Microwave assisted pyrolysis of Kraft lignin in single mode high-Q resonant cavities: Degradation kinetics, product chemical composition, and numerical modeling

Nde Divine B.; Muley Pranjali D.; Sabliov Cristina M.; Nokes Sue E.; Boldor Dorin

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Microwave assisted pyrolysis of Kraft lignin in single mode high-Q resonant cavities: Degradation kinetics, product chemical composition, and numerical modeling

机译：单模高Q谐振空腔中牛皮纸木质素的微波辅助热解：降解动力学，产品化学成分和数值模拟

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Useful fuels and chemicals can be produced from lignin by microwave-assisted pyrolysis, but a dearth of understanding of this process impedes its successful implementation. Continuous mass loss kinetics of the pyrolysis of Kraft lignin pellets were carried out in an innovative reactor system comprised of a high-Q cylindrical microwave resonant cavity and a specially designed quartz reactor, in the temperature range of 300-700 ?C. Multiphysics numerical simulations indicated that both absorbed power and resulting temperatures profiles are heavily dependent on position of the sample relative to the electric field. Kraft lignin degradation (5 g samples) was complete in about 40 s, which was much faster than conventionally heated reactors. Activation energies (5-22 kJ/mol) and pre-exponential factors (0.06-0.64 s-1) were indicative that the process is low in energy consumption. At higher temperatures, phenols and phenolics were the major constituents of the bio-oil. A reliable method of obtaining microwave-assisted mass loss kinetics continuously is established.commentSuperscript/Subscript Available/comment

机译：通过微波辅助热解产生有用的燃料和化学物质可以通过微波辅助热解产生，但对这一过程的理解缺乏阻碍了其成功实施。在由高Q圆柱形微波谐振腔和专门设计的石英反应器组成的创新反应器系统中，在300-700℃的温度范围内，在包括高Q圆柱形微波谐振腔和专门设计的石英反应器的创新反应器系统中进行连续质量损失动力学。多职员数值模拟表明，吸收功率和产生的温度曲线都严重依赖于样品相对于电场的位置。牛皮纸木质素降解（5g样品）在约40秒内完成，比常规加热的反应器快得多。激活能量（5-22 kJ / mol）和预指数因子（0.06-0.64 s-1）表示该过程能耗低。在较高的温度下，酚类和酚类是生物油的主要成分。建立了获得微波辅助质量损失动力学的可靠方法。<注释>上标/下标可用

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来源
《Energy Conversion & Management》 |2021年第2期|113754.1-113754.10|共10页
作者
Nde Divine B.; Muley Pranjali D.; Sabliov Cristina M.; Nokes Sue E.; Boldor Dorin;
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作者单位

Univ Bamenda Dept Food & Bioresource Technol Coll Technol POB 39 Bamenda Cameroon|Louisiana State Univ Ctr Agr Dept Biol & Agr Engn 149 EB Doran Bldg Baton Rouge LA 70803 USA;

Louisiana State Univ Ctr Agr Dept Biol & Agr Engn 149 EB Doran Bldg Baton Rouge LA 70803 USA;

Louisiana State Univ Ctr Agr Dept Biol & Agr Engn 149 EB Doran Bldg Baton Rouge LA 70803 USA;

Univ Kentucky Dept Biosyst & Agr Engn Lexington KY USA;

Louisiana State Univ Ctr Agr Dept Biol & Agr Engn 149 EB Doran Bldg Baton Rouge LA 70803 USA;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
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关键词
Kraft lignin; Pyrolysis; Microwave; Mass loss kinetics; Numerical modelling;

机译：牛皮油木质素;热解;微波;质量损失动力学;数值建模;

Microwave assisted pyrolysis of Kraft lignin in single mode high-Q resonant cavities: Degradation kinetics, product chemical composition, and numerical modeling

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