Absorbent for cyclically absorbing sulfur dioxide gas in natural gas tail gas and its application
A sulfur dioxide and absorbent technology, applied in gas treatment, chemical instruments and methods, separation methods, etc., can solve the problems of unfavorable regenerated acid gas subsequent utilization, lower absorption efficiency, equipment corrosion, etc., and achieve favorable subsequent utilization and solvent performance The effect of stabilization and reduction of purification cost
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Embodiment 1
[0036] In terms of mass percentage, the absorbent for circulating and absorbing sulfur dioxide gas in natural gas tail gas in this embodiment includes the following components: 50wt% of hexamethylenetetramine, 5wt% of 2-(2-diethylaminoethoxy)ethanol , 20wt% of 1,3-dimethyl-2-imidazolidinone, 0.5wt% of coconut oil fatty acid acyldiethanolamine, 1wt% of hydroquinone, 2wt% of sodium gluconate and the rest of water.
[0037] Use this absorbent at a temperature of 55°C for SO 2 It can desulfurize 0.3wt% natural gas tail gas, the desulfurization time is 30min, and the desulfurization rate is 95.1%. Extraction absorbs SO 2 100ml of rich desulfurization solution was desorbed and regenerated at a temperature of 85°C. After 30 minutes of desorption experiment, the desorption rate was 96.3%.
[0038] The simulated absorption and desorption experiment of the absorbent: the above-mentioned absorbent of the present embodiment is placed in the gas absorption device and the gas absorption d...
Embodiment 2
[0040] In terms of mass percentage, the absorbent for circulating and absorbing sulfur dioxide gas in natural gas tail gas in this embodiment includes the following components: 30wt% of N-methylcaprolactam, 6wt% of 2-(2-diethylaminoethoxy)ethanol and 4wt% of 2-(2-tert-butylamino) propoxyethanol, 30wt% of 1,3-dimethyl-2-imidazolidinone, 1wt% of coconut oil fatty acyldiethanolamine, 1wt% of terephthalate Phenol, 2wt% sodium gluconate and the balance of water.
[0041] Use this absorbent at a temperature of 35 °C for SO 2 It can desulfurize 0.1wt% natural gas tail gas, the desulfurization time is 30min, and the desulfurization rate is 96.3%. Extraction absorbs SO 2 100ml of rich desulfurization solution was desorbed and regenerated at a temperature of 90°C. After 30 minutes of desorption experiment, the desorption rate was 95.9%.
[0042] The simulated absorption and desorption experiment of the absorbent: the above-mentioned absorbent of the present embodiment is placed in th...
Embodiment 3
[0044] In terms of mass percentage, the absorbent for circulating and absorbing sulfur dioxide gas in natural gas tail gas in this embodiment includes the following components: 40wt% triethylenediamine, 10wt% 2-(2-diethylaminoethoxy)ethanol, 15wt% % of 1,3-dimethyl-3,4,5,6-tetrahydro-2-pyrimidinone and 10 wt% of 1,3-dimethyl-3,4,5,6-tetrahydro-2- Pyrimidinone, 1.5wt% coconut oil fatty acid acyldiethanolamine, 2wt% hydroquinone, 2wt% sodium gluconate and the rest of water.
[0045] This absorbent was used at a temperature of 30 °C for SO 2 It can desulfurize 0.2wt% natural gas tail gas, the desulfurization time is 30min, and the desulfurization rate is 96.1%. Extraction absorbs SO 2 100ml of rich desulfurization solution was desorbed and regenerated at a temperature of 90°C. After 30 minutes of desorption experiment, the desorption rate was 97.2%.
[0046] The simulated absorption and desorption experiment of the absorbent: the above-mentioned absorbent of the present embodi...
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