| Title: | Adsorption behavior of multicomponent volatile organic compounds on a citric acid residue waste-based activated carbon: Experiment and molecular simulation |
| Author(s): | Yao X; Liu Y; Li T; Zhang T; Li H; Wang W; Shen X; Qian F; Yao Z; |
| Address: | "Department of Environmental Science and Engineering, Beijing Technology and Business University, Beijing 100048, China; Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry, Beijing Technology and Business University, Beijing 100048, China. College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China. School of Energy Science and Engineering, Central South University, Changsha, 410083, China. State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xi'ning, Qinghai Province 810016, China. Department of Environmental Science and Engineering, Beijing Technology and Business University, Beijing 100048, China; Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry, Beijing Technology and Business University, Beijing 100048, China. Electronic address: yaozhl@th.btbu.edu.cn" |
| DOI: | 10.1016/j.jhazmat.2020.122323 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "A considerable amount of volatile organic compounds (VOCs) is emitted, and a vast amount of citric acid residue (CAR) waste is simultaneously produced during citric acid production. Thus, a suitable method realizing the clean production of citric acid must be developed. This study investigated the adsorption of the multicomponent VOCs in a homemade CAR waste-based activated carbon (CAR-AC). A fixed-bed experimental setup was used to explore the adsorption and desorption of single- and multi-component VOCs. Surface adsorption and diffusion molecular models with different defects were built to study the underlying adsorption and diffusion mechanisms of multicomponent VOCs on CAR-AC. The adsorption amount of ethyl acetate in CAR-AC from multicomponent VOCs was 3.04 and 5.91 times higher than those of acetone and acetaldehyde, respectively, and the interaction energy between ethyl acetate and C surfaces was low at -13.41?ª+kcal/mol. During desorption, the most weakly adsorbed acetaldehyde desorbed from the surface of CAR-AC first, followed by acetone and ethyl acetate. The regeneration efficiencies of acetaldehyde, acetone, and ethyl acetate reached 88.77, 85.55, and 91.46 %, respectively, after four adsorption/desorption cycles. We aimed to provide a new strategy to realize the recycle use of CAR and the clean production of citric acid" |
| Keywords: | Adsorption Citric acid residue waste-based activated carbon Molecular simulation Multicomponent volatile organic compounds; |
| Notes: | "PubMed-not-MEDLINEYao, Xiaolong Liu, Yao Li, Tong Zhang, Tingting Li, Hailong Wang, Wei Shen, Xianbao Qian, Feng Yao, Zhiliang eng Research Support, Non-U.S. Gov't Netherlands 2020/02/26 J Hazard Mater. 2020 Jun 15; 392:122323. doi: 10.1016/j.jhazmat.2020.122323. Epub 2020 Feb 15" |
