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Biochar-based adsorbents for carbon dioxide capture: A critical review

Authors
Dissanayake, Pavani DulanjaYou, SimingIgalavithana, Avanthi DeshaniXia, YinfengBhatnagar, AmitGupta, SouradeepKua, Harn WeiKim, SuminKwon, Jung-HwanTsang, Daniel C. W.Ok, Yong Sik
Issue Date
3월-2020
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Keywords
Black carbon; CO2 capture; Climate change; Engineered biochar; Greenhouse gas
Citation
RENEWABLE & SUSTAINABLE ENERGY REVIEWS, v.119
Indexed
SCIE
SCOPUS
Journal Title
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
Volume
119
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/57542
DOI
10.1016/j.rser.2019.109582
ISSN
1364-0321
Abstract
Carbon dioxide (CO2) is the main anthropogenic greenhouse gas contributing to global warming, causing tremendous impacts on the global ecosystem. Fossil fuel combustion is the main anthropogenic source of CO2 emissions. Biochar, a porous carbonaceous material produced through the thermochemical conversion of organic materials in oxygen-depleted conditions, is emerging as a cost-effective green sorbent to maintain environmental quality by capturing CO2. Currently, the modification of biochar using different physico-chemical processes, as well as the synthesis of biochar composites to enhance the contaminant sorption capacity, has drawn significant interest from the scientific community, which could also be used for capturing CO2. This review summarizes and evaluates the potential of using pristine and engineered biochar as CO2 capturing media, as well as the factors influencing the CO2 adsorption capacity of biochar and issues related to the synthesis of biochar-based CO2 adsorbents. The CO2 adsorption capacity of biochar is greatly governed by physico-chemical properties of biochar such as specific surface area, microporosity, ammaticity, hydrophobicity and the presence of basic functional groups which are influenced by feedstock type and production conditions of biochar. Micropore area (R-2 = 0.9032, n = 32) and micropore volume (R-2 = 0.8793, n = 32) showed a significant positive relationship with CO2 adsorption capacity of biochar. These properties of biochar are closely related to the type of feedstock and the thermochemical conditions of biochar production. Engineered biochar significantly increases CO2 adsorption capacity of pristine biochar due to modification of surface properties. Despite the progress in biochar development, further studies should be conducted to develop cost-effective, sustainable biochar-based composites for use in large-scale CO2 capture.
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생명과학대학 (환경생태공학부)
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