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Petroleum coke devulcanizing method

A technology for petroleum coke and desulfurization temperature, which is applied in the fields of materials, chemical industry, environmental protection and metallurgy to achieve the effect of reducing sulfur content, reducing environmental protection pressure, and implementing a simple and convenient process.

Inactive Publication Date: 2015-10-28
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the temperature is controlled at 850-900°C, quartz sandstone and limestone need to be added during the operation process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take 3g of a high-sulfur coke in China, the measured sulfur content is 6.5wt.%, crush it to less than 0.5 mm, and MoO with a particle size of less than 0.075mm 2 0.0001g of powder and 0.0002g of NiO powder with a particle size of less than 0.075mm were fully mixed and spread in a 2×3cm flat-bottomed square porcelain boat. Then put the porcelain boat filled with coke in the furnace, heat it at a heating rate of 7°C / Min, and pass in ammonia gas (the pressure of ammonia gas in the reaction furnace is kept at 1 atmosphere), and then keep it at 800°C for 120min . Finally, the coke was taken out for sulfur measurement, and it was found that the sulfur content had dropped to 1.29wt.%, and the desulfurization rate was 80.1%.

Embodiment 2

[0037] Take 3g of a high-sulfur coke in China, the measured sulfur content is 6.5wt.%, crush it to less than 0.5 mm, and MoO with a particle size of less than 0.1mm 2 0.0001g of NiO powder and 0.0002g of NiO powder with a particle size of less than 0.1mm were fully mixed and spread in a 2×3cm flat-bottomed square porcelain boat. Then put the porcelain boat filled with coke in the furnace, heat it at a heating rate of 7°C / Min, and pass in ammonia gas (the pressure of ammonia gas in the reaction furnace is kept at 1 atmosphere), and then keep it at 700°C for 120min . Finally, the coke was taken out for sulfur measurement, and the desulfurization rate was found to be 79.9%.

Embodiment 3

[0039]Take 3g of a high-sulfur coke in China, the measured sulfur content is 6.5wt.%, crush it to less than 0.5 mm, and MoO with a particle size of less than 0.1mm 2 0.001g of NiO powder and 0.002g of NiO powder with a particle size of less than 0.1mm were fully mixed and spread in a 2×3cm flat-bottomed square porcelain boat. Then put the porcelain boat filled with coke in the furnace, heat it at a heating rate of 7°C / Min, and pass in ammonia gas (the pressure of ammonia gas in the reaction furnace is kept at 1 atmosphere), and then keep it at 900°C for 120min . Finally, the coke was taken out for sulfur measurement, and the desulfurization rate was found to be 80.7%.

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Abstract

The invention discloses a petroleum coke devulcanizing method. Mixing, heating and heat preserving are conducted on petroleum coke and trace catalyst in the ammonia atmosphere, and therefore the purpose of devulcanizing is achieved. The mass ratio of petroleum coke particles and compound catalyst is (10000-100):1, the temperature is raised to 700-900 DEG C, and heat preserving is conducted for 30-120 min. NiO and MoO2 with the granularity smaller than or equal to 0.1 mm are adopted in the compound catalyst, and the mass ratio of NiO and MoO2 is (4-2):1. According to the petroleum coke devulcanizing method, under the condition of not consuming much heat energy and not affecting the performance of the petroleum coke, the effect of ammonia atmosphere devulcanizing can be further improved through the means of adding the trace catalyst.

Description

technical field [0001] The invention relates to a method for desulfurizing petroleum coke, which is applied in the technical fields of metallurgy, material, chemical industry and environmental protection. Background technique [0002] Petroleum coke is the main by-product of the petroleum refining industry and is generally produced by the delayed coking process. Because of its low ash content and high fixed carbon content, petroleum coke is widely used in metallurgy, materials and chemical industries. At the same time, due to the different sulfur content in petroleum coke, petroleum coke is divided into high sulfur (>4%), medium sulfur (2-4%) and low sulfur coke (<2%). However, with the deterioration and acidification of international crude oil, the quality of petroleum coke, a by-product of petroleum refining, is gradually decreasing, especially the sulfur content in petroleum coke is constantly increasing. Excessive sulfur content in petroleum coke will greatly aff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02
Inventor 肖劲仲奇凡余柏烈黄金堤李发闯
Owner CENT SOUTH UNIV