Fibrous Zeolite Catalyst for Hydrocracking via Electrospinning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional hydrocracking catalysts have a large physical size, resulting in a lower surface area and reduced availability of active sites, which limits product yield and efficiency in the hydrocracking process.
Innovation Solution
A hydrocracking catalyst is developed in the form of fibers comprising zeolite and metal oxide, specifically nickel oxide or tungsten trioxide, created through electrospinning without the use of binder materials, enhancing the accessibility of reactants to active sites and increasing surface area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional hydrocracking catalysts are used in the form of pallets with large physical size, then the catalyst structure is simple and easy to manufacture, but the surface area is lower and availability of active sites is reduced
Solution Approach 1:
The catalyst is segmented into fibrous structures with diameters in the range of 1-10 micrometers, creating numerous thin fibers instead of large pallets. This segmentation dramatically increases the total surface area while maintaining mechanical integrity through the fibrous network structure.
Solution Approach 2:
The catalyst transitions from a two-dimensional pallet structure to a three-dimensional fibrous network. This dimensional change enables the catalyst to provide extensive surface area throughout the reactor volume, improving reactant accessibility to active sites while maintaining structural complexity in a controlled manner.
2Productivity
If conventional hydrocracking catalysts are used with large physical size, then the catalyst is easy to handle, but the product yield is below desired values due to lesser availability of active sites
Solution Approach 1:
The fibrous catalyst structure inherently provides a porous network with high surface area-to-volume ratio. The fibrous morphology creates interconnected pores that facilitate deep penetration of reactants to active sites distributed throughout the catalyst volume, significantly improving accessibility compared to dense pallet structures.
Solution Approach 2:
The catalyst dimensions are changed from millimeter-scale pallets to micrometer-scale fibers, fundamentally altering the physical parameters of the catalyst. This parameter change increases surface area by orders of magnitude and reduces diffusion path lengths, enabling much higher product yields while maintaining ease of operation through the robust fibrous network.
3Reliability
If conventional hydrocracking catalysts are used with large physical size, then the catalyst structure is simple, but the surface area is lower resulting in reduced catalytic activity
Solution Approach 1:
By segmenting the catalyst into numerous thin fibers with diameters of 1-10 micrometers, the total surface area is dramatically increased. This segmentation distributes active sites throughout the catalyst volume, ensuring high catalytic activity while maintaining structural simplicity through the repetitive fibrous morphology.
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 fiber-based catalyst achieves higher catalytic activity and selectivity, improving product yield and efficiency by providing a higher surface area and preventing agglomeration, thus overcoming the limitations of conventional catalysts.
Implementation Method 1
A distinguishing feature of the catalyst is the ease of accessibility of the reactants to the active sites, which is achieved by the open structure the (nano) fiber form provides without the presence of binding materials (to bind the metal oxide and zeolite together). Hence, the catalyst may be understood to have no binder material, and thus binder free.
Implementation Method 2
In hydrocracking, the catalyst is bi-functional performing the 1) 'cracking' action which involves the chain scission of high molecular weight hydrocarbons and the 2) 'hydrogenation' action which involves the saturation of cracking products or other unsaturates present in the feed-stock.
Data Source
AI summary
A hydrocracking catalyst for petroleum hydrocracking is provided, the hydrocracking catalyst provided in a form of at least one fiber, and the at least one fiber comprising at least one zeolite and at least one metal oxide. Methods are also provided to form the hydrocracking catalyst in the form of at least one fiber, particularly electrospinning.