RuCu/Al_(2)O_(3)对CO_(2)选择性催化加氢  

Selective catalytic hydrogenation of CO_(2) on bimetallic RuCu/Al_(2)O_(3)

作　　者：鲍世东 孙敬雅 郑寿荣[1] BAO Shidong;SUN Jingya;ZHENG Shourong(State Key Laboratory of Pollution Control and Resource Reuse,School of the Environment,Nanjing University,Nanjing,210023,China;School of Environmental Science,Nanjing XiaoZhuang University,Nanjing,211171,China)

机构地区：[1]污染控制与资源化研究国家重点实验室,南京大学环境学院,南京210023 [2]南京晓庄学院环境科学学院,南京211171

出　　处：《环境化学》2024年第4期1204-1210,共7页Environmental Chemistry

基　　金：国家自然科学基金(21976086)资助.

摘　　要：将温室气体CO_(2)通过催化加氢的方式生产合成气具有重要的环境意义和经济价值.本文分别采用微乳液法和浸渍法制备了Ru-Cu双金属催化剂.通过不同分析手段对催化剂结构进行了表征,并考察了催化剂对CO_(2)催化加氢的性能.表征结果表明,在微乳液法合成的催化剂(ME-0.2Ru1Cu/Al_(2)O_(3))中Ru和Cu紧密接触,且钌铜纳米粒子尺寸均匀,而浸渍法合成的催化剂(im-0.2Ru1Cu/Al_(2)O_(3))存在单独的Ru和Cu纳米粒子.催化实验结果说明,Ru对Cu的掺杂可提高其催化活性但会降低CO选择性.采用微乳液法合成的双金属催化剂表现出比浸渍法更高的CO选择性.此外,固定钌铜比不变,提高负载量可以有效提高活性,而CO选择性无明显下降.Selective catalytic hydrogenation of greenhouse gas CO_(2) to synthesis gas has important environmental significance and economic value.In this paper,bimetallic Ru-Cu catalysts were prepared by the microemulsion and impregnation methods,respectively.The catalysts were characterized and their catalytic performances for CO_(2) hydrogenation were evaluated.The characterization results showed that in the catalyst prepared by the microemulsion method(ME-0.2Ru1Cu/Al_(2)O_(3)),Ru and Cu were in close contact in the Ru-Cu nanoparticles with uniform size,while separate Ru and Cu nanoparticles were identified in the catalyst prepared by the impregnation method(im-0.2Ru1Cu/Al_(2)O_(3)).The results of catalytic CO_(2) hydrogenation showed that doping Ru in Cu resulted in enhanced catalytic activity but reduced CO selectivity.The bimetallic catalysts prepared by the microemulsion method showed higher CO selectivity than those by the impregnation method.For the catalysts with identical Ru/Cu ratio,their activities increased with metal loading amount,while the CO selectivity did not decrease significantly.

关 键 词：CO_(2) 催化加氢 双金属 微乳液法 

分 类 号：X701[环境科学与工程—环境工程] TE665.3[石油与天然气工程—油气加工工程] TQ426[化学工程]