农业环境科学学报2017，Vol.36Issue(3)：591-597,7.DOI:10.11654/jaes.2016-1160
生物质内源矿物对热解过程及生物炭稳定性的影响
Influence of inherent minerals on biomass pyrolysis and carbon stability in biochar
摘要
Abstract
In this study, two common biomass residues, peanut shell and cow manure were selected to investigate these influences. The ex-periments were conducted including removing the inherent minerals through acid washing for biochar formation, adding typical minerals into demineralized biomass for biochar generation, and the resulted bichars were characterized by thermogravimetric analysis, elemental analysis, chemical oxidation, and Raman spectroscopy. Results show that the main inherent mineral in peanut shell and cow manure biomasses was KCl and CaCl2, respectively and they had a significant catalytic effect on the biomass pyrolysis by decreasing the decomposition temperature of carbon from 250~400 ℃ to 200~350 ℃. CaCl2 showed a larger catalytic effect on the biomass pyrolysis than KCl. No obvious changes were observed on carbon retention(%)during biomass pyrolysis with mineral removal or addition, while in the absence of mineral the sta-bility of peanut shell and cow manure biochar was increased by 52.7%and 30.6%, respectively, indicated by oxidation of K2Cr2O7. Minerals promoted the lack of lattice in biochar(increased ID/IG), resulting in the reduced carbon stability. Overall, inherent minerals in biomass had catalytic effect on the decomposition of carbon skeleton during pyrolysis, and they made the carbon structure disordering, reducing the sta-bility of its carbon.关键词
生物质/内源矿物/热解/碳保留/催化效应/碳稳定性Key words
biomass/inherent minerals/pyrolysis/carbon retention/catalytic effect/carbon stability分类
资源环境引用本文复制引用
顾博文,曹心德,赵玲,赵英豪..生物质内源矿物对热解过程及生物炭稳定性的影响[J].农业环境科学学报,2017,36(3):591-597,7.基金项目
国家自然科学基金项目(21577087) The National Natural Science Foundation of China(21577087) （21577087）
