A computational study of the effects of multiphase dynamics in catalytic upgrading of biomass pyrolysis vapor
A computational study of the effects of multiphase dynamics in catalytic upgrading of biomass pyrolysis vapor
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DOI：
10.1002/aic.16184
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发表时间：
2018-09
期刊：
影响因子：
3.7
通讯作者：
Himanshu Goyal;O. Desjardins;P. Pepiot;J. Capecelatro
中科院分区：
文献类型：
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作者：
Himanshu Goyal;O. Desjardins;P. Pepiot;J. Capecelatro
现有生物质转化为生物燃料的各种技术中的一个反复出现的挑战是，需要确保所涉及的各个阶段之间的最佳和同类接触。仅从经验的角度制定稳健的设计规则仍然是困难的，因为给定的反应器内共存着广泛的颗粒流型。在这项工作中，采用了体积过滤欧拉-拉格朗日框架来求解催化粒子存在下的化学反应流动。采用该模拟策略对提升管内颗粒聚集对生物质热解蒸气催化改质的影响进行了定量研究。结果表明，颗粒聚集可使生物质热解蒸气的催化转化率降低约50%。并将模拟结果与基于连续搅拌釜式反应器的工程模型进行了比较。推导了一维雷诺平均输运方程，并对团簇引起的非封闭项进行了计算。反应工程、动力学和催化AIChE期刊DOI 10.1002/AIC.16184这篇文章已被接受出版，并经过了全面的同行审查，但尚未经过复制、排版、分页和校对过程，这可能会导致该版本与记录版本之间的差异。请将本文引用为DOI：10.1002/aic.16184©2018年美国化学工程师学会(AIChE)收到日期：2017年12月13日；修订日期：2018年3月16日；接受日期：2018年4月9日。本文受版权保护。版权所有。
A recurring challenge among the variety of existing biomass-to-biofuel conversion technologies is the need to ensure optimal and homogeneous contact between the various phases involved. The formulation of robust design rules from an empirical standpoint alone remains di cult due to the wide range of granular flow regimes coexisting within a given reactor. In this work, a volume-filtered Eulerian-Lagrangian framework is employed that solves chemically reacting flows in the presence of catalytic particles. The simulation strategy is used to quantify the role of the particle clustering on catalytic upgrading of biomass pyrolysis vapor in risers. It is shown that particle clustering can reduce the catalytic conversion rate of biomass pyrolysis vapors by up to about 50%. The simulation results are also compared with an engineering model based on continuously stirred tank reactor (CSTR). A one-dimensional Reynolds-averaged transport equation is derived, and the unclosed terms that account for the heterogeneity caused by clusters are evaluated. Reaction Engineering, Kinetics and Catalysis AIChE Journal DOI 10.1002/aic.16184 This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1002/aic.16184 © 2018 American Institute of Chemical Engineers (AIChE) Received: Dec 13, 2017; Revised: Mar 16, 2018; Accepted: Apr 09, 2018 This article is protected by copyright. All rights reserved.