Abstract 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 °C and 150 °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 °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 °C, respectively. The material balance and heat analysis results can be used to guide the design of an amplifying device.

中文翻译：

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微波辅助加热雾化进料热解蓖麻油酸甲酯

摘要 稳定的高温反应位点以及加热原料的均匀性和速度在热解过程中起着关键作用。在这项研究中，微波辅助加热与雾化进料相结合，用于热解蓖麻油酸甲酯 (MR)，以高效、连续地生产十一碳烯酸甲酯 (UAME) 和庚醛 (HEP)。考察了进料方式、反应温度和预热温度对微波辅助热解（MAP）的影响。HEP和UAME的最大选择性分别在500°C和150°C的反应和预热温度下使用雾化进料分别达到91.4 wt.%和76.6 wt.%。气体、液体和固体产物通过气相色谱 (GC)、GC-质谱 (MS) 和傅里叶变换红外 (FT-IR) 测定，气体、液体和固体产率分别达到 7.0 wt.%、89.0 wt.% 和 0.1% wt.%，在 500 °C 时误差为 3.9 wt.%。发现通过微波辅助加热与雾化进料相结合的 MR 热解比传统的热解过程更有效。此外，MR MAP 的理论和实际热量在 500 °C 时分别为 1461 kJ/kg 和 2629 kJ/kg。材料平衡和热分析结果可用于指导放大装置的设计。分别。材料平衡和热分析结果可用于指导放大装置的设计。分别。材料平衡和热分析结果可用于指导放大装置的设计。