燃烧和反应

Numerical Study on the Process of Chemical Looping Hydrogen Production with Multiple Circulating Fluidized Bed Reactors

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  • 1. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China
    2. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310058, China

网络出版日期: 2023-10-24

基金资助

Authors thank to the National Key Research and Development Plan (No. 2017YFE0112500), State Key Laboratory of Clean Energy Utilization (Open Fund Project No. ZJUCUE2022018), National Natural Science Foundation of China (No. 51806192).

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2023

Numerical Study on the Process of Chemical Looping Hydrogen Production with Multiple Circulating Fluidized Bed Reactors

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  • 1. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China
    2. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310058, China

Online published: 2023-10-24

Supported by

Authors thank to the National Key Research and Development Plan (No. 2017YFE0112500), State Key Laboratory of Clean Energy Utilization (Open Fund Project No. ZJUCUE2022018), National Natural Science Foundation of China (No. 51806192).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2023

摘要

氢能具有转化效率高、污染排放低的特点,利用化学链技术可以实现低能耗制氢和二氧化碳同步捕集,化学链制氢系统通常包括空气反应器、水蒸气反应器和燃料反应器三个部分,本文将关注化学链制氢系统中各反应器的运行特性,通过数值模拟手段获得系统中的固相流动规律,计算结果表明L阀对系统的固体循环量影响最大,加大L阀中松动风流速可以提升颗粒流量,L阀可以有效阻断反应器间的气体泄漏。燃料反应器具有最大颗粒储存能力,增加水蒸气反应器流化气速会降低水蒸气反应器中床料量,这些颗粒最终会贮存到燃料反应器中。通过对燃料反应器和L阀的联动调控,能够实现化学链制氢系统的稳定运行和床料控制。

本文引用格式

SUN Liyan, YIN Fan, CAO Jialei, GAO Zixiang, XIAO Rui, WANG Haiou . Numerical Study on the Process of Chemical Looping Hydrogen Production with Multiple Circulating Fluidized Bed Reactors[J]. 热科学学报, 2023 , 32(5) : 1945 -1954 . DOI: 10.1007/s11630-023-1872-1

Abstract

Hydrogen is an attractive energy carrier due to the high conversion efficiency and low pollutant emission. Chemical looping hydrogen production (CLHP) is an available way for producing high purity hydrogen with relatively low penalty energy and CO2 is captured simultaneously. Three reactors are usually contained for CLHP system including air reactor (AR), fuel reactor (FR) and steam reactor (SR). In current work, we focus on the performance of CLHP system, which is the basement for operation and design. Numerical simulations are carried out for analyzing the flow behavior and the numerical structure is built according to the experimental unit constructed at Southeast University, China. Results show that the operation of L-valve influences most the solid circulating rate of system and particles pass L-valve easily with large aeration rate. Mass distribution results indicate that fuel reactor has the capacity for particles storage. Increase of gas inlet rate of steam reactor leads to more particles leave steam reactor and accumulate into fuel reactor. L-valve can prevent the gas leakage between reactors and it will be adopted for reactive unit. Combining the operation of fuel reactor and L-valve, the system can reach steady state and get the regulating ability.

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