超重力法脱除海上油田伴生气中CO_2的研究  

Removal of CO_2 from offshore associated gas with supergravity method

作　　者：黄伟莉[1] 张帮亮[2] 刘华标 毛宁[2] 

机构地区：[1]广东石油化工学院化学工程学院,广东茂名525000 [2]广东石油化工学院石油工程学院,广东茂名525000

出　　处：《现代化工》2017年第3期113-116,118,共5页Modern Chemical Industry

基　　金：茂名市科技计划项目(201621)

摘　　要：用容积7 L的气/液逆流反应超重力机,强化TEA水溶液单次瞬时吸收常压,进气量为500 mL/min,含CO_2体积分数为6%的模拟海上油田伴生气,优化出CO_2脱除率达80.5%的单一TEA型吸收剂的处理条件:TEA质量分数为20%,超重力机转速为2 000 r/min,温度为30℃,气液体积比为10∶1。为了提高CO_2脱除率,在TEA质量分数为20%的水溶液中添加不同质量分数的NaOH,组成质量分数为0~20%的Na OH与20%TEA的复合吸收液,进行了CO_2的脱除实验。结果表明:5%NaOH+20%TEA的复合液对CO_2的单次瞬时脱除率达98%以上,明显高于单一TEA溶液对CO_2的脱除率。在180~480 min内,该复合液对CO_2的连续脱除率明显高于5%Na OH和20%TEA 2种单一吸收剂在相同的时间内对CO_2的脱除率之和,且无Na_2CO_3结晶析出过多而阻塞管道的现象。The CO2 removal effect from simulated offshore associated gas with 6% CO2（ volume fraction） and500 m L/min gas inflow under atmospheric pressure is studied by using gas/liquid reflux supergravity machine to strength a single instantaneous absorption process of aqueous solution of TEA. When the CO2 removal rate is 80. 5%,the optimum treatment conditions for single aqueous solution of TEA are： 20% mass fraction of TEA,2000 r/min of supergravity rotating speed,30℃ of temperature and 10∶ 1 of the gas-liquid volume ratio. In order to enhance CO2 removal rate,CO2 removal experiments from simulated offshore associated gas are carried out with a mixture complex solution containing 0- 20% Na OH（ mass fraction） and 20% TEA（ mass fraction）. The results show that complex solution prepared by adding 5% Na OH（ mass fraction） into 20% TEA（ mass fraction） has the single instantaneous CO2 removal rate above98%,which is higher than that of TEA solution. The continuous CO2 removal rate of the complex solution during 180-480 min is higher than the sum of the separate solution of 5% Na OH（ mass fraction） and 20% TEA（ mass fraction）.Moreover,there is no pipe blockage phenomena caused by excessive precipitation of Na2CO3 crystal.

关 键 词：超重力 三乙醇胺 CO2吸收 复合液 海上油田伴生气 

分 类 号：TQ028.2[化学工程]