Setiawan, Adi and Hasibuan, As'ad and Faisal, Faisal and Nur, Taufiq Bin (2019) Densification of bio-char produced through a slow pyrolysis of Arabica coffee-pulp at various pressures. In: 5th INTERNATIONAL CONFERENCE ON RECENT ADVANCES IN AUTOMOTIVE ENGINEERING (RECAR 2019), 20-22 August 2019, BANGI, MALAYSIA. (Unpublished)
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Abstract
A rise in annual coffee production poses an increase in coffee residuals which is a potential source of renewable energy. The use of coffee pulp, the outer skin of coffee cherry as a raw material for bio-briquettes may be an effective way to minimize their wastage as landfill. This study aims to examine the characteristics of densified bio-char produced through a slow pyrolysis process and pressed at a pressure of 100, 150 and 200 kg/cm2. Prior to densification process, bio-char was ground and sieved to mesh 20. A mixture was then made by adding 40 wt% starch binder followed by molding and drying processes. Characterization of the briquette employs a number of techniques including SEM, bomb calorimeter and proximate analyses as well as mechanical testing. The results show that the calorific value of the coffee-pulp briquette is 16.86 MJ/kg containing 11.29 % of moisture, 12% volatile matter, 59.68% fixed carbon and 17.03.% ash. The average rate of combustion is 0.53 g/s with ignition time ranging from 609 to 795 s. Increasing briquetting pressure prolongs the time required for ignition as the density is increased. However, no significant change was observed on the rate of combustion upon increasing the briquetting pressure. This investigation concludes the potential use of coffee industry by-product as feedstock for solid biomass fuel production.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Subjects: | T Technology & Engineering > TP Chemical engineering, Technology > Biomass T Technology & Engineering > TP Chemical engineering, Technology > Renewable Energy T Technology & Engineering > TJ Mechanical engineering and machinery T Technology & Engineering > TP Chemical engineering, Technology |
| Divisions: | Faculty of Engineering > Department of Mechanical Engineering |
| Depositing User: | Adi Setiawan |
| Date Deposited: | 05 Aug 2021 05:51 |
| Last Modified: | 05 Aug 2021 05:51 |
| URI: | http://repository.unimal.ac.id/id/eprint/6675 |
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