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Synthetic gas conversion coupling catalyst and use thereof

A synthesis gas conversion and catalyst technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc.

Pending Publication Date: 2021-04-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a coupling catalyst containing metal oxide and sheet ZSM-5 molecular sieve by regulating the morphology of molecular sieves and optimizing the distribution of synthesis gas conversion reaction products, which are not involved in the prior art. High catalytic activity and aromatics selectivity, C 6 -C 8 Aromatics are highly selective and C 9+ Advantages such as low selectivity of aromatics

Method used

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  • Synthetic gas conversion coupling catalyst and use thereof
  • Synthetic gas conversion coupling catalyst and use thereof
  • Synthetic gas conversion coupling catalyst and use thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Preparation of Cr by precipitation method 2 o 3 , the H-ZSM-5 molecular sieve with Si / Al ratio of 50 was synthesized by hydrothermal method. The XRD spectrum pattern of gained H-ZSM-5 is as figure 1 As shown, the characteristic peaks of the MFI structure can be seen in the spectrogram, and it can be observed that the intensity ratio of the diffraction peaks of the (101) crystal plane (2θ=7.972°) and the (200) crystal plane (2θ=8.818°) is lower than that of the H - ZSM-5 molecular sieve. The SEM photograph of gained H-ZSM-5 is as figure 2 As shown, it can be observed that the molecular sieve has a sheet-like morphology, and the dimensions of the a, b, and b axes are 600 nm, 100 nm, and 1500 nm, respectively. Cr 2 o 3 Mechanically mix with H-ZSM-5 at a mass ratio of 1:2, crush to 20-40 mesh after tableting, weigh 1.5g and fill in the reactor. At a reaction temperature of 395°C and a pressure of 4.0MPa, the feed gas H 2 / CO ratio 1.0, airspeed 2000h -1 Catalyst e...

Embodiment 2

[0047] MnO was prepared by precipitation method, and H-ZSM-5 molecular sieves with Si / Al ratio of 50 and a, b and b axis sizes of 600nm, 100nm and 1500nm were synthesized by hydrothermal method. MnO and H-ZSM-5 were mechanically mixed at a mass ratio of 1:2, crushed to 20-40 mesh after tableting, and 1.5 g was weighed and loaded into the reactor. At a reaction temperature of 395°C and a pressure of 4.0MPa, the feed gas H 2 / CO ratio 1.0, airspeed 2000h -1 Catalyst evaluation was carried out under the conditions. Before the reaction, the catalyst was heated with H at 395°C 2 Pretreatment 2h. CO conversion, aromatics selectivity, C 6 -C 8 The results of aromatics selectivity are shown in Table 1.

Embodiment 3

[0049] MnO was prepared by high-temperature sintering method, and H-ZSM-5 molecular sieves with Si / Al ratio of 30 and a, b, and b axis sizes of 1600nm, 500nm, and 5000nm were synthesized by hydrothermal method. MnO and H-ZSM-5 were mechanically mixed at a mass ratio of 1:2, crushed to 20-40 mesh after tableting, and 1.5 g was weighed and loaded into the reactor. At a reaction temperature of 395°C and a pressure of 4.0MPa, the feed gas H 2 / CO ratio 1.0, airspeed 2000h -1 Catalyst evaluation was carried out under the conditions. Before the reaction, the catalyst was heated with H at 395°C 2 Pretreatment 2h. CO conversion, aromatics selectivity, C 6 -C 8 The results of aromatics selectivity are shown in Table 1.

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Abstract

The invention relates to a synthetic gas conversion coupling catalyst and use thereof, in particular to a process for producing aromatic hydrocarbon and / or light hydrocarbon through synthesis gas conversion and a used catalyst. The catalyst system has the catalytic activity in synthesis gas conversion, aromatic hydrocarbon and / or light hydrocarbon synthesis. Specifically, the synthesis gas conversion activity is provided by a metal oxide, and the aromatic hydrocarbon and / or light hydrocarbon synthesis activity is provided by a flaky ZSM-5 molecular sieve. The flaky ZSM-5 molecular sieve is a hexagonal prism sheet, the size ratio of a c axis to a b axis of the flaky ZSM-5 molecular sieve is (2:1)-(50:1), and the size ratio of an a axis to the b axis of the flaky ZSM-5 molecular sieve is (3:1)-(20:1). Under the action of the coupling catalyst, the synthesis gas can be efficiently converted to generate aromatic hydrocarbon and / or light hydrocarbon, and particularly, a C6-C8 aromatic hydrocarbon product can be generated with high selectivity. The invention provides a new route for preparing aromatic hydrocarbon and / or light hydrocarbon by directly converting synthesis gas through a one-step method.

Description

technical field [0001] The present invention relates to a catalyst for producing aromatics and / or light hydrocarbons by converting synthesis gas and its application, in particular to a catalyst system coupled with oxides and sheet-shaped ZSM-5 molecular sieves, and a process for producing aromatics and / or light hydrocarbons by converting synthesis gas . Background technique [0002] Syngas is one of the main intermediates for the conversion and utilization of resources such as coal and shale gas. The routes for preparing hydrocarbons from synthesis gas mainly include two types, which are based on Fischer-Tropsch synthesis route and synthesis alcohol route respectively. The product distribution of Fischer-Tropsch synthesis is wide and limited by the Anderson-Schulz-Flory distribution, and the selectivity of aromatic products is low; the indirect synthesis route based on the methanol platform can learn from existing mature processes, but its production route is long, and in a...

Claims

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Application Information

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IPC IPC(8): B01J29/48C10G2/00
CPCB01J29/48C10G2/334B01J2229/186
Inventor 刘畅刘苏周海波苏俊杰焦文千张琳王仰东
Owner CHINA PETROLEUM & CHEM CORP
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