CuO修饰的赤泥载氧体废弃活性炭化学链燃烧

doi:10.16085/j.issn.1000-6613.2017-1950

化工进展 ›› 2018, Vol. 37 ›› Issue (07): 2837-2845.DOI: 10.16085/j.issn.1000-6613.2017-1950

CuO修饰的赤泥载氧体废弃活性炭化学链燃烧

王博, 郭庆杰

青岛科技大学化工学院, 清洁化工过程山东省高校重点实验室, 山东青岛 266042

收稿日期:2017-09-18 修回日期:2017-11-07 出版日期:2018-07-05 发布日期:2018-07-05
通讯作者: 郭庆杰,教授,博士生导师,研究方向为流态化工程。
作者简介:王博(1992-),女,硕士研究生,研究方向为固体废弃物资源化处理。
基金资助:
山东省重点研发计划（2016GSF117005）、山东省自然基金重点项目（ZR2015QZ02）及国家自然科学基金（21276129）项目。

Chemical looping combustion of waste activated carbon with oxygen carrier of CuO-modified red mud

WANG Bo, GUO Qingjie

Key Laboratory of Clean Chemical Processing of Shandong Province, College of Chemical Engineering, Qingdao University of Science & Technology, Qingdao 266042, Shandong, China

Received:2017-09-18 Revised:2017-11-07 Online:2018-07-05 Published:2018-07-05

摘要/Abstract

摘要： 以拜耳法赤泥为基体，采用浸渍法制备了CuO修饰的赤泥载氧体（Cu0.5RM1、Cu1RM1）。利用SEM-EDSmapping、XRD对其进行物化表征，并在高温流化床反应器及热重分析仪中考察了赤泥载氧体的废弃活性炭化学链燃烧特性。结果表明，浸渍法可准确制备定量CuO修饰的赤泥载氧体；相比于纯赤泥载氧体，CuO修饰的赤泥载氧体具有化学链燃烧载氧体与化学链氧解耦燃烧载氧体的双重特性，能够加快碳转化速率，有效提高出口气体中CO₂浓度；Cu1RM1反应活性较高，875℃为其较优的反应温度，此时t₉₅为28min，出口气体中CO₂浓度为92.9%（体积分数），燃烧效率达93.0%。10次循环实验表明Cu1RM1载氧体具有相对稳定的循环反应特性。

关键词: 赤泥载氧体, CuO修饰, 废弃活性炭, 化学链燃烧, 循环实验

Abstract: CuO-modified red mud oxygen carriers (Cu0.5RM1, Cu1RM1) were prepared by impregnation method and characterized by SEM-EDS mapping and XRD. The reactivity of red mud oxygen carrier in chemical looping combustion (CLC), with waste activated carbon (WAC) as raw material, was evaluated in a high-temperature bench fluidized-bed reactor and thermogravimetric analyzer (TGA). The results of SEM-EDS mapping showed that impregnation method was a desirable approach for preparing quantitative CuO-modified red mud oxygen carriers. CuO-modified red mud oxygen carriers were demonstrated to act as both CLC oxygen carrier and chemical looping with oxygen uncoupling oxygen carrier. Furthermore, WAC conversion rate and CO₂ concentration were significantly enhanced in comparison to pure red mud oxygen carriers. Additionally, it was found that Cu1RM1, due to the higher CuO loading, performed higher reactivity than Cu0.5RM1. Under the optimum temperature of 875℃, the CO₂ average concentration of 92.9%, the combustion efficiency of 93.0% and the residence time (t₉₅) of 28min were achieved. Moreover, Cu1RM1 had a good stability during the 10 redox tests.

Key words: red mud oxygen carrier, CuO-modified, waste activated carbon, chemical looping combustion, redox test

中图分类号:

王博, 郭庆杰. CuO修饰的赤泥载氧体废弃活性炭化学链燃烧[J]. 化工进展, 2018, 37(07): 2837-2845.

WANG Bo, GUO Qingjie. Chemical looping combustion of waste activated carbon with oxygen carrier of CuO-modified red mud[J]. Chemical Industry and Engineering Progress, 2018, 37(07): 2837-2845.

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CuO修饰的赤泥载氧体废弃活性炭化学链燃烧

Chemical looping combustion of waste activated carbon with oxygen carrier of CuO-modified red mud

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