Industry-Verified Manufacturing Data (2026)

High-Pressure Ammonia Synthesis Reactor

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard High-Pressure Ammonia Synthesis Reactor used in the Chemical Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical High-Pressure Ammonia Synthesis Reactor is characterized by the integration of Pressure Vessel Shell and Catalyst Baskets. In industrial production environments, manufacturers listed on CNFX commonly emphasize Low-Alloy Steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

Industrial pressure vessel for catalytic ammonia production from nitrogen and hydrogen

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Product Specifications

Technical details and manufacturing context for High-Pressure Ammonia Synthesis Reactor

Definition
A specialized high-pressure reactor designed for the Haber-Bosch process of ammonia synthesis. This industrial machine facilitates the catalytic conversion of nitrogen and hydrogen gases into ammonia under controlled temperature and pressure conditions. It serves as the core reaction vessel in fertilizer manufacturing plants, enabling continuous production of ammonia as a primary feedstock for nitrogen-based fertilizers. The reactor's robust construction ensures safe operation under extreme process conditions while maintaining optimal catalytic efficiency.
Working Principle
Compressed nitrogen and hydrogen gases are introduced into the reactor vessel containing catalyst beds, where they undergo exothermic catalytic reaction at high pressure and temperature to form ammonia, which is then continuously withdrawn for downstream processing.
Common Materials
Low-Alloy Steel, Stainless Steel Cladding, High-Temperature Alloys
Technical Parameters
  • Maximum allowable working pressure (MPa) Customizable
  • Typical reaction temperature range (°C) Customizable
Components / BOM
  • Pressure Vessel Shell
    Contains high-pressure reaction environment
    Material: Low-alloy steel with corrosion-resistant cladding
  • Catalyst Baskets
    Hold and support catalyst particles in fixed beds
    Material: High-temperature alloy steel
  • Thermowell Assemblies
    Allow temperature measurement within catalyst beds
    Material: Stainless steel
  • Gas Distribution System
    Ensures uniform gas flow through catalyst beds
    Material: Stainless steel
  • Insulation Jacket Optional
    Maintains operating temperature and protects personnel
    Material: Mineral wool with aluminum cladding
Engineering Reasoning
150-300 bar at 400-500°C
350 bar internal pressure at 550°C wall temperature
Design Rationale: Creep rupture due to prolonged exposure to hydrogen embrittlement and thermal stress exceeding the yield strength of low-alloy steel (e.g., SA-387 Grade 11) at elevated temperatures
Risk Mitigation (FMEA)
Trigger Catalyst bed channeling from uneven gas distribution
Mode: Localized hot spot formation exceeding 600°C
Strategy: Installation of radial flow distributors with pressure drop monitoring at 0.5 bar intervals
Trigger Thermal cycling from frequent shutdowns (≥3 cycles/week)
Mode: Fatigue cracking at nozzle-to-shell junctions
Strategy: Post-weld heat treatment to 650°C for 2 hours per ASME Section VIII Division 2

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for High-Pressure Ammonia Synthesis Reactor.

Ammonia Converter Haber-Bosch Reactor Synthesis Reactor High-Pressure Reactor high-pressure ammonia synthesis reactor design ammonia production reactor catalyst baskets industrial pressure vessel for fertilizer manufacturing low-alloy steel ammonia reactor specifications catalytic ammonia synthesis reactor temperature cont

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: 150-300 bar (standard industrial operating pressure)
flow rate: Varies by plant capacity (typically 100-3000 Nm³/h per reactor train)
temperature: 400-500°C (typical operating range for Haber-Bosch process)
slurry concentration: Not applicable (gas-phase catalytic reactor)
Media Compatibility
✓ Nitrogen-Hydrogen synthesis gas mixtures ✓ Catalyst beds (typically iron-based with promoters) ✓ High-purity process streams with minimal contaminants
Unsuitable: Oxygen-containing environments (risk of explosive mixtures and catalyst poisoning)
Sizing Data Required
  • Required ammonia production capacity (tonnes/day)
  • Available synthesis gas feed composition and pressure
  • Catalyst bed volume and expected lifetime

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Stress Corrosion Cracking (SCC)
Cause: Combination of high tensile stress from internal pressure and corrosive environment from ammonia/hydrogen/nitrogen mixture at elevated temperatures, particularly in weld heat-affected zones or areas with residual stresses.
High-Temperature Hydrogen Attack (HTHA)
Cause: Exposure to hydrogen at temperatures above 400°F (204°C) and high pressures, causing decarburization of steel, formation of methane bubbles at grain boundaries, and eventual loss of material strength and ductility.
Maintenance Indicators
  • Sudden, unexplained pressure drop across the reactor indicating potential internal leakage or catalyst bed channeling
  • Abnormal temperature profile along the reactor length (hot spots or cold spots) suggesting catalyst deactivation, flow maldistribution, or insulation failure
Engineering Tips
  • Implement continuous online monitoring of reactor wall temperatures using thermocouples at multiple axial and circumferential locations to detect hot spots early and prevent thermal runaway or localized overheating.
  • Establish a rigorous inspection program using advanced NDT techniques (such as phased array ultrasonic testing and acoustic emission monitoring) during planned shutdowns to detect early-stage cracking, particularly in welds, nozzles, and areas of high stress concentration.

Compliance & Manufacturing Standards

Reference Standards
ISO 16528-1:2007 (Boilers and pressure vessels) ASME Boiler and Pressure Vessel Code Section VIII Division 2 EN 13445-3:2021 (Unfired pressure vessels)
Manufacturing Precision
  • Bore diameter tolerance: +/-0.05mm
  • Flange flatness: 0.08mm across sealing surface
Quality Inspection
  • Hydrostatic pressure test at 1.5x design pressure
  • Ultrasonic testing of all welds for defects

Factories Producing High-Pressure Ammonia Synthesis Reactor

Verified manufacturers with capability to produce this product in China

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✓ 93% Supplier Capability Match Found

T Technical Director from Germany Feb 23, 2026
★★★★★
"The High-Pressure Ammonia Synthesis Reactor we sourced perfectly fits our Chemical Manufacturing production line requirements."
Technical Specifications Verified
P Project Engineer from Brazil Feb 20, 2026
★★★★☆
"Found 26+ suppliers for High-Pressure Ammonia Synthesis Reactor on CNFX, but this spec remains the most cost-effective. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
S Sourcing Manager from Canada Feb 17, 2026
★★★★★
"The technical documentation for this High-Pressure Ammonia Synthesis Reactor is very thorough, especially regarding Design Pressure (MPa)."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

19 sourcing managers are analyzing this specification now. Last inquiry for High-Pressure Ammonia Synthesis Reactor from Vietnam (54m ago).

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Frequently Asked Questions

What materials are used in the construction of this ammonia synthesis reactor?

The reactor is constructed with low-alloy steel for the pressure vessel shell, stainless steel cladding for corrosion resistance, and high-temperature alloys for components exposed to extreme conditions during ammonia synthesis.

What are the key components included in the reactor's bill of materials?

The BOM includes catalyst baskets for holding the catalytic material, a gas distribution system for uniform reactant flow, an insulation jacket for temperature maintenance, the pressure vessel shell, and thermowell assemblies for temperature monitoring.

What are the typical operating specifications for this ammonia synthesis reactor?

Specifications include catalyst bed height, design pressure in MPa, design and operating temperatures in °C, reactor volume in m³, and shell thickness in mm, all engineered for efficient high-pressure ammonia production.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Chemical Manufacturing sector.

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