A kind of hierarchical porous supported nickel-based catalyst, preparation method and application

A nickel-based catalyst, catalyst technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as easy sintering, deactivation, carbon deposition, etc. effect, the effect of increasing diffusion and mass transfer rates

Active Publication Date: 2019-04-16
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

[0008] According to one aspect of the present application, a kind of multi-level porous supported nickel-based catalyst is provided to solve the problem that the existing supported nickel-based catalyst is easy to sinter and deactivate due to carbon deposition in high temperature reaction

Method used

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  • A kind of hierarchical porous supported nickel-based catalyst, preparation method and application
  • A kind of hierarchical porous supported nickel-based catalyst, preparation method and application
  • A kind of hierarchical porous supported nickel-based catalyst, preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0047] Preparation and Characterization of Catalyst Samples CAT-1~CAT-11 of Embodiment 1

[0048] Take a certain amount of nickel salt and dissolve it in 10ml of ethanol 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 nickel salt. The aluminum oxide adsorbed with nickel ions was vacuum-dried at 80° C. for 8 hours, calcined in an air atmosphere, and finally reduced with hydrogen to obtain the hierarchically porous supported nickel-based catalyst.

[0049] The nickel content on the hierarchically porous supported nickel-based catalyst was determined by ICP. The particle size range of nickel particles on the hierarchical porous supported nickel-based catalyst was observed by transmission scanning electron microscope.

[0050] See Table 1 for the relationship between the sample number and specific experimental parameters, the mass percentage of nickel element in the hierarc...

Embodiment 2

[0054] Embodiment 2 Catalyst reaction evaluation

[0055] 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.

[0056] Reaction conditions and CO 2 and CH 4 The relationship between the conversion rate is shown in Table 2.

[0057] When the reaction condition is A, the chromatographic detection result of the reaction tail gas is as follows figure 2 shown. It can be seen from the figure that the multi-level porous supported nickel-based catalyst provided by the present application has good selectivity, and the product is basically the main components of synthesis gas: hydrogen and ...

Embodiment 3

[0066] Embodiment 3 Catalyst stability evaluation

[0067] Get 0.2g catalyst sample CAT-1 and place in the fixed-bed reactor of internal diameter 1cm, under the reaction condition A of embodiment 2, carry out catalyst stability evaluation, the result is as follows image 3 shown. Depend on image 3 It can be seen that the hierarchical porous supported nickel-based catalyst provided by the present application has excellent stability under normal pressure and 800°C reaction conditions, and the conversion rates of carbon dioxide and methane remain basically unchanged within 100 hours of reaction time.

[0068] The transmission electron microscope photos of the catalyst sample CAT-1 before and after the reaction are as follows: Figure 4 shown. Figure 4 (a) is a transmission electron micrograph of the sample CAT-1 before the reaction; Figure 4(b) is a transmission electron micrograph of sample CAT-1 after reacting at 800° C. for 102 hours. It can be seen from the figure tha...

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Abstract

The invention discloses a hierarchical porous supported nickel-based catalyst, a preparation method and application of the catalyst to a carbon dioxide methane reforming reaction. The hierarchical porous supported nickel-based catalyst is prepared from a carrier and an active ingredient dispersed on the carrier. The catalyst is characterized in that the carrier is selected from at least one of inorganic oxides and contains macropore with the average pore size larger than 50 nm and mesopore with the average pore size of 1 nm-50 nm, and nickel is adopted as the active ingredient. The hierarchical porous supported nickel-based catalyst is used for the carbon dioxide methane reforming reaction, has the excellent sintering resistance and carbon deposition resistance and has the important realistic significance on promoting industrialization of the carbon dioxide methane reforming reaction.

Description

technical field [0001] The application relates to a multi-level porous supported nickel-based catalyst, a preparation method and its application in the reforming reaction of carbon dioxide and methane, belonging to the field of petrochemical 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 efficie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J35/10B01J35/04B01J37/02B01J37/18B01J37/34C01B3/40
CPCY02P20/52
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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