Synthesis of a high-iron fly-ash-based Na-X molecular sieve and its application in the adsorption of low concentration of CO 2

作者：Jia-Xing Guo, Hong Wu, Wei Yao, Yingju Miao, Jingyuan Qu, Ping Wang · 发表于：RSC Advances · 年份：2024 · DOI：10.1039/d3ra07615f · 被引用次数：24 · 研究领域：Carbon Dioxide Capture Technologies、Heat and Mass Transfer in Porous Media、CO2 Sequestration and Geologic Interactions

, which reaches 95.11% that of the commercial Na-X molecular sieve. The adsorption breakthrough time and adsorption capacity decreased with an increase in temperature. The adsorption kinetics were consistent with the Bangham model for surface pore adsorption and Weber-Morris model for internal diffusion. During the synthesis process, iron was converted from highly dispersed iron oxide to four-coordinated framework iron. Thus, this paper paves a path for the high-quality transformation and utilization of high-iron fly-ash.