| The mixture of biomass and plastic made into derived fuel can improve the gas heat value because of the gas heat value of biomass gasification is lower. Influence of alkali metal on washing rice straw and alkali salt addition on washing rice straw mixed polyethylene gas characteristics with oxygen-enriched was carried out in a fixed bed reactor. The infrared flue gas analyzer was used to measure on-line, and the influence of temperature on migration behavior of alkali metal during gasification was simulated by thermodynamic equilibrium software.Thermodynamic equilibrium simulation results indicated that alkali metal mainly released in the form of alkali chloride in gas phase during rice straw mixed with polyethylene oxygen-enriched gasification. The ideal gasification temperature of the gasifier is about 800?combined with the influence of temperature on gas characteristics during rice straw mixed with polyethylene oxygen-enriched gasification.The results indicated that the trend of CO instantaneous release concentration increased but CO2 decreased, and CH4/H2 changed little with temperature varied from 700? to 800?.Potassium promoted CO2 generation and refrained CO generation, but little effected on CH4 and H2 generation of rice straw. Sodium refrained CO generation and promoted CO2 generation, CH4 and H2 changed little during rise straw gasification with oxygen-enriched.The promote effect of potassium on CO2 generation is stronger than sodium and refrain effect on CO generation is also stronger than sodium during rice straw gasification with oxygen-enriched.The results indicated that CH4 and H2 instantaneous release concentration increased with the mixture ratio improved from 0 to 40%, and the growth range of CH4 instantaneous release concentration is higher than H2. CH4 instantaneous release concentration is increased from4.6% to 25.27% and H2 is increased from 4.5% to 10.21%. Potassium refrained CO generation and promoted CO2 generation, and CH4 instantaneous release concentration changed little.The volume fraction of H2 had risen slightly with 3%K of derived fuel. Carbon conversion reached maximum value with 3%K of derived fuel and decreased when improved the potassium content. Sodium refrained CO generation and promoted CO2 generation during rice straw mixed Polyethylene gasification with oxygen-enriched, and CH4/H2 instantaneousrelease concentration changed little. The promote effect of potassium on CO2 generation is weaker than sodium and the refrain effect on CO generation is stronger than sodium during derived fuel gasification with oxygen-enriched. |
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