Amine solution regeneration by enhanced carbon dioxide desorption over modified HZSM-5 catalyst

Name: Jirada Pawachad

Organization : Chulalongkorn University. Faculty of Science

Email : 6570020223@student.chula.ac.th

Name: Prasert Reubroycharen

Organization : Chulalongkorn University. Faculty of Science

Name: Idem, Raphael

Organization : University of Regina. Faculty of Engineering & Applied Science

Name: Paweesuda Natewong

Organization : University of Regina. Faculty of Engineering & Applied Science

keyword: Catalysts, Solid

LCSH: Carbon dioxide -- Absorption and adsorption

; Amine scrubbing process

LCSH: Greenhouse gases

LCSH: Zeolites

LCSH: Energy consumption

Abstract: Increasing atmospheric carbon dioxide (CO₂) is a major contributor to global warming and the greenhouse effect. Amine absorption is the most widely used industrial technique for CO₂ capture, but the energy-intensive desorption process poses a challenge. HZSM-5, a solid acid catalyst, is commonly used in primary amine regeneration but is limited by its microporous structure. This study focuses on enhancing CO₂ capture efficiency by modifying HZSM-5 through a dealumination re-assembly method using varying concentrations of ammonium bifluoride (NH₄HF₂) in a 5M MEA solution. Results indicate that HZSM-5 modified with 0.6M NH₄HF₂ demonstrates superior performance. It significantly increases the CO₂ desorption rate at low temperatures (~90°C) while reducing heat duty by 40%. These improvements are attributed to the larger mesoporous surface area and optimized acid site properties, characterized by BET and NH₃-TPD analyses. Additionally, XRD analysis confirms the zeolite's crystallinity remains intact, highlighting the mild nature of the NH₄HF₂ reaction. This novel catalyst design approach improves the desorption process's energy efficiency, making it a promising solution for CO₂ capture technologies. Structural modifications of HZSM-5 offer a pathway to enhance catalytic performance, addressing industrial energy demands effectively.

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Created: 2025

Modified: 2025-10-22

Issued: 2025-10-22

บทความ/Article

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BibliograpyCitation : In The Chemical Society of Thailand under the Patronage of Professor Dr. Her Royal Highness Princess Chulabhorn Krom Phra Srisavangavadhana and Suranaree University of Technology. Institute of Science. School of Chemistry. Pure and Applied Chemistry International Conference 2025 (PACCON 2025) (pp.145-149). Bangkok : The Chemical Society of Thailand under the Patronage of Professor Dr. Her Royal Highness Princess Chulabhorn Krom Phra Srisavangavadhana in association with the School of Chemistry, Institute of Science, Suranaree University of Technology, 2025

eng

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