Characteristics of Bio Pellets from Spent Coffee Grounds and Pinewood Charcoal Based on Composition and Grinding Method

Q2 Engineering

Journal of the Korean wood science and technology Pub Date : 2023-01-01 DOI:10.5658/wood.2023.51.1.23

Nopia Cahyani, A. Yunianti, Suhasman, K. T. P. Pangestu, G. Pari

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引用次数: 3

Abstract

One type of biomass that has promising potential for bio pellet production is spent coffee grounds (SCGs). However, previous studies have shown that SCGs in bio pellets cause a lot of smoke. Therefore, they need to be mixed with a material that has a higher calorific value to produce better quality pellets. One material that can be used is pine wood because it has a natural resin content that can increase the calorific value. The aim of this study was to examine the quality of bio pellets produced with SCGs and pine wood charcoal at different particle sizes. The charcoal was ground using either a hammer mill (HM) or a ball mill (BM). Pine wood charcoal was mixed with SCGs at ratios of SCGs to pine wood charcoal of 4:6 and 6:4 by weight, respectively, and the adhesive used a tapioca with a composition ratio 5% of the raw material. The bio pellets were produced using a manual pellet press. The quality of the bio pellets was assessed based on Indonesian National Standard (SNI) 8021-2014, and the physical observations include flame length, burning rate, and compressive strength. The average water content, ash content, and calorific value of the bio pellets were in accordance with SNI 8021-2014, but the density and ash content values were below the standard values. The BM variation of bio pellets had a higher compressive strength than the HM variation, and the 4:6 BM variation had the longest burning time compared with 4:6 HM.

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基于成分和研磨法的废咖啡渣和松木炭生物颗粒特性研究

废咖啡渣是一种具有生物颗粒生产潜力的生物质。然而，先前的研究表明，生物颗粒中的SCG会产生大量烟雾。因此，它们需要与热值较高的材料混合，才能生产出质量更好的球团。一种可以使用的材料是松木，因为它含有天然树脂，可以增加热值。本研究的目的是检验不同粒度的SCG和松木炭生产的生物颗粒的质量。使用锤式研磨机（HM）或球磨机（BM）研磨木炭。将松木炭与SCG以SCG与松木炭的重量比分别为4:6和6:4混合，并且粘合剂使用组成比为原料5%的木薯。使用手动压片机生产生物颗粒。生物颗粒的质量根据印度尼西亚国家标准（SNI）8021-2014进行评估，物理观测包括火焰长度、燃烧速率和抗压强度。生物颗粒的平均含水量、灰分和热值符合SNI 8021-2014，但密度和灰分值低于标准值。生物颗粒的BM变化比HM变化具有更高的抗压强度，并且与4:6 HM相比，4:6 BM变化具有最长的燃烧时间。

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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来源期刊

Journal of the Korean wood science and technology Materials Science-Materials Science (miscellaneous)

CiteScore

5.20

自引率

0.00%

发文量

期刊介绍： The Journal of the Korean Wood Science and Technology (JKWST) launched in 1973 as an official publication of the Korean Society of Wood Science and Technology has been served as a core of knowledges on wood science and technology. The Journal acts as a medium for the exchange of research in the area of science and technology related to wood, and publishes results on the biology, chemistry, physics and technology of wood and wood-based products. Research results about applied sciences of wood-based materials are also welcome. The Journal is published bimonthly, and printing six issues per year. Supplemental or special issues are published occasionally. The abbreviated and official title of the journal is ''J. Korean Wood Sci. Technol.''. All submitted manuscripts written in Korean or English are peer-reviewed by more than two reviewers. The title, abstract, acknowledgement, references, and captions of figures and tables should be provided in English for all submitted manuscripts.