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Preparation method of medium temperature desulfurating agent

A desulfurizer and medium-temperature technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve the effects of wide applicability, improved stability, and simple process flow

Inactive Publication Date: 2009-12-30
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method of using subcritical and supercritical water to prepare medium temperature desulfurizer has no patents or any literature reports at home and abroad

Method used

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  • Preparation method of medium temperature desulfurating agent
  • Preparation method of medium temperature desulfurating agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0030] Set the concentration of 100ml to 2.87×10 -4 mol / ml manganese acetate solution and 20g γ-Al 2 O 3Put it into the supercritical water reactor. Then the reactor was heated to make the reactants reach the supercritical state of water at 380°C and 21.8MPa, and the reactor stayed in the reactor for 30 minutes to react. After the reaction, the reaction product is separated in the gas-liquid separation tank by reducing the pressure, and the solid phase product remains at the bottom of the reactor. After the reaction kettle is cooled, the solid phase product can be taken out to obtain the intermediate temperature desulfurizer referred to in the present invention, which is supported on the carrier γ-Al 2 O 3 The mass percentage of manganese oxide above is 10.8%, and the desulfurizer can be directly used for desulfurization activity evaluation without subsequent treatment. Fill 10ml of the above-mentioned desulfurizer in a fixed-bed quartz reactor, and conduct five desulfurization cy...

Embodiment approach 2

[0032] Set the concentration of 100ml to 2.87×10 -4 mol / ml manganese nitrate solution and 20g γ-Al 2 O 3 Put it into the supercritical water reactor. Then the reactor was heated to make the reactants reach the supercritical state of water at 380°C and 21.8MPa, and the reactor stayed in the reactor for 60 minutes to react. The other steps are the same as in the first embodiment. The intermediate temperature desulfurization agent of the present invention is prepared, which is supported on the carrier γ-Al 2 O 3 The mass percentage of manganese oxide above is 11.2%. Desulfurization evaluation at 400°C shows that the mechanical strength of the desulfurizer after 5 cycles is between 12.99-14.05N / mm (the fresh desulfurizer prepared in this embodiment is 14.98N / mm), and the desulfurization accuracy is slightly reduced. The desulfurization accuracy of fresh desulfurizer can reduce H 2 S depleted from 400ppm at the inlet to <0.5ppm, and after the fifth regeneration, it can only be desorbed...

Embodiment approach 3

[0034] Set the concentration of 100ml to 2.87×10 -4 mol / ml copper nitrate solution and 20g γ-Al 2 O 3 Put it into the supercritical water reactor. Then the reaction kettle is heated to make the reactants reach the subcritical state of water at 350° C. and 14.8 MPa, and the reaction kettle stays for 15 minutes for reaction. The other steps are the same as in the first embodiment. The intermediate temperature desulfurization agent of the present invention is prepared, which is supported on the carrier γ-Al 2 O 3 The mass percentage of copper oxide is 10.0%. The desulfurization results at 400°C and 450°C show that the desulfurization accuracy of this desulfurizer is very poor (10min after desulfurization, the outlet concentration reaches more than 10ppm), and the mechanical strength of the desulfurizer after desulfurization at 400°C and 450°C is 9.06, respectively. , 8.86, 9.00N / mm.

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Abstract

The invention provides a preparation method of a medium temperature desulfurating agent, belonging to the field of the preparation of desulfurating agent and gas purification in coal chemical industry technology application, in particular relating to a method for preparing medium temperature desulfurating agent by utilizing subcritical and supercritical water. The invention is characterized in that carrier materials are carried with metal oxide with desulfurization activity by utilizing a thermosynthesis reaction between subcritical water and supercritical water and strong infiltration effect of subcritical and supercritical water. In the invention, a medium temperature desulfurating agent with the characteristics of high desulfurization precision, good cycling stability, high mechanical strength and the like is prepared within a temperature range of 250-450 DEG C by fully utilizing the characteristics of subcritical and supercritical water; the invention has little contamination on the environment, has simple technology, and can be applied to the removal of H2S in medium temperature coal gas or natural gas.

Description

Technical field [0001] The invention provides a method for preparing an intermediate temperature desulfurizer, which belongs to the field of preparation and gas purification of desulfurizers in the application of coal chemical technology. Specifically, it relates to a method for preparing an intermediate temperature desulfurizer by using subcritical and supercritical water. Background technique [0002] The state of China's energy resources determines that China is a country where coal is the main source of energy. On the one hand, coal resources are the main provider of energy, and on the other hand, they are also the main source of environmental pollution. The coal-based energy consumption structure has caused serious air pollution. 85% of sulfur dioxide and carbon dioxide, 70% of soot, and 60% of nitrogen oxides come from burning coal, which has been "super-emitted" in terms of environmental capacity. It is urgent to take effective measures to reduce pollutant emissions. [00...

Claims

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Application Information

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IPC IPC(8): B01J37/10B01J23/72B01J23/34B01J23/06C10K1/34C10L3/10
CPCY02P20/54
Inventor 鲍为仁王建成韩丽娜常丽萍司伟平邱彪谢克昌
Owner TAIYUAN UNIV OF TECH
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