Detailed Information

Cited 0 time in webofscience Cited 0 time in scopus
Metadata Downloads

Sustainable gasification biochar as a high efficiency adsorbent for CO2 capture: A facile method to designer biochar fabrication

Authors
Dissanayake, Pavani DulanjaChoi, Seung WanIgalavithana, Avanthi DeshaniYang, XiaoTsang, Daniel C. W.Wang, Chi-HwaKua, Harn WeiLee, Ki BongOk, Yong Sik
Issue Date
5월-2020
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Keywords
Black carbon; Engineered biochar; Charcoal; Gas sorption and separation; Waste valorization and sustainability; Sustainable waste management
Citation
RENEWABLE & SUSTAINABLE ENERGY REVIEWS, v.124
Indexed
SCIE
SCOPUS
Journal Title
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
Volume
124
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/56130
DOI
10.1016/j.rser.2020.109785
ISSN
1364-0321
Abstract
Biochars can be a potential means of CO2 capture if designed with hierarchical structures and suitable surface properties. Objective of this research was to assess the effectiveness of KOH activation and a combination of KOH and CO2 activation for enhancing the CO2 adsorption capacity of gasification biochar. Biochars were produced with either 100% wood chips (W) or a mixture of 70% wood chips and 30% chicken manure (WCM) through gasification, and then activated using either 1 M KOH (sample label appended with "K") or 1 M KOH and 500 mL CO2 min(-1) at 850 degrees C (sample label appended with "KC"). The pristine and activated biochars were evaluated in terms of physicochemical properties, CO2 adsorption capacity at 25 degrees C, adsorption kinetics, and regeneration ability. The WCMK biochar exhibited the highest CO2 adsorption capacity (2.92 mol/kg) with highest surface area (1408 m(2)/g), micropore area (690.18 m(2)/g), and micropore volume (0.36 cm(3)/g). WKC and WK showed comparable CO2 adsorptions, both of which were lower than that of WCMK. Both WCMK and WKC showed considerable selectivity for CO2 over N-2, fast adsorption and excellent regeneration abilities over 10 consecutive adsorption-desorption cycles. Activation of biochar, either with KOH or KOH thorn CO2, enhanced its CO2 adsorption capacity due to an increase in surface area and microporosity, irrespective of the feedstock type. However, hydrophobicity, and aromaticity of biochar and presence of hetero atoms (N and S) also positively influenced CO2 adsorption capacity of biochar. Both KOH and KOH thorn CO2 activation will be promising options for enhancing CO2 adsorption capacity of pristine biochar irrespective of the feedstock type.
Files in This Item
There are no files associated with this item.
Appears in
Collections
College of Engineering > Department of Chemical and Biological Engineering > 1. Journal Articles
College of Life Sciences and Biotechnology > Division of Environmental Science and Ecological Engineering > 1. Journal Articles

qrcode

Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Researcher Lee, Ki Bong photo

Lee, Ki Bong
공과대학 (화공생명공학과)
Read more

Altmetrics

Total Views & Downloads

BROWSE