Carbonized Cellulose Fiber Catalyst Support for High Nanoparticle Dispersion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for preparing catalyst supports from natural cellulose fibers face challenges in achieving a large surface area and uniform pore distribution while ensuring physical and chemical stability, and in supporting metal catalyst nanoparticles in a highly dispersed state at a low cost.
Innovation Solution
The method involves treating natural cellulose fibers with an electron beam, followed by heat treatment in a hydrogen and nitrogen atmosphere, and chemical treatment with acidic solutions to introduce oxidizing groups, allowing for the support of metal catalyst nanoparticles via chemical vapor deposition or impregnation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If natural cellulose fibers are used as catalyst support, then cost is reduced, but surface area and pore distribution are insufficient
Solution Approach 1:
The patent applies electron beam irradiation to change the physical and chemical parameters of natural cellulose fibers, transforming them into activated carbon with enhanced surface area and improved pore distribution. This parameter change allows the use of low-cost natural materials while achieving high-performance catalyst support properties
Solution Approach 2:
The patent replaces traditional mechanical activation methods with electron beam irradiation, a form of energy-based treatment. This substitution enables more effective surface area development and pore structure formation in the carbonized cellulose fibers, resolving the contradiction between cost and performance
2Quantity of substance
If natural cellulose fibers are used as catalyst support, then manufacturing cost is reduced, but metal catalyst nanoparticle dispersion is poor
Solution Approach 1:
Electron beam irradiation fundamentally changes the surface parameters of cellulose fibers, creating activated carbon with enhanced surface area and pore structure. These parameter changes provide better anchoring sites for metal catalyst nanoparticles, achieving high dispersion without increasing manufacturing cost
Solution Approach 2:
The patent transforms natural cellulose fibers into porous activated carbon through electron beam irradiation and carbonization. The resulting porous structure with improved pore distribution provides extensive surface area and numerous anchoring sites, enabling excellent nanoparticle dispersion while maintaining low manufacturing cost
3Reliability
If henequen fibers are carbonized, then physical and chemical durability is improved, but micropore formation increases which is unsuitable for catalytic reactions
Solution Approach 1:
The patent applies electron beam irradiation to change the carbonization parameters of henequen fibers, controlling the pore formation process to create a more favorable pore distribution for catalytic reactions while maintaining the physical and chemical durability provided by carbonization
Solution Approach 2:
The patent performs electron beam irradiation as a preliminary action before carbonization. This pre-treatment modifies the fiber structure in advance, preventing excessive micropore formation during subsequent carbonization while preserving the durability benefits, thus resolving the pore distribution issue before it becomes problematic
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 approach results in a catalyst support with a large surface area and uniform pore distribution, enabling the easy and efficient support of metal catalyst nanoparticles in a highly dispersed state, suitable for various catalytic reactions.
Implementation Method 1
treating natural cellulose fibers with an electron beam
Implementation Method 2
carbonization of the natural cellulose fibers by heat-treating of the electron beam-treated natural cellulose fibers in an atmosphere of hydrogen and nitrogen
Implementation Method 3
chemically treating the carbonized natural cellulose fibers with an acidic solution to introduce an oxidizing group to a surface of the carbonized natural cellulose fibers
Implementation Method 4
supporting metal catalyst nanoparticles on the carbonized cellulose catalyst support by chemical vapor deposition or impregnation
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The present disclosure relates to a catalyst having metal catalyst nanoparticles supported on carbonized natural cellulose fibers and a method of preparing the same, whereby natural cellulose fibers are subjected to specific pretreatment to increase a surface area and form defects on the surface thereof and metal catalyst nanoparticles are then supported on the carbonized cellulose catalyst support in a highly dispersed state, thereby providing improved catalysis while allowing production of the catalyst at low cost. The catalyst may be utilized for various catalytic reactions.