1、Recent innovations and assessment of ammonia synthesis at an industrial

Jupiter Ionics in Australia is developing an electrochemical method (Macfarlane Simonov Ammonia Cell, MSA Cell) with projected capital cost reductions of 20–40% [42], while NitroVolt in Denmark offers modular, decentralized ammonia units (Nitrolyzer) targeting on-farm fertilizer production using only air, water, and renewable electricity [43].

2、Low

Here we examine the global N-fertilizer supply chain and analyse context-specific trade-offs of low-carbon ammonia production pathways.

3、Nitrogen Gas Fixation and Conversion to Ammonium Using Microbial

This study explored the possibility of converting N 2 into NH 4+ using anaerobic, single-chamber microbial electrolysis cells (MECs).

4、Economics of Emerging Ammonia Fertilizer Production Methods – a Role

Prospects of recent promising methods of producing ammonia without fossil fuels are discussed. Despite demonstrating efficiency gains over previous similar approaches, the novel biological and electrochemical pathways require further large improvements to compete with electricity-powered Haber-Bosch.

5、Trends in Biological Ammonia Production

This review presents three different biological approaches that drive the biochemical mechanisms to convert nitrogen gas, bioresources, or waste to bio-ammonia.

Methods to Convert Ammonia into Nitrogen Fertilizers

This article delves into how ammonia gas can be effectively utilized as a fertilizer source, exploring its properties, application methods, safety considerations, and environmental impacts.

Nitrogen reduction to ammonia at high efficiency and rates based on a

Ammonia (NH3) is a globally important commodity for fertilizer production, but its synthesis by the Haber-Bosch process causes substantial emissions of carbon dioxide.

Advancing ammonia synthesis: Pathways toward decarbonization and

A visual summary illustrates the electricity pathways used for ammonia production, with color-coding representing different energy inputs and technologies: green ammonia (renewable energy), pink ammonia (nuclear energy), black ammonia (coal), and grey ammonia (natural gas).

Uranium

EPFL researchers have created a uranium catalyst that converts nitrogen gas into ammonia using a unique binding method, potentially offering insights into more sustainable fertilizer production.

Electrocatalytic reduction of nitrogen oxide species to ammonia

This review provides a concise overview of recent advances in electrocatalytic NOx− and NOx reduction to ammonia, including detailed reaction mechanisms, catalyst development strategies based on both theoretical and experimental results, and the design and selection of electrolytic cells.

Ammonia-based nitrogen fertilizers (typically urea) are widely used in agriculture due to their ability to provide nitrogen for plant growth and development. because of their low solubility in water, these fertilizers are often converted into ammonia gas for easier application and improved utilization. Below are the methods for converting ammonia-based nitrogen fertilizers into ammonia gas:

1. Heating Method

Heating is one of the most common methods for converting ammonia-based nitrogen fertilizers into ammonia gas. Heat causes the amino group in urea to decompose into ammonia molecules, releasing ammonia gas. While simple to implement, this method requires significant energy input and may produce side reactions at high temperatures.

Operational Steps:

• Select Heating Equipment: Choose appropriate heating devices, such as electric furnaces or gas stoves.
• Adjust Temperature: Set the temperature based on the decomposition characteristics of urea. Excessive heat may trigger side reactions and reduce product purity.
• Control Duration: Heating time critically affects product quality and yield. Overheating may lead to excessive ammonia production, while insufficient heating may result in incomplete conversion.

2. Chemical Method

This method uses chemical reactions to convert ammonia-based nitrogen fertilizers into ammonia gas. Specific chemicals act as catalysts to accelerate reaction rates and improve selectivity.

Operational Steps:

• Choose Catalysts: Select catalysts like ammonium sulfate or ammonium chloride to enhance decomposition.
• Prepare Reaction Solution: Mix reactants in proper proportions to ensure thorough contact.
• Control Reaction Conditions: Precisely regulate temperature, pressure, and stirring speed to optimize product quality and yield.

3. Biological Method

This eco-friendly approach employs microorganisms or enzymes to catalyze the conversion of ammonia-based fertilizers into ammonia gas. It is energy-efficient but relies on specific biological agents.

Operational Steps:

• Screen Microorganisms/Enzymes: Identify microorganisms or enzymes capable of efficiently degrading ammonia-based fertilizers.
• Culture and Purify: Cultivate the selected microorganisms or enzymes and purify them for use.
• Apply: Utilize the purified biological agents in the conversion process to generate ammonia gas.

4. Physical Method

Physical methods convert ammonia-based fertilizers into ammonia gas without adding chemicals, though they may require substantial energy input.

Operational Steps:

• Choose Physical Approach: Select suitable physical techniques based on experimental conditions and target properties.
• Implement Operations: Follow protocols to ensure smooth reactions.
• Collect Products: Gather the produced ammonia gas for further processing or analysis.

5. Hybrid Method

This approach combines multiple methods above to achieve optimal conversion efficiency. It offers flexibility and adaptability based on specific needs and conditions.

Operational Steps:

• Determine Combination Ratios: Adjust the proportions of different methods according to experimental goals and conditions.
• Implement Combined Operations: Ensure effective integration of selected methods.
• Monitor and Adjust: Continuously track the process and make real-time adjustments to maintain product quality and yield.

The methods outlined above enable the efficient conversion of ammonia-based nitrogen fertilizers into ammonia gas, facilitating agricultural applications. When selecting a method, consider factors such as experimental conditions, target product properties, environmental impact, and energy consumption. Prioritizing sustainability ensures both effectiveness and ecological balance in practical use.