化工进展
化工進展
화공진전
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2012年
6期
1250-1254
,共5页
溶胶凝胶%超细镍基催化剂%甲基环己烷%甲苯
溶膠凝膠%超細鎳基催化劑%甲基環己烷%甲苯
용효응효%초세얼기최화제%갑기배기완%갑분
sol-gel%supported ultrafine nickel catalysts%methylcyclohexane%toluene
以正硅酸乙酯(TEOS)、酞酸丁酯、硝酸镍为原料,采用溶胶-凝胶法制备了超细镍基催化剂,并进行了表征,通过改变工艺条件进行单因素实验,确定了超细镍基催化剂催化甲苯加氢的最合适工艺条件为:反应温度170℃、压力0.6 MPa、空速4 h-1、氢烃比10︰1,甲苯加氢生成甲基环己烷的转化率为100%,在80~200℃的实验范围内,选择性良好,并无开环及其它副反应的发生,甲基环己烷的选择性100%,实验表明溶胶-凝胶法制备的超细镍基催化剂是优良的甲苯加氢催化剂。
以正硅痠乙酯(TEOS)、酞痠丁酯、硝痠鎳為原料,採用溶膠-凝膠法製備瞭超細鎳基催化劑,併進行瞭錶徵,通過改變工藝條件進行單因素實驗,確定瞭超細鎳基催化劑催化甲苯加氫的最閤適工藝條件為:反應溫度170℃、壓力0.6 MPa、空速4 h-1、氫烴比10︰1,甲苯加氫生成甲基環己烷的轉化率為100%,在80~200℃的實驗範圍內,選擇性良好,併無開環及其它副反應的髮生,甲基環己烷的選擇性100%,實驗錶明溶膠-凝膠法製備的超細鎳基催化劑是優良的甲苯加氫催化劑。
이정규산을지(TEOS)、태산정지、초산얼위원료,채용용효-응효법제비료초세얼기최화제,병진행료표정,통과개변공예조건진행단인소실험,학정료초세얼기최화제최화갑분가경적최합괄공예조건위:반응온도170℃、압력0.6 MPa、공속4 h-1、경경비10︰1,갑분가경생성갑기배기완적전화솔위100%,재80~200℃적실험범위내,선택성량호,병무개배급기타부반응적발생,갑기배기완적선택성100%,실험표명용효-응효법제비적초세얼기최화제시우량적갑분가경최화제。
Ultrafine nickel-based catalyst was prepared by sol-gel using tetraethoxy-silane(TEOS), n-butyl phthalate acid,and nickel nitrate as raw materials,and the samples were characterized.The most appropriate process condition was determined for the ultrafine nickel-based hydrogenation catalysts toluene by changing the temperature,pressure,space velocity,hydrogen and other hydrocarbon process conditions.The results show that the maximum conversion of toluene hydrogenation rate of 100% when the temperature is between 160—170 ℃,pressure is between 0.6—0.8 MPa,airspeed is 4 h-1,hydrogen-hydrocarbon ratio is 10∶1.Selectivity within 80—200 ℃ range is better than others without open-loop and other side reactions.Selectivity can reach 100%. Therefore,a nickel-based catalyst from dual silicon source sol-gel preparation is an excellent catalyst for toluene hydrogenation.