Ni/SBA-15/Al_2O_3/FeCrAl金属基结构化催化剂及其催化性能研究  

Ni/SBA-15/Al_2O_3/FeCrAl structure catalysts and their catalytic performance for methane reforming with carbon dioxide

作　　者：王开[1] 季生福[1] 李秀金[2] 张美丽[1] 万会军[1] 李成岳[1] 

机构地区：[1]北京化工大学化工学院化工资源有效利用国家重点实验室,北京100029 [2]北京化工大学化工学院环境工程系,北京100029

出　　处：《中国科技论文在线》2007年第8期612-616,共5页

基　　金：高等学校博士学科点专项科研基金(20030010002);北京市自然科学基金(8062023).

摘　　要：以FeCrAl合金薄片(厚度为0.05mm)为基材,Al2O3浆料为过渡层,不同Ni含量的Ni/SBA-15催化剂浆料为涂层,制备了Ni/SBA-15/Al2O3/FeCrAl金属基结构化催化剂,采用XRD和TPR表征了催化剂的结构,并对甲烷二氧化碳重整制合成气的催化反应进行了性能评价。结果表明,催化剂表面有FeCr,α-Al2O3,γ-Al2O3,SBA-15,NiO物相;催化剂中Ni含量大于4%时具有较高的CH4、CO2转化率和CO、H2的选择性,CO/H2保持在1左右,Ni含量为8%的Ni/SBA-15/Al2O3/FeCrAl催化剂在800℃的反应条件下1300小时仍具有很好的甲烷二氧化碳重整催化活性和稳定性;Ni物种在催化剂中与SBA-15和FeCrAl合金薄片之间存在一定的相互作用。A series of Ni/SBA-15/Al2O3/FeCrAl structure catalysts were prepared using the FeCrAl alloy foils as supports. The structure of catalysts was characterized by X-ray diffraction（XRD） and temperature programmed reduction（TPR） . The catalytic activity of the catalysts for the methane reforming with carbon dioxide to synthesis gas was evaluated. The results indicate that the surface phases of the catalysts were FeCr,α-Al2O3,γ-Al2O3,SBA-15 and NiO. Ni/SBA-15/Al2O3/FeCrAl structure catalysts had a higher conversion of CH4 and CO2 and selectivity of CO and H2 when Ni content up to 4%. 8%Ni/SBA-15/Al2O3/FeCrAl structure catalyst had an excellent catalytic activity and the stability for methane reforming with carbon dioxide at 825℃ and 1300 h. The Ni species of the catalysts had an interaction between the SBA-15 and FeCrAl alloy foil.

关 键 词：FeCrAl合金 结构化催化剂 NI 甲烷二氧化碳重整 合成气 

分 类 号：O643.36[理学—物理化学]