Catalyst Support Materials for Ammonia Synthesis
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Solution Overview
Problem
Current ammonia synthesis methods, such as the Haber-Bosch process, are energy-intensive and generate significant CO2 emissions, making them unsustainable for a low-carbon future.
Innovation Solution
Development of catalyst support materials comprising (MgO)x(BaO)y(Al2O3)z and (MgO)x(SrO)y(Al2O3)z, which enhance the activity of ammonia-synthesizing catalysts like ruthenium, allowing for improved ammonia synthesis at lower temperatures and pressures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the Haber-Bosch process is used for ammonia synthesis, then ammonia production is achieved, but energy consumption is high and CO2 emissions are significant
Solution Approach 1:
The patent changes the chemical and physical parameters of the catalyst support material by incorporating specific metal oxides (BaO, SrO) with MgO and Al2O3 in controlled ratios. This modification alters the surface properties and electronic structure of the support, enabling more efficient catalyst performance at lower temperatures and pressures, thereby reducing energy consumption while maintaining ammonia production rates
Solution Approach 2:
The patent employs composite support materials combining multiple metal oxides (MgO, BaO, SrO, Al2O3) with complementary properties. BaO and SrO provide basic sites that enhance N2 activation, while MgO and Al2O3 contribute structural stability and surface area. This composite approach creates synergistic effects that improve catalytic activity and reduce the energy barrier for ammonia synthesis
2Productivity
If the Haber-Bosch process is used for ammonia synthesis, then ammonia production is achieved, but CO2 emissions are significant
Solution Approach 1:
By modifying the support material composition with basic metal oxides (BaO, SrO), the patent changes the reaction conditions to lower temperatures and pressures. This parameter change shifts the process away from conventional high-energy Haber-Bosch conditions toward more energy-efficient operation, thereby reducing CO2 emissions associated with energy generation while maintaining ammonia production capability
Solution Approach 2:
The patent converts the typically problematic interaction between catalyst and support into a beneficial effect. By designing the support with specific basic sites, the patent transforms what could be mere structural material into an active component that promotes N2 activation and reduces the energy barrier, thereby reducing CO2 emissions without sacrificing productivity
3Productivity
If conventional catalyst supports are used, then catalyst activity is limited, but new support materials increase synthesis rates
Solution Approach 1:
The patent systematically varies the compositional parameters (molar ratios of MgO, BaO, SrO, Al2O3) to optimize catalyst support performance. By controlling these parameters within specific ranges, the patent achieves enhanced ammonia synthesis rates while managing the complexity of the multi-component system through defined compositional windows
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 use of these catalyst support materials leads to increased ammonia synthesis rates and reduced energy consumption, thereby decreasing CO2 emissions and making the process more environmentally friendly.
Implementation Method 1
catalyst support materials comprising (MgO)x(BaO)y(Al2O3)z and (MgO)x(SrO)y(Al2O3)z, which enhance the activity of ammonia-synthesizing catalysts like ruthenium
Data Source
AI summary
Described herein are catalyst support materials for use in synthesizing ammonia (NH3) from nitrogen gas (N2) and hydrogen gas (H2) and methods of making the same. The support material may comprise (MgO)x(BaO)y(Al2O3)z and/or (MgO)x(SrO)y(Al2O3)z, on which an ammonia synthesis catalyst such as ruthenium is dispersed. When the catalyst support material comprises (MgO)x(BaO)y(Al2O3)z, x is from about 0.05 to about 0.7, y is from about 0.05 to about 0.6, and z is from about 0.3 to about 0.5. When the catalyst support material comprises (MgO)x(SrO)y(Al2O3)z, x is from about 0.4 to about 0.7, y is from about 0.05 to about 0.5, and z is from about 0.05 to about 0.3.