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xinyi8853(金币+90, 翻译EPI+1): 2011-03-11 08:12:43
During the steam gasification of used-car plastics and high polymeric rubber, high temperature and proper amount of vapor are benefit for producing more hydrogen and a higher carbon conversion rate. But the gasiification of those is obviously decreased if the temperature and amount of vapor are immoderate. Steam is an important medium of gasification which can increase carbon conversion rate and regulate the component of steam gasification effectively. When there is no catalyst and the temperature comes up to 850 ℃ as well as the steam flow rate is 0.165 g/min/gram high-polymer, the gasification efficiency tiptop of used-car high-polymer is 2.44 Nm3/kg and the carbon conversion rate attains to 95.78%. The catalyst Ni/ZSM-5 exerts a positive effect on gasification of rubber into H2 which reduces the carbon deposition on the catalyst after the reaction so that brings a less influence on its calalytic effect.
Adding the catalyst is conducive to improve the quality of gasified steam, that is, the contents of the combustible components (CO, H2 and CH4) in the gasified steam are significantly enhanced. The catalytic effect of Ni/ZSM-5-Si embedding with CaO is the best and Ni/ZSM-5 comes second.
Keywords: catalysts; high-polymer;steam;conversion rate;car |
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