Pyrolysis of methyl ricinoleate by microwave-assisted heating coupled with atomization feeding
Pyrolysis of methyl ricinoleate by microwave-assisted heating coupled with atomization feeding
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微波辅助加热结合雾化进料热解蓖麻油酸甲酯
DOI：
10.1016/j.jaap.2018.09.005
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发表时间：
2018-10-01
影响因子：
6
通讯作者：
Ji, Jianbing
中科院分区：
文献类型：
--
作者：
Yu, Shangzhi;Duan, Ying;Ji, Jianbing
稳定的高温反应部位以及原料加热的均匀性和速度对热解过程起着关键作用。本研究采用微波辅助加热和雾化进料相结合的方法对蓖麻酸甲酯(MR)进行热解，实现了十一烯酸甲酯(UAME)和庚醛(HEP)的高效连续生产。考察了进料方式、反应温度和预热温度对微波辅助热解的影响。采用雾化进料，在500℃的反应温度和150℃的预热温度下，HEP和UAME的最大选择性分别达到91.4wt.%和76.6wt.%。用气相色谱(GC)、气相色谱-质谱仪(GC-MS)和傅立叶变换红外光谱(FT-IR)对产物进行了分析，气产率、液产率和固体产率分别达到7.0wt.%、89.0wt.%和0.1wt.%，在500℃时误差为3.9wt.%。微波辅助加热与雾化进料相结合的热解工艺比传统热解工艺更有效。另外，在500℃时，MAP的理论热为1461kJ/kg，实际热为2629kJ/kg。材料平衡和热分析结果可用于指导放大装置的设计。
A stable high-temperature reaction site and the uniformity and speed of heating the feedstocks play a key role in pyrolysis processes. In this study, microwave-assisted heating coupled with atomization feeding was used to pyrolyze methyl ricinoleate (MR) for the efficient, continuous production of undecylenic acid methyl ester (UAME) and heptanal (HEP). The effects of feed mode, reaction temperature and preheating temperature on microwave-assisted pyrolysis (MAP) were examined. The maximum selectivities of HEP and UAME could reach 91.4 wt.% and 76.6 wt.%, respectively, at the reaction and preheating temperatures of 500 degrees C and 150 degrees C, respectively, using atomization feeding. The gas, liquid and solid products were determined by gas chromatography (GC), GC-mass spectrometry (MS) and Fourier transform infrared (FT-IR), and the gas, liquid and solid yield reached 7.0 wt.%, 89.0 wt.% and 0.1% wt.%, respectively, with an error of 3.9 wt.% at 500 degrees C. The pyrolysis of MR via microwave-assisted heating coupled with atomization feeding was found to be more efficient than the conventional pyrolysis process. In addition, the theoretical and actual heat for MAP of MR was 1461 kJ/kg and 2629 kJ/kg at 500 degrees C, respectively. The material balance and heat analysis results can be used to guide the design of an amplifying device.