磷化过程对MoP催化剂醋酸加氢合成乙醇性能的影响  

Effects of phosphating process of MoP catalyst on hydrogenation of acetic acid to ethanol

作　　者：何喜旺 肖勇[1] 贾丽涛[1] 李德宝[1] 侯博[1] 王俊刚[1] 

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3期323-328,共6页Journal of Fuel Chemistry and Technology

基　　金：中国科学院山西煤炭化学研究所煤转化国家重点实验室自主研究课题资助~~

摘　　要：制备了系列磷化钼催化剂用于醋酸加氢合成乙醇活性评价,并采用XRD、XPS和SEM等技术对催化剂进行表征。结果表明,催化剂除含有MoP外,还有MoP_2O_7和MoO_2等物种,催化醋酸生成乙醇的活性物种是MoP,或者是MoP与MoP_2O_7、MoO_2协同起催化作用。磷化温度一定程度上影响催化剂的形成和活性组分的分布,磷化温度太低,MoP形成量少,磷化温度太高,MoP发生团聚和烧结,磷化温度为650℃时制备的催化剂活性最高。磷钼物质的量比为1.0时催化剂的乙醇合成性能最高。A series of molybdenum phosphide （MoP） catalysts for the hydrogenation of acetic acid to ethanol were successfully synthesized and identified by means of X-ray diffraction （XRD）, X-ray photoelectron spectroscopy （XPS） and Scanning electron microscope （SEM）.The results reveal that MoP2O7 and MoO2 exist on the catalyst surface together with MoP.MoP or the synergistic effects of MoP2O7 and MoO2 species play roles in hydrogenation of acetic acid to ethanol.Phosphating temperature significantly affects the formation and dispersion of phosphide.A low phosphating temperature is not sufficient for the formation of MoP, but a high phosphating temperature leads to the agglomeration of MoP.The catalyst reduced at 650℃ has the highest hydrogenation activity and its P/Mo molar ratio is 1.0.

关 键 词：磷化钼 醋酸 催化加氢 乙醇 

分 类 号：O643[理学—物理化学]