Pyrolytic Transformation of Indigenous Biomass Wastes into Biochar: An Insight into Char Structure and Physicochemical Characteristics

EnergyRN eJournal Pub Date : 1900-01-01 DOI:10.2139/ssrn.3644992

Nivya Mariam Paul, V. S. Harikumar

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引用次数: 3

Abstract

Biochar, the product obtained by the pyrolysis of organic materials with little or no available air acts as a long-term recalcitrant source of organic carbon when applied to soil. In the present study an in-farm method has been standardized for the pyrolytic conversion of four indigenous biomass resources in to biochar which otherwise would have been a waste burden to the environment. The biomass feedstocks viz. bovine bone (BB), coconut shell (CS), rubber wood (RW) and water hyacinth (WH) showed an ash content ranging from 1.04-61.23%, moisture content 8.46-20.83%, volatile matter 27.92-74.92% and fixed carbon 1.17-18.75%. The ultimate analysis revealed C, H, N and O percentage ranging from 23.50-46.50, 0.31-3.43, 4.53-7.07 and 7.31-52.18% respectively. Their calorific value ranged from 7.89-23.69 MJ kg -1 . The cellulose, hemicelluloses and lignin content ranged from 35.20-57.97, 25.47-26.00 and 2.07-39.97% respectively. The biochar yield was maximum in BB (56.65%) followed by WH (35.44%), CS (32.68%) and RW (26.54%). SEM analysis of the biochar samples showed aligned honeycomb like groups with the greatest porosity (3.90-8.43 µm) in WH biochar. EDX analysis detected 9 (BB), 11 (CS), 10 (RW) and 16 (WH) elements in biochar samples. The electrical conductivity, bulk density and water holding capacity of the biochars ranged from 16.76-7569.03 µs cm -1 , 6.83-72.58 g cm 3 and 57.89-431.17% respectively. The FTIR analysis of biochar samples showed several functional groups. Characteristics of the biochar produced from these biomass wastes revealed its potential as good soil conditioners in crop production systems.

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原生生物质废弃物热解转化为生物炭:对炭结构和理化特性的认识

生物炭是有机材料在很少或没有可用空气的情况下热解得到的产物，当应用于土壤时，它是有机碳的长期顽固来源。在目前的研究中，一种农场内方法已被标准化，用于将四种本地生物质资源热解转化为生物炭，否则将对环境造成浪费负担。以牛骨(BB)、椰子壳(CS)、橡胶木(RW)和水葫芦(WH)为原料，其灰分含量为1.04 ~ 61.23%，水分含量为8.46 ~ 20.83%，挥发物含量为27.92 ~ 74.92%，固定碳含量为1.17 ~ 18.75%。C、H、N、O含量分别为23.50 ~ 46.50、0.31 ~ 3.43、4.53 ~ 7.07和7.31 ~ 52.18%。它们的热值为7.89-23.69 MJ kg -1。纤维素含量为35.20 ~ 57.97，半纤维素含量为25.47 ~ 26.00，木质素含量为2.07 ~ 39.97%。生物炭产率以BB最高(56.65%)，其次为WH(35.44%)、CS(32.68%)和RW(26.54%)。生物炭样品的SEM分析显示，WH生物炭孔隙率最高(3.90 ~ 8.43µm)，呈蜂窝状排列。EDX分析在生物炭样品中检测到9个(BB)、11个(CS)、10个(RW)和16个(WH)元素。生物炭的电导率、容重和持水量分别为16.76 ~ 7569.03µs cm -1、6.83 ~ 72.58 g cm - 3和57.89 ~ 431.17%。生物炭样品的FTIR分析显示了几个官能团。从这些生物质废弃物中产生的生物炭的特性揭示了其在作物生产系统中作为良好土壤调节剂的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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EnergyRN eJournal

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