氨法碳捕集耦合化工品生产实验研究

Experimental study on ammonia carbon capture coupled chemicals production

针对再生氨法碳捕集面临高昂的运行成本的问题,提出一种氨法碳捕集耦合化工品生产的新思路,分析了该过程的化学热力学趋势,而后通过模拟氨法碳捕集吸收溶液,利用Na2SO4与模拟吸收溶液中的NH4HCO3反应,得到制备Na2CO3的中间产物Na HCO3。实验结果表明,NH4HCO3浓度为2 mol/L时,NH4HCO3的转化率在50%~60%;NH4HCO3/Na2SO4的质量比R=1/1.3~1/2.1,随着R值减小,NH4HCO3的转化率逐渐升高;p H=7.5时,NH4HCO3最高可达50%的转化率,最佳反应时间为40~60 min。

Ammonia carbon capture technology has a significant advantage in CO2 removal rate,absorption capacity,equipment corrosion,byproducts resource utilization and other aspects. However,renewable ammonia carbon capture method has a problem of high operating costs. A new method of ammonia carbon capture coupled chemicals production was proposed. The thermodynamic trend was initially analyzed in the reaction process. In order to produce the intermediates Na HCO3 in preparing soda,a simulated carbon capture solution was prepared,its main component is NH4HCO3. The intermediates Na HCO3 was then obtained using the reaction of Na2SO4 with the simulated carbon capture solution. The experiment results show that the maximum value of the conversion rate of NH4HCO3 is about50%-60% under the NH4HCO3 concentration of 2 mol / L. When the molar ratio of NH4HCO3 to Na2SO4( R) is between 1 /1. 3-1 /2. 1,the NH4HCO3 conversion rate gradually increases with the decreasing R value. When p H value is 7. 5,the conversion rate of NH4HCO3 can be up to 50%. The optimum reaction time is 40-60 min.