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A kind of equipment and method for co-producing olefins and aromatics by using synthesis gas hydrogenation

A technology for synthesis gas and olefins, applied in chemical instruments and methods, preparation of liquid hydrocarbon mixtures, hydrocarbons, etc., can solve the problems of matching the best operating conditions, restricting the application of synthesis gas or carbon dioxide into aromatic hydrocarbons, etc. The effect of increasing the added value of products, easy switching of regeneration treatment, and high comprehensive utilization efficiency

Active Publication Date: 2020-11-06
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the optimum operating conditions for the Fischer-Tropsch and aromatization reactions are often not well matched
These problems will likely limit the application of syngas or carbon dioxide into aromatics; therefore, it is necessary to develop a comprehensive reaction process that not only obtains valuable olefins and aromatics products at the same time, but also can comprehensively improve CO or CO 2 Utilization efficiency, improve the economy of the whole process

Method used

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  • A kind of equipment and method for co-producing olefins and aromatics by using synthesis gas hydrogenation
  • A kind of equipment and method for co-producing olefins and aromatics by using synthesis gas hydrogenation
  • A kind of equipment and method for co-producing olefins and aromatics by using synthesis gas hydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 1 Shown is a production device of the present invention that utilizes syngas hydrogenation to co-produce olefins and aromatics, including a primary reactor 1, a secondary reactor 2, a tertiary reactor 3, a water-oil-gas three-phase separator 4, a A separation system 5 and a second gas-liquid separator 6, the outlet of the first-stage reactor 1 is first connected to the inlet of the water-oil-gas three-phase separator 4 after heat exchange with the feed gas pipeline, and the water-oil-gas three-phase The gas phase outlet of the separator 4 is connected to the inlet of the first separation system 5, the water phase outlet of the water-oil-gas three-phase separator 4 is connected to the waste water system, and the oil-phase outlet of the water-oil-gas three-phase separator 4 is connected to the first After the branch of the olefin product outlet of the separation system 5 is merged, it is connected to the secondary reactor 2 through a pipeline, and the pipel...

Embodiment 2

[0040] (1) the feed gas H 2 / CO=1:1 (the feed gas contains 3vol% N 2 As an internal standard), GHSV=5000h -1 , after preheating, the Fischer-Tropsch synthesis reaction is carried out through the first-stage reactor. The first-stage reactor is a fixed-bed reactor, filled with 2 Fully reduced 17Co5.1Mn / SiO 2 Catalyst (that is to say that the content of Co in the catalyst is 17wt%, the content of Mn is 5.1wt%, and the carrier is SiO 2 , the same below), the operating conditions are: the inlet temperature is 200°C, the temperature in the reactor is 230°C, and the pressure is 1.0MPa;

[0041] (2) After the outlet gas of the primary reactor is cooled, it enters the water-oil-gas three-phase separator for three-phase separation; the separation temperature of the water-oil-gas three-phase separator is 0°C, and the gas phase material obtained by the three-phase separation enters the first separation system, The water phase is discharged into the waste water system, and the liquid d...

Embodiment 3

[0046] The reaction temperature in the first-stage reactor is 250°C, and the rest of the operating conditions are the same as those in Example 2. After passing through the first-stage reactor and the second-stage reactor, the average CO conversion rate and product distribution within 50-100 hours The results are shown in Table 1.

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Abstract

The invention discloses a device and method for hydrogenating co-production of olefin and arene by means of syngas, and belongs to the technical field of syngas conversion. The device is composed of areactor with the Fischer-Tropsch reaction performance, a water-oil-gas three-phase separator and a reactor which is loaded with a zeolite molecular sieve and has an aromatization function in series.The operating conditions of the Fischer-Tropsch reactor are that the reaction temperature is 200-400 DEG C, the reaction pressure is 0.1-5 MPa, the reaction gas space velocity is 800-20,000 h<-1>; theoperating conditions of the aromatization reactor are that that reaction temperature is 280-600 DEG C, the reaction pressure is 0.1-5 MPa, and the reaction gas space velocity is 800-20,000 h<-1>. Accordingly, extremely low CO2 generation and low-carbon alkane selectivity can be achieved, the phenomenon that high value-added olefin is subjected to hydrogenation to generate low value-added alkane is avoided, and low carbon olefin and arene products are obtained while high selectivity is achieved; in liquid phase products, the arene content can reach 95% or above, and BTX can reach 80% or above.

Description

technical field [0001] The invention belongs to the technical field of synthesis gas conversion, and in particular relates to a device and method for hydrogenation and co-production of olefins and aromatics using synthesis gas. Background technique [0002] Low-carbon olefins (including ethylene, propylene, and butene) and aromatics (including benzene, toluene, and xylene, etc.) are important chemical basic raw materials, which are currently mainly derived from petroleum-based production processes, such as petroleum-based production processes. Naphtha steam cracking and catalytic reforming or cracking to produce gasoline or diesel. With the reduction of crude oil resources and the growing environmental concerns, the method of obtaining olefins and aromatics from petroleum routes has become unsustainable and environmentally challenging. Therefore, more and more attention has been paid to the non-petroleum route to produce olefins and aromatics. Based on my country's energy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/00B01J8/02B01J8/22B01J8/24C10G2/00C07C1/04C07C11/02C07C15/02C07C9/02
CPCB01J8/00B01J8/02B01J8/22B01J8/24C07C1/041C10G2/332C10G2/334C10G2/34C07C11/02C07C15/02C07C9/02
Inventor 刘小浩胥月兵姜枫刘冰
Owner JIANGNAN UNIV