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Preparation method of medium temperature desulfurating agent

A desulfurizer, medium-temperature technology, applied in 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: 2011-07-27
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
  • Preparation method of medium temperature desulfurating agent

Examples

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Embodiment approach 1

[0030] The concentration of 100ml is 2.87×10 -4 mol / ml manganese acetate solution and 20g of γ-Al 2 o 3Put it into a supercritical water reactor. Then heat the reactor to make the reactants reach the supercritical state of water at 380°C and 21.8MPa, and stay in the reactor for 30 minutes to react. After the reaction is over, 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 reaction tank. After the reaction kettle is cooled, the solid-phase product can be taken out to obtain the medium temperature desulfurizer called in the present invention, which is loaded on the carrier γ-Al 2 o 3 The mass percentage of manganese oxide is 10.8%, and this 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 carry out five desulfurization cycles at 400°C. Th...

Embodiment approach 2

[0032] The concentration of 100ml is 2.87×10 -4 mol / ml manganese nitrate solution and 20g of γ-Al 2 o 3 Put it into a supercritical water reactor. Then heat the reactor to make the reactants reach the supercritical state of water at 380°C and 21.8MPa, and stay in the reactor for 60 minutes to react. Other steps are as in the first embodiment, the intermediate temperature desulfurizer of the present invention is obtained, and it is loaded on the carrier γ-Al 2 o 3 The mass percent content of manganese oxide on it is 11.2%. The 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 produced 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 is removed from 400ppm at the inlet to <0.5ppm, but after the fifth regeneration, it can only be removed to <1ppm.

Embodiment approach 3

[0034] The concentration of 100ml is 2.87×10 -4 mol / ml copper nitrate solution and 20g γ-Al 2 o 3 Put it into a supercritical water reactor. Then heat the reactor to make the reactants reach the subcritical state of water at 350°C and 14.8MPa, and stay in the reactor for 15 minutes to react. Other steps are as in the first embodiment, the intermediate temperature desulfurizer of the present invention is obtained, and it is loaded on the carrier γ-Al 2 o 3 The mass percent content of the upper 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 (after 10 minutes of desulfurization, the concentration at the outlet reaches more than 10ppm), and the mechanical strength of the fresh, 400°C and 450°C desulfurizers are respectively 9.06 , 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 discloses a method for preparing a medium-temperature desulfurizer, which belongs to the fields of preparation of desulfurizers and gas purification in the application of coal chemical technology. Specifically, it relates to a method for preparing a medium-temperature desulfurizer by utilizing subcritical and supercritical water. Background technique [0002] The status of China's energy resources determines that China is a country with coal as 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 already caused serious air pollution. 85% of sulfur dioxide and carbon dioxide, 70% of soot, and 60% of nitrogen oxides come from coal combustion, which has already been "excessive emission" in terms of environmental capacity. It is imperative to take effective measures to reduce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J37/10B01J23/72B01J23/34B01J23/06C10K1/34C10L3/10
CPCY02P20/54
Inventor 鲍卫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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