Effect of moisture on the heat capacity and the regeneration heat required for CO2 capture process using PEI impregnated mesoporous precipitated silica. Issue 1 (14th April 2014)

• Record Type: Journal Article
• Authors: Quang, Dang Viet; Dindi, Abdallah; Rayer, Aravind V; Hadri, Nabil El; Abdulkadir, Abdurahim; Abu‐Zahra, Mohammad R.M.
• Is Part Of: Greenhouse gases. Volume 5:Issue 1(2015:Feb.)
• Page Start: 91
• Page End: 101
• Publication Date: 2014-04-14
• Subjects: Greenhouse gases -- Periodicals; Greenhouse gas mitigation -- Periodicals; 363.7387405
• DOI: 10.1002/ghg.1427
• Languages: English
• ISSNs: 2152-3878

Abstract

<abstract abstract-type="main"> <title>Abstract</title> <p>In this study, we report the effect of the moisture of polyethylenimine (PEI) impregnated mesoporous precipitated silica used for CO₂ adsorption on the heat capacity and the heat required to regenerate the adsorbent. The results indicate that the heat capacity of the absorbent increases as its moisture content increases. The increase in moisture results in the rise of the vaporization heat of water and the elevated heat capacity results in higher sensible heat. For these reasons, the total regeneration heat required for CO₂ capture process increases significantly. The adsorbent has a maximum CO₂ adsorption capacity at 75 °C. CO₂ capture process using PEI impregnated mesoporous precipitated silica requires a minimum energy to regenerate the adsorbent; it reduces 46% of the energy compared to a process using an aqueous MEA 30 wt%, as the process operates at 75 °C.</p> </abstract>