CFD SIMULATION OF SAWDUST GASIFICATION ON OPEN TOP THROATLESS
DOWNDRAFT GASIFIER

Author(s): 
Fajri Vidian1*, Rachmat Dwi Sampurno1,2, Ismail3

Affiliation(s): 
1Department of Mechanical Engineering, Faculty of Engineering, Universitas Sriwijaya, Jalan Raya Palembang – Prabumulih km 32, Indralaya, Ogan Ilir, Sumatera Selatan 30662, Indonesia,
2Magister Student Department of Mechanical Engineering, Faculty of Engineering, Universitas Sriwijaya,
3Department of Mechanical Engineering, Faculty of Engineering, Universitas Pancasila, Srengseng Sawah – Jakarta 12640, Indonesia
*Corresponding Author Email: fajri.vidian@unsri.ac.id

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Sawdust is one of alternative energy sources to substitute the fossil fuels. The utilization of sawdust to produce energy can be done through different types of technologies. Gasification is one of techonology that can be used to convert sawdust into energy. Sawdust has the characteristics of small bulk density and bind to one another. The gasifier type corresponding to these properties is an open top throatless downdraft gasifier. The prediction of producer gas composition can be done through a simulation. This study was conducted to obtain the distribution of combustible gas, tar concentration and temperature at the inside of gasifier on different variations of equivalence ratio by using 2D of computational fluid dynamic. Simulation was performed on the variation of equivalence ratio of 0.2, 0.3 and 0.4. The simulation results showed that the increase of equivalence ratio tend to decrease of CO, H2, CH4 and tar followed by increasing of temperature at the inside of the gasifier.