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Erschienen in: Biomass Conversion and Biorefinery 2/2018

06.04.2017 | Original Article

Thermochemical characterization of biochar from cocoa pod husk prepared at low pyrolysis temperature

verfasst von: Chi-Hung Tsai, Wen-Tien Tsai, Sii-Chew Liu, Yu-Quan Lin

Erschienen in: Biomass Conversion and Biorefinery | Ausgabe 2/2018

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Abstract

In this work, cocoa pod husk (CPH), a processing by-product from the cocoa industry, was evaluated as a potential feedstock for preparing biochar fuel at relatively low pyrolysis temperature. First, its thermochemical characteristics, including the calorific value and mineral component analyses, were investigated, showing that the bioresource obviously contained a large percentage of volatile matter. It thus had a higher heating value of 17.8 MJ/kg but showed a higher potassium content in ash (i.e., 4.03 wt%). A series of CPH-based biochars (i.e., CPHBC) were produced at different temperatures (i.e., 190, 220, 250, 280, 310, 340, and 370 °C) and residence times (i.e., 30, 60, 90, and 120 min). The resulting biochars were subject to the analyses of chemical and thermal properties. The calorific value of resulting biochar indicated an increasing trend with pyrolysis temperature, but there was slightly decreasing change at the longer residence time under the fixed pyrolysis temperature (i.e., 370 °C). The optimal biochar product had a thermochemical characteristics with high carbon (>60 wt%) and calorific value (>25 MJ/kg, dry basis). Furthermore, the CPH-based biochar showed a lignite-like feature based on the O/C and H/C molar ratios, but it would not be appropriate to be fired in boilers because of its high mineral contents (i.e., potassium).

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Metadaten
Titel
Thermochemical characterization of biochar from cocoa pod husk prepared at low pyrolysis temperature
verfasst von
Chi-Hung Tsai
Wen-Tien Tsai
Sii-Chew Liu
Yu-Quan Lin
Publikationsdatum
06.04.2017
Verlag
Springer Berlin Heidelberg
Erschienen in
Biomass Conversion and Biorefinery / Ausgabe 2/2018
Print ISSN: 2190-6815
Elektronische ISSN: 2190-6823
DOI
https://doi.org/10.1007/s13399-017-0259-5

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