ZrO2/Co3O4 Nanocomposite Catalyst for Methane Conversion
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Solution Overview
Problem
Current methane conversion technologies require high energy, expensive metal catalysts, and have low conversion efficiency, especially when converting methane into alcohols like methanol at ambient conditions.
Innovation Solution
A catalyst composite of ZrO2/Co3O4 nanocomposite, comprising Co3O4 nanoplates or NiCo2O4 nanowires with adsorbed ZrO2 nanoparticles, is used for electrochemical oxidation of methane at room temperature under ambient pressure, achieving high conversion efficiency of 60% or more into alcohols like 1-propanol and 2-propanol using a carbonate electrolyte.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional thermal catalysts or photocatalysts are used for methane conversion, then methane can be converted to carbon dioxide, but the process requires high reaction temperature and expensive metal catalysts
Solution Approach 1:
The patent changes the reaction conditions from high temperature thermal catalysis to room temperature electrochemical oxidation. By applying electrical potential to the ZrO2/Co3O4 catalyst, the reaction proceeds at room temperature without requiring expensive precious metal catalysts, thus resolving the contradiction between temperature requirements and catalyst cost
Solution Approach 2:
The patent uses ZrO2/Co3O4 as a non-precious metal catalyst that is cheaper than conventional metal catalysts. The catalyst maintains its activity and can be used repeatedly in electrochemical reactions, providing a cost-effective alternative to expensive metal catalysts while achieving methane conversion
2Productivity
If conventional methane conversion processes are used, then some conversion occurs, but the conversion efficiency is excessively low
Solution Approach 1:
The patent achieves high conversion efficiency (60% or more) by changing from thermal catalysis to electrochemical oxidation. The electrochemical process activates methane at room temperature with much lower energy input, dramatically improving both conversion efficiency and reducing energy loss compared to conventional high-temperature processes
Solution Approach 2:
The patent replaces thermal energy input with electrical energy input for methane activation. The electrochemical oxidation process uses electron transfer to activate methane molecules, substituting the conventional thermal mechanical energy input with a more efficient electrical field-driven mechanism, thereby improving conversion efficiency and reducing energy waste
3Quantity of substance
If syngas modification route is used for methanol production, then methanol can be produced, but additional energy is required beyond the energy emission from the reaction
Solution Approach 1:
The patent extracts the energy-intensive syngas modification step from the methanol production process. By directly oxidizing methane to methanol through electrochemical reactions, the process eliminates the need for separate syngas conversion steps, thereby removing the additional energy input requirement while maintaining methanol production
4Temperature
If bacteria (methanotrophs) are used for methane conversion at ambient conditions, then conversion can occur without high energy input, but the process requires complicated procedures and enzyme culture control
Solution Approach 1:
The patent replaces complex biological systems (bacteria and enzymes) with a simple inorganic catalyst system (ZrO2/Co3O4). The catalyst is stable, requires no culture conditions, and can be directly used in electrochemical reactions at ambient temperature, eliminating the device and process complexity associated with biological systems while maintaining ambient operation
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
This method efficiently converts methane into alcohols with high energy density at room temperature and ambient pressure, reducing the activation energy and operational costs, making it suitable for the petrochemical industry.
Implementation Method 1
electrochemical oxidation of methane gas at room temperature under ambient pressure
Implementation Method 2
ZrO2/Co3O4 nanocomposite as a catalyst
Implementation Method 3
ZrO2 nanoparticles adsorbed to the surface of the Co3O4 nanoplates or NiCo2O4 nanowires
Implementation Method 4
activation energy of methane is reduced and the potential of an electrode is controlled to produce alcohols with high efficiency even at room temperature under ambient pressure
Data Source
AI summary
The present disclosure relates to a catalyst composite for conversion of methane gas, which includes Co3O4 nanoplates and ZrO2 nanoparticles adsorbed to the surface of the Co3O4 nanoplates, and is used for converting methane gas into alcohols, and a method for conversion of methane gas using the same. When using the catalyst composite, it is possible to convert methane gas into alcohols with high efficiency under a mild condition of room temperature and ambient pressure.