• Vol 7, No 8 (2016)
  • Mechanical Engineering

Air Intake Modification for Pyrolysis Optimization on Rice Husk Fixed Bed Downdraft Gasifier with Maximum Capacity of 30 Kg/hour

Hafif Dafiqurrohman, Adi Surjosatyo, Felly Rihlat Gibran


Publish at : 30 Dec 2016 - 00:00
IJtech : IJtech Vol 7, No 8 (2016)
DOI : https://doi.org/10.14716/ijtech.v7i8.6889

Cite this article as:
Dafiqurrohman, H.., & Surjosatyo, A.Gibran, F.R.., 2016. Air Intake Modification for Pyrolysis Optimization on Rice Husk Fixed Bed Downdraft Gasifier with Maximum Capacity of 30 Kg/hour. International Journal of Technology. Volume 7(8), pp.1352-1361
238
Downloads
Hafif Dafiqurrohman Department of Mechanical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia. Tropical Renewable Energy Center, Faculty of Engineering, Universitas Ind
Adi Surjosatyo Department of Mechanical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia. Tropical Renewable Energy Center, Faculty of Engineering, Universitas Indo
Felly Rihlat Gibran Department of Mechanical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia
Email to Corresponding Author

Abstract

Rice husk is one of the most abundant biomass wastes in Indonesia. One way to convert it into an alternative source of energy is biomass gasification. This is a thermochemical process which converts biomass feedstock into fuel gas or chemical feedstock gas (producer gas). The gasification type which is developed in this study is fixed bed downdraft type due to its low tar content and compatibility in microscale implementation. One major problem with the implemented biomass gasification reactor was ruggedness of the partial oxidation process due to the absence of air in the reactor’s middle section, which consequently affected the pyrolysis zone. Several experiments were conducted previously using coconut shells and rice husks as solid feedstock, where an equivalence ratio (ER) of 0.4 was obtained. Therefore, in order to optimize the pyrolysis zone, the modification conducted involves adding a circular air intake into the gasifier. Experiments were conducted in a pyrolysis temperature range of 300–700oC with ER variation of 0.19, 0.24, 0.27 and 0.31. The results show that a good quality producer gas is produced at an ER value of 0.24. This value shows a promising result because the ER value of biomass gasification standard is 0.25.

Biomass gasification; Circular air intake; Fixed bed downdraft; Optimized pyrolysis zone; Rice husk