Dye-Sensitized TiO2 Hybrid Catalyst for Syngas Production
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Solution Overview
Problem
Conventional syngas production technologies require external energy and lack control over the H2/CO ratio, limiting their efficiency and applicability in industrial processes.
Innovation Solution
A hybrid catalyst system featuring a rhenium (Re) catalyst and a cobalt (Co) catalyst grafted onto TiO2 semiconductor metal oxide, which produces hydrogen/carbon monoxide syngas without external energy and allows adjustable H2/CO ratios through visible-light irradiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional catalytic production methods are used, then syngas can be produced through independent catalytic conversion processes, but external energy is required and the H2/CO ratio cannot be controlled
Solution Approach 1:
The patent combines two different catalytic functions (CO2 reduction to CO and H2O reduction to H2) into a single integrated photocatalytic system. The dual-catalyst system on TiO2 surface enables simultaneous production of H2 and CO from CO2 and H2O under visible light irradiation, eliminating the need for separate processes and external energy input while providing control over H2/CO ratio through catalyst composition adjustment
Solution Approach 2:
The patent controls the H2/CO ratio by adjusting the composition and ratio of the dual catalysts (Re and Co catalysts) on the TiO2 support. By changing the catalyst parameters (type, amount, and ratio), the system can produce syngas with different H2/CO ratios to meet various industrial requirements, such as 2:1 for methanol production or 1:1 for hydroformylation
2Productivity
If conventional syngas production technologies are used, then hydrogen and carbon monoxide can be produced, but additional mixing processes are required
Solution Approach 1:
The patent merges the CO production and H2 production reactions into a single photocatalytic process occurring on the same catalyst surface. Both reactions proceed simultaneously under visible light irradiation, producing syngas directly without requiring separate reaction zones or additional mixing equipment, thus simplifying the overall process
Solution Approach 2:
The TiO2-supported dual-catalyst system performs multiple functions simultaneously: it acts as both the CO2 reduction catalyst and the H2O reduction catalyst, and also serves as the reaction platform for both transformations. This multi-functionality eliminates the need for separate production and mixing processes
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
Enables the direct production of syngas with controlled H2/CO ratios, enhancing industrial applications by eliminating the need for external energy and improving catalytic activity.
Implementation Method 1
visible-light induced syngas production
Implementation Method 2
dye-sensitized TiO2 hybrid system
Implementation Method 3
rhenium (Re) catalyst
Implementation Method 4
two-electron reduction to CO
Implementation Method 5
cobalt (Co) catalyst
Implementation Method 6
hydrogen evolution by water reduction
Data Source
AI summary
Disclosed is a hybrid catalyst system for the production of hydrogen/carbon monoxide syngas. The hybrid catalyst system includes a dye, a rhenium (Re) catalyst, and a cobalt (Co) catalyst grafted on a semiconductor metal oxide. The hybrid catalyst system can produce syngas without the aid of external energy and enables control over the ratio of hydrogen/carbon monoxide formed. Therefore, the hybrid catalyst system can find application in various industrial fields, including chemical fuel production.