Production and Characterization of Hybrid Briquettes from Corncobs and Oil Palm Trunk Bark under a Low Pressure Densification Technique

Abstract

The objective of this research was to investigate the quality of hybrid briquettes developed from corncobs (CC) and oil palm trunk bark (OPTB) under a low-pressure densification technique. The materials were combined in varying ratios of CC to OPTB (100:0, 75:25, 50:50, 25:75, 0:100) and wastepaper pulp (10% by weight) was added to each mixture as a binder. The briquettes were produced using a manually operated 20-tonne hydraulic piston press at 28 °C temperature and ≤7 MPa compaction pressure. The mechanical strength of the briquettes was determined by the drop test and compression test methods, while a bomb calorimeter was used to determine the calorific values. The results showed that the physical properties of hybrid briquettes ranged from 9.24–10.00% moisture content, 0.38–0.40 g/cm3 density, and 87.60%–92.00% water resistance. Mechanical strength showed a 98.28%–99.08% shatter index and 18.47–21.75 MPa compressive strength, while calorific values ranged from 16.54–16.91 MJ/kg. The hybrid briquettes fared better than the CC briquettes. The significance of this study lies in the production of briquettes with suitable physical, mechanical and thermal properties by utilizing OPTB which have hitherto not been used, mixed with corncobs. This could bring substantial environmental and socio-economic benefits to rural communities of the developing countries.

Investigation of some Properties of Bio-coal Briquettes Produced using Beniseed (Sesame seed) Stalks as Biomass

“…Also, according to Alpha Resources LLC laboratory (ISO17034, ISO17025, ISO9001:2015) publication in 2018, the standard acceptable value for Nitrogen content in coal is 1.20% ± 0.18 dry basis measured according to ASTM D5373. Both Sulphur and Nitrogen in the briquettes produced in this work have maximum value of 0.42% and 0.84 respectively which is lower than 0.8% and 1.38% referenced in both standards [61,62]. Nitrogen with changes in particle size or composition.…”

Uji Kualitas Briket dari Tongkol Jagung dengan Perekat Kanji/PET dan Komposisi Gas Buang Pembakarannya

“…Jenis biomassa, kondisi karbonisasi (suhu dan waktu), kondisi pembriketan (tekanan, jenis alat pembriket/penekan), dan jenis binder atau bahan pengikat briket merupakan faktor-faktor yang harus diperhatikan pada proses pembuatan briket [8]. Binder pada tahap pembriketan sangat dibutuhkan jika biomassa sebagai bahan baku briket memiliki densitas curah, kadar lignin, kadar karbohidrat mampu larut dalam air, dan kadar protein rendah, karena bahan-bahan kimia tersebut mampu membentuk jembatan ikatan antar butiran-butiran arang [9]. Kanji, tanah liat, tar kayu, pitch, dan molases merupakan bahan umum binder [8].…”

“…Peran tambahan ini dimungkinkan hanya jika nilai kalor dari PET lebih besar daripada nilai kalor arang tongkol jagung. Nilai kalor arang tongkol jagung sebesar 3983,25 kal/g[9]. Sedangkan PET memiliki nilai kalor sebesar 6124,40 kal/g[13].…”

e-Module in Producing Briquettes from Melinjo (Gnetum gnemon) Shell with Various Particle Sizes and Binder Concentrations for Vocational School Students

“…The percentage of resistance index (PWRI) is performed to determine the level of resistance of briquettes to water exposure (Kpalo, Zainuddin, and Manaf, 2020). Figure 8 shows the effect of tapioca concentration and particle size on PWRI briquettes.…”

“…The results of the analysis of variance show that the treatment of tapioca concentration and particle size has a significant effect (ρ <0.05) on the PWRI value and the treatment interaction has a significant effect (ρ <0.05) on the PWRI of briquettes. Kpalo, Zainuddin, and Manaf (2020) stated that the value of water resistance is related to briquette density, low density can reduce briquette water resistance (Kpalo, Zainuddin, and Manaf, 2020).…”