Ammonia Combustion via Hydrogen Mediator Ignition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Flame-retardant ammonia gas is difficult to ignite and maintain stable combustion due to its high ignition energy requirement and slow combustion rate compared to carbon-based fuels, leading to incomplete combustion and production of unburned ammonia or nitrogen oxides.
Innovation Solution
An ammonia combustion method that involves separating hydrogen gas from ammonia, igniting the hydrogen gas to warm the combustion chamber, and then using the hydrogen gas to ignite and sustain the ammonia gas, allowing for adjustable combustion energy and stable combustion by monitoring combustion state information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If ammonia gas is directly combusted, then carbon dioxide emissions are reduced, but ignition difficulty and unstable combustion occur due to high ignition energy requirement and slow combustion rate
Solution Approach 1:
The patent introduces hydrogen gas as an intermediary substance to facilitate the combustion of ammonia gas. The hydrogen gas is first combusted to heat the combustion chamber, creating favorable conditions for subsequent ammonia ignition and combustion. This mediator approach resolves the contradiction by enabling stable ammonia combustion without direct difficult ignition.
Solution Approach 2:
The patent performs preliminary combustion of hydrogen gas to heat the combustion chamber before introducing ammonia gas for combustion. This preliminary action raises the temperature to a level that facilitates ammonia ignition and ensures stable combustion, thereby resolving the ignition difficulty and combustion instability issues.
2Reliability
If more hydrogen gas is supplied to aid ammonia ignition, then combustion stability improves, but hydrogen gas consumption increases
Solution Approach 1:
The patent employs feedback control by detecting combustion state information and adjusting the hydrogen gas supply amount accordingly. The control unit reduces hydrogen supply when ammonia combustion becomes stable, thereby maintaining combustion reliability while minimizing hydrogen gas consumption and avoiding waste.
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
Effectively initiates and maintains stable combustion of ammonia gas, reducing wasteful hydrogen gas consumption and enabling efficient energy adjustment for various combustion applications.
Implementation Method 1
separating and producing hydrogen gas from ammonia gas
Implementation Method 2
combusting the hydrogen gas by performing an ignition discharge on the hydrogen gas supplied into the combustion chamber
Implementation Method 3
the flame is transferred from the combusted hydrogen gas to the supplied ammonia gas
Implementation Method 4
igniting the ammonia gas in the combustion chamber from the combusted hydrogen gas
Data Source
AI summary
An ammonia combustion method for combusting ammonia gas in a combustion chamber 4 includes steps of separating and producing hydrogen gas from ammonia gas, supplying the separated and produced hydrogen gas into the combustion chamber 4, combusting the hydrogen gas by performing an ignition discharge on the hydrogen gas supplied into the combustion chamber 4, and igniting the ammonia gas in the combustion chamber 4 from the combusted hydrogen gas.