A CuSiAlO_(x)catalyst was prepared through infrared-heating calcination and employed to catalyze vapor furfural(FFR)hydrogenation in a fixed-bed reactor.Its catalytic performance was systematically evaluated and compa...A CuSiAlO_(x)catalyst was prepared through infrared-heating calcination and employed to catalyze vapor furfural(FFR)hydrogenation in a fixed-bed reactor.Its catalytic performance was systematically evaluated and compared to that of a catalyst derived from the same precursor but calcined using an electric oven.The hydrogenation tests were performed at temperatures varying in 140~180℃,H_(2)/FFR(mol/mol)ratios in 4:1~8:1,and liquid hourly space velocity(LHSVs)in 0.6~1.0 h^(-1).The catalyst CuSiAlO_(x)-IH(prepared by infrared-heating calcination)demonstrated higher FFR conversion than CuSiAlO_(x)-EH(prepared by electric-oven heating)did.Under the conditions of a H_(2)/FFR ratio of 6:1,a temperature of 140℃,and an LHSV of 0.6 h^(-1),the CuSiAlO_(x)-IH catalyst achieved a 99.70%FFR conversion and 95.72%selectivity to furfur alcohol(FOL)in a continuous test for 18 h.This time duration with good stability was twice longer than that enabled by CuSiAlO_(x)-EH.Characterization of the fresh,reduced,and spent catalysts revealed that the catalyst CuSiAlO_(x)-IH,compared to CuSiAlO_(x)-EH,possessed more Cu defects,a higher BET surface area,a smaller average size,and the narrower size distribution of active-species particles.These structural advantages thus rendered the CuSiAlO_(x)-IH catalyst superior in its catalysis of the FFR hydrogenation reactions.展开更多
基金supported by Youth Fund of National Natural Science Foundation of China(NO.22108175)Natural Science Foundation of Liaoning province(2021-NLTS-12-09)+2 种基金Liaoning Innovation Talents Program in University(Liao[2020]389)Liaoning Revitalization Tal-ents Program(XLYC1907029)Shenyang Young and Middle-aged Sci-ence&Technology Talents Program(RC210365).
文摘A CuSiAlO_(x)catalyst was prepared through infrared-heating calcination and employed to catalyze vapor furfural(FFR)hydrogenation in a fixed-bed reactor.Its catalytic performance was systematically evaluated and compared to that of a catalyst derived from the same precursor but calcined using an electric oven.The hydrogenation tests were performed at temperatures varying in 140~180℃,H_(2)/FFR(mol/mol)ratios in 4:1~8:1,and liquid hourly space velocity(LHSVs)in 0.6~1.0 h^(-1).The catalyst CuSiAlO_(x)-IH(prepared by infrared-heating calcination)demonstrated higher FFR conversion than CuSiAlO_(x)-EH(prepared by electric-oven heating)did.Under the conditions of a H_(2)/FFR ratio of 6:1,a temperature of 140℃,and an LHSV of 0.6 h^(-1),the CuSiAlO_(x)-IH catalyst achieved a 99.70%FFR conversion and 95.72%selectivity to furfur alcohol(FOL)in a continuous test for 18 h.This time duration with good stability was twice longer than that enabled by CuSiAlO_(x)-EH.Characterization of the fresh,reduced,and spent catalysts revealed that the catalyst CuSiAlO_(x)-IH,compared to CuSiAlO_(x)-EH,possessed more Cu defects,a higher BET surface area,a smaller average size,and the narrower size distribution of active-species particles.These structural advantages thus rendered the CuSiAlO_(x)-IH catalyst superior in its catalysis of the FFR hydrogenation reactions.
