Latest News About How Is Urea Fertilizer Made

Here’s the latest general overview of how urea fertilizer is made, based on current industry practices.

Direct answer

• Urea is produced from natural gas (or other hydrocarbon feedstocks) through a two-stage process: first, ammonia is synthesized from nitrogen and hydrogen, and then ammonia is reacted with carbon dioxide to form urea. The resulting solid is then granulated into fertilizer products.

Key steps in the production process

• Feedstock and reforming: Natural gas (methane) is partially oxidized or steam-reformed to produce hydrogen and nitrogen-rich streams. This is typically done in an ammonia synthesis loop with a Haber-Bass-like chemistry, using iron-based catalysts at high temperatures and pressures. This stage also yields a significant amount of heat that is captured for process energy needs.
• Ammonia synthesis: Hydrogen and nitrogen are combined under high pressure (often 150–300 bar) with an iron catalyst to form ammonia (NH3). The reaction is exothermic and requires careful reactor design and heat management.
• CO2 capture and urea formation: The ammonia generated is then combined with carbon dioxide to form ammonium carbamate, which is then hydrogenolyzed to yield urea and water. This step is typically carried out in a high-pressure reactor followed by prilling or granulation to produce solid urea granules.

• Purification and packaging: The crude urea slurry is dried, granulated or prilled, cooled, and screened to meet particle size specifications before packaging and distribution.

  Frequently asked considerations

• Energy use: Urea production is energy-intensive, and plants often optimize energy integration and cogeneration to improve efficiency.
• Environmental aspects: Emissions controls focus on reducing nitrous oxide (N2O) releases during ammonia synthesis and managing CO2 from reforming, sometimes using carbon capture and utilization (CCU) options.
• Variants: Beyond standard granular urea, there are liquid nano-urea products and coated or stabilized forms aimed at improving efficiency and reducing volatilization in the field.

Illustration (simplified example)

• Feedstock: Natural gas → hydrogen + nitrogen streams
• Ammonia loop: N2 + 3H2 → 2NH3 (high-pressure reactor)
• Urea synthesis: 2NH3 + CO2 → NH2-CO-NH2 + H2O (ammonium carbamate route to urea)
• Output: Granular urea fertilizer ready for shipment

If you’d like, I can pull the latest country-specific production updates, plant-level news, or regulatory changes related to urea manufacturing and subsidies from recent reports. I can also summarize recent headlines or create a quick chart of trends (e.g., energy intensity or CO2 emissions per ton of urea) with sources.