Method for simultaneously removing hydrogen sulfide and ammonia gas by using iron-based ionic liquid
An iron-based ionic liquid, ionic liquid technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of complicated operation, long purification process flow, high sulfur capacity, and improve the low-temperature oxidative desulfurization rate. , The effect of reducing equipment costs and shortening the process flow
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[0025] Example 1 Using [bmim]FeCl 4 And [bmim] 3 PMo 12 O 40 Solution to remove H 2 S
[0026] [bmim] 3 PMo 12 O 40 And [bmim]FeCl 4 Prepare 50 mL desulfurization solution according to the volume ratio of 1 / 9. Mixed gas composition H 2 S is 1% (V), N 2 It is 99% (V). The sulphur conversion rate was 98% after 5h when it was passed into the solution at a flow rate of 30 ml / min. Then the previous solution was passed into air for regeneration for 8 hours, and the heating temperature was 40°C. When the mixed gas is fed again under the same conditions as above, the sulfur conversion rate is 98%. After 4 cycles in this way, the desulfurization performance of the solution did not decrease.
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[0027] Example 2 Using [bmim]FeCl 4 And [bmim] 3 PMo 12 O 40 Solution to remove NH 3
[0028] [bmim] 3 PMo 12 O 40 And [bmim]FeCl 4 Prepare 50 mL deammonia solution according to the volume ratio of 1 / 9. Mixed gas composition NH 3 1% (V), N 2 It is 99% (V). The flow rate of 30 ml / min was passed into the solution, and the deamination efficiency was 99% after 5h. Then add 12ml of concentrated phosphoric acid to the previous solution, and the heating temperature is 40°C. When the mixed gas is fed again under the same conditions as above, the ammonia removal efficiency is 99%. After 4 cycles of this, the deamination performance of the solution did not decrease.
Example Embodiment
[0029] Example 3 Using [bmim]FeCl 4 And [bmim] 3 PMo 12 O 40 The solution simultaneously removes H 2 S and NH 3
[0030] [bmim] 3 PW 12 O 40 And [bmim]FeCl 4 According to the volume ratio of 1 / 9, prepare 50 mL desulfurization and deamination solution. The mixed gas composition is H 2 S (1.0g / m 3 ), NH 3 (1.0g / m 3 ). Into the solution at a flow rate of 30 ml / min, the sulfur conversion rate after 5h is 98%, and the ammonia removal efficiency is 99%. Then add 12ml of concentrated phosphoric acid to the previous solution, and air it for regeneration for 8 hours, and the heating temperature is 40°C. When the mixed gas is fed again under the same conditions as above, the sulfur conversion rate is 98%, and the ammonia removal efficiency reaches 99%. This cycle 4 times, the desulfurization and denitrification efficiency of the solution did not decrease.
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