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中文摘要：
在800～950℃的气化温度下，采用等温热重实验方法对三种不同性质污泥在450℃下热解制得半焦的COz气化反应特性进行了研究．结果表明：随着气化温度的升高，污泥半焦完成气化反应所需的时间缩短，气化反应速率变快；半焦气化反应速率随碳转化率的增大而先增大后减小，且达到最大气化反应速率时的碳转化率随气化温度的升高而增加．在较低或较高的气化温度下，污水处理工艺中的厌氧过程使半焦气化反应性降低，而在中等气化温度下几乎没有影响；污泥厌氧消化则使半焦气化反应性明显降低，并随气化温度的升高而降低得更加明显．利用收缩核模型研究了污泥半焦的气化反应过程，结果表明：污水处理工艺对半焦气化反应的活化能和指前因子没有影响，而污泥厌氧消化则使它们降低．
英文摘要：
The gasification reaction properties of sludge chars with CO2, derived from the pyrolysis of three different sewage sludges under 450℃, were studied by isothermal thermal gravimetric analysis at the gasification temperature range from 800℃C to 950 ℃. The results show that the gasification re- action rate and completion time of sludge chars quickens and decreases with gasification temperature increasing respectively. The gasification reaction rate of the chars firstly increases and then decreases with the carbon conversion rate increasing, and the carbon conversion rate at the maximum gasifica- tion reaction rate increases with gasification temperature. The anaerobic process in wastewater treat- ment process makes gasification reactivity of the char decrease at lower or higher gasification tempera- ture, but there is little influence on it at the middle temperature. However, the sludge anaerobic di- gestion leads gasification reactivity of char decrease obviously, and the decrease becomes much more obvious with gasification temperature increasing. The gasification reaction processes of sludge chars were studied through the shrinking core model, indicating that there is no influence of the wastewater treatment processes on the activation energy and pre-exponential factor of char gasification reaction, while the sludge anaerobic digestion causes them to decrease.
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