The effects of different volume fractions of potassium on co-gasification characteristics of washing rice straw(RS)and polyethylene(mass fraction of 40%)in oxygen-enriched atmosphere was experimentally investigated in a small fixed bed reactor.The gas instantaneous release concentration

carbon conversion rate and gas production of the washing RS and its mixture with polyethylene during oxygen-enriched gasification were analyzed at 800 ℃

under condition with oxygen concentration of 40%.The results indicate that

the potassium promoted the CO_2 generation but refrained CO formation during oxygen-enriched gasification of the washing RS and its mixture with polyethylene.However

it had little effect on H_2 and CH_4 formation.The carbon conversion rate of the washing RS mixed with polyethylene reached the highest after the washing RS was immersed in solution with potassium mass fraction of 3%and mixed with the polyethylene solution with mass faction of 40%.The carbon conversion rate decreased with an increase in the potassium mass fraction.The total gas production of the washing RS with alkali salt addition mixed with polyethylene was lower than that without alkali salt addition.