Cu助剂对聚乙烯醇辅助沉淀铁催化剂费托合成反应性能的影响  

Effect of Cu promoter on polyvinyl alcohol-assisted preparation of iron catalyst for Fischer-Tropsch synthesis

作　　者：马彩莲 董光华 刘霞 陈建刚[2] MA Cai-lian;DONG Guang-hua;LIU Xia;CHEN Jian-gang(Shanxi Institute of Energy,Jinzhong 030600,China;State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China)

机构地区：[1]山西能源学院,山西晋中030600 [2]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

出　　处：《燃料化学学报》2018年第7期835-840,共6页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(21373254);煤转化国家重点实验室自主研究课题(SKLCC 2018BWZ001);生物质热化学技术国家重点实验室项目(武汉);山西能源学院院级基金(ZY2017008)资助~~

摘　　要：通过共沉淀法或聚乙烯醇(PVA)辅助共沉淀法分别制备了Fe_2O_3和FeCu催化剂,结合BET、XRD、SEM、H_2-TPR等表征手段,研究了Cu助剂对PVA辅助的沉淀铁催化剂的织构性质、物相结构、形貌特征、还原行为以及F-T合成反应性能的影响。结果表明,Cu助剂的加入增大了铁基催化剂中α-Fe_2O_3的晶粒,减小了催化剂的BET比表面积和孔容,增大了孔径;改变了铁基催化剂的形貌;促进了铁基催化剂在H_2中的还原。反应过程中,在催化剂中只添加Cu助剂时,有利于提高催化剂的反应活性,而当同时加入Cu助剂和PVA时,由于Cu助剂与PVA较强的相互作用,反而降低了催化剂的反应活性,且催化剂的选择性向轻质烃方向偏移。Fe 2O 3 or FeCu catalysts were prepared by co-precipitation method with or without the assistance of polyvinyl alcohol （PVA）. The effect of Cu promoter on the structure and catalytic behaviour of the catalysts were investigated. The catalysts were characterized by BET, SEM, XRD, H 2-TPR and FT-IR techniques. The results showed that the addition of Cu promoter could enhance the crystal growth of α -Fe 2O 3, decrease BET surface area and pore volume and increase pore size and promote the reduction of the catalysts in H 2. In addition, Cu promoter remarkably influenced the surface morphology. In Fischer-Tropsch synthesis （FTS） reaction, the catalytic activity was increased when Cu promoter was added only. The addition of Cu promoter and PVA decreased the FTS activity, and shifted the hydrocarbon products to lighter molecular weight.

关 键 词：Cu助剂 PVA 共沉淀法 费托合成 

分 类 号：O643[理学—物理化学]