Catalyst for producing synthesis gas and method for producing same

A catalyst, synthesis gas technology, applied in hydrogen/syngas production, chemical instruments and methods, catalyst activation/preparation, etc., can solve problems such as temperature increase

Inactive Publication Date: 2016-07-27
PETROLEO BRASILEIRO SA (PETROBRAS)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Addition of oxygen in the pre-reforming process incurs additional production costs due to purification of atmospheric air (when used as oxygen source)
In addition, due to the use of oxygen, there may be method limitations arising from the increase in temperature

Method used

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  • Catalyst for producing synthesis gas and method for producing same
  • Catalyst for producing synthesis gas and method for producing same
  • Catalyst for producing synthesis gas and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] This example illustrates the preparation of a catalyst according to the invention based on nickel, lanthanum and cerium on an alumina type support and promoted with boron.

[0053] With 70mL containing 2.95 grams of La (NO 3 ) 3 .6H 2 O, 8.82 g Ce(NO 3 ) 3 .6H 2 O and 33.03 g Ni(NO 3 ) 2 .6H 2 One hundred grams of commercially available theta-alumina (Axens SP Pore ​​volume is 0.7cm 3 / g, in the shape of a sphere with a diameter of 3 mm to 4 mm). The material was dried at 60 °C for 2 h, then heated in static air at a rate of 1 °C / min at a temperature ranging between 60 °C and 120 °C in the first step, and at 1.4 °C in the second step. Heat up to 250°C at a rate of °C / min. Then, the catalyst was calcined at 450°C for 4.5 hours. Thus obtaining a compound containing 7.6% (w / w) NiO, 1.0% (w / w) La 2 o 3 and 3% (w / w) Ce 2 o 3 Ni-Ce-La / θ-alumina catalyst. Then use 28mL containing 2.31 grams of boric acid (H 3 BO 4 ) in an aqueous solution wet spot impregnat...

Embodiment 2

[0055] This example illustrates the preparation of a catalyst according to the invention based on nickel, lanthanum and cerium on an alumina type support and promoted with silver.

[0056] With 70mL containing 2.95 grams of La (NO 3 ) 3 .6H 2 O, 8.82 g Ce(NO 3 ) 3 .6H 2 O and 33.03 g Ni(NO 3 ) 2 .6H 2 One hundred grams of commercially available theta-alumina (Axens SP Pore ​​volume is 0.7cm 3 / g, in the shape of a sphere with a diameter of 3 mm to 4 mm). The material was dried at 60 °C for 2 h, then heated in static air at a rate of 1 °C / min at a temperature ranging between 60 °C and 120 °C in the first step, and at 1.4 °C in the second step. Heat up to 250°C at a rate of °C / min. Then, the catalyst was calcined at 450°C for 4.5 hours. Thus obtaining a compound containing 7.6% (w / w) NiO, 1.0% (w / w) La 2 o 3 and 3% (w / w) Ce 2 o 3 Ni-Ce-La / θ-alumina catalyst. Then use 28mL containing 2.31 grams of silver nitrate (AgNO 3 ) in an aqueous solution wet spot impregn...

Embodiment 3

[0058] This example illustrates the performance of nickel-based commercially available catalysts for pre-reforming, which are known in the prior art, against carbon deposition under pre-reforming conditions for gas streams containing hydrocarbons, high in carbon monoxide, but free of olefins. Known in, with the symbols C1, C2, C3 and C4 said.

[0059] The catalysts were tested in a comparative manner in a thermogravimetric analysis apparatus (TGA Mettler Toledo TGA / SDTA851E). The test was carried out using 25 mg of catalyst which was crushed to obtain particles smaller than 0.088 mm (170 mesh). A pretreatment step was performed first by flowing 40 mL / min of a mixture containing 10% (v / v) hydrogen in argon-saturated water vapor at 15°C together with 40 mL / min of nitrogen (protective gas). The temperature was set in a value range between 100°C and 650°C at a heating rate of 10°C / min and maintained for 1 hour. The temperature was then lowered to 350°C by using a gas containing ...

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Abstract

The present invention aims at providing a catalyst and a method for producing same which, besides withstanding coke deposition on the surface of the catalyst better, does not introduce limitations to the process variables, retains acceptable activity thresholds during the entire steam reforming process, and has a lower production cost. This objective is achieved by means of a catalyst formed by an inorganic oxide support, a mixture of nickel, lanthanum and cerium, and a promoter element.

Description

technical field [0001] The present invention falls within the technical field of catalysts for the preparation of a gas mixture rich in hydrogen and carbon monoxide, known in the prior art as "synthesis gas" and of a method for the preparation of the catalyst. In particular, the invention relates to catalysts for the production of "synthesis gas" from hydrocarbon mixtures and to processes for obtaining said catalysts. Background technique [0002] Typically, a gas rich in hydrogen and carbon monoxide, known in the art as "syngas", is produced in bulk for use in petroleum refining, especially for hydrogenation reactions. In addition, "syngas" is widely used in the petrochemical industry to produce synthetic fuels, methanol, ammonia, and urea, among others. [0003] With regard to the production of synthetic fuels, "syngas" is produced by a process known in the art as steam reforming of hydrocarbons and then converted into synthetic fuels by "Fischer-Tropsch" synthesis. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J23/89B01J23/78B01J37/02
CPCB01J23/002B01J23/83B01J23/894B01J35/023B01J35/1014B01J35/1042B01J37/0201B01J37/0203B01J37/0205B01J37/16B01J2523/00C01B3/40C01B2203/0233C01B2203/1058C01B2203/1082Y02P20/52B01J2523/18B01J2523/31B01J2523/3706B01J2523/3712B01J2523/847B01J2523/305B01J21/04B01J37/0213B01J37/0236B01J37/024B01J37/088
Inventor A·M·丰塞卡比达特R·C·庞特斯比当古F·梅内塞斯帕萨雷利
Owner PETROLEO BRASILEIRO SA (PETROBRAS)
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