Considering the very short particle residence time in the free-fall reactor, air was directly used as carrier gas to study the fast pyrolysis and sulfur evolution of coal under oxidizing atmosphere.
充分利用煤颗粒在自由落下床反应器中停留时间短的特点，直接用空气做载气，对自由落下床反应器中煤在氧化性气氛下的快速热解行为和硫的变迁进行了研究。
The results showed that the desulfurization reaction took place at gas-solid interfaces, and that gaseous COS was found to be an intermediate product acting as sulfur-carrier.
结果表明脱硫反应是在气固相界面之间进行，气体COS是中间载硫体。
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