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烟气脱硫废弃物中的石膏矿化Lye介质在试点规模的烟气脱硫

Yuliang Cao^1,2, Tingfeng Liu^1,2, Guodong Chen^1,2

¹School of Mechanical Engineering, Nanjing Institute of Technology, Nanjing, 211167, Jiangsu, China.

Scientific reports

|May 21, 2025

概括

烟气脱硫石膏有效地矿化废物溶液中的二氧化碳 (CO2),实现高效率. 这项试点规模的研究优化了二氧化碳捕获和废物利用的条件.

科学领域:

环境化学环境化学
化学工程是化学工程的重要组成部分.
材料科学材料科学材料科学

背景情况:

大气温度的上升和二氧化碳排放的增加凸显了对有效的碳捕获,利用和封存 (CCUS) 技术的需求.
烟气脱硫石膏 (FGDG) 是固体废物产品,为二氧化碳矿化提供了一个机会.
废 NaOH 溶液是促进二氧化碳捕获反应的潜在介质.

研究的目的:

通过试点规模的泡塔,研究FGDG在废弃NaOH溶液中的CO2矿化效率.
评估操作参数 (离子强度,二氧化碳流量,温度,液位) 对矿化效率和产品性能的影响.
展示燃煤发电厂的综合废物利用战略.

主要方法:

为了研究二氧化碳矿化,进行了试点规模的泡塔实验.
热重力测量分析 (TGA),X射线衍射 (XRD),扫描电子显微镜 (SEM) 和颗粒大小分析被用来描述矿化产品.
系统地改变离子强度,二氧化碳流量,反应温度和液体水平以确定最佳条件.

主要成果:

离子强度,反应温度和二氧化碳流量率显著影响了二氧化碳矿化效率.
在优化条件下 (离子强度:10−2 mol·L−1,CO2流量:20 L·h−1,温度60°C,液位50厘米) 的CO2矿化效率为92.15%.
较高的液体水平促进了较小的碳酸晶体的形成.

结论:

在废弃的NaOH溶液中使用FGDG的CO2矿化是一种高效的试点规模的工艺.
该研究提供了优化的参数,以最大限度地减少二氧化碳和矿产产品的形成.
这种方法提供了一种可行的方法,可以全面利用燃煤发电厂的废气,液体和固体流.

关键词:

二氧化碳矿物化的过程.烟气脱硫石膏 (FGDG) 的使用方法试点规模反应堆的试点规模反应堆.废物 Lye 的废物

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