摘要
为了研究电场作用对煤的甲烷吸附能力及吸附常数a、b值的影响,采用了直流脉冲电源,通过改变直流脉冲电场频率来进行实验研究。结果表明:在外加直流脉冲电场作用下,煤的甲烷吸附特性仍然遵循朗格缪尔(Langmuir)等温吸附曲线;直流脉冲电场对煤的甲烷吸附特性有抑制作用,即随着电场频率的增大,煤对甲烷的吸附量减少;直流脉冲电场减小了煤的比表面积,从而使煤对甲烷的吸附能力减弱;同时,煤的吸附常数b值随着直流脉冲电场频率增大成负指数减小,而吸附常数a值则基本不变。
In order to study the effect of electric field on methane adsorption capacity of coal and the adsorption constants a ＆ b, we adopted the DC pulse power to carry out this study by changing the frequency of DC pulse electric field. The result shows that the methane adsorption capacity of coal still follows the Langmuir isotherm adsorption curves under the influence of the external DC pulse electric field; DC pulse electric field can inhibit methane adsorption characteristics of coal, the increasing of electric field frequency, the methane adsorption amount of coal declines ; DC pulse electric field reduces the specific surface area of coal which weakens the methane adsorption amount of coal ; meanwhile the adsorption constant of coal, namely b reduces as the DC pulse electric field frequency increa- ses and there is a negative index relation between them and the adsorption constant a remains basically unchanged.
出处
《煤矿安全》
CAS
北大核心
2014年第10期7-9,13,共4页
Safety in Coal Mines
关键词
直流脉冲电场
吸附常数
吸附量
负指数
甲烷吸附特性
比表面积
吸附能力
DC pulse electric field
adsorption constant
adsorption amount
negative index
methane adsorption characteristic
specific surface area
adsorption ability
