Cu-Zn-Al-Li催化生物质合成气合成甲醇  

Investigation into Methanol Synthesis from Biomass Derived Syngas over Cu-Zn-Al-Li Catalysts

作　　者：张喜通[1] 常杰[1] 王铁军[1] 付严[1] 

机构地区：[1]中国科学院广州能源研究所,广东广州510640

出　　处：《过程工程学报》2006年第1期104-107,共4页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:50476090);广东省科技计划资助项目(编号:2003B30803)

摘　　要：在模拟生物质合成气气氛(CO/H2/CO2/N2=22/47/27/4,体积比)下对Cu?Zn催化生物质合成气合成甲醇进行活性评价,发现Cu?Zn催化剂合成甲醇活性随反应时间单调下降,40h后Cu?Zn催化剂活性比初始活性下降15%,添加Al能提高Cu?Zn催化剂的稳定性,添加Al后的Cu?Zn?Al及Cu?Zn?Al?Li催化剂40h内合成甲醇的活性均未见明显下降.SEM和XRD表征研究发现,添加Li助剂有助于分散Cu活性组分,从而提高催化剂活性.不同压力、空速及气体成分下,CO转化率均远高于CO2转化率,CO是生物质合成气合成甲醇的主要C来源.The experiments of methanol synthesis were carried out from biomass derived syngas （CO/H2/CO2/N2=22/47/27/4） with different catalysts. The results showed that the activity of the Cu-Zn catalyst for methanol synthesis was decreased with the reaction time, and the activity was decreased by 15% after running for 40 h. The addition of Al could promote the stability of the Cu-Zn catalyst, and the activities of the Cu-Zn-Al catalyst and Cu-Zn-Al-Li catalyst were maintained almost constant after running for 40 h. Furthermore, the SEM and XRD analysis showed that the addition of Li promoted the dispersion of the active components in the catalysts, and the activity was promoted accordingly. The experiments were carried out by changing the reaction pressure, space velocity and syngas components, and the results showed that the conversion rate of CO was much higher than that of CO2, and the main carbon source of the product methanol was CO.

关 键 词：生物质合成气 催化剂 CO2 甲醇 

分 类 号：O643[理学—物理化学]