原位共沉淀法制备NiMg(Al)O/γ-Al_2O_3催化剂及其酯交换性能  

In situ co-precipitation of NiMg(Al)O on γ-Al_2O_3 and its catalytic performance in the transesterification

作　　者：陈颖[1] 刘天聪 高彦华[1] 梁宇宁[1] 

机构地区：[1]东北石油大学石油与天然气化工省重点实验室,黑龙江大庆163318

出　　处：《燃料化学学报》2018年第1期59-66,共8页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(50476091)资助~~

摘　　要：以γ-Al_2O_3为载体通过原位共沉淀法制备NiMgAl-LDHs/γ-Al_2O_3,经焙烧后得到NiMg(Al)O/γ-Al_2O_3催化剂,通过TG-DTG、XRD、SEM、BET、FT-IR、CO2-TPD等手段对催化剂进行了表征,并对其在酯交换制备生物柴油反应中的催化性能进行了研究。结果表明,NiMgAl-LDHs和NiMg(Al)O成功在γ-Al_2O_3内孔表面生长,并有良好的结合度。催化剂对酯交换具有很高的催化活性;在醇油物质的量比为12∶1的条件下反应3 h,生物柴油产率为95%,重复使用七次后,生物柴油产率仍然在82%以上。NiMgAl-LDHs/γ-Al2O3 was first synthesized by in-situ co-precipitation method with γ-Al2O3 as support,which was further transformed to the NiMg（Al） O/γ-Al2O3 catalyst through calcination.The NiMg（Al） O/γ-Al2O3 catalyst was characterized by TG-DTG,XRD,SEM,N2 physisorption,FT-IR and CO2-TPD and its performance in the transesterification was investigated,for the production of biodiesel with microalgae oil and methanol as rawmaterials.The results showthat NiMgAl-LDHs and NiMg（Al） O are successfully developed on the surface and pores of γ-Al2O3 with high binding strength.The NiMg（Al） O/γ-Al2O3 catalyst exhibits high activity in transesterification; with a methanol/oil molar ratio of 12 ∶ 1,the yield of biodiesel oil reaches 95%after reaction for 3 h.Moreover,the yield of biodiesel is still above 82% after using seven times.

关 键 词：生物柴油 Γ-AL2O3 酯交换 水滑石 

分 类 号：TE667[石油与天然气工程—油气加工工程]