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Detailed kinetic mechanism of gas-phase reactions of volatiles released from biomass pyrolysis

机译：生物质热解释放出的挥发物的气相反应的详细动力学机理

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摘要

Comprehensive chemical models to describe the behavior of biomass pyrolysis, gasification and combustion are crucial for the simulation and design of thermochemical processes of ligno-cellulosic materials. Despite this importance, reliable and predictive models are still not well known. The original aspect of this work is to present a comprehensive and predictive model of pyrolysis, gasification, and combustion, starting from biomass characterization, through the description of released volatiles at the particle scale, until the effect of the secondary gas-phase reactions at the reactor scale. All these aspects can play a relevant role in the biomass thermo-valorization processes. Most of released species from biomass devolatilization are oxygenated hydrocarbons. This study aims at identifying some reference rate parameters, based on analogy and thermochemistry rules, for the different reaction classes. Once rate rules are defined, they allow an easy extension to analogous compounds. In this way, the kinetic mechanism already developed for jet and diesel fuels is extended to the new tar species released by biomasses. Despite unavoidable approximations when the interest is also at the reactor scale, this model is the only one, to our knowledge, able to describe the whole process from biomass to final products, in a predictive and satisfactory way.
机译：描述生物质热解，气化和燃烧行为的综合化学模型对于木质纤维素材料热化学过程的模拟和设计至关重要。尽管具有如此重要的意义，但是可靠和可预测的模型仍然不是很了解。这项工作的最初方面是提供一个全面的，可预测的热解，气化和燃烧模型，从生物质表征开始，通过描述颗粒尺度上释放的挥发物，直到二次气相反应的影响为止。反应堆规模。所有这些方面都可以在生物质热平衡过程中发挥重要作用。生物质脱挥发分释放的大部分物质是氧化烃。这项研究旨在根据类比和热化学规则，为不同的反应类别确定一些参考速率参数。一旦定义了速率规则，就可以轻松扩展到类似化合物。这样，已经为喷气和柴油燃料开发的动力学机制扩展到了由生物质释放的新焦油物质。尽管当关注点也在反应堆规模上时不可避免地会出现近似值，但据我们所知，该模型是唯一能够以预测性和令人满意的方式描述从生物质到最终产品的整个过程的模型。

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  • 来源
    《Biomass & bioenergy》 |2016年第10期|60-71|共12页
  • 作者

    Paulo Eduardo Amaral Debiagi; Giancarlo Gentile; Matteo Pelucchi; Alessio Frassoldati; Alberto Cuoci; Tiziano Faravelli; Eliseo Ranzi;

  • 作者单位

    Dipartimento di Chimica Materiali ed Ingegneria Chimica 'G. Natta', Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy;

    Dipartimento di Chimica Materiali ed Ingegneria Chimica 'G. Natta', Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy;

    Dipartimento di Chimica Materiali ed Ingegneria Chimica 'G. Natta', Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy;

    Dipartimento di Chimica Materiali ed Ingegneria Chimica 'G. Natta', Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy;

    Dipartimento di Chimica Materiali ed Ingegneria Chimica 'G. Natta', Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy;

    Dipartimento di Chimica Materiali ed Ingegneria Chimica 'G. Natta', Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy;

    Dipartimento di Chimica Materiali ed Ingegneria Chimica 'G. Natta', Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy;

  • 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
  • 中图分类
  • 关键词

    Biomass pyrolysis; Biomass gasification; Fast pyrolysis; Lumped mechanism; Bio-oil; Tars;

    机译：生物质热解;生物质气化;快速热解;集总机制;生物油焦油;

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