Phosphorus-Doped Catalyst Composite for Lower-Temperature Hydrogen Release
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Solution Overview
Problem
Conventional catalysts for extracting hydrogen from monobenzyltoluene require high temperatures and are inefficient due to reduced reactivity and rapid degradation caused by coke formation, leading to high costs and short catalyst lifespan.
Innovation Solution
A catalyst composite is developed with phosphorus-doped metal oxide supports and platinum group nanoparticles, where sulfur is selectively adsorbed on the platinum particles to enhance dispersion and stability, allowing efficient hydrogen extraction at lower temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If high temperature reaction conditions (320°C or higher) are used for hydrogen extraction, then hydrogen can be extracted from monobenzyltoluene, but catalyst reactivity is reduced and catalyst life is shortened due to coke formation
Solution Approach 1:
The patent modifies the catalyst's chemical composition by incorporating phosphorus and sulfur dopants into the catalyst structure. This changes the catalytic properties to enable effective hydrogen extraction at lower temperatures (below 320°C), thereby reducing thermal stress and coke formation while maintaining catalyst stability and extending catalyst life
Solution Approach 2:
The patent creates a composite catalyst material combining metal oxide base catalyst with phosphorus and sulfur dopants. This composite structure provides synergistic effects where the dopants modify the electronic and surface properties of the catalyst, enabling reduced temperature operation while maintaining high activity and resistance to deactivation
2Quantity of substance
If platinum content in catalyst is reduced to lower costs, then manufacturing cost decreases, but catalyst activity and efficiency may be compromised
Solution Approach 1:
The patent changes the chemical composition of the catalyst by adding phosphorus and sulfur dopants that enhance the catalytic activity per unit of platinum. This allows reduction of platinum content while maintaining or improving hydrogen extraction efficiency through modified electronic structure and increased active sites
Solution Approach 2:
The patent uses phosphorus and sulfur dopants to create alternative active sites or enhance existing sites, effectively copying or supplementing the function of platinum. This reduces dependence on expensive platinum while maintaining catalytic productivity through the dopant-induced active sites
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 hydrogen extraction efficiency and stability at 320°C with reduced platinum content, minimizing costs and extending catalyst life.
Implementation Method 1
increase the degree of dispersion of platinum particles by doping phosphorus on a support
Implementation Method 2
sulfur is selectively adsorbed on the platinum particles by doping sulfur on a platinum catalyst
Implementation Method 3
thermochemical reaction equation for hydrogen extraction through decomposition of monobenzyltoluene
Data Source
AI summary
Disclosed are catalyst for extracting high purity hydrogen from organic hydrogen carrier and catalyst composite of preparing same. In detail, a catalyst composite comprising: a support comprising a metal oxide doped with phosphorus(P); and a catalyst comprising platinum group nanoparticle and sulfur(S) and supported on the support, wherein the platinum group nanoparticle may comprise a platinum group element, and the sulfur(S) may be doped on a part or all of a surface of the platinum group nanoparticle. The present disclosure enables easily and quickly support metal nanoparticles on powder and bead-structured supports using wet-impregnation.