摘要
以流化床反应器为主体对废轮胎热解半焦微观结构的变化进行了研究。主要研究了热解温度、流化状态(床料粒径、流化数)对热解半焦的孔径分布的影响。结果表明,低温下热解所得半焦,200 μm左右的大孔比例很大,中小孔径系还没有得到充分发展。升高热解温度使大孔被破坏,同时中小孔孔系大量形成,使得整个半焦的孔结构以中孔为主,这样得到的半焦将有利于其作为生产吸附大分子污染物吸附剂的前驱物。采用0.135～0.304 mm粒径的床料,改变流化数对半焦的孔结构没有明显的影响,较小流化数也可以得到中孔比例很大的半焦。
With the fluidized bed as main reactor, it introduces a ser of laboratory apparatus with feature of experimental process and results in pyrolysis of waste tire (waste tire is paralyzed in bubbling bed reactor). The change of pore distribution of chars received at various temperatures, diameter of bed materials and superficial fluidization velocity is mainly discussed. The pore of chars received at low temperatures are mostly made up of macropores (>50nm diameter) at 200μm diameter, while micropores and mesopores are few. Increasing the pyrolysis temperature decreased the macropores but increased micropores and mesopores distribution; chars received at this temperature are in favor of being the precursor of sorbent to absorb large molecule pollutants.
出处
《电站系统工程》
北大核心
2003年第1期9-12,共4页
Power System Engineering
基金
国家自然科学基金(59836210)
