松木模板法制备CaAl_(2x)O_(3x+1)固体碱催化剂  

Preparation of CaAl_(2x)O_(3x+1) solid base catalyst by pinewood template method

作　　者：李晓红 牛婧 王雅君 靳福全 Li Xiaohong;Niu Jing;Wang Yajun;Jin Fuquan(Department of Chemistry and Chemical Engineering,Taiyuan Institute of Technology,Taiyuan,Shanxi,China)

机构地区：[1]太原工业学院化学与化工系

出　　处：《石油与天然气化工》2023年第3期52-55,共4页Chemical engineering of oil & gas

基　　金：太原工业学院水平提升工程(大学生创新训练项目)“钙铝固体碱催化剂用于制备生物柴油的研究”(GK2022075)。

摘　　要：目的采用松木模板法制备固体碱催化剂旨在改变催化剂结构、提高催化剂性能。方法以一水乙酸钙、二水碱式乙酸铝为原料、松木屑为模板,经浸渍、干燥、焙烧制备CaAl_(2x)O_(3x+1)固体碱催化剂。采用单因素试验考查钙铝物质的量比、焙烧温度及焙烧时间对催化剂活性的影响。对催化剂及前驱体进行TG、XRD及SEM表征。结果制备CaAl_(2x)O_(3x+1)固体碱催化剂的最佳条件:钙铝物质的量比4∶1、焙烧温度900℃、焙烧时间7 h。催化剂前驱体温度超过900℃后分解基本结束。CaAl_(2x)O_(3x+1)固体碱催化剂晶相结构类似松木屑模板,是由大量无定型物质(Al 2O 3、CaO或其复合物)和少量晶体(CaO)构成的表面光滑的亚微米级颗粒组成。结论通过松木模板法可制得类似松木结构且活性较高的固体碱催化剂。Objective The purpose of preparing solid base catalyst by pinewood template method is to change the structure of the catalyst and improve the performance of the catalyst.Methods CaAl_(2x)O_(3x+1) solid base catalyst was prepared by impregnating,drying and roasting using calcium acetate monohydrate,aluminum acetate dihydrate as raw materials and pinewood sawdust as template.The effects of Ca/Al molar ratio,calcination temperature and calcination time on the catalyst activity were investigated by single factor test.The catalysts and precursors were characterized by TG,XRD and SEM.Results The optimum conditions for preparing CaAl_(2x)O_(3x+1) solid base catalyst were as follows:molar ratio of Ca/Al 4∶1,calcination temperature 900℃,calcination time 7 h.When the temperature of catalyst precursor exceeds 900℃,the decomposition basically ends.The crystal phase structure of CaAl_(2x)O_(3x+1) solid base catalyst is similar to that of pinewood sawdust template.It consists of a submicron particle with smooth surface composed of a large amount of amorphous substances(Al 2O 3,CaO or their compounds)and a small amount of crystals(CaO).Conclusion The solid base catalyst with structure similar pinewood and high activity can be prepared by pinewood template method.

关 键 词：模板法 松木屑 固体碱 催化剂 蓖麻油 生物柴油 

分 类 号：TQ426[化学工程] TK6[动力工程及工程热物理—生物能]