不同碳链长度脂肪酸甲酯的催化裂化产物分布规律

doi:10.11949/j.issn.0438-1157.20161498

化工学报 ›› 2017, Vol. 68 ›› Issue (5): 2057-2065.DOI: 10.11949/j.issn.0438-1157.20161498

不同碳链长度脂肪酸甲酯的催化裂化产物分布规律

蔡文静, 闫昊, 冯翔, 刘熠斌, 杨朝合

中国石油大学(华东)重质油国家重点实验室, 山东青岛 266580

收稿日期:2016-10-26 修回日期:2016-11-26 出版日期:2017-05-05 发布日期:2017-05-05
通讯作者: 刘熠斌
基金资助:
山东省自然科学基金项目（ZR2014BL015，ZR2016BB16）；国家自然科学基金项目（21606254）。

Product distribution in catalytic cracking of fatty acid methyl esters with different carbon chain lengths

CAI Wenjing, YAN Hao, FENG Xiang, LIU Yibin, YANG Chaohe

State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, Shandong, China

Received:2016-10-26 Revised:2016-11-26 Online:2017-05-05 Published:2017-05-05
Supported by:
supported by the Natural Science Foundation of Shandong Province (ZR2014BL015, ZR2016BB16) and the National Nature Science Foundation of China (21606254).

摘要/Abstract

摘要：

以辛酸甲酯、癸酸甲酯、月桂酸甲酯3种碳链长度不同的脂肪酸甲酯为原料，LVR-60为催化剂，在固定床上考察不同温度（350～500℃）下碳链长度对脂肪酸甲酯催化裂化产物分布的影响规律。结果表明，随着脂肪酸甲酯碳链长度的增长，脂肪酸甲酯转化率不断提高，脱氧产生的CO、CO₂逐渐增加，液体产物中烃类的含量逐渐增加而含氧衍生物逐渐减少。提高反应温度有利于提高脂肪酸甲酯转化率，得到较多的烃类，降低液相产物中含氧衍生物的含量。在低温下，脂肪酸甲酯裂化生成的醛、酯、羧酸、酮等含氧衍生物的含量较高，其裂化过程中CO₂是主要的脱氧产物；而高温下有机液体产物中几乎不含含氧衍生物，CO为主要脱氧产物。

关键词: 脂肪酸甲酯, 催化裂化, 反应温度, CO, CO₂

Abstract:

Influence of carbon chain length of fatty acid methyl ester (FAME) on product distribution in catalytic cracking process was investigated in a fixed-bed microreactor at various temperatures. Octanoic acid methyl ester (OAME), decanoic acid methyl ester (DAME) and lauric acid methyl ester (LAME) were used as feeds, meanwhile LVR-60 was selected as catalyst. Results showed that with the increase of carbon number of fatty acid methyl ester (FAME), the conversion of FAME increased. Moreover, the content of CO and CO₂ from the deoxygenation of FAME and content of hydrocarbons in the liquid product had similar trends, while the content of oxygen-containing compound (OCC) in liquid product decreased. In addition, raising reaction temperature was beneficial for the conversion of FAME, resulting in more hydrocarbons and lower oxygen-containing compound (OCC) content in liquid product. At lower temperature, CO₂ was the main product of deoxygenation, and aldehydes, esters, carboxylic acids and ketones were the main organic oxygenated compounds generated from catalytic cracking of FAME. However, at higher temperature, liquid products contained scarcely any organic oxygenated compounds, and CO was the main product of deoxygenation.

Key words: fatty acid methyl ester, catalytic cracking, reaction temperature, CO, CO₂

中图分类号:

TQ519

蔡文静, 闫昊, 冯翔, 刘熠斌, 杨朝合. 不同碳链长度脂肪酸甲酯的催化裂化产物分布规律[J]. 化工学报, 2017, 68(5): 2057-2065.

CAI Wenjing, YAN Hao, FENG Xiang, LIU Yibin, YANG Chaohe. Product distribution in catalytic cracking of fatty acid methyl esters with different carbon chain lengths[J]. CIESC Journal, 2017, 68(5): 2057-2065.

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不同碳链长度脂肪酸甲酯的催化裂化产物分布规律

Product distribution in catalytic cracking of fatty acid methyl esters with different carbon chain lengths

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