三种硫化氢吸收剂吸收效率对比及碘酸钾体系吸收条件优化研究

doi:10.11949/0438-1157.20191151

Abstract

Abstract:

Hydrogen sulfide is corrosive and toxic, and the use of absorbents to absorb hydrogen sulfide gas is an important desulfurization treatment. The absorption efficiency of different absorbent is different. The absorption efficiency of three different hydrogen sulfide absorbent, namely ferric chloride system, potassium iodate system and alkaline potassium ferricyanide system, was firstly compared. Based on this, the absorption parameters of potassium iodate system were optimized, and the effects of concentration, temperature, pH, gas flow rate and time on the hydrogen sulfide gas absorption efficiency were discussed. The optimum absorption conditions were obtained by orthogonal test: temperature 55℃, pH 6.01, H₂S flow rate 0.3 L·min^-1, absorption time 1 min, the third-order absorption efficiency of 8%(mass) potassium iodate is 51.56%. The results of this study provide a theoretical reference for the absorption of hydrogen sulfide and support for the study of indirect electrolysis process.

Key words: gas, absorption, optimization, hydrogen sulfide, absorption efficiency, potassium iodate

CLC Number:

TQ 125.1

Xue LYU, Yue MOU, Yiwen MIU, Hanlu LIAO, Jiansu RAN, Jie ZHENG. Comparison of absorption efficiency of three hydrogen sulfide absorbents and optimization of absorption conditions of potassium iodate system[J].CIESC Journal, 2020, 71(10): 4696-4703.

Figures/Tables 10

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序号	碘酸钾质量浓度	三级吸收效率 η/%	反应前 pH	反应后pH
序号	碘酸钾质量浓度	三级吸收效率 η/%	反应前 pH	1^#吸收管	2^#吸收管	3^#吸收管
1	0.01	5.79	4.42	1.71	1.64	1.60
2	0.03	12.53	5.25	1.38	1.25	1.22
3	0.05	18.33	5.48	1.35	1.18	1.18
4	0.06	21.39	5.83	1.19	1.14	1.13
5	0.08	26.35	6.27	1.13	1.00	0.94

实验号	因素水平				三级吸收效率/%
实验号	A	B	C	D	三级吸收效率/%
1	1(0.3)	1（1)	1(26.5)	1(1.93)	51.26
2	1	2(2)	2(40)	2(6.01)	52.27
3	1	3(3)	3(55)	3(10.11）	50.12
4	2(0.67）	1	2	3	32.87
5	2	2	3	1	38.96
6	2	3	1	2	30.34
7	3（1）	1	3	2	45.36
8	3	2	1	3	30.10
9	3	3	2	1	22.83
k₁	51.21	43.16	37.23	37.68
k₂	34.06	40.44	35.99	42.65
k₃	32.76	34.43	44.81	37.70
极差R	18.45	8.73	8.83	4.97
优化水平	A1	B1	C3	D2
因素影响顺序	A>C>B>D

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Comparison of absorption efficiency of three hydrogen sulfide absorbents and optimization of absorption conditions of potassium iodate system

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