Ammonia Synthesis via CO2 Conversion to Solid Carbon
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Solution Overview
Problem
The Haber-Bosch process for ammonia production requires high-pressure equipment and energy-intensive conditions, leading to significant carbon dioxide emissions and high production costs, with existing methods failing to effectively minimize or eliminate these issues.
Innovation Solution
A method and system for concurrently forming ammonia and solid carbon products by reacting carbon oxides with nitrogen and a reducing agent in the presence of a catalyst, which allows for the separation and recovery of solid carbon and ammonia, reducing the need for high-pressure equipment and minimizing carbon dioxide emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the Haber-Bosch process is used for ammonia production, then ammonia can be produced, but high-pressure equipment and energy-intensive conditions are required leading to significant carbon dioxide emissions and high production costs
Solution Approach 1:
The patent converts carbon dioxide, a harmful greenhouse gas, into solid carbon products (such as carbon nanotubes, fullerenes, or graphite) through catalytic reactions. The process uses carbon dioxide as a carbon source to produce valuable solid carbon materials while simultaneously reducing atmospheric CO2 emissions. This transforms the harmful factor into a beneficial resource for both environmental protection and material production.
Solution Approach 2:
The invention changes the reaction parameters by using alternative catalysts (such as iron-based, nickel-based, or cobalt-based catalysts) and operating under milder conditions compared to the traditional Haber-Bosch process. The process operates at lower pressures and temperatures by utilizing catalytic pathways that enable carbon dioxide reduction and ammonia synthesis under more sustainable conditions, thereby reducing energy consumption and equipment requirements.
2Quantity of substance
If the Haber-Bosch process is used for ammonia production, then ammonia can be produced, but high-pressure equipment is required leading to high production costs
Solution Approach 1:
The patent employs catalysts that enable the reaction to proceed under milder pressure and temperature conditions. By using iron-based, nickel-based, or cobalt-based catalysts, the process achieves ammonia synthesis and carbon dioxide conversion at lower pressures compared to the high-pressure requirements of the Haber-Bosch process. This reduces the need for expensive high-pressure equipment and associated safety infrastructure, thereby lowering capital and operational costs.
Solution Approach 2:
The process simultaneously produces two valuable products: ammonia and solid carbon materials. By utilizing carbon dioxide as a feedstock to generate solid carbon products (such as carbon nanotubes, fullerenes, or graphite), the invention creates additional revenue streams and reduces waste disposal costs, thereby improving the overall economic viability of the ammonia production process.
3Quantity of substance
If conventional ammonia production methods are used, then ammonia can be produced, but energy-intensive conditions are required leading to high energy consumption
Solution Approach 1:
The invention utilizes catalytic reactions that lower the activation energy required for ammonia synthesis and carbon dioxide reduction. By employing iron-based, nickel-based, or cobalt-based catalysts, the process operates at lower temperatures and pressures compared to the energy-intensive Haber-Bosch process. This significantly reduces the energy input required for compression, heating, and reaction maintenance, thereby lowering overall energy consumption.
Solution Approach 2:
The process converts carbon dioxide into solid carbon products through exothermic or low-energy reactions catalyzed by metal catalysts. This conversion pathway requires substantially less energy than conventional ammonia production methods, as the catalytic pathways enable direct reduction of CO2 and simultaneous ammonia synthesis under milder conditions, thereby reducing the total energy footprint of the production process.
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 simplifies the production process, reduces equipment costs, and minimizes carbon dioxide emissions by converting carbon dioxide into solid carbon products, thereby alleviating environmental concerns and lowering energy consumption.
Implementation Method 1
reacting carbon oxides with nitrogen and a reducing agent in the presence of a catalyst
Implementation Method 2
reacting a mixture of a carbon oxide, such as carbon monoxide, carbon dioxide or mixtures thereof, with nitrogen and a reducing agent, such as methane or hydrogen
Data Source
AI summary
Methods of concurrently forming ammonia and solid carbon products include reacting a carbon oxide, nitrogen, and a reducing agent at preselected reaction conditions in the presence of a catalyst to form a solid carbon product entrained in a tail gas mixture comprising water and ammonia; separating entrained solid carbon product from the tail gas mixture; and recovering water and ammonia from the tail gas mixture. Systems for forming ammonia and solid carbon products from a gaseous source containing carbon oxides include mixing means for mixing the gaseous source with a reducing agent, reactor means for reacting at least a portion of the gaseous source with the reducing agent in the presence of a catalyst to produce the solid carbon products and a tail gas mixture comprising the ammonia, and solid separation means for separating the solid carbon products from the tail gas mixture.