Pyrolysis of coal in hydrogen and helium plasmas
Pyrolysis of coal in hydrogen and helium plasmas
复制标题
DOI：
10.1016/0016-2361(88)90380-8
复制
发表时间：
1988-08
期刊：
影响因子：
7.4
通讯作者：
H. Baumann;D. Bittner;H. Beiers;J. Klein;H. Jüntgen
中科院分区：
文献类型：
--
作者：
H. Baumann;D. Bittner;H. Beiers;J. Klein;H. Jüntgen
乙炔是煤在氢等离子体中热解的最有趣的产物，其形成速率取决于煤的热传递以及热解和均相气相反应的动力学。为了区分热解和与氢气的反应，用惰性气体氦气和氢气进行了实验。该装置的时间分辨率便于测量不可冷凝反应产物的增加。实验是在1000 °C和2000 °C之间的温度下用高挥发性烟煤（粒度100 μm）进行的。煤颗粒被快速加热到低于气体温度的温度，然后释放挥发物，只要这些挥发物是可获得的，挥发物就与高活性等离子体物质反应。当煤的热解在约4ms后完成时，半焦被加热到气体温度。煤可以在等离子体射流中爆裂成非常细的颗粒尺寸，从而提高乙炔产率。
The rate of formation of acetylene, the most interesting product of coal pyrolysis in hydrogen plasma, is determined by heat transfer to coal and by the kinetics of pyrolysis and homogeneous gas phase reactions. Experiments were carried out with the inert gas helium and hydrogen in order to distinguish between pyrolysis and reactions with hydrogen. The time resolution of the apparatus facilitated measurement of the increase of non-condensable reaction products. The experiments were performed with a high volatile bituminous coal (particle size 100 μm) at temperatures between 1000 °C and 2000 °C. the coal particles are rapidly heated to a temperature lower than the gas temperature, then volatiles are released, which react with highly reactive plasma species as far as these are available. When the pyrolysis of coal is finished after about 4 ms, the char is heated up to gas temperature. Coal can burst in the plasma jet to very fine particle sizes, thus enhancing the acetylene yield.