Petroleum coke desulfurizing method

A petroleum coke and removal technology, applied in the field of petroleum coke desulfurization, can solve problems such as complex operation process, achieve the effect of wide sources, cheap price, and reduce environmental pressure

Inactive Publication Date: 2015-05-13
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The operation process of this scheme is complicated, and it is different from the ammonia atmosphere desulfurization of this patent application

Method used

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  • Petroleum coke desulfurizing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take 5g of a domestic high-sulfur petroleum coke whose sulfur content is measured to be 6.5wt%, crush it to less than 1mm, and lay it flat in a 2×3cm flat-bottomed square porcelain boat. Then put the porcelain boat filled with petroleum coke into the furnace and heat it at a heating rate of 7°C / Min. When the temperature is raised to 600°C, heat preservation is carried out for 2 hours, and then ammonia gas is introduced (the pressure of ammonia gas in the reaction furnace is maintained at 1 atmosphere) and the temperature is raised to 800°C at 7°C / Min, and then kept at 800°C for 2 hours. Finally, the petroleum coke was taken out for sulfur measurement, and it was found that the sulfur content had dropped to 1.81wt%, and the desulfurization rate was 72.3%. Comparison of desulfurized back coke and desulfurized front coke Figure 1-4 As shown, from a microscopic point of view, the microstructure of petroleum coke does not change significantly after ammonia gas desulfuriz...

Embodiment 2

[0037] Take 5g of a medium-sulfur petroleum coke in China, whose sulfur content was measured to be 3.6wt%, crush it to less than 1mm, and lay it flat in a 2×3cm flat-bottomed square porcelain boat. Then put the porcelain boat filled with petroleum coke into the furnace and heat it at a heating rate of 7°C / Min. When the temperature is raised to 600°C, heat preservation is carried out for 2 hours, and then ammonia gas is introduced (the pressure of ammonia gas in the reaction furnace is maintained at 1 atmosphere) and the temperature is raised to 800°C at 7°C / Min, and then kept at 800°C for 2 hours. Finally, the petroleum coke was taken out for sulfur measurement, and it was found that the sulfur content had dropped to 0.98wt%, and the desulfurization rate was 72.8%.

Embodiment 3

[0039] Take 5g of a domestic low-sulfur petroleum coke whose sulfur content was measured to be 1.8wt%, crush it to less than 1 mm, and lay it flat in a 2×3cm flat-bottomed square porcelain boat. Then put the porcelain boat filled with petroleum coke into the furnace and heat it at a heating rate of 7°C / Min. When the temperature is raised to 600°C, heat preservation is carried out for 2 hours, and then ammonia gas is introduced (the pressure of ammonia gas in the reaction furnace is maintained at 1 atmosphere) and the temperature is raised to 800°C at 7°C / Min, and then kept at 800°C for 2 hours. Finally, the petroleum coke was taken out for sulfur measurement, and it was found that the sulfur content had dropped to 0.51wt%, and the desulfurization rate was 71.7%.

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Abstract

The invention discloses a petroleum coke desulfurizing method. The petroleum coke desulfurizing method comprises the following steps: heating petroleum coke to 400-700 DEG C for precalcining for a certain time first, and then in an ammonia gas atmosphere, heating green petroleum coke to 700-1000 DEG C and preserving heat for a certain time so as to achieve a desulfurizing aim. By the petroleum coke desulfurizing method, most of sulfur in the petroleum coke is removed under the conditions that more heat is not consumed and the microstructure and physical and chemical properties of the petroleum coke are not affected, so that the sulfur content of the petroleum coke is greatly reduced, the quality of the petroleum coke is improved, and the environmental pressure of a carbon product industry with the petroleum coke as a raw material is greatly reduced; therefore, the petroleum coke desulfurizing method is wide in application prospect.

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): C10L9/00C10L9/02C01B31/02
Inventor 肖劲仲奇凡张燕冰李劼
Owner CENT SOUTH UNIV
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