Study of the effects of operating factors on the resulting producer gas of oil palm fronds gasification with a single throat downdraft gasifier

Malaysia has abundant but underutilized oil palm fronds. Although the gasification of biomass using preheated inlet air as a gasifying medium is considered an efficient and environmentally friendly method, previous studies were limited to certain types of biomass wastes and gasifier designs. Hence, the effects of preheating the gasifying air on oil palm fronds gasification in a single throat downdraft gasifier are presented in this paper. In addition, the effects of varying the flow rate of the gasifying air and the moisture content of the feedstock on the outputs of oil palm fronds gasification were studied. A response surface methodology was used for the design of the experiment and the analysis of the results. The results showed that preheating the gasifying air to 500 °C increased the concentrations of CO from 22.49 to 24.98%, that of CH4 from 1.98 to 2.87%, and that of H2 from 9.67 to 13.58% on dry basis in the producer gas at a 10% feedstock moisture content. Conversely, the dry basis concentrations of CO, CH4, and H2 decreased from 22.49, 1.98 and 9.67% to 12.01, 1.44 and 5.45%, respectively, as the moisture content increased from 10 to 20%. The airflow rate was also proven to significantly affect the quality of the resulting producer gas.

[1]  Kathleen M. Carley,et al.  Response Surface Methodology , 2004 .

[2]  V. Raghavan,et al.  Elemental and thermo-chemical analysis of oil palm fronds for biomass energy conversion , 2012 .

[3]  R. Xiao,et al.  High-temperature air/steam-blown gasification of coal in a pressurized spout-fluid bed , 2006 .

[4]  Wlodzimierz Blasiak,et al.  Performance analysis of a fixed-bed biomass gasifier using high-temperature air , 2006 .

[5]  Douglas C. Montgomery,et al.  Response Surface Methodology: Process and Product Optimization Using Designed Experiments , 1995 .

[6]  Siew Hoong Shuit,et al.  OIL PALM BIOMASS AS A SUSTAINABLE ENERGY SOURCE: A MALAYSIAN CASE STUDY , 2009 .

[7]  Suzana Yusup,et al.  Downdraft gasification of oil-palm fronds. , 2011 .

[8]  Prime Minister Malaysia.  Tenth Malaysia Plan: 2011-2015 , 2012 .

[9]  M. V. Gil,et al.  Application of response surface methodology to assess the combined effect of operating variables on high-pressure coal gasification for H2-rich gas production , 2010 .

[10]  G. Gautam,et al.  Parametric Study of a Commercial-Scale Biomass Downdraft Gasifier: Experiments and Equilibrium Modeling , 2010 .

[11]  Prabir Basu,et al.  Biomass Gasification and Pyrolysis: Practical Design and Theory , 2010 .

[12]  A. Gupta,et al.  Characteristics of syngas from co-gasification of polyethylene and woodchips , 2011 .

[13]  G. A. Quadir,et al.  Experimental investigation of a downdraft biomass gasifier , 2002 .

[14]  Changhou Liu,et al.  Steam gasification of biomass for hydrogen-rich gas in a free-fall reactor , 2007 .

[15]  A. Reynolds,et al.  The effect of air preheating in a biomass CFB gasifier using ASPEN Plus simulation , 2009 .

[16]  G. Najafpour,et al.  BIODEGRADATION OF PHENANTHRENE BY MIXED CULTURE CONSORTIA IN BATCH BIOREACTOR USING CENTRAL COMPOSITE FACE-ENTERED DESIGN , 2007 .

[17]  T. Fransson,et al.  Downdraft gasification of pellets made of wood, palm-oil residues respective bagasse: Experimental study , 2011 .

[18]  Sibel Ozdogan,et al.  Results with a bench scale downdraft biomass gasifier for agricultural and forestry residues. , 2011 .

[19]  Islam Ahmed,et al.  Syngas yield during pyrolysis and steam gasification of paper , 2009 .

[20]  K. Cen,et al.  Biomass-oxygen gasification in a high-temperature entrained-flow gasifier. , 2009, Biotechnology advances.

[21]  Raymond J. Spiteri,et al.  Study of factors affecting syngas quality and their interactions in fluidized bed gasification of lignite coal , 2013 .

[22]  W. Blasiak,et al.  High-temperature air and steam gasification of densified biofuels , 2004 .

[23]  Anita Ramli,et al.  Gasifier selection, design and gasification of oil palm fronds with preheated and unheated gasifying air. , 2012, Bioresource technology.

[24]  Tick Hui Oh,et al.  Energy policy and alternative energy in Malaysia: Issues and challenges for sustainable growth , 2010 .

[25]  Md. Rafiqul Islam,et al.  Renewable energy research in Malaysia , 1970 .

[26]  Yangbing Wen,et al.  OPTIMIZING ENZYMATIC PRETREATMENT OF RECYCLED FIBER FOR IMPROVING ITS DRAINING ABILITY USING RESPONSE SURFACE METHODOLOGY , 2012 .

[27]  V. Raghavan,et al.  Gasification and effect of gasifying temperature on syngas quality and tar generation: A short review , 2012 .

[28]  J. Fu,et al.  Multivariate-parameter optimization of acid blue-7 wastewater treatment by Ti/TiO2 photoelectrocatalysis via the Box–Behnken design , 2009 .

[29]  Shaharin Anwar Sulaiman,et al.  Syngas production from gasification of oil palm fronds with an updraft gasifier. , 2012 .

[30]  Electo Eduardo Silva Lora,et al.  Experimental study on biomass gasification in a double air stage downdraft reactor , 2011 .

[31]  Pratik N Sheth,et al.  Experimental studies on producer gas generation from wood waste in a downdraft biomass gasifier. , 2009, Bioresource technology.

[32]  Samson Mekbib Atnaw,et al.  Prediction of biomass conversion process for oil palm fronds in a downdraft gasifier , 2012 .

[33]  J. R. Kim,et al.  Biomass gasification in a circulating fluidized bed , 2004 .

[34]  D. Karamanev,et al.  Effect of the surfactant concentration on the rise of gas bubbles in power-law non-Newtonian liquids , 2004 .