摘要
通过正向沉淀法制备了三种沉淀剂(NaOH、Na2CO3和NH3·H2O)调控的Cu/Zn/Al催化剂,系统考察了其在甲醇水蒸气重整制氢的催化性能。表征结果表明,以Na2CO3为沉淀剂制备的Cu/Zn/Al-b催化剂展现出较为优异的物化特性:高比表面积、规整的介孔结构、丰富的酸性位点以及高度分散的CuO物种。制氢性能测试结果表明,Cu/Zn/Al-b催化剂在230℃下可实现甲醇转化率96.62%、H2产率94.73%、CO选择性达1.47%。80小时稳定性测试表明甲醇转化率始终保持在90%以上,制氢稳定性良好。本研究阐明了沉淀剂种类对催化剂的结构及活性影响机制,为设计高效甲醇水蒸气重整催化剂提供了重要参考。
This study prepared three types of Cu/Zn/Al catalysts using three precipitants(NaOH,Na2CO3,and NH3·H2O)via the forward precipitation method and systematically investigated their catalytic performance in hydrogen production via methanol steam reforming.Characterization results demonstrated that the Cu/Zn/Al-b catalyst prepared with Na2CO3 exhibited superior physicochemical properties:enhanced specific surface area,well-defined mesoporous structure,and highly dispersed CuO species.Furthermore,the Cu/Zn/Al-b catalyst possessed abundant acidic active sites.In catalytic performance evaluation,the Cu/Zn/Al-b catalyst achieved 96.62%methanol conversion and 94.73%hydrogen yield at 230°C,while maintaining CO selectivity as low as 1.47%.80-hour stability test revealed that the conversion rate remained above 90%,demonstrating excellent hydrogen production stability.This study elucidated the structure-activity relationship between precipitants and catalysts,providing significant references for designing high-efficiency methanol steam reforming catalysts.
作者
董媛
张鑫
彭元亭
程臣
杨明
Dong Yuan;Zhang Xin;Peng Yuanting;Cheng Chen;Yang Ming(China University of Geosciences,Wuhan 430074,China;Wuhan Institute of Marine Electric Propulsion,Wuhan 430064,China)
出处
《船电技术》
2025年第12期9-13,共5页
Marine Electric & Electronic Engineering
