Detailed Record


Mesoporous MgO enriched in Lewis base sites as effective catalysts for efficient CO2 capture


Abstract Capturing CO2 has become increasingly important. However, wide industrial applications of conventional CO2 capture technologies are limited by their slow CO2 sorption and desorption kinetics. Accordingly, this research is designed to overcome the challenge by synthesizing mesoporous MgO nanoparticles (MgO-NPs) with a new method that uses PEG 1500 as a soft template. MgO surface structure is nonstoichiometric due to its distinctive shape; the abundant Lewis base sites provided by oxygen vacancies promote CO2 capture. Adding 2 wt % MgO-NPs to 20 wt % monoethanolamine (MEA) can increase the breakthrough time (the time with 90% CO2 capturing efficiency) by ∼3000% and can increase the CO2 absorption capacity within the breakthrough time by ∼3660%. The data suggest that MgO-NPs can accelerate the rate and increase CO2 desorption capacity by up to ∼8740% and ∼2290% at 90 °C, respectively. Also, the excellent stability of the system within 50 cycles is verified. These findings demonstrate a new strategy to innovate MEA absorbents currently widely used in commercial post-combustion CO2 capture plants.
Authors Lei Wang ORCID , Yi Yao University of WyomingORCID , Trinh Tran , Patrick Lira ORCID , Steven Sternberg , Richard A. Davis ORCID , Zhao Sun ORCID , Qinghua Lai University of Wyoming , Sam Toan ORCID , Jianmin Luo ORCID , Yudai Huang ORCID , Yun Hang Hu ORCID , Maohong Fan University of WyomingORCID
Journal Info Elsevier BV | Journal of Environmental Management , vol: 332 , pages: 117398 - 117398
Publication Date 4/1/2023
ISSN 0301-4797
TypeKeyword Image article
Open Access bronze Bronze Access
DOI https://doi.org/10.1016/j.jenvman.2023.117398
KeywordsKeyword Image CO2 Capture (Score: 0.630268) , CO2 Capture Technology (Score: 0.610136) , Carbon Dioxide Capture (Score: 0.571767) , CO2 Separation (Score: 0.521532) , Gas Adsorption (Score: 0.511384)