Mn和Zr助剂对介孔碳负载钴基催化剂费托合成反应性能的影响  

Effects of Mn and Zr promoters on the performance of ordered mesoporous carbon supported Co catalyst in Fischer-Tropsch synthesis

作　　者：张庆玲[1,2] 郭荷芹[1] 侯博[1] 王俊刚[1] 李德宝[1] 贾丽涛[1] ZHANG Qing-ling GUO He-qin HOU Bo WANG Jun-gang LI De-bao JIA Li- tao(State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原030001 [2]中国科学院大学,北京100049

出　　处：《燃料化学学报》2017年第6期682-688,共7页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(21273265;21503252);中国科学院战略性先导科技专项"低阶煤清洁高效梯级利用关键技术与示范"(XDA07070700);山西省煤基重点科技攻关项目(MH2014-13);山西省基础研究计划项目(2014021014-6;201601D021044)资助~~

摘　　要：采用浸渍法制备了Mn和Zr改性的介孔碳负载钴基催化剂,采用X射线衍射(XRD)、比表面积测定、H_2程序升温还原(H_2-TPR)、H_2/CO程序升温脱附(TPD)及X射线光电子能谱(XPS)等手段对催化剂的物化性质进行了表征,采用固定床反应器对其F-T反应性能进行了研究。结果表明,Mn或Zr助剂的添加均降低了CH_4的选择性。其中,Mn助剂的添加提高了C_(2-4)的选择性,提高了烯烷比,而Zr的添加提高了钴物种的分散度,增加了反应活性位点,显著提高了钴基催化剂的F-T反应活性和C_(5+)选择性。Cobalt-based catalysts supported on ordered mesoporous carbon （Co/OMC） were modified with Mn and Zr promoters by the co-impregnation method. The cobalt-based catalysts were characterized by XRD,N2 sorption, H2-TPR, H2/CO-TPD and XPS; the promoting effects of Mn and Zr on the catalytic performance of Co/OMC in Fischer-Tropsch synthesis （FTS） were investigated in a fixed-bed reactor. The results indicate that the addition of either Mn or Zr can greatly reduce the selectivity to CH4 for FTS over Co/OMC. Moreover, Mn as a promoter can enhance the selectivity to C2-4 hydrocarbons and the olefin/paraffin ratio, whereas Zr promotes the dispersion of cobalt species and increases the number of active Co sites, leading to a significant increase in the FTS activity and selectivity to C5＋ hydrocarbons.

关 键 词：费托合成 钴基催化剂 介孔碳 锰助剂 锆助剂 

分 类 号：O643[理学—物理化学]