Reducing Heat Duty of MEA Regeneration Using a Sulfonic Acid-Functionalized Mesoporous MCM-41 Catalyst

• DOI: 10.1021/acs.iecr.1c03671
• Publication Date: 2021-12-13T06:52:46Z
• Authors: Qiang Sun; Tianhao Li; Yu Mao; Hongxia Gao; Teerawat Sema; Shengyu Wang; Libin Liu; Zhiwu Liang
• Keywords: Sulfonic acid; Thermal desorption

Amine-based CO2 capture is a promising method to limit global emissions. However, large thermal energy consumption for desorption during amine regeneration has limited large-scale worldwide applications. Here, we show that an efficient MCM-41-SO3H-0.6 catalyst presented superior catalytic performance, decreasing the relative heat duty by one-third and enhancing instantaneous rate up 195% in comparison with monoethanolamine (MEA) without catalysts. The excellent activity related combination of properties mesopore surface area × total acid sites, possible mechanism proposed MCM-41-SO3H Furthermore, experimental results MEA solution process were consistent density functional theory calculations revealing mechanism. This work demonstrated MCM-41 functionalized sulfonic group catalysts could play essential role post-combustion technology using aqueous industrial