Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, People's Republic of China.
Environ Sci Pollut Res Int. 2021 Feb;28(5):5822-5832. doi: 10.1007/s11356-020-10968-w. Epub 2020 Sep 25.
To high efficiently remove HS from low partial pressure coke oven gas (COG), a novel activator (tetramethylammonium arginine, [N][Arg]) was used to blend with N-methyldiethanolamine (MDEA) for the absorption of HS. High concentrated [N][Arg]-MDEA aqueous solution was used as absorbent. Thermodynamic properties including absorption amount and HS loading values were measured, then the kinetic apparent absorption rate was calculated based on the change of absorption amount with time. The removal efficiency of HS in simulated COG was verified in tray towers. Compared with monoethanolamine (MEA)-MDEA and tetramethylammonium glycinate ([N][Gly])-MDEA aqueous solutions, [N][Arg]-MDEA aqueous solution takes advantages of higher absorption capacity, absorption rate and removal efficiency. Our results showed that the proposed absorbent has good industrial application prospect in coke oven gas desulfurization, because it achieved 100% removal of HS in the tray tower containing only 4 sieve plates under high concentrated condition (water content < 45%), which may significantly decrease the energy consumption.
为了高效去除低分压焦炉煤气（COG）中的 H2S，采用一种新型活化剂（四甲基胍精氨酸，[N][Arg]）与 N-甲基二乙醇胺（MDEA）混合用于 H2S 的吸收。高浓度[N][Arg]-MDEA 水溶液用作吸收剂。测量了包括吸收量和 H2S 负载值在内的热力学性质，并根据吸收量随时间的变化计算了动力学表观吸收速率。在填料塔中验证了模拟 COG 中 H2S 的去除效率。与单乙醇胺（MEA）-MDEA 和四甲基氨基甘氨酸（[N][Gly]）-MDEA 水溶液相比，[N][Arg]-MDEA 水溶液具有更高的吸收容量、吸收速率和去除效率。研究结果表明，由于在仅包含 4 个筛板的填料塔中，在高浓度条件下（含水量<45%）即可实现 H2S 的 100%去除，该新型吸收剂在焦炉煤气脱硫方面具有良好的工业应用前景，这可能显著降低能耗。
