Base Metal Catalyst for Hydrogen Cyanide Production
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Solution Overview
Problem
Current processes for producing hydrogen cyanide from methane and ammonia require high temperatures, are costly due to the use of noble metals, and are not selective, leading to competing side reactions and safety concerns.
Innovation Solution
A catalyst comprising a support with iron (Fe), cobalt (Co), or nickel (Ni) combined with tin (Sn), zinc (Zn), or indium (In) forms chemical compounds, allowing for hydrogen cyanide production at temperatures below 1000°C using cheaper metals and reducing side reactions, with the catalyst being susceptible to inductive heating by an alternating electromagnetic field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If high temperatures are used for the process, then the endothermic reaction can proceed, but competing side reactions of ammonia decomposition are thermodynamically favored
Solution Approach 1:
The patent changes the temperature parameter from conventional high temperatures (>1000°C) to moderate temperatures (200-1000°C) and changes the catalyst composition from noble metals to base metals with specific promoters, enabling the endothermic reaction to proceed with reduced side reactions
Solution Approach 2:
The patent introduces promoter metals (Sn, Zn, In, Pb, Bi) as intermediaries that modify the base metal catalyst surface properties, enabling selective hydrogen cyanide production at moderate temperatures by facilitating the desired reaction pathway while suppressing ammonia decomposition
2Reliability
If noble metal catalysts are used, then the process can proceed at high temperatures, but production costs increase
Solution Approach 1:
The patent replaces expensive noble metal catalysts with cheaper base metal catalysts (Fe, Co, Ni, Cu, Mn, Zn) combined with promoter metals, significantly reducing production costs while maintaining catalytic activity and selectivity for hydrogen cyanide production
Solution Approach 2:
The patent creates composite catalyst materials by combining base metals with promoter metals (Sn, Zn, In, Pb, Bi) in specific ratios, where the promoter enhances the activity and selectivity of the base metal, achieving noble metal-level performance at lower cost
3Productivity
If conventional catalysts are used, then the process can operate at high temperatures, but safety risks increase
Solution Approach 1:
The patent reduces the operating temperature parameter from >1000°C to 200-1000°C by introducing promoter metals that enhance catalyst activity, thereby maintaining productivity while significantly reducing safety risks associated with high-temperature operation
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 is selective for hydrogen cyanide production at lower temperatures, reducing production costs and safety risks while using cheaper metals, and can be reused by regeneration, enhancing process efficiency and safety.
Implementation Method 1
the catalyst being susceptible to inductive heating by an alternating electromagnetic field
Implementation Method 2
A catalyst comprising a support with iron (Fe), cobalt (Co), or nickel (Ni) combined with tin (Sn), zinc (Zn), or indium (In) forms chemical compounds, allowing for hydrogen cyanide production
Data Source
AI summary
The invention relates to a catalyst material comprising a support, a first metal and a second metal on said support. The first and second metals are in the form of a chemical compound. The first metal is Fe, Co or Ni, and the second metal is selected from the group consisting of Sn, Zn and In. The invention also relates to a process for the preparation of hydrogen cyanide (HCN) from methane (CH4) and ammonia (NH3), wherein the methane and ammonia are contacted with a catalyst according to the invention.