| 生物油中反应性化合物对羧酸在超临界甲醇中酯化的影响 |
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| 引用本文： | 崔洪友,马成亮,李志合,易维明.生物油中反应性化合物对羧酸在超临界甲醇中酯化的影响[J].燃料化学学报,2011,39(5):347-354. |
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| 作者姓名： | 崔洪友 马成亮 李志合 易维明 |
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| 作者单位： | 1.School of Chemical Engineering, Shandong University of Technology, Zibo 255091, China;
2.Shandong Research Center of Engineering and Technology for Clean Energy, Shandong University of Technology, Zibo 255091, China |
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| 基金项目： | 国家高技术研究发展计划(863计划,2009AA05Z401); 山东省自然科学基金(ZR2009BL023) |
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| 摘 要： | 采用乙酸（AC）、丙烯酸（AR）、乙酰丙酮（AA）、糠醛、2-甲氧基苯酚（MP）和水等组分，研究了羧酸在超临界甲醇中的酯化反应，并考察了各种组分对酯化反应的影响。通过两种羧酸单独酯化和共同酯化的特性以及水分影响的考察发现，超临界酯化过程中存在着不同酸的酯交换作用；水分对酯化反应具有明显的抑制作用，但超临界酯化时具有更高的耐水性。水分的抑制作用主要是削弱了羰基正离子的亲电能力，降低酯化反应速率，而不是因为化学反应平衡移动。超临界酯化的高温可加快反应速率，较弱的氢键环境可部分抵消羰基正离子亲电能力的削弱作用。AA和糠醛对酯化反应基本没有影响，但AA自身会被转化为丙酮和乙酸甲酯，而糠醛会发生缩醛化反应。MP对AR的酯化具有促进作用，并抑制聚合，从而可以提高酯化的转化率和选择性。
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| 关 键 词： | style="font-size: 9pt line-height: 模拟生物油" target="_blank">150%">模拟生物油 超临界 酯化 反应性化合物 |
| 收稿时间： | 2010-12-29 |
Effect of the reactive compounds in bio-oils on est erification of the contained carboxylic acids in supercritical methanol |
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| CUI Hong-you,MA Cheng-liang,LI Zhi-he,YI Wei-ming.Effect of the reactive compounds in bio-oils on est erification of the contained carboxylic acids in supercritical methanol[J].Journal of Fuel Chemistry and Technology,2011,39(5):347-354. |
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| Authors: | CUI Hong-you MA Cheng-liang LI Zhi-he YI Wei-ming |
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| Institution: | CUI Hong-you1,MA Cheng-liang1,LI Zhi-he2,YI Wei-ming2 (1.School of Chemical Engineering,Shandong University of Technology,Zibo 255091,China,2.Shandong Research Center of Engineering and Technology for Clean Energy,China) |
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| Abstract: | Using acetic acid(AC),acrylic acid(AR),acetyl acetone(AA),furfural,2-methoxy phenol(MP) and water as representative compounds and p-toluene sulfonic acid as catalyst,the esterification upgrading was examined in supercritical methanol and under atmosphere pressure.The comparison results of esterification and simultaneous esterification of AC and AR as well as the effect of water show that supercritical esterification is superior to normal liquid-phase esterification in view of acid removal.Furthermore,transe... |
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| Keywords: | simulated bio-oil supercritical esterification reactive compound |
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