预硫化温度对煤直接液化催化剂组分转变及其催化性能的影响  

Effect of sulfidation temperature on component transformation and catalytic performance of direct coal liquefaction catalyst

作　　者：陈晨[1] 李海杰 白杨 冯富祥 田磊 杨勇 刘源[1] 郭强 CHEN Chen;LI Hai-jie;BAI Yang;FENG Fu-xiang;TIAN Lei;YANG Yong;LIU Yuan;GUO Qiang(School of Chemical Engineering,Tianjin University,Tianjin 300350,China;National Energy Center for Coal to Liquids,Synfuels China Technology Co.Ltd,Beijing 101407,China;Synfuels China Technology(Inner Mongolia)Co.Ltd,Ordos 010300,China)

机构地区：[1]天津大学化工学院,天津300350 [2]中科合成油技术有限公司国家能源煤基液体燃料研发中心,北京101407 [3]中科合成油内蒙古有限公司,内蒙古鄂尔多斯010300

出　　处：《燃料化学学报》2022年第1期54-62,共9页Journal of Fuel Chemistry and Technology

摘　　要：在5%H_(2)S/N_(2)气氛,不同预硫化温度下制备了系列硫铁催化剂,并在5 MPa的1%H_(2)S/H_(2)气氛、360℃下研究了其催化萘的加氢活性。借助MES、XRD和XPS等表征手段,探究了催化剂在不同预硫化温度及反应条件下组分转变规律。结果表明,预硫化过程是硫由表面向内部,依照FeS_(2)→FeS、Fe_(1−x)S→Fe_(3)S_(4)→Fe_(2)O_(3)顺序渗硫的过程,而升高温度有利于硫向体相内的传递;接触1%H_(2)S/H_(2)气氛后晶粒由外向内各组分均快速转化为Fe_(1–x)S的过程;调控预硫化条件可以实现活性组分Fe_(1–x)S的含量高、晶粒小,于是可获得最高活性。A series of iron sulfide catalysts were prepared in 5%H_(2)S/N_(2)atmosphere at different pre-sulfidation temperatures,and their catalytic activity for naphthalene hydrogenation was studied at 360℃in 1%H_(2)S/H_(2)atmosphere at 5 MPa.The component transformation of the catalyst under varied pre-sulfidation temperature and reaction conditions was researched using MES,XRD and XPS.The results revealed that the sulfidation process was in the form of sulfurizing from surface to interior in the order of FeS_(2)→FeS、Fe_(1−x)S→Fe_(3)S_(4)→Fe_(2)O_(3)during which transferring sulfur to the body phase was benefited from the rise of temperature.After contacting 1%H_(2)S/H_(2)gas,the particles rapidly transformed to Fe_(1–x)S from outside to the inside.By adjusting sulfidation conditions,the Fe_(1–x)S content was high while the particle size was small,which made it possible to obtain the greatest activity of the catalyst.

关 键 词：煤直接液化 γ-Fe_(2)O_(3) 硫化 组分转变 萘加氢反应 

分 类 号：TQ536[化学工程—煤化学工程]