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基于高氧化物修改的高氧化物基吸收剂颗粒用于增强高温CO2捕获

Yun Long¹, Quan Gu¹, Changqing Wang¹

¹State Key Laboratory of Coal Combustion, School of Power and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China.

Small (Weinheim an der Bergstrasse, Germany)

|August 10, 2024

概括

这项研究引入了一种新型高氧化 (HEFO) 稳定剂,以增强二氧化碳捕获的循环. 经过HEFO修饰的吸附剂显示出卓越的循环稳定性和二氧化碳捕获能力,克服了基于氧化的材料中的烧结问题.

科学领域:

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

背景情况:

循环对于使用氧化 (CaO) 基吸附剂从烟气中捕获二氧化碳至关重要.
酸吸附剂的热力学稳定性和烧结性较低,限制了它们的循环性能.

研究的目的:

开发一种新型的高氧化 (HEFO) 稳定剂,以提高CaO基吸附剂的抗化性能和循环稳定性.
研究HEFO修饰的CaO吸收颗粒的合成和性能,以提高二氧化碳的捕获.

主要方法:

合成HEFO修饰的CaO Sorbent颗粒,使用快速的烟辅助燃烧过程和石墨成型.
通过多个捕获-再生周期评估二氧化碳捕获能力和周期稳定性.
对形态,晶体和结合能量的变化进行分析,以了解反化机制.

主要成果:

高氧化物 (HEFO) 修改显著提高了CaO基吸附剂的抗化性能和循环稳定性.
二氧化碳捕获能力达到0.373gg-1,比纯CaO提高了2.6倍.
由于HEFO的稳定性和强大的CaO亲和力 (-1.83 eV的界面结合能量),限制了CaO的迁移和烧结.
高氧化的协同效应降低了能源障碍,使碳化和化率分别增加了40%和140%.

结论:

快速合成的HEFO改性CaO吸收颗粒提供了卓越的CO2捕获性能和循环稳定性.
高氧化稳定剂有效地减轻了基于CaO的吸附剂中的烧结问题.
这些吸附剂显示出在二氧化碳捕获技术中的工业应用的巨大潜力.

关键词:

捕获二氧化碳的方法基于CaO的吸附剂颗粒.具有高的化氧化物.反应动力学反应动力学烧结阻力烧结阻力烧结阻力

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