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在分离-氧化-酸洗 (SOA) 过程后,煤炭气化渣中的环境影响和碳回收

Yuhan Long¹, Haoying Zhang¹, Hanzhao Yang¹

¹Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China.

Journal of environmental management

|January 4, 2025

概括

这项研究引入了一种新的分离-氧化-酸洗 (SOA) 工艺,用于从煤炭气化渣中去除有毒重金属. 该方法有效回收剩余碳 (RC),并大大降低了与CGS相关的环境风险.

科学领域:

环境科学环境科学
废物管理废物管理
化学工程是化学工程的重要组成部分.

背景情况:

煤气化废渣 (CGS) 由于有毒重金属而带来重大环境和健康风险.
目前对CGS的处置和再利用限制阻碍了固体废物资源利用.

研究的目的:

开发一种环保的方法来从CGS中去除重金属.
通过回收剩余碳 (RC) 来实现CGS的资源利用.
在CGS上研究分离-氧化-酸洗 (SOA) 过程的有效性.

主要方法:

一种新的分离-氧化-酸洗 (SOA) 工艺被应用于CGS.
在处理后分析了重金属的化学形态,漏模式和环境风险.
测量了点火损失 (LOI),以评估剩余碳回收.

主要成果:

在SOA过程中,Sb,Pb和As从细CGS中获得了高的去除率 (高达88.6%),Sb,As和Ni从粗CGS中获得了高的去除率 (高达63.24%).
重金属的风险评估代码 (RAC) 和相对漏率 (RLR) 显著降低,表明环境风险较低.
处理后的点火损失 (LOI) 超过45%,证实了有效的剩余碳回收.

结论:

SOA工艺是从CGS中去除重金属的有效和环保策略.
这种方法显著减轻了CGS中重金属的环境风险和漏潜力.
该过程通过剩余碳回收提高了煤炭气化企业的资源利用率.

关键词:

碳残留物的回收利用煤炭气化废渣是煤炭气化的废渣.环境风险评估环境风险评估重金属的去除重金属的去除.资源利用情况资源利用情况

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