| 废轮胎流化床热解半焦结构特性 |
| 摘要点击 1557 全文点击 1741 投稿时间：2003-11-13 修订日期：2003-12-18 |
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| 中文关键词 废轮胎 流化床 热解 半焦 结构 |
| 英文关键词 waste tire fluidized bed pyrolysis char configuration |
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| 中文摘要 |
| 以流化床反应器为主体对废轮胎热解半焦微观结构特性进行了研究.主要研究了热解温度、床料粒径、流化数等参数对热解半焦的比表面积、孔隙率、孔体积的影响.结果表明:半焦比表面积和孔隙率随温度变化过程中会在650℃或750℃出现一峰值,这表明对半焦品质而言,轮胎存在最佳的热解温度,采用较小粒径(0.135～0.304mm)床料时有使最佳热解温度下降的趋势;半焦孔隙率随流化数增加而减小;半焦比表面积随流化数的变化趋势与热解温度有关,550℃时流化数增加半焦比表面积减小,650℃时流化数增加半焦比表面积增大;半焦孔体积随温度的变化趋势与床料粒径有关,采用较大粒径(0.304～0.4mm)床料时,半焦孔体积随温度升高呈现先降后升的趋势,而采用较小粒径(0.135～0.304mm)床料时,半焦孔体积随温度升高呈现下降的趋势.
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| 英文摘要 |
| With the fluidized bed as main reactor, the configuration of chars of waste tire was investigated. The change of specific surface area, porosity and specific pore volume of chars received at various temperature, diameter of bed materials and superficial fluidization number was mainly researched. The specific surface area and porosity of chars had the peak value at 650℃ or 750℃, which showed there exists the best pyrolysis temperature from the angle of char quality and it will decrease with smaller diameter of bed materials, 0.135～0.304mm. The porosity of chars decreases with the fluidization number increasing.The change tendency of the specific surface area of chars with the fluidization number is correlated with the pyrolysis temperature. At 550℃ the specific surface area of chars decreases with the fluidization number increasing, while at 650℃the other way round. The change tendency of the specific pore volume of chars with the temperature is correlated with the diameter of bed materials. With larger bed materials( 0.304～0.4mm),the specific pore volume of chars rises at fisrt, then decreases with the temperature increasing, and with smaller bed materials, it decreases with the temperature increasing. |
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