煤矿安全2017，Vol.48Issue(10)：31-34,4.DOI:10.13347/j.cnki.mkaq.2017.10.009
高温下煤吸附氮气后氧化特性变化的实验研究
Experimental Study on Oxidation Characteristics of Coal Adsorbing Nitrogen at High Temperature
摘要
Abstract
When nitrogen gas is injected into spontaneous combustion zone,it is found that the temperature of the coal body still maintains at a high temperature for a period of time.The adsorption of nitrogen on the coal at high temperature affects the spontaneous combustion characteristics of coal.In this paper,Ximeng lignite was used as the study object.The gas samples were adsorbed at 200 ℃C for 6 h,12 h and 18 h respectively.The oxidation characteristics of coal samples after adsorption of nitrogen were studied by analyzing the gasification products and oxygen consumption,the apparent activation energy of coal oxidation and the change of coal pore structure parameters were analyzed.The results show that the release of gaseous products is higher than that of raw coal after high temperature adsorption of nitrogen.The adsorption of nitrogen at high temperature reduces the activation energy of coal,and the longer the adsorption time is,the lower the activation energy is.The average diameter,porosity and permeability are higher than that of coal,which increases the reaction rate of coal and oxygen and accelerates the process of coal and oxygen.关键词
高温氮气吸附/气相产物/活化能/孔径/氧化特性Key words
high temperature nitrogen adsorption/gas phase product/activation energy/pore size/oxidation characteristic分类
矿业与冶金引用本文复制引用
王涌宇,邬剑明,唐一博..高温下煤吸附氮气后氧化特性变化的实验研究[J].煤矿安全,2017,48(10):31-34,4.基金项目
国家自然科学基金资助项目(21176165,51274146) （21176165,51274146）
