钯基双金属合金催化甲酸制氢研究  

Investigation on Catalytic Formic Acid-to-Hydrogen Production by Palladium-based Bimetallic Alloys

作　　者：孙朝 胡辰峰 徐然 孙志强[1] SUN Zhao;HU Chenfeng;XU Ran;SUN Zhiqiang(School of Energy Science and Engineering,Central South University,Changsha 410083,China)

机构地区：[1]中南大学能源科学与工程学院,长沙410083

出　　处：《工程热物理学报》2023年第2期321-331,共11页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.52106193)。

摘　　要：甲酸具有来源广、成本低、质量储氢密度高等优势,成为潜在的化学储氢载体之一,然而,现在甲酸脱氢技术存在催化剂易失活、产物CO浓度高等挑战。开发高性能甲酸脱氢催化剂并实现脱氢产物的选择性调控是推动甲酸制氢技术长效发展的关键。本文提出以生物炭为载体、含钯双金属合金为活性组分,构筑Pd-M/BC(M=Cu, Ni, Fe, Co;BC为生物炭)催化剂,实现甲酸低温、高转化率及低CO选择性制氢。考察了不同热解温度生物炭载体、活性组分对甲酸脱氢性能的影响,结果表明,150°C、0.006 mL/min甲酸流率下可得到最低的CO选择性(1.31%)与高甲酸转化率(74.88%),该研究可为Pd-M/BC催化甲酸脱氢技术的发展提供理论指导。Formic acid has the advantages of wide sources, low cost and high mass hydrogen storage density, making it one of the potential chemical hydrogen storage carriers. However, the dehydrogenation technology of formic acid has the challenges of catalyst deactivation and high product CO concentration. Therefore, the development of high-performance formic acid dehydrogenation catalyst and the selective regulation of dehydrogenation products are the key to promote the long-term development of formic acid hydrogen production technology. In this paper, the structure of Pd-M/BC(M=Cu, Ni, Fe, Co;BC = biochar) catalyst was used to achieve low temperature, high conversion and low CO selectivity of formic acid hydrogen production. The effects of biochar carriers and active components at different pyrolysis temperatures on the dehydrogenation performance of formic acid were investigated. The results showed that the lowest CO selectivity(1.31%) and high formic acid conversion(74.88%) were obtained at 150°C and formic acid flow rate of 0.006mL/min. The study are expected to provide theoretical guidance for the development of catalytic dehydrogenation of formic acid by Pd-M/BC.

关 键 词：甲酸 制氢 生物炭 钯基合金 浸渍法 

分 类 号：TK91[动力工程及工程热物理]