凹凸棒石催化重整生物质焦油中的二甲苯  

Catalytic Steam Reforming of Xylene in Biomass Gasification by Palygorskite

作　　者：宋磊[1] 陈天虎[1] 陈冬[1] 张先龙[2] 彭书传[1] 刘海波[1] 

机构地区：[1]合肥工业大学资源与环境工程学院,合肥230009 [2]合肥工业大学化学工程学院,合肥230009

出　　处：《硅酸盐学报》2011年第7期1135-1139,共5页Journal of The Chinese Ceramic Society

基　　金：国家"863"计划(2006AA03Z337);国家自然科学基金(5077-4027)资助项目

摘　　要：以二甲苯作生物质焦油的模拟化合物,用凹凸棒石负载镍作催化剂来研究二甲苯的催化重整反应。研究了温度、空速(载气流速与催化剂体积的比值)、Ni的负载量、水碳比[水蒸气与二甲苯中碳原子的摩尔比,n(S)/n(C)]对催化活性的影响并考察了催化剂的寿命。结果表明:当反应条件为n(S)/n(C)=6.6,空速为856 h-1,Ni的担载量(Ni负载在凹凸棒石上的质量分数)为5%时,二甲苯的转化率最高;催化剂的催化活性随着反应温度的升高而增加,并在实验确定的最优条件下,在300 min内呈基本稳定趋势。Palygorskite（PG） supported Ni catalysts were prepared,and their steam reforming catalytic activities were examined by xylene as a model tar compound in biomass syngas.Effects of temperature,space velocity,content of Ni loading and mole ratio of steam to carbon（n（S）/n（C）） on the catalytic activities were investgated.The life of catalysts was also investigated.The results show that the optimal conditions for the highest catalytic yield are n（S）/n（C） of 6.6,N2（balance） space velocity of 856 h-1,and Ni content loaded on the palygorskite of 5%.The catalysts had a high catalytic activity at the increased temperature,and could keep a steady-state activity in 300 min under the optimized conditions.

关 键 词：凹凸棒石 生物质焦油 催化重整反应 镍基催化剂 

分 类 号：P578[天文地球—矿物学] P579[天文地球—地质学]