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首页> 外文期刊>Energy >A clean coal utilization technology based on coal pyrolysis and chemical looping with oxygen uncoupling: Principle and experimental validation
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A clean coal utilization technology based on coal pyrolysis and chemical looping with oxygen uncoupling: Principle and experimental validation

机译：基于煤热解和氧气解耦化学循环的清洁煤利用技术：原理与实验验证

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摘要

The coal poly-generation system offers the possibility to produce value-added chemicals, synthetic gas fuels and electricity simultaneously, which can improve the coal utilization efficiency. To realize the multi-generation of gas, tar and heat/electricity with CO2 capture, a new clean coal utilization technology integrating coal pyrolysis and CLOU (chemical looping with oxygen uncoupling) process was proposed. Both thermodynamic process simulation and batch-scale fluidized bed CLOU experiments were conducted to verify its feasibility and obtain some fundamental features. From simulation results, the total exergy efficiency had been improved by 0.82 percent points compared to the typical coal poly-generation system. Based on CLOU experiments of two pyrolytic semicokes of SL lignite (SL-20 and SL-60), it was found that the reactor temperature and the semicoke characteristic were two key factors in determining the CLOU process, in which higher fuel reactor temperature and semicoke with shorter pyrolysis time were favorable to the conversion process. In addition, both the semicokes showed very high CO2 gas yield (higher than 99%) and relatively low unburned gas yields, whilst the combustion efficiencies reached to higher than 93%. The results suggested that SL-20 with CLOU temperature of 900 degrees C was more favorable for the operation of the new system. 2016 Elsevier Ltd. All rights reserved.
机译：煤炭多联产系统提供了同时生产增值化学品，合成气燃料和电力的可能性，这可以提高煤炭的利用效率。为了实现CO2捕集的瓦斯，焦油和热电的多代发电，提出了一种结合煤热解和CLOU（化学循环与氧解偶联）工艺的清洁煤综合利用技术。进行了热力学过程仿真和间歇式流化床CLOU实验，以验证其可行性并获得一些基本特征。从模拟结果来看，与典型的煤炭多联产系统相比，总火用效率提高了0.82个百分点。通过对SL褐煤的两种热解半焦（SL-20和SL-60）的CLOU实验，发现反应器温度和半焦特性是决定CLOU过程的两个关键因素，即较高的燃料反应器温度和半焦具有较短的热解时间有利于转化过程。此外，两种半焦均显示出很高的CO2气收率（高于99％）和相对较低的未燃烧气收率，而燃烧效率达到了93％以上。结果表明，CLOU温度为900摄氏度的SL-20更有利于新系统的运行。 2016 Elsevier Ltd.保留所有权利。

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