471572 Effect of Feedstock Formatting on Gasification Performance for Hyprid Poplar, Corn Stover and Low-Quality Materials
Hybrid poplar was tested at 9 different conditions using a 32 matrix with respect to particle size and moisture content. Corn stover was tested at varying particle sizes, and MSW were tested at 4-6 mm particle size and ‘as is’ moisture. In addition, the different samples were air classified and assigned a measure of buoyancy to delineate between particle size affects and buoyancy. Inorganic and organic mass balances were done for the initial feedstock materials and the resulting slag, when possible, using ICP and CHNO proximate/ultimate analyses. CO2, CO and H2 production were measured inline and from collected product gas samples. The presence of other hydrocarbons was tested using GC-MS, but none were detected. Results suggest that hybrid poplar produced syn gas between 30 and 40% H2, and between 35 and 45% CO, with some dependency on formatting conditions. Less than 2% of the material was recovered as slag, and it generally consisted of silica and alkali and alkaline earth metals. Initial testing of the corn stover and MSW suggest successful gasification, but that formatting plays a more critical role in MSW gasification than in hybrid poplar gasification.
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