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Method for synthesizing liquid hydrocarbons

A technology for liquid hydrocarbons and synthesis gas, which is used in the preparation of liquid hydrocarbon mixtures and the petroleum industry, etc., can solve the problems that parallel reactors cannot control the reaction depth in stages and the total pressure drop of series reactors, etc., and achieves a small pressure drop. , high activity and selectivity, avoiding the effect of large total pressure drop

Active Publication Date: 2015-03-18
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a new method for synthesizing liquid hydrocarbons, which not only solves the problem of high total pressure drop in series reactors, but also solves the problem that parallel reactors cannot control the reaction depth in sections

Method used

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  • Method for synthesizing liquid hydrocarbons

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Embodiment 1

[0024] The preparation process of the Fischer-Tropsch synthesis catalyst used in the examples is as follows: take alumina powder, add distilled water dropwise to incipient wetness, record the volume of consumed water, then calculate according to the Co content (oxide) 27% by weight, prepare the Cobalt nitrate impregnation solution. Then impregnate alumina with this solution to incipient wetness, let it stand for 8 hours, then dry it at 120°C for 4 hours, and bake it in a muffle furnace at 450°C for 4 hours to prepare the catalyst. The particle size range of the catalyst is 1.5-2.5mm. This embodiment adopts the technological process shown in the accompanying drawing. The catalyst volume ratio of the first stage reactor to the second stage reactor catalyst volume is 1:1. The fresh feed gas was reacted under the process conditions listed in Table 1.

[0025] Table 1 process conditions

[0026] Process conditions

[0027] By adopting the method provided by the invent...

Embodiment 2

[0029]The preparation process of the Fischer-Tropsch synthesis catalyst used in the examples is as follows: take alumina powder, add distilled water dropwise to incipient wetness, record the volume of consumed water, then calculate according to Co content (oxide) 32% by weight, prepare Cobalt nitrate impregnation solution. Then impregnate alumina with this solution to incipient wetness, let it stand for 8 hours, then dry it at 120°C for 4 hours, and bake it in a muffle furnace at 450°C for 4 hours to prepare the catalyst. The particle size range of the catalyst is 1.5-2.5 mm. This embodiment adopts the technological process shown in the accompanying drawing. The catalyst volume ratio of the first stage reactor to the second stage reactor catalyst volume is 1:1.2. The fresh feed gas was reacted under the process conditions listed in Table 2.

[0030] Table 2 process conditions

[0031] Process conditions

[0032] By adopting the method provided by the invention, t...

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Abstract

The invention relates to a method for synthesizing liquid hydrocarbons. A raw material synthetic gas and a circulation gas are mixed and enter a primary reactor to be subjected to Fischer-Tropsch synthesis reaction; the reaction effluent of the primary reactor and a reaction effluent of a secondary reactor are mixed and enter a subsequent separation system; and most of separated gas-phase material is circulated to inlets of the primary reactor and secondary reactor via a circulation compressor. The technique adopted by the invention has the advantage of capability of sectionally controlling the reaction depth in the series-type two-stage reactor, and also has the advantage of only needing one separation system in the parallel reactor. The invention has the characteristics of high activity and selectivity of Fischer-Tropsch synthesis, small pressure drop of the reactor, large control space for reaction, and simple technological equipment.

Description

technical field [0001] The invention relates to a fixed-bed Fischer-Tropsch synthesis method. Background technique [0002] Clean fuels and other high value-added chemicals can be produced on a large scale through the Fischer-Tropsch synthesis reaction, and the raw material synthesis gas (CO and H 2 ) has a wide range of sources and can be obtained from coal, natural gas, and biomass through gasification. Therefore, this technical path has attracted great attention from the world's energy and chemical industries. Many international energy companies have developed synthetic oil processes with Fischer-Tropsch synthesis as the core. The Fischer-Tropsch synthesis technology of the tubular fixed-bed reactor is adopted, which has the characteristics of simple engineering technology, and the fixed-bed reactor can reduce the influence of poisons on the overall catalyst. Separation of product and catalyst. However, the fixed bed reactor also has some limitations, such as the remova...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G2/00
Inventor 徐润胡志海吴昊聂红李猛
Owner CHINA PETROLEUM & CHEM CORP
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