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Catalyst for producing synthesis gas by reforming natural gas and carbon dioxide and preparation method thereof

A carbon dioxide and natural gas technology, applied in petrochemical, natural gas chemical, and catalyst fields, can solve the problems of catalyst bed blockage, high price, decreased activity, etc., and achieve good activity and stability, low cost, and reduced carbon generation. Effect

Inactive Publication Date: 2012-03-21
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, noble metal catalysts have the disadvantages of being expensive, easy to sinter and lose under high temperature conditions
Nickel-based catalysts are prone to activity decline and catalyst bed blockage due to high-temperature disproportionation of carbon monoxide and carbon deposition

Method used

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  • Catalyst for producing synthesis gas by reforming natural gas and carbon dioxide and preparation method thereof
  • Catalyst for producing synthesis gas by reforming natural gas and carbon dioxide and preparation method thereof
  • Catalyst for producing synthesis gas by reforming natural gas and carbon dioxide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Preparation of Catalyst A

[0022] 20g of citric acid is prepared into 450ml of aqueous solution, 980g of pseudo-boehmite and 20g of fennel powder are dry-mixed evenly, the solution is added to it, kneaded and extruded, dried at 100-110°C for 6 hours, and then calcined at 950°C After 4 hours, a bar-shaped or Raschig ring carrier was prepared. Carrier specific surface 130m 2 / g, the specific pore volume is 0.43ml / g, and the phases are α, δ, θ-Al 2 o 3 Miscible. Weigh 953g of nickel nitrate and 259g of lanthanum nitrate, dissolve them in water, and prepare 1L of nickel-lanthanum mixed solution.

[0023] Take the above-mentioned carrier and immerse it in the solution, take it out after 120 minutes, drain it, dry it, and roast it to prepare Catalyst A. Analyze its composition as:

[0024] components

Embodiment 2

[0026] Preparation of Catalyst B

[0027] 40g of citric acid is prepared into 200ml of aqueous solution, 960g of pseudoboehmite and 40g of turnip powder are dry-mixed evenly, the solution is added to it, kneaded, dried, pressed into sheet shape, Raschig ring, spherical shape, and dried at 100-110°C 6 hours, and then calcined at 1020°C for 3 hours to obtain a strip-shaped or Raschig ring carrier. Carrier specific surface 112m 2 / g, the specific pore volume is 0.35ml / g, and the phases are α, δ, θ-Al 2 o 3 Miscible.

[0028] Weigh 190g of lanthanum nitrate, dissolve it in water, and prepare 1L of lanthanum solution.

[0029] Weigh 905g nickel nitrate, dissolve it in water, and prepare 1L nickel solution.

[0030] The above-mentioned carrier is immersed in the lanthanum solution, taken out after 60 minutes, drained, dried and roasted; then immersed in the nickel solution, taken out after 120 minutes, drained, dried and roasted to obtain catalyst B.

[0031] Analyze its compo...

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PUM

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Abstract

The invention relates to a catalyst for producing synthesis gas by reforming natural gas and carbon dioxide and a preparation method thereof, belonging to the fields of petrochemical engineering, natural gas chemical engineering and catalysts. The catalyst takes aluminum oxide as a carrier, takes nickel as an active ingredient and takes a rare earth metal oxide as an assistant, wherein the content by weight of an active ingredient, namely NiO is 4.0-12.0%, and the content by weight of an assistant, namely La2O3 is 0.5-6.0%. The preparation method comprises the following steps: firstly preparing the aluminum oxide carrier, and then loading the active ingredient and the assistant on the carrier, wherein the preparation of the aluminum oxide carrier is as follows: mixing an aluminum raw material, a binding agent and a pore-forming agent, forming, drying and then performing calcination, and the active ingredient and the assistant are loaded on the carrier in an impregnation way; and further drying and calcining to prepare the catalyst. As for the catalyst, the surface of the aluminum oxide carrier is modified by the rare earth metal oxide, thereby reducing the acidity of the surface of the carrier, reducing the carbon deposition trend of methane-carbon dioxide reaction, improving the anti-carbon deposition performance, improving the dispersivity of the active ingredient, reducing the generation of carbon, improving the stability of the catalyst, prolonging the life cycle of the catalyst and realizing the low cost.

Description

technical field [0001] The invention relates to a catalyst for reforming natural gas and carbon dioxide to synthesize gas and a preparation method thereof, belonging to the fields of petrochemical, natural gas chemical and catalyst fields. Background technique [0002] Carbon dioxide is one of the main causes of the greenhouse effect and the deterioration of the global climate. According to statistics, the carbon dioxide emitted by humans into the atmosphere is increasing at a rate of 4% per year. But restricting the emission of carbon dioxide will affect the development of modern industry and world economy to a large extent. Therefore, how to effectively use carbon dioxide has aroused widespread concern from all over the world. In addition, due to rising oil prices and increasing energy demand, how to utilize natural gas has become a hot topic. Natural gas is an ideal substitute for oil and is plentiful. [0003] Comprehensive utilization of natural gas and carbon dioxi...

Claims

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Application Information

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IPC IPC(8): B01J23/83C01B3/40
CPCY02P20/52
Inventor 王昊余汉涛种道文姜建波王春平
Owner CHINA PETROLEUM & CHEM CORP
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