Method for preparing active semicoking H2S desulphurizer

A technology of active semi-coke and desulfurizer, which is applied in chemical instruments and methods, catalysts for physical/chemical processes, selection of absorbing solid gas purification, etc. , the effect of broad application prospects

Inactive Publication Date: 2005-06-01
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, due to the soaring price of coal-based activated carbon, the application of these desulfurizers has been limited; on the other hand, the disposal of activated carbon waste desulfurizers is also an important issue

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0023] Mix the 4-10 mesh particles obtained after sieving the bituminous coal semi-coke with water at a volume ratio of 1:0.83 and then add it to the high-pressure reactor. React for 4 hours, take it out after natural cooling, then measure its specific surface area and pore volume, and fill 30ml in a fixed-bed reactor to measure its desulfurization activity. The inner diameter of the reactor is 20 mm, and the height of the reactor bed is 100 mm. The results are shown in Table 1.

[0024] Table 1. Activated semi-coke H after hydrothermochemical modification under different pressures 2 S desulfurizer specific surface area and pore volume

[0025] The change of and its influence on the sulfur capacity

[0026] Sample Raw coke 8atm 10atm 12atm 14atm 43atm

[0027] Specific surface area m 2 / g 49.19 1115.84 610.35 414.74 510.63 482.64

[0028] Pore ​​volume ml / g 0.0351 0.4593 0.3412 0.1310 0.2470 0.3214

[0029] Sulfur capacity gH 2 S / 100gC 3.11 3.63 6...

Embodiment 6～10

[0033] The modified semi-coke obtained according to the preparation method described in Examples 1 to 5 is impregnated with an equal volume of copper ammonia complex solution at room temperature, so that the amount of CuO accounts for 8.0% of the total weight of the semi-coke, and placed for 24 hours, then 700℃ and space velocity 1000h -1 Next N 2 Roasting treatment in the atmosphere for 6h activation. Then measure its desulfurization activity (the method is the same as 1). The results are shown in Table 2.

[0034] Table 2. Pressurized hydrothermochemical modification of semi-coke, equal volume impregnation modification with cuproammonia complex solution and 700℃N 2

[0035] Sulfur capacity change after activation

[0036] Sample Raw coke 8atm 10atm 12atm 14atm 43atm

[0037] Breakthrough time h 1.5 11.5 14 15 15.5 15.9

[0038] Sulfur capacity gSO 2 / 100gC 3.11 8.20 9.46 12.78 14.50 16.84

[0039]Test conditions: temperature: 40°C; space velo...

Embodiment 11～13

[0042] The active semi-coke H obtained according to the preparation method described in Example 7 2 S desulfurizer (the desulfurizer was prepared at 40atm) was used to conduct desulfurization / regeneration experiments with two towers connected in series, and the results are shown in Table 3.

[0043] Table 3. Active semi-coke H 2 Relationship between S desulfurizer regeneration times and sulfur capacity

[0044] Sample one time two times three times

[0045] Sulfur capacity (gS / 100Gc) 12.30 11.82 12.23

[0046] Regeneration conditions: room temperature at air speed 50h -1 Air was passed for 40 hours.

[0047] It can be seen that after three times of desulfurization regeneration, the desulfurization activity has not decreased significantly. Explain that the active semi-coke H 2 The desulfurization potential of S desulfurizer is huge.

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Abstract

The present invention discloses the preparation process of active semi-coke H2S desulfurizer. The active semi-coke H2S desulfurizer is prepared with lignite semi-coke, anthracite or soft coal semi-coke and other carbon containing material and through first pressurized hydrothermal chemical modification, subsequent soaking with cuprammonia, CuSO4 solution or K2CO3 solution, drying and high temperature calcining. The present invention has the features of wide material source, low cost, repeated use of the adsorbent product, final use in waste water treatment and as fuel and no secondary pollution. The present invention may be used widely in purifying gas in various plants and environment protecting industry.

Description

technical field [0001] The invention relates to a preparation method of gas purification and desulfurization agent in production plants such as synthetic ammonia, urea, alcohol, coking plant, gas plant and environmental protection industry using petroleum, coal and natural gas as raw materials, more specifically an active Semi focus H 2 The preparation method of S desulfurizer. Background technique [0002] my country's synthetic ammonia, urea, and alcohol plants take the three major carbon-containing resources of oil, coal and natural gas as raw materials, accounting for the vast majority, of which about 70% use coal as raw materials. At present, due to rising oil prices, some coking plants, gas plants and other production plants are also considering using coke oven gas as raw material to synthesize methanol and synthetic ammonia; The gas fertilizer production process was also changed to "coal head". At the same time, in order to save energy consumption, the low-pressure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01J21/18C01B31/08C10K1/32
Inventor 李春虎
Owner OCEAN UNIV OF CHINA
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