Dehydroaromatization Catalyst for Methane Conversion
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Solution Overview
Problem
Existing methods for converting methane into aromatic compounds are energy-intensive, require large-scale operations, and result in significant CO2 emissions, making them unsuitable for small and medium-sized natural gas fields and environmentally unfriendly.
Innovation Solution
A dehydroaromatization catalyst is developed using a novel preparation method involving dealumination of zeolite through hydrothermal treatment and supporting molybdenum (Mo) within the dealuminated zeolite, optimizing the Brønsted acid sites and coke composition to enhance catalyst efficiency and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional methane conversion methods are used, then aromatic compounds can be produced, but high energy consumption and significant CO2 emissions occur
Solution Approach 1:
The patent changes the chemical parameters of the catalyst system by incorporating specific metal compounds (Mo, Fe, Ni, Co, Mn, Zn, Cu, Ag, Au, Pt, Pd, Ir, Rh) and their oxides into the zeolite structure. This parameter change enables the reaction to proceed at lower temperatures (700-900°C) compared to conventional methods, reducing energy consumption while maintaining aromatic compound production
Solution Approach 2:
The patent creates a composite catalyst material combining zeolite support with multiple metal compounds and oxides. This composite structure (zeolite-Mo-Fe-Ni-Co-Mn-Zn-Cu-Ag-Au-Pt-Pd-Ir-Rh) provides synergistic effects that enhance catalytic activity for methane dehydroaromatization, achieving high aromatic yield with reduced energy input
2Quantity of substance
If conventional methane conversion methods are used, then aromatic compounds can be produced, but significant CO2 emissions occur
Solution Approach 1:
The patent converts the harmful CO2 emission problem into a beneficial process by using the catalyst to selectively promote dehydroaromatization reactions that produce valuable aromatic compounds (benzene, toluene, xylene) from methane without significant CO2 formation. The catalyst transforms what would be waste emissions into useful chemical products
3Quantity of substance
If conventional methane conversion methods are used, then aromatic compounds can be produced, but large-scale operations are required
Solution Approach 1:
The patent changes the operational parameters by enabling the reaction to proceed at moderate temperatures (700-900°C) and atmospheric pressure using the novel catalyst. These parameter changes allow the process to be implemented in small to medium-scale reactors suitable for local natural gas fields, eliminating the need for large-scale industrial facilities
4Quantity of substance
If conventional methane conversion methods are used, then aromatic compounds can be produced, but high energy input is required due to endothermic reaction
Solution Approach 1:
The patent develops a composite catalyst with zeolite and multiple metal compounds that provides active sites for exothermic dehydrogenation steps. This composite structure enables the overall endothermic dehydroaromatization process to proceed with reduced net energy input by coupling exothermic and endothermic reaction steps
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 achieves high methane conversion rates, stable dehydroaromatization performance, and improved cumulative yield of aromatic compounds, while reducing CO2 emissions and being suitable for both small and large-scale reaction devices.
Implementation Method 1
dealuminating a zeolite by hydrothermal treatment
Implementation Method 2
dealuminating a zeolite by hydrothermal treatment
Implementation Method 3
supporting molybdenum (Mo) in the dealuminated zeolite
Implementation Method 4
dehydroaromatization catalyst capable of preparing an aromatic compound at a high yield using methane
Data Source
AI summary
The present invention relates to a dehydroaromatization catalyst and a preparation method thereof, the dehydroaromatization catalyst comprising the steps of: dealuminating zeolite by hydrothermal treatment at a first temperature; and supporting molybdenum (Mo) on the dealuminated zeolite.