新型催化剂V2O5/ZSM-5用于液体石蜡催化氧化合成脂肪酸

doi:10.16085/j.issn.1000-6613.2017.06.024

化工进展 ›› 2017, Vol. 36 ›› Issue (06): 2137-2142.DOI: 10.16085/j.issn.1000-6613.2017.06.024

新型催化剂V₂O₅/ZSM-5用于液体石蜡催化氧化合成脂肪酸

曲元瑗^1,2, 罗学刚^1,2

1 西南科技大学材料科学与工程学院, 四川绵阳 621010;
2 西南科技大学生物质材料教育部工程研究中心, 四川绵阳 621010

收稿日期:2016-12-20 修回日期:2017-03-01 出版日期:2017-06-05 发布日期:2017-06-05
通讯作者: 罗学刚
作者简介:曲元瑗(1989—),男,硕士研究生。E-mail:qyy425666809@163.com。
基金资助:
国家农业科技成果转化项目（2012G2006004）及青海省科技支撑计划项目（2015-SF-119）

Studies on a novel V₂O₅/ZSM-5 catalyst for catalytic oxidation of liquid paraffin to fatty acid

QU Yuanyuan^1,2, LUO Xuegang^1,2

1 Department of Mterials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China;
2 Engineering Research Center of Biomass Materials, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China

Received:2016-12-20 Revised:2017-03-01 Online:2017-06-05 Published:2017-06-05

摘要/Abstract

摘要： 以偏钒酸铵为主要原料，ZMS-5型分子筛为载体，采用共沉淀法制备了V₂O₅/ZSM-5催化剂，将其用于液体石蜡催化氧化合成了脂肪酸。利用能量色散X射线荧光光谱仪对所制备的催化剂进行表征，说明V₂O₅/ZSM-5催化剂制备成功。利用X射线衍射仪、X射线光电子能谱仪对反应前后的催化剂进行表征，说明V₂O₅/ZSM-5在液体石蜡氧化过程中只起催化效果。利用傅里叶变换红外光谱仪对所制备的氧化产物进行表征，证明了氧化产物中确有脂肪酸的存在。同时考察了在合成脂肪酸的过程中反应温度、反应时间、催化剂用量、反应气氛等工艺条件对液体石蜡催化氧化合成了脂肪酸效果的影响。实验结果表明：反应温度为150℃、反应时间为8h、催化剂用量为0.1g时，在纯氧气氛下可以合成性能最优的脂肪酸，其酸值为17.33mg（KOH）/g、皂化值为33.52mg（KOH）/g。

关键词: V₂O₅/ZSM-5, 液体石蜡, 脂肪酸, 催化氧化, 共沉淀法

Abstract: Using ammonium metavanadate as main raw material and Zeolite Socony Mobil-5(ZSM-5) as the carrier,the V₂O₅/ZSM-5 catalyst was prepared by coprecipitation and it was applied to the catalytic oxidation of liquid paraffin for the synthesis of fatty acid. The catalyst was characterized by Energy Dispersive X-Ray Fluoresence Spectrometer(EDX). EDX analysis indicated that the V₂O₅/ZSM-5 catalyst was prepared successfully. The catalysts before and after reaction were analyzed by X Ray Diffraction(XRD)and X ray Photoelectron Spectroscopy(XPS),which suggested that V₂O₅/ZSM-5 only play the catalytic role in the oxidation process of liquid paraffin. The prepared oxidation product was characterized by Fourier Transform Infrared Spectrometer(FTIR),and it was found that the fatty acid existed in the oxidation product. Meanwhile,the effect of reaction temperature,reaction time,dosage of catalyst and gas atmosphere on the performance of fatty acid was investigated. The experimental results showed that the optimal conditions for preparing fatty acid are as follows:temperature 150℃,reaction Time 8h,dose of catalyst 0.1g,and with pure oxygen. The acid value and the saponification of the product were 17.33mg(KOH)/g and 33.52mg(KOH)/g,respectively.

Key words: V₂O₅/ZSM-5, liquid paraffin, fatty acid, catalytic oxidation, coprecipitation

中图分类号:

O622.1

曲元瑗, 罗学刚. 新型催化剂V₂O₅/ZSM-5用于液体石蜡催化氧化合成脂肪酸[J]. 化工进展, 2017, 36(06): 2137-2142.

QU Yuanyuan, LUO Xuegang. Studies on a novel V₂O₅/ZSM-5 catalyst for catalytic oxidation of liquid paraffin to fatty acid[J]. Chemical Industry and Engineering Progress, 2017, 36(06): 2137-2142.

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新型催化剂V₂O₅/ZSM-5用于液体石蜡催化氧化合成脂肪酸

Studies on a novel V₂O₅/ZSM-5 catalyst for catalytic oxidation of liquid paraffin to fatty acid

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