LaNixMg0.8Al11.2-xO19＋δ催化甲烷与二氧化碳重整制合成气  

Hexaaluminate catalyst LaNi_xMg_(0.8)Al_(11.2-x)O_(19+δ) for carbon dioxide reforming with methane to syngas

作　　者：王君霞[1] 孟大维[1] 吴秀玲[1] 何明中[1] 潘会[1] 甄开吉[2] 

机构地区：[1]中国地质大学材料科学与化学工程学院,教育部纳米矿物材料及应用工程研究中心,湖北武汉430074 [2]吉林大学化学系,吉林长春130023

出　　处：《化工学报》2009年第10期2479-2483,共5页CIESC Journal

基　　金：中国地质大学(武汉)优秀青年教师资助计划项目(CUGQNL0817)~~

摘　　要：制备了一系列六铝酸盐LaNixMg0.8Al11.2-xO19+δ催化剂,考察了其对甲烷和二氧化碳重整制合成气的催化性能,并用XRD、UV-DRS、TPR对其结构进行了表征。结果表明,此系列催化剂形成了磁铅石型和β-Al2O3型两种结构的共同体,并且Mg和Ni均被镶嵌在六铝酸盐晶体的晶格中;催化活性考察结果表明,还原态LaNixMg0.8Al11.2-xO19+δ系列催化剂表现出良好的催化活性和还原稳定性,在相同的反应条件下,甲烷和二氧化碳的转化率均随Ni调变量的增大和温度的升高而增加。A series of hexaaluminate LaNixMg0.8Al11.2-xO19＋δ were prepared and characterized by means of XRD, UV-DRS and TPR. The results showed that the LaNixMg0.8Al11.2-xO19＋δare consisted of structures with both magnetoplumbite-type and β-Al2O3-type, and the modifier Ni and Mg have been incorporated into the hexaaluminate lattice. The prepared hexaaluminate LaNix Mg0.8 Al11.2-x O19＋δ possess higher catalytic activity and exhibits good reduction stability during the reaction of CO2 reforming with CH4 to syngas. Under similar reaction conditions, CH4 and CO2 conversions are clearly increased with increasing the x value and reaction temperature.

关 键 词：六铝酸盐 LaNixMg0.8Al11.2-xO19+δ 甲烷 二氧化碳 合成气 

分 类 号：O643.32[理学—物理化学]