Ni-Fe/La_2O_2CO_3催化乙醇水蒸气重整制氢的研究  

La_2O_2CO_3 Supported Ni-Fe Catalysts for Hydrogen Production from Steam Reforming of Ethanol

作　　者：石秋杰[1] 马洪波[1] 彭子青[1] 谌伟庆[1] 张宁[1] 

机构地区：[1]南昌大学应用化学研究所,江西南昌330031

出　　处：《中国稀土学报》2012年第1期21-27,共7页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(20863006);江西省科技厅项目(0620042);江西省教育厅项目(GJJ09078)资助

摘　　要：采用La2(CO3)3空气焙烧法制备了La2O2CO3载体、采用浸渍法制备了Ni,Fe不同比例的Ni-Fe双金属催化剂及Ni/La2O2CO3,Fe/La2 O2 CO3催化剂,考察了各催化剂从300～700℃催化乙醇水蒸气重整反应的性能,并用BET,XRD,TPR等技术对催化剂进行表征。结果表明,相对单一金属催化剂,Ni-Fe双金属催化剂均表现出更高的活性,这可能是因为高分散的Ni,Fe和LaFeyNi1-yO3的共存作用。其中Ni含量为10%,Fe含量为5%时的Ni-Fe/La2O2CO3表现出最高的活性,400℃时乙醇的转化率为100%,H2的选择性最高达到94.1%,而CO的选择性则低至1.2%。La2O2CO3 was prepared by calcination of La2（CO3）3 in the air,and the catalysts Ni-Fe/La2O2CO3 with different mole ratio of Ni to Fe,Ni/La2O2CO3 and Fe/La2O2CO3 were prepared by impregnation method.The catalytic properties were evaluated on steam reforming of ethanol（SRE） from 300 to 700 ℃ under atmospheric pressure.The samples were characterized by BET,X-ray diffraction（XRD） and temperature programmed reduction（TPR）.The results showed that Ni-Fe bimetallic catalysts exhibited higher activities than single metallic catalysts,which was attributed to the co-existence of well dispersed Ni,Fe and LaFeyNi1-yO3.It was found that the catalyst Ni-Fe/La2O2CO3 containing 10% Ni and 5% Fe showed the best performance,and the conversion of ethanol was 100%,the selectivity of H2 was reached 94.1%,and the selectivity of CO was low to 1.2% at 400 ℃. 更多

关 键 词：制氢 乙醇水蒸气重整 NI-FE La2O2CO3 稀土 

分 类 号：O643.3[理学—物理化学]