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

An autothermal conversion and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. , unstable catalyst structure and other problems, to achieve the effect of improving anti-coking ability, good high temperature sintering performance, and improving activity

Inactive Publication Date: 2010-10-06
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

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Experimental program
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Effect test

Embodiment 1

[0049] This embodiment adopts the following method to prepare CaO-Al 2 O 3 Complex oxide carrier 1:

[0050] Weigh Al(OH) 3 191.2g, CaO21.3g, mechanically ball-milled to a particle size greater than 200 mesh, added 6.4g of graphite and mixed, then pressed into shape (Ф19×19×9mm, Raschig ring), dried and calcined at 1250°C for 4hrs , that is, to obtain CaO-Al 2 O 3 Composite oxide support 1.

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

Embodiment 2

[0053] This embodiment adopts the following method to prepare CaO-Al 2 O 3 Complex oxide carrier 2:

[0054] Weigh Al(OH) 3 197.5g, CaO14.9g, mechanically ball-milled to a particle size greater than 200 mesh, mixed with 6.4g of graphite and then pressed into shape (Ф19×19×9mm, Raschig ring), dried and calcined at 1250°C for 4hrs , that is, to obtain 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] This embodiment adopts the following method to prepare CaO-Al 2 O 3 Complex oxide carrier 3:

[0058] Weigh Al(OH) 3 191.2g, CaO21.3g, mechanically ball-milled to a particle size greater than 200 mesh, added 6.4g of graphite and mixed and then pressed into shape (Ф19×19×9mm, Raschig ring), dried and calcined at 1330℃ for 4hrs , that is, to obtain 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 physicochemical properties of the composite oxide carrier (also known as the Ca-Al type composite oxide carrier) are shown in Table 1 below:

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

[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 reforming catalysts, and particularly relates to a catalyst for autothermal transformation of methane-enriched gas to syngas or hydrogen production and similar processes and a preparation method thereof. Background technique [0002] In today's increasingly tense oil resources, in order to open up new energy and environmental protection requirements, some CH 4 The effective utilization of gases such as coalbed methane and coke oven gas has received increasing attention. In order to adapt to the inevitable trend of future energy and chemical raw material route transfer, research and development of CH-rich 4 New pathways for gases have become a hot topic today. [0003] The autothermal reforming process of rich methane gas is a new process combining catalytic partial oxidation and adiabatic steam reforming. This process couples the combustion reaction of methane and the strongly endot...

Claims

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Application Information

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