铁镍磷化物催化剂在CO加氢制低碳醇反应中的应用(英文)  

Synthesis of Mixed Alcohols from CO Hydrogenation over Iron and Nickel Metal Phosphide Catalysts

作　　者：宋宪根[1,2] 丁云杰[1,3] 陈维苗[1] 董文达[1,2] 裴彦鹏[1,2] 臧娟[1,2] 严丽[1] 吕元[1] 

机构地区：[1]中国科学院大连化学物理研究所清洁能源国家实验室,辽宁大连116023 [2]中国科学院研究生院,北京100049 [3]中国科学院大连化学物理研究所催化基础国家重点实验室,辽宁大连116023

出　　处：《催化学报》2012年第12期1938-1944,共7页

基　　金：supported by the National Natural Science Foundation of China (20903090)~~

摘　　要：通过程序升温还原法制备了一系列氧化硅负载的不同P/M(M=Fe和Ni)摩尔比的金属磷化物催化剂,在553K,5.0MPa和H2:CO=2(摩尔比)的反应条件下用固定床反应器测试了它们催化CO加氢反应性能.结果表明,在FePx/SiO2(x为P/M摩尔比)催化剂上,液相产物是以甲醇为主的低碳含氧化物的混合物.而在NiPx/SiO2催化剂上,气态产物主要为甲烷,液相产物绝大多数是甲醇.表征结果表明,磷化物催化剂上的Fe2P,Fe3P,Ni,Ni2P,Ni3P和Ni12P5晶相在反应条件下是稳定的,没有形成磷化物的金属铁,在反应后转变成碳化铁晶相.A series of silica supported iron and nickel metal phosphides with different molar ratios of P to metal were synthesized by the temperature programmed reduction method. Their catalytic performance for CO hydrogenation in a fixed bed reactor was tested with the conditions of 553 K, 5.0 MPa, and H2：CO = 2 （molar ratio）. With the FePx/SiO2 catalysts （x denotes the molar ratio of P to metal）, the product was a mixture of oxygenates containing methanol as the major component. With the NiPx/SiO2 samples, the liquid product was mainly methanol. The Fe2P, Fe3P, Ni, Ni2P, Ni3P, and Ni12P5 phases were stable during CO hydrogenation, while most of the metallic Fe phase transformed into iron carbide.

关 键 词：一氧化碳 加氢 含氧化物 金属磷化物 磷化铁 磷化镍 氧化硅 

分 类 号：O643.32[理学—物理化学]