生物质焦油组分甲苯在镍/凹凸棒石上的二氧化碳催化重整  

CO_2 Reforming of Toluene from Biomass Tar over Ni/Palygorskite Catalyst

作　　者：施培超[1] 陈天虎[1] 张先龙[2] 陈冬[1] 宋磊[1] 李金虎[1] 

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥2300092 [2]合肥工业大学化学工程学院,安徽合肥230009

出　　处：《催化学报》2010年第10期1281-1285,共5页

基　　金：国家高技术研究发展计划(863计划;2007AA06Z118);国家自然科学基金(50774027)

摘　　要：以大比表面积的天然纳米矿物材料凹凸棒石(PG)为载体,采用等体积浸渍法制备了Ni/PG催化剂.运用X射线衍射、透射电镜和CO2程序升温脱附对Ni/PG催化剂进行了表征,并用于以甲苯为生物质焦油模型化合物的CO2催化重整反应.考察了反应温度、CO2浓度以及催化剂中Ni负载量对甲苯与CO2重整性能的影响.结果表明,吸附在催化剂表面的CO2存在三个脱附峰,其中高温脱附CO2与反应密切相关;随着CO2浓度、Ni负载量和反应温度的增加,甲苯转化率和H2产率升高.在800oC,CO2/PhCH3摩尔比为0.2～0.26时,甲苯转化率达最高;而在CO2/PhCH3摩尔比为0.2时,H2产率最高.催化剂上积炭量随CO2浓度的增加和反应温度的升高而显著降低.A nickel catalyst supported on palygorskite （PG） with large surface area was prepared by equal volume impregnation. Catalytic reforming of biomass tar over Ni/PG was studied using toluene as the model compound in the presence of CO2. X-ray diffraction, transmis-sion electron microscopy and CO2-temperature programmed desorption were used to characterized the catalyst samples. The influence of CO2 amount, reaction temperature, and Ni loading on toluene conversion, hydrogen yield, and carbon deposit was investigated. The results showed that three desorption peaks of CO2 appeared on both PG and the Ni/PG catalyst. The toluene conversion and H2 yield increased with the increase in the amounts of CO2 and Ni content as well as the reaction temperature. At 800 oC and CO2/PhCH3 molar ratio of 0.2–0.26, the toluene conversion was the highest; the H2 yield reached the highest at CO2/PhCH3 molar ratio of 0.2. Carbon deposition decreased with increasing the CO2 amount and reaction temperature.

关 键 词：生物质焦油 甲苯 凹凸棒石 催化重整 二氧化碳 

分 类 号：O643.32[理学—物理化学]