Efficient desulfurization material and preparation method thereof
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A high-efficiency, carbon-based technology, applied in the field of desulfurization, can solve the problems of difficult activated carbon desulfurizer regeneration and recycling, weak hydrogen sulfide adsorption capacity, slow adsorption rate, etc. Effect
Inactive Publication Date: 2020-10-16
ZIBO PENGDA ENVIRONMENTAL PROTECTION TECH
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Problems solved by technology
[0003] Problems existing in existing products: (1) Existing desulfurization activated carbon has abundant micropores (<2nm). After the impregnation of active components is modified, the pore volume is further reduced, and the adsorption capacity for hydrogen sulfide is weak and the adsorption rate is slow. Lead to low sulfur capacity (15% to 25%)
(2) After the hydrogen sulfide is converted, the sulfur element is firmly deposited in the micropores, and it is difficult to regenerate and recycle the activated carbon desulfurizer
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Embodiment 1
[0024] (1) Add sodium hydroxide solution to 750kg of waste activated carbon to adjust the pH to 7, add 180kg of coal tar, 35kg of fennel powder and 35kg of potassium carbonate after dehydration and mix evenly, then add an appropriate amount of water to react, the reaction time is 1h, and the reaction is completed Post-granulation molding;
[0025] (2) Dry the molded material at 90°C until the moisture content is 20%, and then undergo secondary carbonization and steam reactivation at 600°C to obtain a high-efficiency desulfurization material.
[0026] In the pore structure of the prepared high-efficiency desulfurization material, mesoporous pores of 2-50 nm accounted for 52%, micropores below 2 nm accounted for 33%, and the rest were macropores above 50 nm.
Embodiment 2
[0028] (1) Add sodium hydroxide solution to 800kg sludge to adjust the pH to 8, add 120kg starch, 40kg ammonium bicarbonate and 40kg potassium carbonate after dehydration and mix well, then add appropriate amount of water to react, the reaction time is 1.5h, and the reaction is completed Post-granulation molding;
[0029] (2) Dry the molded material at 150°C until the water content is 30%, and then undergo secondary carbonization and steam reactivation at 800°C to obtain a high-efficiency desulfurization material.
[0030] In the pore structure of the prepared high-efficiency desulfurization material, mesopores of 2 to 50 nm accounted for 55%, micropores below 2 nm accounted for 35%, and the rest were macropores above 50 nm.
Embodiment 3
[0032] (1) Add sodium hydroxide solution to 850kg of oily sludge to adjust the pH to 10, add 100kg of bentonite, 25kg of turnip powder and 25kg of potassium carbonate after dehydration and mix evenly, then add appropriate amount of water to react, the reaction time is 1.5h, and the reaction Granulation after completion;
[0033] (2) Dry the molded material at 200°C until the water content is 25%, and then undergo secondary carbonization and steam reactivation at 850°C to obtain a high-efficiency desulfurization material.
[0034] In the pore structure of the prepared high-efficiency desulfurization material, mesopores of 2 to 50 nm accounted for 55%, micropores below 2 nm accounted for 35%, and the rest were macropores above 50 nm.
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Abstract
The invention belongs to the technical field of desulfurization, and particularly relates to an efficient desulfurization material and a preparation method thereof. The high-efficiency desulfurizationmaterial is prepared from industrial carbon-based solid waste, an adhesive, a pore-forming agent and an activating agent. The method comprises the following steps: (1) adjusting the industrial carbon-based solid waste to be alkaline, dehydrating, adding the adhesive, the pore-forming agent and the activating agent, uniformly mixing, adding water, reacting, and granulating and forming after the reaction is finished; and (2) drying the molded material, and carrying out secondary carbonization and water vapor reactivation treatment to obtain the finished product of the carbon-based composite adsorption material. According to the method, the industrial carbon-based solid waste is recycled; carrying out modification and pore size adjustment; after being impregnated with the active components,the desulfurization material is more suitable for gas-phase removal of hydrogen sulfide in the industries of coal chemical industry, petrochemical industry and the like, the sulfur capacity of the desulfurization material can reach 35% or above, and meanwhile, through reasonable pore size distribution, the converted elemental sulfur is deposited in a semi-firm state, is easier to desorb and regenerate, has high working capacity, can be recycled, and is energy-saving and environment-friendly.
Description
technical field [0001] The invention belongs to the technical field of desulfurization, and in particular relates to a high-efficiency desulfurization material and a preparation method thereof. Background technique [0002] At present, the commonly used desulfurization adsorption materials are coal-based activated carbon, wood activated carbon, etc., which are roasted, impregnated with active components, and dried to obtain desulfurized activated carbon. [0003] Problems existing in existing products: (1) Existing desulfurization activated carbon has abundant micropores (<2nm). After the impregnation of active components is modified, the pore volume is further reduced, and the adsorption capacity for hydrogen sulfide is weak and the adsorption rate is slow. Lead to low sulfur capacity (15% to 25%). (2) After the hydrogen sulfide is converted, the sulfur element is firmly deposited in the micropores, and it is difficult to regenerate and recycle the activated carbon desu...
Claims
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