Ni-B Methane Reforming Catalyst for Sintering and Coke Suppression
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Solution Overview
Problem
Catalysts for methane reforming using carbon dioxide suffer from instability and sintering, leading to reduced activity due to coke deposition, which is exacerbated at high temperatures, necessitating the development of a more stable and active catalyst.
Innovation Solution
A catalyst comprising nickel, boron, and magnesium, with a boron content between 1 and 35 mol parts based on 100 mol parts of magnesium, is manufactured through hydrothermal synthesis to form a Ni-B intermetallic compound, enhancing structural stability and suppressing sintering and coke deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high temperature is used to increase conversion rate, then productivity is improved, but catalyst stability deteriorates due to sintering and coke deposition
Solution Approach 1:
The patent uses a composite catalyst structure consisting of Ni-B intermetallic compound particles dispersed on an MgO support. This composite material combines the high activity of Ni-B intermetallic compounds with the thermal stability and coke resistance of MgO, enabling the catalyst to maintain both high conversion rates and stability under high-temperature conditions.
Solution Approach 2:
The patent changes the chemical composition and structure of the catalyst by forming Ni-B intermetallic compounds with specific stoichiometric ratios (such as NiB, NiB2, NiB4, NiB6). This parameter change in the catalyst's chemical state enhances its resistance to sintering and coke deposition, allowing operation at high temperatures without sacrificing stability.
2Reliability
If noble metal is used to minimize sintering and side reactions, then catalyst stability is improved, but manufacturing cost increases
Solution Approach 1:
The patent replaces expensive noble metals with a cheaper alternative system consisting of nickel-based intermetallic compounds on MgO support. While individual catalyst particles may still undergo some deactivation, the overall system provides comparable stability at much lower cost, making the catalyst economically viable for industrial application.
Solution Approach 2:
The patent changes the material composition from noble metals to Ni-B intermetallic compounds, altering the chemical parameters of the catalyst. This substitution maintains the anti-sintering and anti-coking properties while dramatically reducing the manufacturing cost by using abundant and inexpensive nickel and magnesium materials.
3Ease of manufacture
If conventional impregnation method is used to manufacture catalyst, then ease of manufacture is improved, but catalyst stability deteriorates due to sintering and coke deposition
Solution Approach 1:
The patent employs a hydrothermal synthesis method that performs preliminary formation of Ni-B intermetallic compounds before the actual catalytic application. This preliminary action creates a pre-organized, thermodynamically stable intermetallic structure that is inherently resistant to sintering and coke deposition, thereby improving catalyst stability while maintaining manufacturing feasibility through a standardized hydrothermal process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The catalyst maintains high dispersion and activity during methane reforming reactions, with minimal sintering and coke formation, ensuring excellent catalytic performance and stability over 48 hours.
Implementation Method 1
hydrothermally synthesizing the mixture of step 1
Implementation Method 2
drying and sintering the hydrothermally synthesized composition of step 2
Implementation Method 3
sintering of Ni nanoparticles during the reforming reaction is suppressed
Implementation Method 4
a methane reforming reaction using carbon dioxide is a reaction in which carbon dioxide and methane are reacted with a catalyst at a high temperature to produce industrially useful synthesis gas
Data Source
Figure 1~2
AI summary
The present invention relates to catalyst for a methane reforming reaction and a manufacturing method thereof. More particularly, the objective of the present invention is to provide a highly dispersed nickel catalyst with secured structural stability that may be used in a methane reforming reaction using carbon dioxide, and a manufacturing method thereof, wherein the nickel is highly dispersed and has excellent structural stability during the methane reforming reaction, thereby providing a nickel catalyst that exhibits excellent catalytic performance in a methane reforming reaction using carbon dioxide.