280277 Effect of Temperature and Oxidizing Medium On Tar Formation in Southern Pine Gasification

Tuesday, October 30, 2012: 4:35 PM
303 (Convention Center )
Narendra Sadhwani1, Sushil Adhikari2, Mario Richard Eden1, Shyamsundar Ayalur Chattanathan2 and Norredine Abdoulmoumine3, (1)Department of Chemical Engineering, Auburn University, Auburn, AL, (2)Biosystems Engineering, Auburn University, Auburn, AL, (3)Bilogical Systems Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA

Synthesis gas (a.k.a. syngas) can be used as a feedstock in industrial applications for electricity, chemical and hydrocarbons production. However, each application has stringent syngas cleanliness requirements to avoid operational complications. Consequently, gasification syngas cleanup has emerged as a pivotal research area since the advancements have direct implications on the technical and economic viability of gasification. Tar, a major contaminant in synthesis gas, poses technical and operational issues ranging from equipment corrosion and fouling, environmental pollution and catalyst deactivation. The objective of this study was to analyze the effect of temperature and oxidizing medium on tar formation and its mechanism in southern pine gasification. The effect of three temperature levels (600oC, 700oC, 800oC) and two oxidizing media (steam and carbon dioxide) on the primary gases (CO, CO2, CH4 and H2) and tar were studied using a bench-scale fluidized bed gasifier. A number of gas analysis instruments such as a GC/MS (Agilent 7890/5975), a micro GC (Agilent 490), a portable gas analyzer (Nova 7905AQN4), and an FTIR were used to collect the necessary information. Results from both experimental and mathematical studies will be presented.

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