【摘要】 在700～1000℃热解温度条件下制备了稻秸秆和麦秸秆焦并进行了SEM和BET、表面积测试分析,采用等温热重法研究了这些秸秆焦的CO₂气化反应特性。结果表明:在较低热解温度（700℃）下,秸秆热解焦中尚含有一定量未析出的焦油;在700～1000℃范围内,随热解温度上升秸秆焦的BET表面积逐渐增加,而气化反应活性却有所下降;在800～1100℃气化温度范围内,秸秆焦的气化反应性随气化温度明显增加,两种秸秆焦的表观活化能则随热解温度稍有增加,稻秸秆和麦秸秆焦的表观活化能范围分别为183.58～196.50kJ/mol和147.27～184.01 kJ/mol。更多还原

【Abstract】 Rice straw and wheat straw chars were prepared under the conditions of heating temperature ranging from 700℃to 1000℃.The effects of heating conditions on surface properties of straw chars,which included elemental composition, BET and SEM were mainly investigated.The gasification reactivity of straw chars with CO₂ was investigated by means of an isothermal thermo-gravimetric analysis.It was found that there is char oil left in the straw chars at 700℃;BET specific surface area increases while the gasification reactivity declines with the heating temperature from 700℃to 1000℃; The general gasification reactivity of chars increases with increasing gasification temperature.In addition,the ranges of the average apparent activation energies of rice straw and wheat straw chars are 183.58-196.50kJ/mol,and 147.27-184. 01 kJ/mol respectively.更多还原