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首页> 外文期刊>Fuel >Chemical looping combustion (CLC) of two Victorian brown coals - Part 1: Assessment of interaction between CuO and minerals inherent in coals during single cycle experiment
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Chemical looping combustion (CLC) of two Victorian brown coals - Part 1: Assessment of interaction between CuO and minerals inherent in coals during single cycle experiment

机译：两种维多利亚州褐煤的化学循环燃烧（CLC）第1部分：单循环实验期间对CuO与煤中固有矿物的相互作用的评估

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摘要

In a series of two papers chemical looping combustion (CLC) of two Victorian brown coals (Loy Yang and Morwell) were investigated using CuO as oxygen carrier. The experiments were conducted using a ther-mogravimetric analyzer (TGA) under CO_2 gasification environment with CuO. This first paper reports the assessment of interaction between CuO and minerals inherent in coals during one reduction and one re-oxidation cycle experiment. The experiments were performed at two different operating temperatures of 800 ℃ and 950 ℃ Also, the time for which the CuO was exposed to experimental environment, was varied. It was observed that at 950 ℃ CuO could not be re-oxidized to its original state due to sintering that significantly altered the morphology. However, the variation of time did not impact severely on CuO performance in terms of its reactivity and oxygen transport capacity. Gain in weight during the last stage of reduction of CuO with Morwell coal was observed due to strong interaction between minerals in coal and CuO. No such evidence of interaction between Loy Yang coal minerals and CuO was observed. Hence, to further investigate this issue, experiments were undertaken using raw and acid-washed Morwell coals. As expected, no such gain in weight with acid-washed coal was observed as acid washing leached almost all the minerals in coal. The solids resulting from minerals interactions and their morphology were characterized by SEM-EDX. The presence of elements in solid residues, as predicted by thermodynamic simulations under identical experimental conditions, was similar to that observed by EDX. The part 2 of the paper describes the assessment of performance of CuO during multi-cycle experiments.
机译：在两篇论文的系列文章中，以CuO为氧载体，研究了两种维多利亚时代褐煤（Loy Yang和Morwell）的化学循环燃烧（CLC）。使用热重分析仪（TGA）在含CuO的CO_2气化环境下进行实验。该第一篇论文报道了在一次还原和一次再氧化循环实验中，CuO与煤中固有矿物之间的相互作用的评估。实验是在800℃和950℃这两个不同的工作温度下进行的。此外，CuO暴露于实验环境的时间也有所不同。观察到，在950℃时，由于烧结，CuO不能重新氧化成其原始状态，从而显着改变了形态。但是，时间的变化在反应性和氧气传输能力方面对CuO性能没有严重影响。由于煤中的矿物质与CuO之间存在强烈的相互作用，因此在用Morwell煤还原CuO的最后阶段发现了重量增加。没有观察到Loy Yang煤矿物与CuO之间相互作用的证据。因此，为了进一步研究这个问题，使用原煤和酸洗的莫韦尔煤进行了实验。不出所料，酸洗过的煤没有观察到这样的重量增加，因为酸洗几乎浸出了煤中的所有矿物。由矿物相互作用产生的固体及其形态用SEM-EDX表征。在相同的实验条件下，通过热力学模拟预测，固体残留物中元素的存在与EDX观察到的相似。本文的第2部分描述了多周期实验中CuO性能的评估。

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  • 来源
    《Fuel》 |2013年第2期|262-274|共13页
  • 作者

    Chiranjib Saha; Shuai Zhang; Klaus Hein; Rui Xiao; Sankar Bhattacharya;

  • 作者单位

    Faculty of Engineering, Department of Chemical Engineering, Monash University, Clayton Campus, Victoria 3800, Australia;

    School of Energy and Environment, Southeast University, Sipailou No. 2, Nanjing 210096, China;

    Faculty of Engineering, Department of Chemical Engineering, Monash University, Clayton Campus, Victoria 3800, Australia;

    School of Energy and Environment, Southeast University, Sipailou No. 2, Nanjing 210096, China;

    Faculty of Engineering, Department of Chemical Engineering, Monash University, Clayton Campus, Victoria 3800, Australia;

  • 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

    brown coal; chemical looping; thermogravimetric analyzer;

    机译：褐煤;化学循环热重分析仪;

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