乙醇水汽重整制氢反应中钯铜合金膜的透氢性能  

Hydrogen Permeation in a Thin Pd-Cu Alloy Membrane Reactor for Steam Reforming of Ethanol

作　　者：张小亮[1,2] 王卫平[1] 熊国兴[1] 杨维慎[1] 

机构地区：[1]中国科学院大连化学物理研究所催化基础国家重点实验室,辽宁大连116023 [2]江西师范大学化学化工学院,江西南昌330022

出　　处：《催化学报》2010年第8期1049-1053,共5页

基　　金：国家杰出青年科学基金(20725313);中国科学院大连化学物理研究所催化基础国家重点实验室开放基金(N-09-03);江西省教育厅青年基金(GJJ09465)

摘　　要：采用真空化学镀技术制备了厚度较薄的具有fcc结构的Pd0.9Cu0.1/Al2O3合金复合膜,在250～500°C,160～310kPa的乙醇水汽重整制氢模拟反应条件下,考察了不同醇/水比的H2-Ar-C2H5OH-H2O混合气体系中该膜的透氢性能.结果表明,乙醇和水的存在均相同程度地降低了膜的透氢性能,但测试条件下Pd-Cu合金膜仍保持完整的膜致密性和稳定的相结构.在500°C,310kPa,H2-Ar-C2H5OH-H2O(H2:Ar:(C2H5OH+H2O)体积比为60:30:10)混合气中,膜的最大透氢量为11.3m3/(m2·h),H2回收率大于62.5%.Pd-Cu合金膜在乙醇水汽重整制氢反应中具有潜在的应用前景.Hydrogen permeation through a thin fcc-Pd0.9Cu0.1 alloy composite membrane was investigated with H2-Ar-C2H5OH-H2O mixtures for this modeling reaction over a range of temperature （250-500 °C） and pressure （160-310 kPa）.The influence of temperature,feed pressure,feed flow rate,ratio of ethanol to steam,and hydrogen concentration of feed was examined under the operating conditions.Ethanol has inhibitive effect on hydrogen permeation performance through the membrane in comparison with that in pure hydrogen atmosphere.Moreover,hydrogen flux increased with increasing total mixture pressure and hydrogen concentration in the mixture feed but was not related to the ratio of ethanol to steam.Thus,the inhibitive influence of ethanol on hydrogen permeation was similar to that of steam under the same operating conditions.Although ethanol and steam can decrease hydrogen permeation,the hydrogen flux of membrane up to 11.3 m3/（m2·h） and hydrogen recovery over 62.5% were obtained in H2-Ar-C2H5OH-H2O （H2：Ar：（C2H5OH ＋ H2O） volume ratio=60：30：10） mixtures at 500 °C and 310 kPa.The membrane was stable without poisoning under ethanol-containing mixtures and would be suitable for the catalytic membrane reactor of steam reforming of ethanol to pure hydrogen production.

关 键 词：氢 钯 铜 合金膜 乙醇 水汽重整 膜催化反应器 

分 类 号：TQ116.2[化学工程—无机化工]