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ACS Appl Mater Interfaces

Title:		Reduction of Bromate by Cobalt-Impregnated Biochar Fabricated via Pyrolysis of Lignin Using CO(2) as a Reaction Medium
Author(s):		Cho DW; Kwon G; Ok YS; Kwon EE; Song H;
Address:		"Department of Environment and Energy, Sejong University , Seoul 05006, South Korea. School of Natural Resources and Environmental Science & Korea Biochar Research Center, Kangwon National University , Chuncheon 24341, South Korea"
Journal Title:		ACS Appl Mater Interfaces
Year:		2017
Volume:		20170410
Issue:		15
Page Number:		13142 - 13150
DOI:		10.1021/acsami.7b00619
ISSN/ISBN:		1944-8252 (Electronic) 1944-8244 (Linking)
Abstract:		"In this study, pyrolysis of lignin impregnated with cobalt (Co) was conducted to fabricate a Co-biochar (i.e., Co/lignin biochar) for use as a catalyst for bromate (BrO(3)(-)) reduction. Carbon dioxide (CO(2)) was employed as a reaction medium in the pyrolysis to induce desired effects associated with CO(2); (1) the enhanced thermal cracking of volatile organic compounds (VOCs) evolved from the thermal degradation of biomass, and (2) the direct reaction between CO(2) and VOCs, which resulted in the enhanced generation of syngas (i.e., H(2) and CO). This study placed main emphases on three parts: (1) the role of impregnated Co in pyrolysis of lignin in the presence of CO(2), (2) the characterization of Co/lignin biochar, and (3) evaluation of catalytic capability of Co-lignin biochar in BrO(3)(-) reduction. The findings from the pyrolysis experiments strongly evidenced that the desired CO(2) effects were strengthened due to catalytic effect of impregnated Co in lignin. For example, the enhanced generation of syngas from pyrolysis of Coimpregnated lignin in CO(2) was more significant than the case without Co impregnation. Moreover, pyrolysis of Coimpregnated lignin in CO(2) led to production of biochar of which surface area (599 m(2) g(-1)) is nearly 100 times greater than the biochar produced in N(2) (6.6 m(2) g(-1)). Co/lignin biochar produced in CO(2) also showed a great performance in catalyzing BrO(3)(-) reduction as compared to the biochar produced in N(2)"
Keywords:		bromate reduction carbon dioxide engineered biochar lignin pyrolysis waste-to-energy;
Notes:		"PubMed-not-MEDLINECho, Dong-Wan Kwon, Gihoon Ok, Yong Sik Kwon, Eilhann E Song, Hocheol eng 2017/04/01 ACS Appl Mater Interfaces. 2017 Apr 19; 9(15):13142-13150. doi: 10.1021/acsami.7b00619. Epub 2017 Apr 10"