花椒籽油乙酯生物柴油的制备
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摘要
以花椒籽油和乙醇为原料,采用酯交换法制备花椒籽油乙酯生物柴油。采用单因素实验研究了催化剂种类和用量、醇油摩尔比、反应温度、反应时间对生物柴油转化率的影响。依据响应面法中的中心组合设计对酯交换反应制备花椒籽油乙酯生物柴油的工艺条件进行了优化。结果表明,花椒籽油乙酯生物柴油制备的最优工艺条件为:以乙醇钠为催化剂,催化剂用量1. 7%,醇油摩尔比11. 5∶1,反应时间120 min,反应温度73℃。在最优条件下,生物柴油转化率达到97. 95%。
The preparation of biodiesel from Zanthoxylum bungeanum seed oil and ethanol by alkali-catalyzed transesterification was studied. First,single factor experiment was used to study the influences of catalyst type and dosage,molar ratio of ethanol to oil,reaction temperature and reaction time on the conversion rate of biodiesel. Then the preparation conditions were optimized by central composite design of response surface methodology. The results showed that the optimal preparation conditions were obtained as follows: with sodium ethoxide as catalyst and its dosage 1. 7%,molar ratio of ethanol to oil 11. 5∶ 1,reaction time 120 min and reaction temperature 73 ℃. Under these conditions,the conversion rate reached97. 95%.
The preparation of biodiesel from Zanthoxylum bungeanum seed oil and ethanol by alkali-catalyzed transesterification was studied. First,single factor experiment was used to study the influences of catalyst type and dosage,molar ratio of ethanol to oil,reaction temperature and reaction time on the conversion rate of biodiesel. Then the preparation conditions were optimized by central composite design of response surface methodology. The results showed that the optimal preparation conditions were obtained as follows: with sodium ethoxide as catalyst and its dosage 1. 7%,molar ratio of ethanol to oil 11. 5∶ 1,reaction time 120 min and reaction temperature 73 ℃. Under these conditions,the conversion rate reached97. 95%.
引文
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[14]刘瑞林,詹汉英,张志琪.山茱萸籽总黄酮的响应曲面法优化微波辅助提取工艺的研究[J].食品工业科技,2012(7):228-231.
[15]赵华,王虹,任晶.响应面法对玉米黄色素提取工艺的优化[J].粮食与饲料工业,2010(12):42-44.
[2]SINHA S,AGARWAL A K,GARG S.Biodiesel development from rice bran oil:transesterification process optimization and fuel characterization[J].Energy Conv Manag,2008,49:1248-1257.
[3]李堂,周建红,黄朋,等.正己烷体系中酶催化菜籽油制备乙酯生物柴油[J].中国油脂,2007,32(12):45-48.
[4]刘志强,李堂,周建红,等.分步加醇脂肪酶催化菜籽油制备乙酯生物柴油[J].中国粮油学报,2008,23(2):81-85.
[5]ZHANG J,WANG X J,HUANG Z Y,et al.Preparation and reaction dynamics on biodiesel made from Zanthoxylum bungeanum seed oil and methanol[J/OL].J Renew Sust Energy,2013,5(4):043123[2018-04-18].https://doi.org/10.1063/1.4817736.
[6]ZHANG J,WANG X J,HAN Q L,et al.Acid-catalyzed esterification and kinetics of Zanthoxylum bungeanum seed oil for biodiesel preparation[J].Res J Chem Environ,2013,17(12):38-44.
[7]黄文捷.花椒籽油制备生物柴油的工艺研究[D].陕西杨凌:西北农林科技大学,2008.
[8]张军华,杨芳霞,苏印泉,等.制备生物柴油用高FFA花椒籽油的酸催化降酸[J].中国粮油学报,2008,23(1):84-87.
[9]杨芳霞,李秀红,张军华,等.催化剂浓度对花椒油酯化产物酸价的影响[J].西北林学院学报,2006,21(6):166-169.
[10]PETERSON C L,REECE D L,THOMPSON J C,et al.Ethyl ester of rapeseed used as a biodiesel fuel-a case study[J].Biomass Bioenerg,1996,10:331-336.
[11]李玲艳,张剑,黄智勇.甘油铜分光光度法测定生物柴油转化率的研究[J].应用化工,2012,41(12):2163-2165.
[12]SRIVASTAVA A,PRASAD R.Triglycerides-based diesel fuels[J].Renew Sust Energ Rev,2000,4:111-133.
[13]ZHOU W,BOOCOCK D B G.Phase behavior of the basecatalyzed transesterification of soybean oil[J].J Am Oil Chem Soc,2006,83:1041-1045.
[14]刘瑞林,詹汉英,张志琪.山茱萸籽总黄酮的响应曲面法优化微波辅助提取工艺的研究[J].食品工业科技,2012(7):228-231.
[15]赵华,王虹,任晶.响应面法对玉米黄色素提取工艺的优化[J].粮食与饲料工业,2010(12):42-44.