The Experts below are selected from a list of 42 Experts worldwide ranked by ideXlab platform
Colin E. Snape - One of the best experts on this subject based on the ideXlab platform.
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A novel approach to CO2 capture in Fluid Catalytic Cracking—Chemical Looping Combustion
Fuel, 2019Co-Authors: Fatih Güleç, Will Meredith, Chenggong Sun, Colin E. SnapeAbstract:Abstract Oil refineries collectively account for about 4–6% of global CO2 emissions and Fluid Catalytic Cracking (FCC) units are responsible for roughly 25% of these. Although post-combustion and oxy-combustion have been suggested to capture CO2 released from the regenerator of FCC units, Chemical Looping Combustion (CLC) is also a potential approach. In this study, the applicability of CLC for FCC units has been explored. A refinery FCC catalyst (equilibrium catalyst-ECat) was mixed mechanically with reduced oxygen carriers; Cu, Cu2O, CoO, and Mn3O4. To identify any detrimental effects of the reduced oxygen carriers on Cracking, the catalyst formulations were tested for n-hexadecane Cracking using ASTM D3907-13, the standard FCC microactivity test (MAT). To investigate the combustion reactivity of coke with physically mixed oxidised oxygen carriers, CuO, Co3O4 and Mn2O3, TGA tests were conducted on a low volatile semi-anthracite Welsh coal, which has a similar elemental composition to actual FCC coke, with various oxygen carrier to coke ratios over the temperature range 750–900 °C. The results demonstrated that, whereas Cu was detrimental for Cracking n-hexadecane with the ECat, Cu2O, CoO, and Mn3O4 have no significant effects on gas, liquid and coke yields, and product selectivity. Complete combustion of the model coke was achieved with CuO, Co3O4 and Mn2O3, once the stoichiometric ratio of oxygen carrier/coke was higher than 1.0 and sufficient time had been provided. These results indicate that the proposed CLC-FCC concept has promise as a new approach to CO2 capture in FCC.
Fatih Güleç - One of the best experts on this subject based on the ideXlab platform.
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A novel approach to CO2 capture in Fluid Catalytic Cracking—Chemical Looping Combustion
Fuel, 2019Co-Authors: Fatih Güleç, Will Meredith, Chenggong Sun, Colin E. SnapeAbstract:Abstract Oil refineries collectively account for about 4–6% of global CO2 emissions and Fluid Catalytic Cracking (FCC) units are responsible for roughly 25% of these. Although post-combustion and oxy-combustion have been suggested to capture CO2 released from the regenerator of FCC units, Chemical Looping Combustion (CLC) is also a potential approach. In this study, the applicability of CLC for FCC units has been explored. A refinery FCC catalyst (equilibrium catalyst-ECat) was mixed mechanically with reduced oxygen carriers; Cu, Cu2O, CoO, and Mn3O4. To identify any detrimental effects of the reduced oxygen carriers on Cracking, the catalyst formulations were tested for n-hexadecane Cracking using ASTM D3907-13, the standard FCC microactivity test (MAT). To investigate the combustion reactivity of coke with physically mixed oxidised oxygen carriers, CuO, Co3O4 and Mn2O3, TGA tests were conducted on a low volatile semi-anthracite Welsh coal, which has a similar elemental composition to actual FCC coke, with various oxygen carrier to coke ratios over the temperature range 750–900 °C. The results demonstrated that, whereas Cu was detrimental for Cracking n-hexadecane with the ECat, Cu2O, CoO, and Mn3O4 have no significant effects on gas, liquid and coke yields, and product selectivity. Complete combustion of the model coke was achieved with CuO, Co3O4 and Mn2O3, once the stoichiometric ratio of oxygen carrier/coke was higher than 1.0 and sufficient time had been provided. These results indicate that the proposed CLC-FCC concept has promise as a new approach to CO2 capture in FCC.
Chenggong Sun - One of the best experts on this subject based on the ideXlab platform.
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A novel approach to CO2 capture in Fluid Catalytic Cracking—Chemical Looping Combustion
Fuel, 2019Co-Authors: Fatih Güleç, Will Meredith, Chenggong Sun, Colin E. SnapeAbstract:Abstract Oil refineries collectively account for about 4–6% of global CO2 emissions and Fluid Catalytic Cracking (FCC) units are responsible for roughly 25% of these. Although post-combustion and oxy-combustion have been suggested to capture CO2 released from the regenerator of FCC units, Chemical Looping Combustion (CLC) is also a potential approach. In this study, the applicability of CLC for FCC units has been explored. A refinery FCC catalyst (equilibrium catalyst-ECat) was mixed mechanically with reduced oxygen carriers; Cu, Cu2O, CoO, and Mn3O4. To identify any detrimental effects of the reduced oxygen carriers on Cracking, the catalyst formulations were tested for n-hexadecane Cracking using ASTM D3907-13, the standard FCC microactivity test (MAT). To investigate the combustion reactivity of coke with physically mixed oxidised oxygen carriers, CuO, Co3O4 and Mn2O3, TGA tests were conducted on a low volatile semi-anthracite Welsh coal, which has a similar elemental composition to actual FCC coke, with various oxygen carrier to coke ratios over the temperature range 750–900 °C. The results demonstrated that, whereas Cu was detrimental for Cracking n-hexadecane with the ECat, Cu2O, CoO, and Mn3O4 have no significant effects on gas, liquid and coke yields, and product selectivity. Complete combustion of the model coke was achieved with CuO, Co3O4 and Mn2O3, once the stoichiometric ratio of oxygen carrier/coke was higher than 1.0 and sufficient time had been provided. These results indicate that the proposed CLC-FCC concept has promise as a new approach to CO2 capture in FCC.
Will Meredith - One of the best experts on this subject based on the ideXlab platform.
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A novel approach to CO2 capture in Fluid Catalytic Cracking—Chemical Looping Combustion
Fuel, 2019Co-Authors: Fatih Güleç, Will Meredith, Chenggong Sun, Colin E. SnapeAbstract:Abstract Oil refineries collectively account for about 4–6% of global CO2 emissions and Fluid Catalytic Cracking (FCC) units are responsible for roughly 25% of these. Although post-combustion and oxy-combustion have been suggested to capture CO2 released from the regenerator of FCC units, Chemical Looping Combustion (CLC) is also a potential approach. In this study, the applicability of CLC for FCC units has been explored. A refinery FCC catalyst (equilibrium catalyst-ECat) was mixed mechanically with reduced oxygen carriers; Cu, Cu2O, CoO, and Mn3O4. To identify any detrimental effects of the reduced oxygen carriers on Cracking, the catalyst formulations were tested for n-hexadecane Cracking using ASTM D3907-13, the standard FCC microactivity test (MAT). To investigate the combustion reactivity of coke with physically mixed oxidised oxygen carriers, CuO, Co3O4 and Mn2O3, TGA tests were conducted on a low volatile semi-anthracite Welsh coal, which has a similar elemental composition to actual FCC coke, with various oxygen carrier to coke ratios over the temperature range 750–900 °C. The results demonstrated that, whereas Cu was detrimental for Cracking n-hexadecane with the ECat, Cu2O, CoO, and Mn3O4 have no significant effects on gas, liquid and coke yields, and product selectivity. Complete combustion of the model coke was achieved with CuO, Co3O4 and Mn2O3, once the stoichiometric ratio of oxygen carrier/coke was higher than 1.0 and sufficient time had been provided. These results indicate that the proposed CLC-FCC concept has promise as a new approach to CO2 capture in FCC.
Bahram Ghorbani - One of the best experts on this subject based on the ideXlab platform.
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Energetic and exergetic evaluation of methanol synthesis process in a hybridized system of methane Cracking, Chemical looping combustion, thermal desalination and photovoltaic panels
Journal of Thermal Analysis and Calorimetry, 2021Co-Authors: Mohammad Hossein Monajati Saharkhiz, Bahram GhorbaniAbstract:Due to limited energy supply sources and environmental issues, the use of renewable energy to replace fossil fuels and reduce pollution has increased. One of the easiest, safest, and most portable ways to store renewable energy for a long time is to convert it to liquid methanol. In this paper, a novel integrated system is developed for cogeneration of liquid methanol and freshwater using methane Cracking unit integrated with Chemical looping combustion, methanol production cycle, multi-effect desalination, and photovoltaic panels. The thermal integration of new structures for cogeneration leads to a reduction in the number of equipment used and an increase in efficiency. This integrated structure produces 23.97 kmol h^−1 liquid methanol, 204.3 kmol h^−1 desalinated water, 42.49 kmol h^−1 solid carbon, 58.52 kmol h^−1 nitrogen, and 668.9 kmol h^−1 hot water. The waste heat of the Chemical looping combustion is used to supply methane Cracking unit, which produces 84.99 kmol h^−1 hydrogen, 7.582 kmol h^−1 carbon dioxide, and 24.74 kW power. These products and the excess carbon dioxide supplied from outside are used as input feed for the liquid methanol production cycle. Waste heat from the liquid methanol production cycle is used to supply heat to the thermal desalination cycle and produce hot water. The thermal energy and exergy efficiencies of the integrated structure are 48.64% and 71.68%, respectively. In the hybrid structure, the largest share of exergy destruction belongs to reactors (65.61%), photovoltaic panels (17.73%), and heat exchangers (10.97%), respectively. Sensitivity analysis in different operating conditions is used to investigate the sensitivity and changes in the output and important parameters of the process.