燃料化学学报2025，Vol.53Issue(11)：1678-1686,9.DOI:10.3724/2097-213X.2025.JFCT.0022
含碳铜基催化剂制备及其乙炔选择性加氢性能研究
Preparation of carbon-containing copper-based catalysts and its performance in selective hydrogenation of acetylene
摘要
Abstract
The solid precursor was synthesized by adding NaOH dropwise to the Cu(NO3)2 solution while passing acetylene gas,and the precursor was reduced under H2 atmosphere to produce the copper-based catalyst,containing CuxC.The prepared precursors and catalysts were characterized by XRD,XPS,TEM,GC-MS and N2 physisorption-desorption.The catalysts were evaluated in the selective hydrogenation of acetylene.The results showed that in the strongly alkaline environment provided by NaOH,Cu2+is reduced by the introduced acetylene gas to form Cu+,which then reacts with acetylene to generate Cu2C2.Under the coexistence of Cu2+and alkaline conditions,Cu2C2 undergoes the Glaser coupling reaction to form polyynic copper.The precursor containing copper acetylide and polyynic copper is then reduced by H2 to obtain a copper-based catalyst containing CuxC-Cu.The optimal preparation conditions of the catalyst were acetylene gas flux time of 1 h,molar ratio of NaOH to Cu(NO3)2 of OH-/Cu2+=4∶1,precursor synthesis temperature of 50 ℃ and hydrogen reduction temperature of 150 ℃.The copper-based catalysts prepared under the optimum conditions showed 100％acetylene conversion and 18％ethane selectivity at 95℃ and 0.1 MPa,which remained stable for 100 h.关键词
碳化铜/炔铜/乙炔/选择加氢Key words
copper carbide/copper polyynes/acetylene/selective hydrogenation分类
化学引用本文复制引用
朱对虎,张嘉璐,王伟..含碳铜基催化剂制备及其乙炔选择性加氢性能研究[J].燃料化学学报,2025,53(11):1678-1686,9.基金项目
The project was supported by the General Project of Ningxia Higher Education Scientific Research(NYG2024265)and the Ningxia Natural Science Foundation(2023AAC03392).宁夏高校科学研究一般项目(NYG2024265)和宁夏自然科学基金(2023AAC03392)资助 （NYG2024265）
