Preparation method of synthesis gas by gasifying carbonaceous materials

A synthesis gas and carbon-based technology, applied in the direction of granular/powdered fuel gasification, bulk chemical production, etc., can solve the problems of reducing the efficiency of the gasification process, and meet the requirements of high heat utilization rate, strong adaptability, and equipment low effect

Active Publication Date: 2011-11-09
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using oxygen or air as the gasification agent, the gasification process is an exothermic process, and the equilibrium constant and reaction rate are very large. The disadvantage is that the target gasification product CO is easy to further react with oxygen to form CO 2 , reducing the efficiency of the gasification process

Method used

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  • Preparation method of synthesis gas by gasifying carbonaceous materials
  • Preparation method of synthesis gas by gasifying carbonaceous materials
  • Preparation method of synthesis gas by gasifying carbonaceous materials

Examples

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Embodiment 1

[0039] In this example, delayed coking petroleum coke was used as the carbonaceous material, the properties of which are listed in Table 1, and calcium carbonate was used as the gasification catalyst. Petroleum coke and calcium carbonate (analytically pure) were mixed uniformly at a mass ratio of 95:5, dried at 150°C for 10 minutes, and then pulverized and ground to a particle size range of 10-200 mesh (0.075-2.00mm). The above-mentioned solid particles are divided into two streams according to a certain ratio, and the mixed gas composed of oxygen + water vapor containing different oxygen content is respectively entered into different reaction zones of the gasifier for gasification reaction. At the top of the gasifier, the reaction residual solids (ash) are separated from the gaseous products by cyclone technology. Part of the residual solids are mixed with fresh petroleum coke powder, and circulated back to the gasifier, and the remaining residual solids are discharged from t...

Embodiment 2

[0043] The carbonaceous material used in this example is lignite, and its main properties are listed in Table 1. Mix iron oxide and potassium sulfate with deionized water at a mass ratio of 1:1 to form a slurry as a gasification catalyst. Mix lignite with iron oxide + potassium sulfate slurry at a mass ratio of 95:5, stir evenly, dehydrate and dry at 300°C for 30 minutes, then pulverize and grind to obtain a particle size range of 10-200 mesh (0.075-2.00mm). The above-mentioned solid particles are divided into two streams according to a certain ratio, and the mixed gas composed of oxygen + water vapor containing different oxygen content is sent into the gasifier through the feed port located on the side wall and bottom of the fluidized bed gasifier. Inside, the gasification reaction takes place. At the top of the gasifier, the reaction residual solids and gaseous products are separated by cyclone technology. Part of the residual solids are mixed with the pulverized and groun...

Embodiment 3

[0045] The carbonaceous material used in this embodiment is a heavy oil cracking spent agent, the heavy oil cracking spent agent with a particle size range of 80-325 mesh (0.047-0.18mm) and a carbon mass fraction of 2.85% is divided into The two streams are sent into the gasifier together with the mixed gas composed of oxygen + water vapor containing different oxygen content through the feed port located on the side wall and bottom of the fluidized bed gasifier, and the gasification reaction occurs. At the top of the gasifier, the reaction residual solids and gaseous products are separated by cyclone technology. A part of the residual solid is mixed with the initial spent agent, and is circulated back to the gasifier, and the remaining residual solid is discharged from the system after exchanging heat with the gasifying agent. The main operating conditions and distribution of gasification products are listed in Table 2. As shown in Table 2, the integral fraction of synthesis g...

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Abstract

The invention relates to a preparation method of a synthesis gas by gasifying carbonaceous materials. The preparation method comprises the following steps: mixing the carbonaceous materials with an optional gasification catalyst, drying and dewatering, and pulverizing to obtain carbonaceous particles; separately introducing the carbonaceous particles and gasification agents with different oxygen contents to different parts of a gasifier in a segmented manner, and carrying out reaction in the gasifier to generate a gas product containing the synthesis gas and ash; and mixing all or part of the ash with the carbonaceous particles and returning to the gasifier, and discharging the remaining part out of the system. The preparation method provided by the invention has high adaptability to raw materials and is adaptable to any carbonaceous materials with carbon contents of 1-100wt%, can optimally control the combustion and gasification of the carbonaceous materials and the secondary reaction of the products, and couple fast combustion reaction with slow gasification reaction to realize the autothermal equilibrium of the system and obtain high-yield synthesis gas.

Description

technical field [0001] The invention relates to a synthesis gas or hydrogen production process through the gasification of carbonaceous materials, more specifically, a process of utilizing carbonaceous materials to partially oxidize and gasify them to convert them into gas products of carbon monoxide and hydrogen. Background technique [0002] With the violent fluctuation of energy supply and demand around the world, coupled with the increasing awareness of environmental protection, clean, efficient and flexible new energy processing technology is increasingly favored, such as heavy oil hydrogenation technology is constantly being valued. However, the high hydrogen consumption of heavy oil hydrogenation has always been one of the problems that plague the large-scale operation of the hydrogenation process. At present, technologies such as methane steam cracking hydrogen production, heavy oil hydrogen production, and electrolytic water hydrogen production have the disadvantage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/54C10J3/46
CPCY02P20/52
Inventor 门秀杰张书红王子军李延军吴治国汪燮卿
Owner CHINA PETROLEUM & CHEM CORP
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