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Method for regenerating fixed bed FischerTropsch synthesis catalyst

A Fischer-Tropsch synthesis and catalyst technology, applied in the direction of catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc. agent interaction and other issues to achieve the effect of prolonging life

Active Publication Date: 2013-09-25
RES INST OF PETROLEUM PROCESSING SINOPEC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This type of catalyst regeneration method is effective for catalyst deactivation due to various reasons, but it will destroy the catalyst structure, affect the interaction between the active metal and the support and the active metal and the promoter, and the operation is complicated, and the catalyst regeneration needs to be carried out in other in special equipment

Method used

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Embodiment

[0032] In this embodiment, a tubular fixed-bed reactor is used, and cobalt loaded with metal oxide is used as a Fischer-Tropsch synthesis catalyst, and the content of cobalt is 20% by weight. The Fischer-Tropsch synthesis reaction conditions are: reaction pressure 3.0MPa, catalyst bed average temperature 210°C, H 2 The molar ratio of feed to CO is 2, and the hourly space velocity of syngas is 750h -1 , The ratio of recycle gas to fresh feed gas (cycle ratio) is 4.

[0033] The catalyst was regenerated after running for 4000h. First, keep the average temperature of the catalyst bed at 220°C, cut in high-purity nitrogen and cut out the synthesis gas, and keep the gas hourly space velocity at 750h -1 , the cycle ratio is kept at 4. Replacement until the liquid level of the separator has no obvious change, and the volume fraction of total hydrocarbons in the purge gas is less than 0.1%, stop the cycle compressor, reduce the reactor pressure to 0.5MPa at a rate of 0.5MPa per hou...

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Abstract

The invention relates to a method for regenerating a fixed bed FischerTropsch synthesis catalyst. The method provided by the invention comprises the following steps: firstly, carrying out blowing processing on a catalyst to be regenerated in inert atmosphere; after processing, washing the catalyst for multiple times by adopting light fraction in synthetic oil; after washing, enabling the catalystwithout oil to be in contact with gas containing oxygen and controlling the degree of oxidation by controlling the temperature and the oxygen content; and after oxidizing, completing the regeneratingcourse of the catalyst through hydrogen reduction. The method provided by the invention can eliminate catalyst deactivation caused by carbon deposition, metal phase change and partial poison pollution, thereby achieving the purpose of prolonging the service life of the FischerTropsch synthesis catalyst.

Description

technical field [0001] The invention relates to a catalyst regeneration method, in particular to a regeneration method of a fixed-bed Fischer-Tropsch synthesis cobalt-based catalyst. Background technique [0002] With the development of the world economy, the demand for refined oil has increased rapidly, while the reserves and production of oil resources have gradually decreased and become inferior. The contradiction between demand and reserves has become increasingly prominent. At the same time, the requirements of international and domestic environmental protection regulations have become increasingly Therefore, obtaining high-quality liquid fuel products through new methods is a major problem facing China and the world. Clean fuels (especially high-quality diesel) and other high value-added chemicals can be produced on a large scale through Fischer-Tropsch (F-T) synthesis. The raw material synthesis gas (CO and H 2 ) has a wide range of sources and can be obtained from ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J38/14B01J23/75
Inventor 徐润胡志海吴昊李猛李大东聂红夏国富
Owner RES INST OF PETROLEUM PROCESSING SINOPEC
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