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Effect of Drying Temperature of Sawdust Biobriquettes with Used Lubricant Oil Adhesive Volume Variation over Carbonization Process

Putri Rizka Wulandari, Rahmatullah, Santoso Budi, Savitri Aulia, Zahara Maulika

Journal of Ecological Engineering

2024

Vol. 25, nr 2

309--320

Renewable energy is one way to deal with the scarcity of fossil energy. Biobriquette is an alternative energy that can be used as a substitute for fuel. This research aims to determine the characteristics of each variation of biobriquettes, namely moisture content, ash content, volatile matter content, bound carbon content, calorific value, and combustion test. The raw material is sawdust of Sungkai wood (Peronema canescens Jack) with carbonization method at 300 °C for 1 hour. This study used an experimental method by varying the sawdust weight of 8.7 g, 17.4 g, 26.1 g, 34.8 g with a ratio of 2:1 for each raw material and adhesive used lubricant oil. In addition, the drying temperature of the briquettes is also varied by 80 °C (A) and 100 °C (B). Biobriquettes 4B had the best moisture content and ash content with the lowest levels of 5.98% and 1.54 %, respectively. The levels of volatile matter and fixed carbon levels are closest to Energy and Mineral Ministry Regulation Number 47 of 2006 (PERMEN ESDM) namely 4A briquettes of 59.44% and 1B briquettes with a content of 31.57%. Almost all samples met the standard for calculating the calorific value of Energy and Mineral Ministry Regulation Number 47 of 2006 (minimum 4400 cal/gr) with a the result of 4512–4850 cal/g. The ignition time of all samples was in the range of 9.67–17.9 seconds, it is faster than the ignition time of coal in the range of 286 seconds. The fastest burning time was sample 3B with a time of 19.83 minutes and the longest was sample 4A with a time of 38.95 minutes. The briquettes that had the best performance in boiling 100 ml of water were 4B briquettes with a burning temperature of 462.3 °C, a burning rate of 0.4501 and a boiling time of 2.48 minutes.

Influence of Sieve Size on Calorific Value and Proximate Properties of Bio-Briquette Composites

Aliah Hasniah, Winarti Indri, Iman Ryan Nur, Setiawan Andhy, Safarina Rizky, Sawitri Asti

Journal of Ecological Engineering

2023

Vol. 24, nr 7

25--34

This work aimed to observe the influence of calorific value and proximate properties in the fabrication of rice husk (RH) and coffee shell (CS) briquettes composite. Rice and coffee husks contain cellulose, hemicellulose, and lignin. These contents are necessary for the adhesive to bind the briquette (amylose and amylopectin). The raw materials were carbonized at 400 °C for 60 minutes. Variations of sieving size (60, 80, and 100 mesh) and the composition ratio of raw material CS:RH were reviewed to study their effect. Tests of density, moisture content, volatile matter content, ash content, fixed carbon content, shatter index, combustion rate, and calorific value were carried out to determine the optimum composition. The results were obtained with the best quality at a particle size of 60 mesh with the highest calorific value of 17.422 MJ/kg. It showed that the briquettes have good quality and are comparable with the standard briquette.