Premium
Catalytic solvent regeneration of a CO 2 ‐loaded MEA solution using an acidic catalyst from industrial rough metatitanic acid
Author(s) -
Li Lijun,
Liu Yingying,
Wu Kejing,
Liu Changjun,
Tang Siyang,
Yue Hairong,
Lu Houfang,
Liang Bin
Publication year - 2020
Publication title -
greenhouse gases: science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.45
H-Index - 32
ISSN - 2152-3878
DOI - 10.1002/ghg.1839
Subject(s) - catalysis , desorption , chemistry , thermogravimetry , solvent , adsorption , calcination , lewis acids and bases , thermal desorption spectroscopy , inorganic chemistry , nuclear chemistry , chemical engineering , organic chemistry , engineering
Ethanolamine (MEA) solution is the most commonly used commercial chemical absorbent in conventional CO 2 postcombustion processes; however the high heat duty and reaction temperature (e.g. 125°C) for solvent regeneration leads to high energy requirements (approximately 70–80% of the total running cost). This paper reports a catalytic solvent regeneration of a CO 2 ‐loaded MEA solution using industrial calcined rough metatitanic acid (TiO(OH) 2 ) as the catalyst to improve the CO 2 desorption rate and reduce the regeneration temperature to 95°C. The catalytic reaction parameters were systematically investigated with an improvement in the CO 2 desorption rate of 28.9% in comparison with the non‐catalytic process. The results of characterization, such as the thermogravimetry analysis, X‐ray diffraction, N 2 adsorption‐desorption, pyridine‐infrared spectroscopy (Py‐IR), showed that the Lewis acid of the industrial metatitanic acid played a major role in the decomposition of carbamate and in enhancing the regeneration rate of MEA solvent in a CO 2 ‐rich MEA solution. © 2018 Society of Chemical Industry and John Wiley & Sons, Ltd.