Fuel briquettes from waste coffee pulp and hulls

Date of Publication

1991

Document Type

Bachelor's Thesis

Degree Name

Bachelor of Science in Chemical Engineering

Subject Categories

Engineering

College

Gokongwei College of Engineering

Department/Unit

Chemical Engineering

Abstract/Summary

This study is composed of two main parts. The first part was the design and fabrication of a simple briquetting machine. The second part was the determination of the physical and fuel characteristics of the best briquettes. These briquettes were produced from coffee wastes using the designed briquittor. Briquetting was done at low pressure with the aid of cassava starch and molasses as binders. The briquettes were made up of three sizes (2.5, 3.8, 5.0 cm. dia. and 3.0 cm. high) and the best was found to be of size 5.0 cm. dia. and 3.0 cm. high. The appropriate particle sizes was that passing thru Mesh 20. A binder concentration of 6 percent wt. using a 10 percent wt. starch paste was found to be the optimum concentration. The average proximate analysis of the briquettes indicated 11.7 percent MC, 62.o percent VCM, 4.8 percent ash, and 21.5 percent FC. Its gross heating value was 3.784.55 cal/g. The Orsat analysis of its smoke showed 2.85 percent CO2, 7.33 percent 02, 0.85 percent CO, and 88.75 percent Gas residue. The core temperatures ranged from 639.2 to 671.4 C and the burning period lasted from 55 to 110 minutes. The briquettes were also subjected to Thermal Gravimetric Analysis (TGA) at a heating rate of 10 C/min. Rapid weight loss was observed during the evolution of VCM. The briquettes were found to withstand load of 14.95 to 50.04 kg. and the drop test proved that they can also withstand the shocks of handling and transportation. The physical and fuel characteristics obtained from the briquettes indicated that they qualify as a good

alternative fuel for domestic purposes.

Abstract Format

html

Language

English

Format

Print

Accession Number

TU05668

Shelf Location

Archives, The Learning Commons, 12F, Henry Sy Sr. Hall

Physical Description

123 leaves ; Computer print-out.

Keywords

Briquets (Fuel); Coffee waste; Coffee pulp; Waste products; x2 Pulp, Coffee

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