अमोनिया और कार्बन डाइऑक्साइड से यूरिया संश्लेषण

दुनिया का सबसे अधिक खपत किया जाने वाला ठोस नाइट्रोजन उर्वरक

Agriculture & Fertilizers Global Industrial Scale $60 billion

अवलोकन

Urea is the world's most widely used solid nitrogen fertilizer, produced by reacting ammonia with carbon dioxide at high temperature and pressure. The process conveniently uses the CO2 byproduct from hydrogen production in ammonia synthesis, making urea plants typically co-located with ammonia plants. Urea contains 46% nitrogen (the highest of any solid fertilizer), is non-explosive, highly water-soluble, and easy to handle and apply. It is also used in animal feed, urea-formaldehyde resins, and diesel exhaust fluid (DEF/AdBlue).

रासायनिक प्रक्रिया

Ammonia and CO2 (molar ratio 3-4:1) react at 180-210 degrees C and 140-250 bar in a high-pressure reactor to form ammonium carbamate, which dehydrates to urea. Single-pass conversion is approximately 65%. Unconverted carbamate is decomposed and recycled. The urea solution is concentrated by evaporation and formed into prills (spray tower) or granules (fluid bed).

2NH3 + CO2 <=>[180 degrees C, 150 bar] NH2COONH4 (ammonium carbamate formation, fast)
NH2COONH4 <=>[dehydration] CO(NH2)2 + H2O (urea formation, slow, equilibrium limited)

कच्चा माल

  • Ammonia (NH3) — Haber-Bosch process (Nitrogen source)
  • Carbon dioxide (CO2) — Byproduct of steam methane reforming for H2 (Carbon source)

अंतिम उत्पाद

  • Urea prills or granules (CO(NH2)2) — Nitrogen fertilizer, animal feed, DEF/AdBlue, resins (46% N, the highest of any solid fertilizer)
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Environmental Impact

Urea application to soil generates N2O (a potent greenhouse gas) through nitrification and denitrification. Ammonia volatilization from surface-applied urea wastes nitrogen and contributes to particulate matter formation. Urease inhibitors and controlled-release coatings can reduce these losses by 30-50%.

सुरक्षा संबंधी विचार

हालिया नवाचार

Urease inhibitors (NBPT) applied to urea granules reduce ammonia volatilization by 50%.
Polymer-coated urea provides controlled nitrogen release matching crop demand.
CO2 capture from flue gas for urea production could expand supply while reducing emissions.

उत्पादन पैमाना

190000000

टन/वर्ष

$60 billion

बाज़ार मूल्य

%(name)s में और Agriculture & Fertilizers

कॉपर सल्फेट कवकनाशी उत्पादन (बोर्डो मिश्रण)

Global Industrial Scale

ग्लाइफोसेट शाकनाशी संश्लेषण

Global Industrial Scale

जैविक नाइट्रोजन स्थिरीकरण वृद्धि (राइजोबियम टीके)

Global Industrial Scale

पाइरेथ्रॉयड कीटनाशक संश्लेषण

Global Industrial Scale

फॉस्फेट उर्वरक उत्पादन (सुपरफॉस्फेट और DAP)

Global Industrial Scale

मिट्टी pH संशोधन के लिए कृषि चूना

Global Industrial Scale

हेबर-बॉश अमोनिया संश्लेषण

Global Industrial Scale

Frequently Asked Questions

What industry uses अमोनिया और कार्बन डाइऑक्साइड से यूरिया संश्लेषण?
अमोनिया और कार्बन डाइऑक्साइड से यूरिया संश्लेषण is used in the agriculture & fertilizers sector at global industrial scale scale.
What process is involved in अमोनिया और कार्बन डाइऑक्साइड से यूरिया संश्लेषण?
Ammonia and CO2 (molar ratio 3-4:1) react at 180-210 degrees C and 140-250 bar in a high-pressure reactor to form ammonium carbamate, which dehydrates to urea. Single-pass conversion is approximately 65%. Unconverted carbamate is decomposed and recycled. The urea solution is concentrated by evaporat
What is the economic significance of अमोनिया और कार्बन डाइऑक्साइड से यूरिया संश्लेषण?
अमोनिया और कार्बन डाइऑक्साइड से यूरिया संश्लेषण has a market value of $60 billion and annual production of 190,000,000 tons.
What is the environmental impact of अमोनिया और कार्बन डाइऑक्साइड से यूरिया संश्लेषण?
Urea application to soil generates N2O (a potent greenhouse gas) through nitrification and denitrification. Ammonia volatilization from surface-applied urea wastes nitrogen and contributes to particulate matter formation. Urease inhibitors and controlled-release coatings can reduce these losses by 3
What raw materials are used in अमोनिया और कार्बन डाइऑक्साइड से यूरिया संश्लेषण?
The main raw materials include: Ammonia (NH3), Carbon dioxide (CO2).