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Catalyst, as well as preparation method and application thereof

A catalyst and carrier technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as carbon deposition, easy sintering, deactivation, etc., to achieve selective Good performance, good stability and high activity

Inactive Publication Date: 2017-06-09
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] According to one aspect of the present application, a catalyst is provided to solve the problem that existing supported metal catalysts are easily sintered and deactivated by carbon deposition in high temperature reactions

Method used

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  • Catalyst, as well as preparation method and application thereof
  • Catalyst, as well as preparation method and application thereof
  • Catalyst, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Preparation and Characterization of Catalyst Samples CAT-1~CAT-14 of Embodiment 1

[0061] Take a certain amount of active component metal salt and dissolve it in 10ml of water to make a solution, add 5g of hierarchical porous alumina, ultrasonic impregnation for a period of time, filter to remove the solvent and excess unabsorbed metal salt. The aluminum oxide adsorbed with metal ions was vacuum-dried at 80° C. for 8 hours, calcined in the air atmosphere, and finally reduced with hydrogen to obtain a multi-level porous supported multi-metal catalyst. If the above catalyst needs to be modified, the modified component precursor (such as alkali metal salt, alkaline earth metal salt or rare earth metal salt) can be made into a solution with the active component metal salt, and then impregnated, dried, roasted and reduction.

[0062] The relationship between the sample number and specific experimental parameters, iron series elements, noble metal elements, alkali metal ele...

Embodiment 2

[0068] Embodiment 2 Catalyst reaction evaluation

[0069] Take 0.2g of the catalyst sample CAT-1 and place it in a fixed-bed reactor with an inner diameter of 1cm. After hydrogen reduction is performed online, the temperature is adjusted to the reaction temperature. switch gas to CO 2 and CH 4 Mixed gas, N 2 is the internal standard. After the reaction, the gas is cooled and enters the gas chromatograph to detect the concentration of each substance, and calculate the CO 2 and CH 4 conversion rate.

[0070] Table 2

[0071]

[0072] CO 2 and CH 4 Conversion rates for are calculated using the following formulas:

[0073]

[0074]

[0075] where F CO2,in and F CO2,out is the CO in the feed gas and reaction tail gas 2 volume fraction flow; F CH4,in and F CH4,out CH in the reactants and products, respectively 4 volume fraction flow.

[0076] Under the same reaction conditions, the reaction results of catalyst samples CAT-2 to CAT-29 were similar to those of...

Embodiment 3

[0077] Embodiment 3 Catalyst stability evaluation

[0078] 0.2 g of catalyst samples CAT-1, CAT-2 and CAT-17 were respectively placed in a fixed-bed reactor with an inner diameter of 1 cm, and the catalyst stability was evaluated under the reaction condition A of Example 2.

[0079]The stability test results of catalysts CAT-1, CAT-2 and CAT-17 are shown in Fig. 1(a) and Fig. 1(b). It can be seen from Figure 1 that the multimetal catalysts CAT-1 and CAT-2, which contain noble metals and iron-series elements in the active elements, under normal pressure and 800 ° C reaction conditions, within 204 hours of reaction time, the conversion of carbon dioxide and methane The rate maintains good stability. Active elements that do not contain noble metal elements have slightly lower catalyst stability. Catalyst stability: CAT-2>CAT-1>CAT-17, indicating that the addition of noble metals improves the stability of cobalt-based catalysts. At the same time, the data in Figure 1(a) and Fig...

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Abstract

The invention discloses a catalyst which comprises a carrier and an active component dispersed over the carrier and is characterized in that the carrier is selected from at least one of inorganic oxides; the carrier comprises macropores and mesoporouses; the active component comprises an active element; the active element comprises a ferrum element; the ferrum element is ferrum and / or cobalt. The catalyst, as a high-temperature stable catalyst of a carbon dioxide reforming methane reaction, can produce synthetic gas and achieves emission reduction and recycling of carbon dioxide. Under a reaction condition of normal atmosphere and 800 DEG C, the multilevel pore loading metal catalyst shows excellent comprehensive catalytical performance and has very good stability, sintering resistance and carbon deposit resistance in addition to high activity and good selectivity.

Description

technical field [0001] The application relates to a catalyst, a preparation method and its application in carbon dioxide methane reforming reaction, belonging to the field of chemical industry. Background technique [0002] Coal, oil and natural gas are the three major fossil energy resources. my country is rich in coal resources, but in recent years, the pollution of the atmosphere, soil and groundwater during coal mining and utilization has become more and more serious, limiting its large-scale use. However, my country's oil reserves are small and must rely on imports, resulting in high oil usage costs. In recent years, as my country's shale gas reserves have jumped to the forefront of the world, more and more attention has been paid to the development and utilization of natural gas. The country has introduced relevant policies to encourage the comprehensive and efficient utilization of natural gas, and the efficient utilization of natural gas has risen to the national st...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J23/75B01J23/755B01J23/78B01J23/83B01J23/89C01B3/40
CPCB01J23/745B01J23/75B01J23/755B01J23/78B01J23/83B01J23/8906B01J23/8913B01J23/892B01J23/894B01J23/8946C01B3/40C01B2203/0238C01B2203/1052C01B2203/1058C01B2203/1064C01B2203/107C01B2203/1094Y02P20/52
Inventor 陈毓敏郭国聪徐忠宁王志巧陈青松谭洪梓
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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