KOH/Al_2O_3固体碱催化酯交换合成生物柴油的研究 |
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引用本文: | 李琳,;买楠,;刘雅敏,;李文静. KOH/Al_2O_3固体碱催化酯交换合成生物柴油的研究[J]. 中南民族学院学报(自然科学版), 2007, 0(3) |
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作者姓名: | 李琳, 买楠, 刘雅敏, 李文静 |
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作者单位: | [1]中南民族大学化学与材料科学学院催化材料科学湖北省暨国家民委—教育部共建重点实验室 中南民族大学化学与材料科学学院催化材料科学湖北省暨国家民委—教育部共建重点实验室 武汉 |
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基金项目: | 中南民族大学引进人才重点自然科学基金(YZZ05010) |
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摘 要: | 采用等体积浸渍法制备了KOH/Al_2O_3负载型固体碱催化剂,并将其用于菜籽油与甲醇酯交换法合成生物柴油的研究;分别考察了催化剂附载量、煅烧温度、醇油摩尔比、反应温度、反应时间等条件对生物柴油产率的影响;结果表明:用等体积浸渍法,在400℃煅烧5 h,制得负载量为20%(w)的KOH/Al_2O_3催化剂.当催化剂用量为5%(w),醇油摩尔比为12:1,在60℃下反应2 h后,生物柴油产率高达92.3%(w).运用X-射线衍射、比表面积测定等手段对催化剂结构进行了表征,结果表明催化剂的活性与其晶相和比表面积密切相关.
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关 键 词: | 生物柴油 氢氧化钾/三氧化二铝 酯交换 固体碱 甲醇 |
Preparation of Biodiesel by Transesterification over KOH/Al_2O_3 Catalyst |
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Affiliation: | Li Lin Mai Nan Liu Yamin Li Wenjing Lect; Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission Ministry of Education; Hubei Province; SCUFN; Wuhan 430074; China; |
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Abstract: | Synthesis of biodiesel by transesterification of rapeseed oil and methanol catalyzed by KOH/Al_2O_3 solid base was studied.The catalyst was prepared by isochoric impregnation.Effects of some factors on the transesterification were investigated systematically and reaction conditions were optimized.The optimum reaction conditions on KOH/Al_2O_3catalyst were:mass ratio of KOH to Al_2O_320%;calcination temperature 400℃for 5 h; molar ratio of methanol to oil 12:1,the amount of catalyst 5 wt%;reaction temperature... |
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Keywords: | biodiesel KOH/Al_2O_3 transesterifieation solid base methanol |
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