxidation of benzyl alcohol to benzaldehyde via a perruthenate (RuO4−) intermediate with 30% H2O2 (as a sacrificial co-oxidant) in a triphasic condition (i.e. CH2Cl2/NPy/H2O2). Four repeated experiments with the |NPy| entailed a weight loss of ∼0.07% with virtually the same catalytic performance. With these inherent features, this Membrane Catalyst is useful in diverse research fields including organic synthesis, fuel cells, charge storage systems, etc.
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Catalysis and characterization of a rugged lead ruthenate pyrochlore Membrane Catalyst
Journal of Molecular Catalysis A: Chemical, 2005Co-Authors: Annamalai Senthil Kumar, Jun-wei Sue, Shanmuganathan Venkatesan, Jyh-myng ZenAbstract:A rugged lead ruthenate pyrochlore (Py, Pb2Ru2O6O') Nafion (R) 417 Membrane Catalyst (vertical bar NPy vertical bar) has been prepared by an in situ precipitation method and characterized by physico-chemical techniques. The Nafion((R)) 417 Membrane enhanced the Py crystallization to form a stable and continuous agglomerate-like structure in the NPyj network. The cationic exchange characteristics of Nafion((R)) 417 Membrane was not fully suppressed after Py modification. Catalytic performance was demonstrated for the one pot and selective oxidation of benzyl alcohol to benzaldehyde via a perruthenate (RuO4-) intermediate with 30% H2O2 (as a sacrificial co-oxidant) in a triphasic condition (i.e. CH2Cl2/NPy/H2O2). Four repeated experiments with the vertical bar NPy vertical bar entailed a weight loss of similar to 0.07% with virtually the same catalytic performance. With these inherent features, this Membrane Catalyst is useful in diverse research fields including organic synthesis, fuel cells, charge storage systems, etc. (c) 2005 Elsevier B.V. All rights reserved
Annamalai Senthil Kumar - One of the best experts on this subject based on the ideXlab platform.
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A rugged lead-ruthenate pyrochlore Membrane Catalyst for highly selective oxidation of alcohols
Journal of Molecular Catalysis A-chemical, 2006Co-Authors: Shanmuganathan Venkatesan, Annamalai Senthil Kumar, Jyh-myng ZenAbstract:A rugged lead-ruthenate pyrochlore (Py, Pb2Ru2O7) Nafion 417 Membrane Catalyst (|NPy|) has been demonstrated for highly efficient and fully selective oxidation of primary and secondary alcohols to aldehydes and ketones. Under a triphasic condition of CH2Cl2(org)//|NPy|(s)//NaOCl-pH 11(aq), the |NPy| can be recycled and reused effectively on oxidations of alcohols. Using a same piece of |NPy|, similar reaction yields were obtained by repeating benzyl alcohol oxidation reaction for 20 times. Electrochemical mechanistic investigation indicated that the perruthenate ion (RuO4−) intermediate was responsible for selective mediation of the alcohol oxidation.
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Catalysis and characterization of a rugged lead ruthenate pyrochlore Membrane Catalyst
Journal of Molecular Catalysis A-chemical, 2005Co-Authors: Annamalai Senthil Kumar, Jun-wei Sue, Shanmuganathan Venkatesan, Jyh-myng ZenAbstract:Abstract A rugged lead ruthenate pyrochlore (Py, Pb2Ru2O6O′) Nafion® 417 Membrane Catalyst (|NPy|) has been prepared by an in situ precipitation method and characterized by physico-chemical techniques. The Nafion® 417 Membrane enhanced the Py crystallization to form a stable and continuous agglomerate-like structure in the |NPy| network. The cationic exchange characteristics of Nafion® 417 Membrane was not fully suppressed after Py modification. Catalytic performance was demonstrated for the one pot and selective oxidation of benzyl alcohol to benzaldehyde via a perruthenate (RuO4−) intermediate with 30% H2O2 (as a sacrificial co-oxidant) in a triphasic condition (i.e. CH2Cl2/NPy/H2O2). Four repeated experiments with the |NPy| entailed a weight loss of ∼0.07% with virtually the same catalytic performance. With these inherent features, this Membrane Catalyst is useful in diverse research fields including organic synthesis, fuel cells, charge storage systems, etc.
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Catalysis and characterization of a rugged lead ruthenate pyrochlore Membrane Catalyst
Journal of Molecular Catalysis A: Chemical, 2005Co-Authors: Annamalai Senthil Kumar, Jun-wei Sue, Shanmuganathan Venkatesan, Jyh-myng ZenAbstract:A rugged lead ruthenate pyrochlore (Py, Pb2Ru2O6O') Nafion (R) 417 Membrane Catalyst (vertical bar NPy vertical bar) has been prepared by an in situ precipitation method and characterized by physico-chemical techniques. The Nafion((R)) 417 Membrane enhanced the Py crystallization to form a stable and continuous agglomerate-like structure in the NPyj network. The cationic exchange characteristics of Nafion((R)) 417 Membrane was not fully suppressed after Py modification. Catalytic performance was demonstrated for the one pot and selective oxidation of benzyl alcohol to benzaldehyde via a perruthenate (RuO4-) intermediate with 30% H2O2 (as a sacrificial co-oxidant) in a triphasic condition (i.e. CH2Cl2/NPy/H2O2). Four repeated experiments with the vertical bar NPy vertical bar entailed a weight loss of similar to 0.07% with virtually the same catalytic performance. With these inherent features, this Membrane Catalyst is useful in diverse research fields including organic synthesis, fuel cells, charge storage systems, etc. (c) 2005 Elsevier B.V. All rights reserved
Gryaznov V.m. - One of the best experts on this subject based on the ideXlab platform.
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Dehydrogenation of isoamylenes using Membrane Catalysts
2020Co-Authors: Smirnov V.s., Gryaznov V.m., Liakumovich A.g., Savel'ev A.p., Bulgakov O.v., Zaitseva G.a., Mishchenko A.p., Orekhova N.v.Abstract:1. 1. Isoprene content in products of dehydrogenation of 3-methylbut-1-ene using a palladium alloy with 5·9% nickel under pulse conditions exceeds its content in products of dehydrogenation of 2-methylbut-1-ene and 2-methyl-but-2-ene. The reaction is of first order in terms of the initial material, apparent activation energy being 9 kcal/mole. 2. 2. Under optimum conditions dehydrogenation of isoamylenes, when the hydrogen is removed through a Membrane Catalyst, is also of first order in terms of the initial material. With an increase in the partial pressure of isoamylenes, the isoprene content of the products decreases and the efficiency of unit Catalyst surface increases to 10 g isoprene every 1 m2/hr. 3. 3. In a large all-metal reactor with a Membrane Catalyst of a palladium nickel alloy, isoprene content in products of dehydrogenation of isoamylenes reaches 54% per pass. © 1975
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Transformations of heterocyclic compounds on Membrane Catalysts - I. Hydrogenation of furan compounds on a pd-ni alloy
'Springer Science and Business Media LLC', 2020Co-Authors: Giller S.a., Gryaznov V.m., Pavlova L.f., Bulenkova L.f., Oshis Ya.f., Shimanskaya M.v.Abstract:The transformations of furan, α-methylfuran, furfural, and 2,3-dihydrofuran on a palladium - nickel Membrane Catalyst at 50-300°C under conditions of diffusion of hydrogen through the Catalyst were investigated. Under these conditions furan is hydrogenated to tetrahydrofuran in quantitative yield. Considerable amounts of furan, the hydrogenation of which in the presence of the above-named derivatives is inhibited, are detected in the catalyzate along with hydrogenation products in the transformations of α-methylfuran, furfural, and 2,3-dihydrofuran. © 1976 Plenum Publishing Corporation
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Hydrogenation of cyclopentadiene in the presence of isoprene and 1,3-pentadiene on a Pd-Ru Membrane Catalyst
'Springer Science and Business Media LLC', 2020Co-Authors: Gryaznov V.m., Orekhova N.v., Ermilova M.m., Gogua L.d., Morozova L.s.Abstract:1. The hydrogenation of cyclopentadiene, containing up to 25% of isoprene and 1.5% of 1,3-pentadiene, on a Membrane Catalyst composed of Pd alloy containing 9.8% Ru, proceeds at the same rate and selectivity in cyclopentene as does pure cyclopentadiene. 2. The relative adsorption coefficients of isoprene (0.6), 1,3-pentadiene (1.3), and cyclopentadiene (1) were determined. © 1981 Plenum Publishing Corporation
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Effect of hydrogen transfer through a Membrane Catalyst from a Pd-Ru alloy on the rate of dehydrogenation of isopropanol and hydrogenation of cyclopentadiene
'Elsevier BV', 2020Co-Authors: Mikhalenko N.n., Khrapova Ye.v., Gryaznov V.m.Abstract:1. 1. Hydrogen transfer to the zone of hydrogenation of cyclopentadiene through a Membrane Catalyst from a Pd alloy with 10 vol. % Ru increases the rate and selectivity of hydrogenation to cyclopentene, compared with the experiment carried out at the same temperature and partial reagent pressure, but without hydrogen transfer to the Membrane Catalyst. 2. 2. Joining dehydrogenation of isopropyl alcohol and hydrogenation of cyclopentadiene increases even more the rate of both reactions, the selectivity of conversion of cyclopentadiene to cyclopentene and increases the amount of hydrogen formed during dehydrogenation of alcohol that is passed through the Membrane. © 1979
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Conversions of ethylene on a silver Membrane Catalyst
Kluwer Academic Publishers-Plenum Publishers, 2020Co-Authors: Gryaznov V.m., Smirnov V.s., Gul'yanova S.g., Ermilova M.m.Abstract:1. Oxygen diffusing through a silver Membrane Catalyst is more active in the formation of products of the complete oxidation of ethylene than oxygen introduced in a mixture with ethylene. 2. The permeability of silver to oxygen passes through a minimum with increasing ethylene pressure at the output surface of the silver Membrane and reaches a value equal to the permeability in the case of diffusion into vacuum. © 1976 Plenum Publishing Corporation