The hydrogenation of petroleum resin(PR)is an effective process to prepare high value-added hydrogenated PR(HPR).However,the preparation of non-noble metal-based catalysts with high catalytic activity for PR hydrogena...The hydrogenation of petroleum resin(PR)is an effective process to prepare high value-added hydrogenated PR(HPR).However,the preparation of non-noble metal-based catalysts with high catalytic activity for PR hydrogenation still remains a challenge.Herein,a La promoted Ni-based catalyst is reported through the thermal reduction of quaternary Ni La Mg Al-layered double hydroxides(Ni La Mg Al-LDHs).The incorporation of La is beneficial to the reduction and stability of Ni particles with reduced particle size,and the increased alkalinity effectively mitigates the breakage of molecular chains of PR.As a result,the La promoted Ni-based catalyst exhibits high catalytic activity and excellent stability for PR hydrogenation.A hydrogenation degree of 95.4%and 96.1%can be achieved for HC_(5)PR and HC_(9) PR with less reduced softening point,respectively.Notably,the hydrogenation degree still maintains at 92.7%even after 100 hours’reaction,much better than that without La incorporation or prepared using conventional impregnation method.展开更多
Photothermal CO_(2) reduction is an efficient and sustainable catalytic path for CO_(2) treatment.Here,we successfully fabricated a novel series of Ni-based catalysts(Ni-x)via H2 reduction of NiAl-layered double hydro...Photothermal CO_(2) reduction is an efficient and sustainable catalytic path for CO_(2) treatment.Here,we successfully fabricated a novel series of Ni-based catalysts(Ni-x)via H2 reduction of NiAl-layered double hydroxide nanosheets at temperatures(x)ranging from 300 to 600°C.With the increase of the reduction temperature,the methane generation rate of the Ni-x catalyst for photothermal CO_(2) hydrogenation gradually increased under ultraviolet-visible-infrared(UV-vis-IR)irradiation in a flow-type system.The Ni-600 catalyst showed a CO_(2) conversion of 78.4%,offering a CH4 production rate of 278.8 mmol·g^(−1)h−1,with near 100%selectivity and 100 h long-term stability.Detailed characterization analyses showed metallic Ni nanoparticles supported on amorphous alumina are the catalytically active phase for CO_(2) methanation.This study provides a possibility for large-scale conversion and utilization of CO_(2) from a sustainable perspective.展开更多
基金financially supported by the National Natural Science Foundation of China(22078064)Natural Science Foundation of Fujian Province for Distinguished Young Scholar(2018J06002)。
文摘The hydrogenation of petroleum resin(PR)is an effective process to prepare high value-added hydrogenated PR(HPR).However,the preparation of non-noble metal-based catalysts with high catalytic activity for PR hydrogenation still remains a challenge.Herein,a La promoted Ni-based catalyst is reported through the thermal reduction of quaternary Ni La Mg Al-layered double hydroxides(Ni La Mg Al-LDHs).The incorporation of La is beneficial to the reduction and stability of Ni particles with reduced particle size,and the increased alkalinity effectively mitigates the breakage of molecular chains of PR.As a result,the La promoted Ni-based catalyst exhibits high catalytic activity and excellent stability for PR hydrogenation.A hydrogenation degree of 95.4%and 96.1%can be achieved for HC_(5)PR and HC_(9) PR with less reduced softening point,respectively.Notably,the hydrogenation degree still maintains at 92.7%even after 100 hours’reaction,much better than that without La incorporation or prepared using conventional impregnation method.
基金The authors are grateful for financial support from the National Key Projects for Fundamental Research and Development of China(Nos.2018YFB1502002,2017YFA0206904,and 2017YFA0206900)the National Natural Science Foundation of China(Nos.51825205,51772305,21871279,21902168,and 52072382)+5 种基金the Beijing Natural Science Foundation(Nos.2191002,and 2194089)the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB17000000)the Royal Society-Newton Advanced Fellowship(No.NA170422)the International Partnership Program of Chinese Academy of Sciences(Nos.GJHZ1819 and GJHZ201974)the K.C.Wong Education Foundation,the Central China Normal University(No.2020YBZZ019)the Youth Innovation Promotion Association of the CAS and the Open Fund of the Key Laboratory of Thermal Management and Energy Utilization of Aircraft,Ministry of Industry and Information Technology,Nanjing University of Aeronautics and Astronautics(No.CEPE2020014)。
文摘Photothermal CO_(2) reduction is an efficient and sustainable catalytic path for CO_(2) treatment.Here,we successfully fabricated a novel series of Ni-based catalysts(Ni-x)via H2 reduction of NiAl-layered double hydroxide nanosheets at temperatures(x)ranging from 300 to 600°C.With the increase of the reduction temperature,the methane generation rate of the Ni-x catalyst for photothermal CO_(2) hydrogenation gradually increased under ultraviolet-visible-infrared(UV-vis-IR)irradiation in a flow-type system.The Ni-600 catalyst showed a CO_(2) conversion of 78.4%,offering a CH4 production rate of 278.8 mmol·g^(−1)h−1,with near 100%selectivity and 100 h long-term stability.Detailed characterization analyses showed metallic Ni nanoparticles supported on amorphous alumina are the catalytically active phase for CO_(2) methanation.This study provides a possibility for large-scale conversion and utilization of CO_(2) from a sustainable perspective.
