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Self-heating conversion catalyst rich in methane gas and method of producing the same

A self-thermal conversion and catalyst technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of unstable catalyst structure, easy dehydration and phase change , Catalysts are prone to sticking and other problems, to achieve the effect of improving anti-coking ability, good high temperature resistance to sintering performance, and improving activity

Active Publication Date: 2009-04-08
HAO HUA CHENGDU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] At present, the autothermal conversion process of rich methane gas has not been truly industrialized at home and abroad. The reason is largely because there is no matching industrial catalyst. Some small methanol plants in China are currently using the partial oxidation process of methane and oxygen. The catalyst used is the Z204 two-stage steam reforming catalyst developed in the 1970s. This catalyst is a precipitated catalyst. The added binder cement is prone to dehydration and phase change during operation, making the catalyst structure unstable. Catalyst is prone to sticking at high temperature

Method used

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  • Self-heating conversion catalyst rich in methane gas and method of producing the same
  • Self-heating conversion catalyst rich in methane gas and method of producing the same
  • Self-heating conversion catalyst rich in methane gas and method of producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] In this example, CaO-Al is prepared by the following method 2 o 3 Composite oxide carrier 1:

[0050] Weigh Al(OH) 3 191.2g, CaO 21.3g, through mechanical ball milling until the particle fineness is greater than 200 mesh, add 6.4g of graphite and mix, then press to form (Φ19×19×9mm, Raschig ring), after drying, calcining at 1250°C for 4hr , that is, the prepared CaO-Al 2 o 3 Composite oxide support 1.

[0051] Al in support 1 after calcination 2 o 3 The mass ratio to CaO is 1:0.17.

Embodiment 2

[0053] In this example, CaO-Al is prepared by the following method 2 o 3 Composite oxide carrier 2:

[0054] Weigh Al(OH) 3 197.5g, CaO 14.9g, through mechanical ball milling until the particle fineness is greater than 200 mesh, add 6.4g of graphite and mix, then press into shape (Φ19×19×9mm, Raschig ring), after drying, calcining at 1250℃ for 4hr , that is, the prepared CaO-Al 2 o 3 Composite oxide support 2.

[0055] Al in carrier 2 after calcination 2 o 3 The mass ratio to CaO is 1:0.115.

Embodiment 3

[0057] In this example, CaO-Al is prepared by the following method 2 o 3 Composite oxide carrier 3:

[0058] Weigh Al(OH) 3 191.2g, CaO 21.3g, through mechanical ball milling until the particle fineness is greater than 200 mesh, add 6.4g of graphite and mix, then press into shape (Φ19×19×9mm, Raschig ring), after drying, calcining at 1330°C for 4hr , that is, the prepared CaO-Al 2 o 3 Composite oxide support 3.

[0059] Al in carrier 3 after calcination 2 o 3 The mass ratio to CaO is 1:0.17.

[0060] The CaO-Al prepared by above-mentioned embodiment 1~3 2 o 3 The physical and chemical properties of the composite oxide carrier (also known as the Ca-Al type composite oxide carrier) are shown in the following table 1:

[0061] Table 1 Physicochemical properties of Ca-Al type composite oxide support

[0062]

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Abstract

The invention discloses a catalyst for self-heating transformation of methane-rich gas, which mainly consists of a carrier, an active component and auxiliary agent components, wherein the carrier is a CaO-Al2O3 composite oxide carrier, and the mass ratio of Al2O3 to CaO in the carrier is between 1 to 0.05 and 1 to 0.50; the active component is NiO; the auxiliary agent components are selected from one or more of Al2O3, MgO and rare earth oxides; and the mass percentage of various components is as follows: 5 to 15 percent of the active component, 0.1 to 10 percent of the auxiliary agent components, and the balance being the CaO-Al2O3 composite oxide carrier, and the total mass is 100 percent. The catalyst has the advantages of higher reactivity, higher mechanical strength and strength stability, good high temperature sintering resisting performance and coking resistance, stable carrier phase before and after operation, and stable active metal crystal grain without sintering. The invention also discloses a method for preparing the catalyst.

Description

technical field [0001] The invention belongs to the technical field of methane-enriched gas conversion catalysts, and in particular relates to a catalyst used for autothermal conversion of methane-enriched gas to produce synthesis gas or hydrogen production and a similar process and a preparation method thereof. Background technique [0002] In today's increasingly tense oil resources, in order to develop new energy and environmental protection requirements, some rich in CH 4 The effective utilization of gases such as coalbed methane and coke oven gas has been paid more and more attention. In order to adapt to the inevitable trend of future energy and chemical raw material route transfer, the research and development of gas rich in CH 4 New routes to gases have become a hot topic today. [0003] The autothermal reforming process of methane-rich gas is a new process combining catalytic partial oxidation and adiabatic steam reforming. This process couples the combustion reac...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J23/78B01J23/83C01B3/34
Inventor 吴且毅何洋颜智张新波
Owner HAO HUA CHENGDU TECH