Iron-base desulfurizer for catalyzing, translating and absorbing carbonyl sulfur at middle-low temperature and preparation thereof

A catalytic conversion and desulfurization agent technology, which is applied in combustible gas purification, combustible gas purification/transformation, petroleum industry, etc., can solve the problems of high reaction temperature, increased energy consumption, side reactions, etc., and achieve high desulfurization accuracy, low cost, Concentration adaptation to a wide range of effects

Inactive Publication Date: 2007-10-17
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] It can be seen that the effective use temperature of organic sulfur hydrogenation conversion desulfurizers is mostly above 350°C. On the one hand, the high reaction temperature will increase the energy consumption due to repeated heating and cooling of the gas during use. On the other hand, in the presence of carbon oxides Under the circumstances, a series of s...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Weigh Fe 2 o 3 15g, CeO 2 5g, grind to less than 100 mesh, add ZnO 0.5g, MgO 0.3g, γ-Al 2 o 3 1.5g, ZrO 2 1g, 3g of binder (kaolin), mechanically mixed, then add 0.5g of pore-forming agent (sodium carboxymethylcellulose), extruded with appropriate amount of water, baked at 120°C for 12 hours, calcined at 450°C for 4 hours, A finished desulfurizer is obtained.

[0031] (2) Put the finished desulfurizer at a space velocity of 500h -1 , containing 10% H 2 N 2 Under the atmosphere, heat up to 350°C at a rate of 60°C / h and stay for 6 hours, take it out, and keep it sealed.

[0032] (3) The desulfurizer test is at normal pressure, organic sulfur (mainly COS, a small amount of CS 2 ) import concentration 100~5000×10 -6 , Airspeed 1000h -1 , and the reaction temperature is carried out at 245-325°C. Reactor outlet organic sulfur concentration -6 , The desulfurizer penetrates 17-25% of the sulfur capacity.

Embodiment 2

[0034] (1) Weigh Fe 2 o 3 14g, CeO 2 4g, MnO 2 4g, grind to less than 100 mesh, add CuO 0.5g, MgO 0.1g, γ-Al 2 o 3 1.5g, ZrO 2 1g, 4g of binder (bentonite, etc.), mechanically mixed, then added 0.7g of pore-forming agent (polyvinyl alcohol and natural flake graphite), extruded with appropriate amount of water, baked at 135°C for 6 hours, and calcined at 450°C for 8 hours to get the finished desulfurizer.

[0035] (2) Put the finished desulfurizer at a space velocity of 500h -1 , containing 10% H 2 N 2 Under the atmosphere, heat up to 350°C at a rate of 60°C / h and stay for 6 hours, take it out, and keep it sealed.

[0036] (3) The desulfurizer test is at normal pressure, organic sulfur (mainly COS, a small amount of CS 2 ) import concentration 100~5000×10 -6 , Airspeed 1000h -1 , The reaction temperature is 245 ~ 325 ℃. Reactor outlet organic sulfur concentration -6 , The desulfurizer penetrates 20-26% of the sulfur capacity.

Embodiment 3

[0038] (1) Weigh Fe 2 o 3 15g, CeO 2 2g, MnO 2 4g, grind to less than 100 mesh, add CuO 0.5g, MgO 0.1g, K 2 O 0.1g, γ-Al 2 o 3 3.0g, ZrO 2 1g, 3g of binder (bentonite, etc.), mechanically mixed, then add 0.8g of pore-forming agent (carboxymethyl cellulose and natural flake graphite), extruded with appropriate amount of water, baked at 120°C for 10 hours, at 650°C Calcined for 2 hours to obtain the finished desulfurizer.

[0039] (2) Put the finished desulfurizer at a space velocity of 500h -1 , containing 10% H 2 N 2 Under the atmosphere, heat up to 350°C at a rate of 60°C / h and stay for 6 hours, take it out, and keep it sealed.

[0040] (3) The desulfurizer is tested at normal pressure, and the concentration of organic sulfur at the inlet is 100-5000×10 -6 , Airspeed 1000h -1 , The reaction temperature is 245 ~ 325 ℃. Reactor outlet organic sulfur concentration -6 , The desulfurizer penetrates 18-24% of the sulfur capacity.

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Abstract

The invention relates to a preparation of catalyzing and transforming-absorbing Fe-desulphurizer by high accuracy carbonyl sulfur at medium and low temperature, which has a good hydrogenation effect to the carbonyl sulfur and absorbs the produced carbonyl sulfur. The invention can be used to accurately remove the carbonyl sulfur in the ammonia material gas, coke oven gas, natural gas and composed gas. The desulphurizer is provided with primary active components Fe2O3, CeO2, MnO2, Ni2O3, and secondary components CuO, ZnO, MgO, K2O and etc, and the carriers are Al2O3, ZrO2, and residual binding agent and expanding drilling agent, and water. The process has a reacting temperature of 150-350 DEG C, an airspeed of 500-2000h-1, a carbonyl sulfur concentration in the gas from minim to 5000ppm. The inventive desulphurizer has a high catalytic transforming capacity with a carbonyl sulfur converting ratio more than 99%.

Description

technical field [0001] The invention relates to a catalytic conversion-absorption desulfurizer for carbonyl sulfide in gas and a preparation method thereof, in particular to a desulfurizer for hydrogenation conversion and absorption of carbonyl sulfide and a preparation method thereof. technical background [0002] With the development of industrial technology, the market for the production of methanol, dimethyl ether, oil products and other chemical products from heavy oil, natural gas and coal is very active. In addition to the influence of conventional factors, the length of catalyst life in the synthesis process is a key factor affecting the cost, and the substances that cause catalyst poisoning are mainly sulfur-containing gases, mainly hydrogen sulfide and carbonyl sulfide. In recent years, due to rising prices of coal, oil and electricity, some chemical fertilizer plants and alcohol plants have used low-priced low-quality coal and high-sulfur coal to produce gas, resu...

Claims

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Application Information

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IPC IPC(8): C10K1/20
Inventor 张德祥赵海高晋生伍星亮杨讼佳
Owner EAST CHINA UNIV OF SCI & TECH
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