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Patrick Sharrock - One of the best experts on this subject based on the ideXlab platform.
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Valorization of calcium carbonate-based Solid Wastes for the treatment of hydrogen sulfide in a semi-continuous reactor
Chemical Engineering Journal, 2018Co-Authors: Marta Galera Martínez, Doan Pham Minh, Ange Nzihou, Patrick SharrockAbstract:The carbonation of residual brines generates large volumes of carbonate-based Solid Wastes. Physicochemical properties of these Solids are adequate for acid-gas removal. This work studies the valorization of calcium carbonated-based Solid Wastes for efficient H2S removal from air at low concentrations (≤200 ppmv) in a three-phase semi-continuous reactor. Synthetic air polluted with H2S was bubbled into the slurry of two different Wastes in a stirred tank to evaluate their effect for H2S removal. The efficiency of H2S removal was kept constant and could reach up to 98% during 8 h of reaction. Adequate physico-chemical characterization of used sorbents allowed understanding the interaction of sulfide species with sorbent particles. Thus, the reaction pathway for H2S removal was determined. It has been demonstrated that the dissolution of H2S gas at the gas-liquid interface was then accelerated by high basicity of calcium carbonate-based Wastes, followed by the oxidation of dissolved sulfide species. This last was catalyzed by metals and metals oxides which were initially present in the Solid Wastes. The results obtained demonstrate the possibility to valorize the carbonates which have been precipitated during the carbonation of industrial brines to develop a low cost H2S removal process.
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valorization of calcium carbonate based Solid Wastes for the treatment of hydrogen sulfide from the gas phase
Industrial & Engineering Chemistry Research, 2015Co-Authors: Huynh Pham Xuan, Ange Nzihou, Doan Pham Minh, Marta Galera Martinez, Patrick SharrockAbstract:This paper focuses on the valorization of calcium carbonate-based Solid Wastes for the removal of hydrogen sulfide from gas phase. Two Solid Wastes taken from industrial sites for the production of sodium carbonate and sodium bicarbonate by the Solvay process were analyzed by different physicochemical methods. Calcium carbonate was found as the main component of both Solid Wastes. Trace amounts of other elements such as Mg, Al, Fe, Si, Cl, Na, etc. were also present in these Wastes. These Solid Wastes showed higher sorption activity for the removal of H2S, compared to a pure commercial calcium carbonate. The contact time was found as an important parameter for the complete H2S uptake. The addition of well-dispersed iron-based particles could be carried out by the standard incipient wetness impregnation method. Sorbent containing 1 wt % of spiked iron had the similar sorption behavior compared to a commercial activated carbon, in terms of reactivity and reactivation possibility.
Ange Nzihou - One of the best experts on this subject based on the ideXlab platform.
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Valorization of calcium carbonate-based Solid Wastes for the treatment of hydrogen sulfide in a semi-continuous reactor
Chemical Engineering Journal, 2018Co-Authors: Marta Galera Martínez, Doan Pham Minh, Ange Nzihou, Patrick SharrockAbstract:The carbonation of residual brines generates large volumes of carbonate-based Solid Wastes. Physicochemical properties of these Solids are adequate for acid-gas removal. This work studies the valorization of calcium carbonated-based Solid Wastes for efficient H2S removal from air at low concentrations (≤200 ppmv) in a three-phase semi-continuous reactor. Synthetic air polluted with H2S was bubbled into the slurry of two different Wastes in a stirred tank to evaluate their effect for H2S removal. The efficiency of H2S removal was kept constant and could reach up to 98% during 8 h of reaction. Adequate physico-chemical characterization of used sorbents allowed understanding the interaction of sulfide species with sorbent particles. Thus, the reaction pathway for H2S removal was determined. It has been demonstrated that the dissolution of H2S gas at the gas-liquid interface was then accelerated by high basicity of calcium carbonate-based Wastes, followed by the oxidation of dissolved sulfide species. This last was catalyzed by metals and metals oxides which were initially present in the Solid Wastes. The results obtained demonstrate the possibility to valorize the carbonates which have been precipitated during the carbonation of industrial brines to develop a low cost H2S removal process.
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valorization of calcium carbonate based Solid Wastes for the treatment of hydrogen sulfide from the gas phase
Industrial & Engineering Chemistry Research, 2015Co-Authors: Huynh Pham Xuan, Ange Nzihou, Doan Pham Minh, Marta Galera Martinez, Patrick SharrockAbstract:This paper focuses on the valorization of calcium carbonate-based Solid Wastes for the removal of hydrogen sulfide from gas phase. Two Solid Wastes taken from industrial sites for the production of sodium carbonate and sodium bicarbonate by the Solvay process were analyzed by different physicochemical methods. Calcium carbonate was found as the main component of both Solid Wastes. Trace amounts of other elements such as Mg, Al, Fe, Si, Cl, Na, etc. were also present in these Wastes. These Solid Wastes showed higher sorption activity for the removal of H2S, compared to a pure commercial calcium carbonate. The contact time was found as an important parameter for the complete H2S uptake. The addition of well-dispersed iron-based particles could be carried out by the standard incipient wetness impregnation method. Sorbent containing 1 wt % of spiked iron had the similar sorption behavior compared to a commercial activated carbon, in terms of reactivity and reactivation possibility.
Yousheng Lin - One of the best experts on this subject based on the ideXlab platform.
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tga ftir analysis of co combustion characteristics of paper sludge and oil palm Solid Wastes
Energy Conversion and Management, 2015Co-Authors: Yousheng Lin, Xingxing NingAbstract:Abstract The kinetic thermal behavior and gaseous pollutant emissions of co-combustion between paper sludge and oil-palm Solid Wastes with a full range of blending ratio were investigated via a thermogravimetric simultaneous analyzer coupled with a Fourier transform infrared measurements. Co-combustion paper sludge with oil-palm Solid Wastes created significant changes in the thermal behaviors. With the exception of 10O90P blend, the combustion process of other blended fuels could be distinguished into three individual stages. The 90O10P blend showed the highest comprehensive combustion index ( S = 5.59 × 10 −07 min −2 °C −3 ) and the (d S /d(ratio)) reached the maximum at blended samples of 20O80P, these observations suggested the blending of paper sludge with oil-palm Solid Wastes improved the comprehensive combustion performance. Further analysis of the emission profiles of gaseous pollutants revealed that the co-combustion paper sludge and oil-palm Solid Wastes lead to a reduction in gaseous emissions (SO 2 , NO and CO 2 ). Furthermore, co-combustion promoted the KCl of oil-palm Solid Wastes to convert into HCl in fuel gas, which could reduce the possibility of slagging, corrosion and fouling during co-combustion. The analysis results indicated 10–30% of paper sludge in the blends could be determined as the optimum ratio range for co-combustion paper sludge and oil-palm Solid Wastes. The nth order reaction model by the Coats–Redfern method was used to determine the kinetics parameters for the co-combustion of paper sludge, oil-palm Solid Wastes and their respective blended fuels. The analysis results showed that nth order reaction model could fit the co-combustion process very well.
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investigation on thermochemical behavior of co pyrolysis between oil palm Solid Wastes and paper sludge
Bioresource Technology, 2014Co-Authors: Yousheng Lin, Yawen CaoAbstract:The pyrolysis characteristics of oil-palm Solid Wastes, paper sludge and their blends were studied via thermogravimetric analysis. Blends ranging from 10 wt.% to 90 wt.% on dosage ratio were prepared to investigate their co-pyrolysis behavior and kinetics. There was a synergistic interaction at low temperature during co-pyrolysis between oil-palm Solid Wastes and paper sludge. The synergistic interaction would improve thermochemical pyrolysis reactivity of the blends, which could be attributed to the hydrogenation role and the potential mineral catalytic effects on paper sludge pyrolysis. The value of average activation energy obtained by Starink and Friedmen methods did not gradually decline with the increasing proportion of oil-palm Solid Wastes in the blends. The lowest average activation energy was achieved when the percentage of oil-palm Solid Wastes was 70%, which was 152 kJ/mol by Starink and 149 kJ/mol by Friedmen, respectively.
Xingxing Ning - One of the best experts on this subject based on the ideXlab platform.
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tga ftir analysis of co combustion characteristics of paper sludge and oil palm Solid Wastes
Energy Conversion and Management, 2015Co-Authors: Yousheng Lin, Xingxing NingAbstract:Abstract The kinetic thermal behavior and gaseous pollutant emissions of co-combustion between paper sludge and oil-palm Solid Wastes with a full range of blending ratio were investigated via a thermogravimetric simultaneous analyzer coupled with a Fourier transform infrared measurements. Co-combustion paper sludge with oil-palm Solid Wastes created significant changes in the thermal behaviors. With the exception of 10O90P blend, the combustion process of other blended fuels could be distinguished into three individual stages. The 90O10P blend showed the highest comprehensive combustion index ( S = 5.59 × 10 −07 min −2 °C −3 ) and the (d S /d(ratio)) reached the maximum at blended samples of 20O80P, these observations suggested the blending of paper sludge with oil-palm Solid Wastes improved the comprehensive combustion performance. Further analysis of the emission profiles of gaseous pollutants revealed that the co-combustion paper sludge and oil-palm Solid Wastes lead to a reduction in gaseous emissions (SO 2 , NO and CO 2 ). Furthermore, co-combustion promoted the KCl of oil-palm Solid Wastes to convert into HCl in fuel gas, which could reduce the possibility of slagging, corrosion and fouling during co-combustion. The analysis results indicated 10–30% of paper sludge in the blends could be determined as the optimum ratio range for co-combustion paper sludge and oil-palm Solid Wastes. The nth order reaction model by the Coats–Redfern method was used to determine the kinetics parameters for the co-combustion of paper sludge, oil-palm Solid Wastes and their respective blended fuels. The analysis results showed that nth order reaction model could fit the co-combustion process very well.
Pen-chi Chiang - One of the best experts on this subject based on the ideXlab platform.
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co 2 mineralization and utilization by alkaline Solid Wastes for potential carbon reduction
Nature Sustainability, 2020Co-Authors: Shuyuan Pan, Pen-chi Chiang, Yi Hung Chen, Liangshih Fan, Hyunook Kim, Xiang Gao, Tungchai Ling, Silu PeiAbstract:CO2 mineralization and utilization using alkaline Solid Wastes has been rapidly developed over the last ten years and is considered one of the promising technologies to stabilize Solid Wastes while combating global warming. Despite the publication of a number of reports evaluating the performance of the processes, no study on the estimation of the global CO2 reduction potential by CO2 mineralization and utilization using alkaline Solid Wastes has been reported. Here, we estimate global CO2 mitigation potentials facilitated by CO2 mineralization and utilization as a result of accelerated carbonation using various types of alkaline Solid Wastes in different regions of the world. We find that a substantial amount of CO2 (that is, 4.02 Gt per year) could be directly fixed and indirectly avoided by CO2 mineralization and utilization, corresponding to a reduction in global anthropogenic CO2 emissions of 12.5%. In particular, China exhibits the greatest potential worldwide to implement CO2 mineralization and utilization, where it would account for a notable reduction of up to 19.2% of China’s annual total emissions. Our study reveals that CO2 mineralization and utilization using alkaline Solid Wastes should be regarded as one of the essential green technologies in the portfolio of strategic global CO2 mitigation. CO2 mineralization and utilization via alkaline Solid Wastes shows promise for both stabilizing Solid waste and tackling climate change, but evidence of its actual CO2 reduction potential is scant. This study estimates that CO2 mineralization and utilization could lead to a 12.5% global reduction of CO2 emissions.
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deployment of accelerated carbonation using alkaline Solid Wastes for carbon mineralization and utilization toward a circular economy
ACS Sustainable Chemistry & Engineering, 2017Co-Authors: Kinjal J Shah, Minghuang Wang, Yi Hung Chen, Pen-chi ChiangAbstract:This study suggests that the waste-to-resource supply chain can offer an approach to address simultaneously the issues of waste management and CO2 emissions toward a circular economy. Alkaline Solid Wastes can be used to mineralize CO2 through an accelerated carbonation reaction, especially if the Wastes are generated near the point source of CO2, to achieve environmental and economic benefits. To enhance the performance of accelerated carbonation, a high-gravity carbonation process using a rotating packed bed reactor was developed and deployed. Due to additional energy consumption in high-gravity carbonation, the environmental benefits and economic costs should be critically assessed from a life-cycle perspective. In this study, the resource potential of alkaline Solid Wastes in Taiwan was first determined for CO2 mineralization and utilization using the high-gravity carbonation process. Then, the performances of the process from engineering, environmental, and economic perspectives were evaluated and ex...
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Deployment of Accelerated Carbonation Using Alkaline Solid Wastes for Carbon Mineralization and Utilization Toward a Circular Economy
2017Co-Authors: Shuyuan Pan, Minghuang Wang, Kinjal J Shah, Yi Hung Chen, Pen-chi ChiangAbstract:This study suggests that the waste-to-resource supply chain can offer an approach to address simultaneously the issues of waste management and CO2 emissions toward a circular economy. Alkaline Solid Wastes can be used to mineralize CO2 through an accelerated carbonation reaction, especially if the Wastes are generated near the point source of CO2, to achieve environmental and economic benefits. To enhance the performance of accelerated carbonation, a high-gravity carbonation process using a rotating packed bed reactor was developed and deployed. Due to additional energy consumption in high-gravity carbonation, the environmental benefits and economic costs should be critically assessed from a life-cycle perspective. In this study, the resource potential of alkaline Solid Wastes in Taiwan was first determined for CO2 mineralization and utilization using the high-gravity carbonation process. Then, the performances of the process from engineering, environmental, and economic perspectives were evaluated and exemplified by a steelmaking plant. The results indicated that, with a CO2 removal ratio of 97–98%, the energy consumption of the high-gravity carbonation was estimated to be ∼345 kWh/t-CO2. From the perspective of environmental benefits, CO2 emission from the cement industry could be indirectly avoided by roughly one t-CO2-eq/t-slag due to the utilization of carbonated products
