Abstract In this study, microwave-assisted co-pyrolysis of high ash Indian coal and rice husk is investigated to evaluate the yield and quality of the pyrolysis oil, and to understand the interactions during co-pyrolysis. Microwave co-pyrolysis experiments were conducted in a bench scale unit, and the effects of various parameters such as microwave power (420 W and 560 W), coal:rice husk ratio, and feed:susceptor (graphite) ratio on product yields and oil composition were thoroughly evaluated. Oil yield was not significantly affected by microwave power and feed:susceptor ratio for a particular coal:rice husk ratio. The oil yields were 11 ± 2 wt%, 15 ± 2 wt%, 18 ± 2 wt%, 21 ± 2 wt% and 26 ± 2 wt% for 100:0, 75:25, 50:50, 25:75 and 0:100 wt./wt. coal:rice husk, respectively, at both microwave powers, and followed an additive effect with increase in rice husk amount in the mixtures. Pyrolysis oil contained monoaromatic hydrocarbons, naphthalene derivatives, aliphatic hydrocarbons and phenolic derivatives. The interactions between coal and rice husk pyrolysis intermediates were evidenced in the form of enhanced yields of polyaromatic hydrocarbons with a concomitant reduction in yield of methoxy phenols. Pyrolysis oil from coal had highest heating value (36–38 MJ kg −1 ) due to the presence of aliphatic hydrocarbons, while that from rice husk had the lowest heating value (28–30 MJ kg −1 ) due to high oxygenate content. The heating values of co-pyrolysis oils were in the range of 30–36 MJ kg −1 . Hydrogen constituted a major fraction in the pyrolysis gases, and the addition of rice husk to coal promoted the evolution of CO.

中文翻译：

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高灰分印度煤和稻壳的微波辅助共热解：产品表征和相互作用的证据

摘要 本研究对高灰分印度煤和稻壳的微波辅助共热解进行了研究，以评估热解油的产量和质量，并了解共热解过程中的相互作用。微波共热解实验在实验室规模装置中进行，各种参数如微波功率（420 W 和 560 W）、煤：稻壳比和饲料：感受器（石墨）比对产品收率和油的影响成分进行了彻底的评估。对于特定的煤：稻壳比，微波功率和进料：感受器比对油产量没有显着影响。对于 100:0、75:25、50:50、25:75 和 11±2wt%、15±2wt%、18±2wt%、21±2wt% 和 26±2wt% 0:100 重量/重量 煤：稻壳，分别在两种微波功率下，并随着混合物中稻壳含量的增加而产生累加效应。热解油含有单芳烃、萘衍生物、脂肪烃和酚类衍生物。煤和稻壳热解中间体之间的相互作用以多环芳烃产率提高的形式证明，同时甲氧基苯酚的产率降低。由于脂肪烃的存在，煤热解油的热值最高（36-38 MJ kg -1 ），而稻壳热解油的热值最低（28-30 MJ kg -1 ），因为含氧量高。共热解油的热值在 30-36 MJ kg -1 的范围内。氢气是热解气体中的主要成分，向煤中添加稻壳促进了 CO 的释放。