Journal of Oil Palm Research Vol. 23  2011 August p.  1060-1068

Air gasification of palm biomass for producing tar-free higher heating value producer gas

Author(s): ZULKIFLI Ab Rahman * ; MENON, N. Ravi * ; KU HALIM Ku Hamid **

The use of palm bio­mass for energy gen­er­a­tion has been gain­ing momen­tum in recent times on a global level. A tar-free pro­ducer gas can be obtained in a prop­erly designed bio­mass gasi­fi­ca­tion process. In the cur­rent study, a tar-free palm bio­mass gasi­fi­ca­tion sys­tem by high-temperature air is pro­posed. This con­cept was demon­strated on a pilot scale fixed bed using empty fruit bunches (EFB) under autother­mic con­di­tions. The pre-treated EFB were ini­tially pyrol­ysed, and the result­ing char was par­tially gasi­fied in the gasi­fi­ca­tion zone (oxi­da­tion zone) fol­lowed by com­bus­tion of the char residue at the reduc­tion zone (bot­tom of gasi­fier) in an oxi­da­tion atmos­phere. As the qual­ity of the pro­ducer gas was found to be depen­dent on the smooth flow of the fuel and the uni­for­mity of the pyrol­y­sis, the dif­fi­cul­ties encoun­tered dur­ing the exper­i­ments are also dis­cussed. The opti­mum oper­a­tion of the gasi­fier ranged between 1.71 and 2.34 Nm3 kg–1 of air-fuel ratios at val­ues of 28.2 and 37.0 kg hr–1 of 15% mois­ture feed rate, which gives a pro­ducer gas with a good heat­ing value of about 5.18 MJ Nm–3 at a vol­u­met­ric flow of 92.47–101.78 Nm3 hr–1 pro­ducer gas. It was con­cluded that the pre-treated empty fruit bunches are easy to gasify in a down­draft gasi­fier to pro­duce good qual­ity gas for process heat­ing and power gen­er­a­tion with min­i­mum pol­lut­ing by-products.

Keywords: , , ,

Author Information
* Malaysian Palm Oil Board, P. O. Box 10620, 50720 Kuala Lumpur, Malaysia.

** Faculty of Chemical Engineering, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia.

Cited By

Call For Papers

Search for ARTICLE

Most cited articles


Subscribe with us to get the latest information on Palm Oil Research from MPOB today!