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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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ca/al固体碱催化菜籽油制备生物柴油
, PP. 331-336
Keywords: ca/al复合氧化物,固体碱,酯交换反应,生物柴油,菜籽油
Abstract:
？采用共沉淀法制备了ca/al复合氧化物固体碱催化剂,考察了沉淀剂种类、ca/al摩尔比、沉淀温度、溶液ph值、老化时间和焙烧温度等制备条件对其催化剂活性的影响。采用正交实验方法得到制备ca/al复合固体碱催化剂前躯体的最佳制备条件为,沉淀剂naoh,ca/al摩尔比为3,沉淀温度为60℃,沉淀过程中ph值保持在10,在90℃老化18h。在该最优条件下制备的催化剂前驱体主要以ca4al2o6(no3)2·10h2o晶相存在,在n2气保护下300℃焙烧2h后,催化剂形成高分散钙铝复合氧化物,且碱性强度达到26.5以上。在催化菜籽油和甲醇的酯交换反应中,菜籽油的转化率达到95%,脂肪酸甲酯的质量分数为95.9%。
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