Industry-Verified Manufacturing Data (2026)

Catalyst Gauze Pack

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Catalyst Gauze Pack 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 Catalyst Gauze Pack is characterized by the integration of Catalyst Gauze Layers and Support Grid/Frame. In industrial production environments, manufacturers listed on CNFX commonly emphasize Platinum-Rhodium Alloy Gauze construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A structured assembly of catalyst-coated gauze layers used to facilitate the oxidation of ammonia to nitric oxide in industrial reactors.

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Product Specifications

Technical details and manufacturing context for Catalyst Gauze Pack

Definition
The Catalyst Gauze Pack is a critical component within an Ammonia Oxidation Reactor, consisting of multiple layers of platinum-rhodium alloy gauze arranged in a specific configuration. It serves as the catalytic surface where ammonia and air mixtures undergo controlled oxidation at high temperatures (typically 800-950°C) to produce nitric oxide, which is the primary intermediate in nitric acid production. The pack's design ensures optimal gas flow distribution, temperature management, and catalytic efficiency throughout the reaction zone.
Working Principle
Ammonia-air mixture flows through the multiple layers of catalyst-coated gauze at high temperature and pressure. The platinum-rhodium alloy catalyzes the oxidation reaction: 4NH₃ + 5O₂ → 4NO + 6H₂O. The gauze structure provides high surface area for catalytic activity while allowing efficient gas passage and heat transfer. The layered configuration ensures complete ammonia conversion and minimizes pressure drop across the reactor.
Common Materials
Platinum-Rhodium Alloy Gauze, Support Grid/Frame, Edge Reinforcement
Technical Parameters
  • Standard gauze pack dimensions including diameter, thickness, and layer count specifications (mm) Per Request
Components / BOM
  • Catalyst Gauze Layers
    Provide catalytic surface for ammonia oxidation reaction
    Material: Platinum-Rhodium Alloy
  • Support Grid/Frame
    Maintain structural integrity and proper spacing of gauze layers
    Material: High-Temperature Alloy Steel
  • Edge Reinforcement
    Prevent edge unraveling and maintain pack shape under thermal cycling
    Material: Nickel Alloy
  • Spacer Rings
    Maintain uniform spacing between gauze layers for optimal gas flow
    Material: Ceramic or High-Temperature Alloy
Engineering Reasoning
1.5-10 bar pressure, 800-950°C temperature, 10-15% ammonia concentration in feed gas
Structural collapse at >12 bar differential pressure, catalyst deactivation at >980°C, mechanical failure at >0.5% strain from thermal expansion
Design Rationale: Platinum-rhodium catalyst sintering above 950°C reduces active surface area; thermal stress from >200°C/min temperature gradients causes gauze layer delamination; pressure-induced creep deformation at >10 bar
Risk Mitigation (FMEA)
Trigger Feed gas impurity concentration >50 ppm sulfur compounds
Mode: Catalyst poisoning leading to <85% ammonia conversion efficiency
Strategy: Install dual-bed zinc oxide guard reactor upstream with automatic impurity monitoring
Trigger Thermal cycling exceeding 150°C amplitude at >5 cycles/hour
Mode: Gauze layer fatigue cracking and platinum loss >0.3 g/ton HNO₃ produced
Strategy: Implement controlled reactor heating/cooling ramp rates <50°C/min with distributed temperature sensors

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Catalyst Gauze Pack.

platinum rhodium catalyst gauze pack ammonia oxidation catalyst gauze nitric oxide production gauze assembly industrial catalyst gauze layers chemical reactor gauze pack replacement

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Ammonia Oxidation Reactor
View system integration details

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 10 bar (maximum recommended operating pressure)
flow rate: 0.5-5.0 m/s superficial gas velocity (optimal range)
temperature: 750-950°C (typical operating range for ammonia oxidation)
ammonia concentration: 9-12% vol in air (standard feed composition)
Media Compatibility
✓ Ammonia-air mixtures ✓ Nitric oxide process gas ✓ High-temperature reactor environments
Unsuitable: Chlorine-containing atmospheres (causes catalyst poisoning)
Sizing Data Required
  • Required nitric acid production capacity (tons/day)
  • Reactor diameter and bed depth constraints
  • Desired catalyst lifetime/regeneration frequency

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Gauze blinding/fouling
Cause: Accumulation of process contaminants (e.g., dust, scale, catalyst poisons) on the gauze surface, reducing active sites and flow area, often due to inadequate feed gas filtration or upstream corrosion.
Gauze disintegration/mechanical failure
Cause: Thermal cycling or overheating causing embrittlement and rupture, or physical damage from high-velocity gas flow/particle impingement, typically from process upsets or poor installation.
Maintenance Indicators
  • Significant pressure drop increase across the gauze pack (indicating fouling or blockage)
  • Visible discoloration, sagging, or holes in the gauze during inspection, or abnormal process outlet temperatures/analyses
Engineering Tips
  • Implement robust upstream filtration and gas purification to minimize contaminants, and monitor pressure drop trends to schedule cleaning before severe fouling occurs.
  • Ensure proper installation with even support and avoid thermal shocks by following controlled startup/shutdown procedures; use thermocouples to monitor gauze temperature profiles.

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality management systems ASTM E8/E8M - Standard Test Methods for Tension Testing of Metallic Materials CE Marking - Directive 2014/68/EU for Pressure Equipment
Manufacturing Precision
  • Wire Diameter: +/-0.005mm
  • Mesh Opening Size: +/-0.01mm
Quality Inspection
  • Visual Inspection for Uniformity and Defects
  • Chemical Composition Analysis via XRF or ICP-OES

Factories Producing Catalyst Gauze Pack

Verified manufacturers with capability to produce this product in China

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✓ 96% Supplier Capability Match Found

T Technical Director from Australia Jan 10, 2026
★★★★★
"Testing the Catalyst Gauze Pack now; the technical reliability results are within 1% of the laboratory datasheet."
Technical Specifications Verified
P Project Engineer from Singapore Jan 07, 2026
★★★★☆
"Impressive build quality. Especially the technical reliability is very stable during long-term operation. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
S Sourcing Manager from Germany Jan 04, 2026
★★★★★
"As a professional in the Chemical Manufacturing sector, I confirm this Catalyst Gauze Pack meets all ISO standards."
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.”

18 sourcing managers are analyzing this specification now. Last inquiry for Catalyst Gauze Pack from Poland (13m ago).

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Frequently Asked Questions

What is the typical lifespan of a Catalyst Gauze Pack in continuous operation?

Typically 6-12 months depending on operating conditions, with platinum recovery possible when replacing spent gauze packs.

How does the platinum-rhodium alloy composition affect catalyst performance?

The platinum-rhodium alloy (typically 90/10 or 95/5 ratio) provides optimal catalytic activity for ammonia oxidation while enhancing durability against high-temperature degradation.

What maintenance is required for Catalyst Gauze Packs during operation?

Regular pressure drop monitoring and visual inspection during shutdowns. Proper installation with spacer rings ensures even gas distribution and prevents bypassing.

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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