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Water vapor thermal plasma cracking treatment method of asphaltenes

A technology of thermal plasma and cracking treatment, which is used in hydrocarbon cracking to produce hydrocarbons, carbon preparation/purification, and organic chemistry.

Active Publication Date: 2020-08-07
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, asphaltenes are complex mixtures of polycyclic aromatic hydrocarbons, which are often considered as "unconvertible" raw materials, and conventional chemical conversion methods are difficult to achieve efficient conversion of asphaltenes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Asphaltene raw material is in the form of high temperature liquid phase, through CH 4 The atomized transport enters the thermal plasma reactor. The thermal plasma torch uses water vapor as the working gas, the input power is 2MW, the water vapor flow rate used by the thermal plasma torch is 150kg / h, the average temperature of the plasma exceeds 3500K, and the temperature in the central area is 5000-6000K. The feed rate of the asphaltene raw material is 600kg / h, and the CH 4 Gas volume is 12kg / h. The pyrolysis product temperature is 1500~2000K, and the pyrolysis product enters the rapid separation device (the gas-solid separation device disclosed in the patent CN1267564 in the prior art), the gas residence time is 80ms, and the solid phase residence time is 75% of the separation efficiency. The output is 220kg / h. The gas separated at the gas outlet, that is, the gas-phase intermediate product, enters the quenching device, is rapidly cooled with circulating water, and ...

Embodiment 2

[0031] The asphaltene raw material is transported into the thermal plasma reactor through Ar atomization in the form of high-temperature liquid phase. The thermal plasma torch uses water vapor as the working gas, the input power is 2.5MW, the water vapor flow rate used by the thermal plasma torch is 200kg / h, the average temperature of the plasma exceeds 3500K, and the temperature in the central area is 5000-6000K. The feed rate of the asphaltene raw material is 600kg / h, and the delivery rate of Ar gas is 15kg / h. Carbon dioxide is fed into the reactor to adjust the ratio of carbon monoxide and hydrogen in the product synthesis gas, and the flow rate of the added carbon dioxide is 100kg / h. The pyrolysis product temperature is 1500~2000K, and the pyrolysis product enters the rapid separation device (the gas-solid separation device disclosed in the patent CN1267564 in the prior art), the gas residence time is 80ms, and the solid phase residence time is 75% of the separation effici...

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Abstract

The invention discloses a water vapor hot plasma pyrolysis treatment process for asphaltene, and belongs to the field of petrochemical engineering. The water vapor hot plasma pyrolysis treatment process includes S1, atomizing a raw material, namely the asphaltene, by the aid of delivered gas; S2, mixing the atomized asphaltene and water vapor hot plasma jet with each other to obtain mixtures and carrying out reaction on the mixtures to obtain a gas-phase product and a solid-phase product; S3, separating the gas-phase product from the solid-phase product, collecting the solid-phase product to obtain solid-phase carbon materials, and quenching the gas-phase product to obtain pyrolysis gas with synthesis gas (carbon monoxide and hydrogen) and acetylene. The water vapor hot plasma pyrolysis treatment process has the advantages that the water vapor hot plasma pyrolysis treatment process is applicable to treating the asphaltene, accordingly, the asphaltene, namely the raw material, can be efficiently utilized, and high-additional-value products such as solid carbon materials and the synthesis gas can be produced.

Description

technical field [0001] The invention relates to a water vapor thermal plasma cracking treatment process of asphaltene, which belongs to the field of petrochemical industry. Background technique [0002] With the consumption of light petrochemical resources, global petrochemical resources are becoming increasingly heavy, and there is an urgent need for efficient conversion technologies for heavy petrochemical resources. Solvent deasphalting technology is an effective means of lightening heavy oil: by separating impurities such as asphaltenes and heavy metals in heavy oil raw materials, deasphalted oil (DAO) can be obtained, which is a light raw material that can be further used for processing Subsequent processes such as hydrogen treatment. This process also produces a large amount of deoiled asphalt (DOA), which is often directly used as cheap fuel or as a building material. The research group proposes to use chemical conversion methods to convert asphaltene, which is diff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C4/04C07C11/24C01B32/05C10B53/00
CPCC07C4/04C10B53/00C07C11/24
Inventor 胡长禄程易程炎张艳梅李天阳刘银东
Owner PETROCHINA CO LTD