含氧煤层气脱氧过程中硫化物的脱氧特性

DEOXYGENATION CHARACTERISTIC OF SULFIDE OXIDATION IN THE PROCESS OF OXYGEN-BEARING COAL MINE METHANE

为了充分利用含氧煤层气,采用硫化物氧化法,利用热重和固定床反应器研究了含氧煤层气脱氧过程中温度、流速及催化剂等因素的影响.研究结果表明,在固定床上,硫化钠作为脱氧剂,低于500℃的条件下,可有效降低含氧煤层气中的氧含量.利用硫化钠脱氧的过程中,分子筛相对其他金属离子催化剂有明显的催化效果.整个脱氧反应过程受外扩散影响较大,小流量有利于提高反应转化率,但Na2S反应转化率总体偏低.

In order to make use of the oxygen-bearing coal mine methane （CMM） effectively, sulfide oxidation is introduced, and the impact of reaction temperature, flow velocity, cat- alyst and other factors on the deoxygenation process is investigated using TG technology and fixed-bed reator. The results show that oxygen content is obviously reduced by using Na2 S as de- oxygenation reagent under the temperature of 500 ~C. In the whole reaction process, molecular sieves, compared with other metal ion zeolite catalysts, have significant catalytic efficiency. The process of reaction is deeply influenced by external diffusion, and small flow velocity is propitious to improve the reaction rate of conversion, but it＇s still a little low for Na2S.