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A method for producing synthetic oil using coal and refinery dry gas as raw materials

A technology for refinery dry gas and synthetic oil, which is applied in chemical instruments and methods, gasification process, petroleum industry, etc., can solve the problem of producing synthetic oil without the joint supply of methane dry reforming and Fischer-Tropsch synthesis, affecting the industrialization of F-T synthesis process process, low utilization of carbon atoms, etc., to achieve the effect of promoting industrialization, reducing emissions, and reducing energy consumption

Active Publication Date: 2020-03-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technical process of synthetic oil production in this process is shown in figure 1 , the main problems are: 1. high energy consumption and low utilization rate of carbon atoms; 2. carbon dioxide emissions are 5 to 6 times that of traditional petroleum routes; growth according to exponentially decreasing molar distribution), and is subject to the large amount of methane and carbon dioxide generated by the strong exothermic reaction, the overall energy efficiency of the process is low, which seriously affects the industrialization process of the F-T synthesis process
[0004] At present, there is no invention related to the joint production of synthetic oil by methane dry reforming and Fischer-Tropsch synthesis

Method used

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  • A method for producing synthetic oil using coal and refinery dry gas as raw materials
  • A method for producing synthetic oil using coal and refinery dry gas as raw materials
  • A method for producing synthetic oil using coal and refinery dry gas as raw materials

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0051] In the above-mentioned supported catalyst, the carrier is γ-alumina containing a modifier, and compared with γ-alumina not containing a modifier, the CO of the γ-alumina containing a modifier is 2 -TPD desorption temperature is higher than that of γ-alumina without modifier 2 - TPD desorption temperature. Therefore, in the present invention, the performance of γ-alumina before and after modification can be expressed as CO 2 - Characterization of TPD, CO 2 -TPD means γ-alumina to CO 2 The desorption temperature is high, and the high temperature indicates that the basicity of γ-alumina is strong, which is beneficial to the desorption of diesel components and heterogeneous diesel. in CO 2 - In the TPD spectrum, the position of the peak temperature and the size of the peak area indicate the basicity of γ-alumina, and the CO 2 The high desorption peak temperature and large peak area indicate that γ-alumina has a strong basicity, which is beneficial to the desorption of ...

Embodiment 1

[0103] This example is used to illustrate the method provided by the present invention.

[0104] (1) System construction

[0105] Connect the coal water slurry preparation unit I, coal gasification unit II, water gas shift unit III, synthesis gas purification unit IV, Fischer-Tropsch synthesis unit V and synthetic oil separation unit VI in sequence, and export the carbon dioxide from the Fischer-Tropsch synthesis unit V through the pipeline The carbon dioxide outlet of the synthesis gas purification unit IV is connected with the carbon dioxide inlet of the methane dry reforming unit VII, and the methane outlet of the refinery dry gas separation unit VIII and the methane outlet of the Fischer-Tropsch synthesis unit V are connected with the methane of the methane dry reforming unit VII. The inlet is connected, and the synthesis gas outlet of the methane dry reforming unit VII is connected with the synthesis gas inlet of the Fischer-Tropsch synthesis unit V through a delivery pip...

Embodiment 2

[0117] This example is used to illustrate the method provided by the present invention.

[0118] (1) System construction

[0119] The system was constructed in the same manner as in Example 1.

[0120] (2) Preparation of Fischer-Tropsch synthesis catalyst

[0121] a. Preparation of carrier

[0122] Weigh 14.2g of zirconium nitrate pentahydrate and dissolve it in 120g of deionized water to make a modified zirconium solution, add 100.0g of 40-60 mesh γ-Al to the modified zirconium solution 2 o 3 In the carrier, stir evenly for 5 minutes, let it stand for 2 hours, put it in an oven, dry it at 200 ° C for 3 hours, and roast it at 800 ° C for 1 hour to prepare a modified compound with a Zr content of 3% by weight in terms of metal elements and based on the weight of the modified carrier. Sex carrier Z2, its CO 2 The desorption peak temperature and peak area are shown in Table 1.

[0123] b. Preparation of catalyst

[0124] Dissolve 17.3 g of ferric ammonium citrate in 12.6 m...

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Abstract

The invention relates to a method for preparing synthesis oil from coal and dry gas in a refinery plant as raw materials. The method includes the following steps: 1) preparing water-coal-slurry from powdered coal and water; 2) allowing the water-coal-slurry and oxygen to be subjected to a high-temperature gasification reaction to prepare crude coal gasification synthesis gas; 3) purifying the crude coal gasification synthesis gas to obtain purified synthesis gas and carbon dioxide; 4) allowing the purified synthesis gas to be subjected to a Fischer-Tropsch synthesis reaction under the synthesis oil production main condition, and separating the obtained mixture to obtain synthesis-oil-containing material flow and carbon dioxide and methane; 5), separating the dry gas in the refinery plant to separate methane therein out; 6) carbon dioxide obtained in step 3) and / or step 4) and methane obtained in step 5) or methane obtained in step 4) and step 5) are subjected to a methane dry-reforming reaction. The method for preparing synthesis oil from the coal and the dry gas in the refinery plant as the raw materials can reduce greenhouse gas emission and remarkably improve resource and energy utilization rates of the whole process.

Description

technical field [0001] The invention relates to a method for preparing synthetic oil by using coal and refinery dry gas as raw materials. Background technique [0002] my country's energy resources are rich in coal, rich in natural gas, and short of oil resources. The indirect conversion of coal-based or natural gas into clean and efficient liquid fuels through Fischer-Tropsch (F-T) synthesis is an important aspect of rational use of resources, which can alleviate the contradiction between my country's oil supply and demand main technical approach. Coal-to-syngas direct-to-clean oil process first converts coal or natural gas into syngas (CO and H 2 ), and then directly make liquid fuel through F-T synthesis. The most important advantage of synthetic oil produced by F-T synthesis is that it does not contain non-ideal components such as sulfur, nitrogen and aromatics, and is a clean fuel that fully meets the strict requirements of modern engines and increasingly stringent env...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/46C10G2/00C01B3/36
CPCC01B3/36C10G2/50C10J3/46C10J2300/0959C10J2300/1659C10J2300/1662Y02P30/00
Inventor 晋超吴玉夏国富张荣俊孙霞侯朝鹏李明丰杨清河
Owner CHINA PETROLEUM & CHEM CORP