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矿氧载体与富含铁的污泥灰产生协同作用的晶格氧释放特征

Kun Wang¹, Wenzheng Liang¹, Sheng Yao¹

¹Clean Energy Lab, Shandong University of Science and Technology, Qingdao, Shandong Province 266590, PR China.

Waste management (New York, N.Y.)

|September 13, 2025

概括

污水污泥灰 (SSA) 与矿氧载体 (POC) 结合,显示出协同效应,增强氧气运输和反应性. 这种组合提高了材料的稳定性,并为污泥处理中的化学循环技术提供了潜力.

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:

基于铁的氧载体 (OCs) 对化学循环技术至关重要.
污水污泥灰 (SSA) 是一种富含氧化铁的废物,类似于OCs.
研究OCs和SSA之间的协同效应对于废物利用和过程改进至关重要.

研究的目的:

评估矿氧载体 (POC) 和污水污泥灰 (SSA) 对氧气输送和还原动力学的协同效应.
为了确定SSA与POC混合是否增强氧气释放并稳定氧气载体.
探索这种协同作用在污泥处理的化学循环技术中的潜在应用.

主要方法:

热重力测量分析 (TGA) 用于研究晶格氧释放和减少动力学.
实验使用工业制备的CaMn0.5Fe0.5O3-δ矿OCs (POC),SSA和1:1的POC/SSA混合物进行.
用不同的度 (5-25%) 和终端温度 (800-900°C) 来分析不同条件下的性能.

主要成果:

混合物 (POC/SSA) 显示出显著的协同效应,特别是在低温 (800°C) 和高度 (25%H2) 的情况下.
混合样本减少的激活能量 (Ea) 比理论值低 (46.135 kJ/mol),表明反应能力提高.
SSA显著增加了POC的特定表面积 (从14.28到137.6m2/g) 和孔积,改善了反应性能.

结论:

在SSA和POC之间存在积极的协同效应,增强氧气运输和稳定氧气载体.
优化的氧气迁移路径和增加的表面积有助于提高POC/SSA混合物的反应性.
这项研究表明,在高效的化学循环应用中,特别是污泥处理中,将SSA与OC结合使用SSA的潜力.

关键词:

动态分析动态分析氧气释放释放的氧气.佩洛夫斯基特是一种矿.污泥灰灰是什么意思污泥灰是什么意思协同作用的相互作用是协同作用的相互作用.

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