Nano-nickel Catalyst Sharp Microstructures Pressure Drop
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Solution Overview
Problem
Conventional catalysts with small particle sizes face challenges in industrial processes due to pressure drops and inefficiencies in treating large amounts of exhaust gas, and existing nano-nickel catalysts lack effectiveness in converting carbon oxides into low-carbon hydrocarbons.
Innovation Solution
A nano-nickel catalyst with sharp microstructures is developed, increasing surface area and maintaining specific distances between catalysts to enhance reactant contact and reaction efficiency, used in a hydrogenation device to convert carbon oxides into low-carbon hydrocarbons like methane, ethane, or propane at atmospheric pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the particle size of the catalyst is minimized to increase surface area, then the contact opportunity between catalyst and reactants increases, but the pressure drop increases significantly when fluid passes through the fixed bed reactor
Solution Approach 1:
The catalyst particles are segmented into a core-shell structure with a porous core and an active shell layer. This segmentation allows the interior of the particle to provide surface area while the shell structure maintains structural integrity and reduces pressure drop by allowing better fluid distribution through the particle network.
Solution Approach 2:
The catalyst employs a porous support material with controlled pore size and distribution. The porous structure increases the internal surface area available for catalysis while the interconnected pore network reduces flow resistance and pressure drop across the catalyst bed by facilitating smoother fluid passage.
2Stress or pressure
If the particle size of the catalyst is formed larger in the shape of balls or cylinders, then the pressure drop decreases, but the contact opportunity between catalyst and reactants decreases
Solution Approach 1:
The catalyst design transitions from considering only external particle surface area to utilizing internal surface area through porous structures and core-shell configurations. This dimensional transition allows the catalyst to provide extensive active surface area within particles of size optimized for acceptable pressure drop characteristics.
3Productivity
If conventional catalysts are used for treating large amounts of exhaust gas, then the reaction efficiency decreases due to pressure drops, but increasing pressure to push gaseous reactants increases energy consumption
Solution Approach 1:
The catalyst design changes physical parameters including particle density, pore size distribution, and surface area to volume ratio. These parameter changes enable the catalyst to achieve high reaction efficiency at lower pressure drops, reducing the energy required to maintain gas flow through the reactor while treating large volumes of exhaust gas.
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 nano-nickel catalyst with sharp microstructures improves reaction efficiency and conversion rates of carbon oxides into low-carbon hydrocarbons, allowing for high-yield production at atmospheric pressure, suitable for treating large amounts of exhaust gas without significant pressure drops.
Implementation Method 1
a nano-nickel catalyst with sharp microstructures is developed, increasing surface area and maintaining specific distances between catalysts to enhance reactant contact and reaction efficiency
Implementation Method 2
used in a hydrogenation device to convert carbon oxides into low-carbon hydrocarbons like methane, ethane, or propane
Data Source
AI summary
A nano-nickel catalyst and a hydrogenation device of carbon oxides are provided. The hydrogenation device is configured to reduce the carbon oxides to form low carbon hydrocarbons. The nano-nickel catalyst has a metallic nickel body and a plurality of microstructures connecting with at least one surface of the metallic nickel body. The microstructures are sharp, and have a length-diameter ratio ranging from 2 to 5.