Our Product Lines

Crystal Industrial’s Modular Hydrotreater Plant Product Lines

Crystal Industrial Syndicate is a globally trusted name in the fabrication and engineering of modular hydroprocessing systems. As the demand for cleaner fuels, operational efficiency, and environmental compliance continues to grow, our modular hydrotreater plant solutions stand at the intersection of innovation, customization, and reliability.

This page presents an in-depth overview of our primary modular plant product lines, each designed to address specific feedstock challenges, product requirements, and regulatory landscapes. Whether you’re refining diesel for Euro VI compliance, upgrading naphtha for petrochemical use, or processing jet fuel to meet aviation standards, Crystal Industrial has a tailored, modular solution ready for deployment.

Diesel Hydrotreater (DHT) Modules

Our Diesel Hydrotreater (DHT) Modules are designed to remove sulfur, nitrogen, and other contaminants from diesel-range feedstocks, transforming them into ultra-low sulfur diesel (ULSD) compliant with the most stringent fuel standards globally.

Technical Specifications:
  • Capacity Ranges: 500 BPD to 20,000 BPD, scalable via modular parallel units.
  • Operating Conditions: High-pressure reactors up to 80 bar and temperatures between 300–400°C.
  • Reactor Design: Fixed-bed design with optimized internals for uniform flow distribution and enhanced catalyst contact.
  • Supported Catalyst Types: CoMo and NiMo-based catalysts on alumina supports, customizable for performance and lifecycle.
Compliance Standards:

Crystal Industrial’s DHT modules meet or exceed:

  • Euro V and Euro VI fuel sulfur limits (<10 ppm)
  • US EPA Tier 3 and IMO 2020 marine fuel regulations
  • Bharat Stage VI (BS-VI) fuel emission norms (India)
Key Features:
  • High conversion rates of sulfur and nitrogen compounds
  • Advanced heat integration for energy efficiency
  • Digital control systems for real-time process monitoring and quality control
  • Compact footprint with plug-and-play integration for refineries and terminals

Naphtha Hydrotreater (NHT) Modules

Our Naphtha Hydrotreater (NHT) Modules are engineered to purify naphtha feedstreams by removing sulfur, nitrogen, oxygenates, olefins, and metals before the feedstock is sent to a catalytic reformer.

Technical Specifications:
  • Feedstock Flexibility: Light, full-range, and heavy naphtha
  • Contaminant Removal: Sulfur (<1 ppm), nitrogen, diolefins, and oxygenates
  • Pressure/Temperature Range: 20–50 bar, 250–350°C
  • Catalyst Compatibility: CoMo/NiMo or platinum-based catalysts for deeper desulfurization
Integration Benefits:
  • Seamless downstream integration with catalytic reformers
  • Prepares naphtha for octane enhancement and aromatic production
  • Supports stable reforming unit operations, increasing catalyst life
Key Features:
  • Enhanced feedstock conditioning
  • Improved hydrogen utilization efficiency
  • High product purity, critical for petrochemical feedstocks
  • Compact, pre-assembled units reduce on-site construction time

Kerosene/Jet Fuel Hydrotreater Modules

Our Kerosene and Jet Fuel Hydrotreater Modules are specialized units that improve smoke point and reduce sulfur and aromatics, producing aviation-grade fuels that meet global aviation authority standards.

Technical Specifications:
  • Target Feedstocks: Kerosene, aviation turbine fuel (ATF), straight-run fractions
  • Operating Window: 30–60 bar, 280–350°C
  • Reactor Design: Optimized for aromatic saturation and smoke point enhancement
Compliance & Certification:
  • Adherence to ASTM D1655, DEF STAN 91-91, and ICAO emission standards
  • Suitable for both civil and military aviation fuel production
Key Features:
  • Excellent aromatic reduction to boost combustion characteristics
  • Enhanced thermal stability and freezing point control
  • Preconfigured modules with integrated filtration and polishing units
  • Field-proven performance in airport refineries and remote aviation hubs

Tail Gas/Off-Gas Hydrotreater Modules

The Tail Gas and Off-Gas Hydrotreater Modules from Crystal Industrial are designed to treat off-gas streams rich in sulfur and other residuals, typically from Claus sulfur recovery units (SRUs) or FCC off-gas systems.

Technical Specifications:
  • Feedstock Characteristics: Tail gas from SRU, sour water stripper off-gas, FCC dry gas
  • Operating Range: 20–50 bar, 250–370°C
  • Catalyst Systems: CoMo or custom catalyst systems with high sulfur capacity
  • Gas-Liquid Integration: Suitable for combined gas-liquid phase reactions
Environmental Compliance:
  • Meets stringent SOx and NOx emission regulations
  • Supports US EPA MACT, Euro standards, and local pollution control board norms
Key Features:
  • Integrated heat exchangers for energy recovery
  • Effective hydrogenation of sulfur species like COS, CS2, and H2S
  • Modular units for SRU tail gas treating or standalone emission polishing
  • Easy integration with existing refinery tail gas units for emissions control

Custom/Specialty Hydrotreater Modules

At Crystal Industrial, we understand that no two feedstocks are the same. Our Custom and Specialty Hydrotreater Modules are designed to address unique challenges where off-the-shelf solutions fall short. Whether it’s purifying transformer oil, upgrading lubricants, or processing renewable feedstocks, our team delivers fit-for-purpose solutions.

Bespoke Capabilities:
  • Handling of complex and variable feedstocks: UCO, tallow, specialty distillates
  • Reactor internals optimized for flow dynamics and pressure drops
  • Batch and continuous operation modes depending on product requirements
Consultative Engineering:
  • Feasibility and simulation studies
  • Custom P&ID and 3D design modeling
  • Pilot module testing prior to full-scale deployment
Key Applications:
  • Renewable diesel and SAF (Sustainable Aviation Fuel) production
  • Lubricant base oil purification
  • Electrical insulating oil hydrotreatment
  • Transformer and white oil upgrading
Why Choose Crystal for Specialty Modules:
  • Collaborative engineering approach
  • Integration with upstream/downstream units (reactors, separators, blending systems)
  • Proven experience across R&D setups, pilot plants, and full-scale custom builds

Cross-Cutting Advantages Across All Product Lines

Regardless of the application, all Crystal Industrial hydrotreater modules share several strategic advantages:

1. Modular Flexibility

Our pre-engineered skids can be rapidly deployed, scaled, or relocated, offering an alternative to lengthy stick-built construction.

2. Global Standards Compliance

All modules are built in accordance with ASME, API, ISO, and client-specific documentation standards.

3. Digitally Enabled

Integrated with PLC/DCS-based control systems, our modules allow for remote monitoring, predictive maintenance, and performance optimization.

4. Cost & Time Efficiency

Factory-built modules reduce construction timelines by up to 50% and labor costs by up to 60%, without compromising quality.

5. Sustainability Focus

Lower emissions, energy integration, and the ability to process renewable feedstocks position our plants at the forefront of low-carbon refining.

Partner with Crystal Industrial

From standard product modules to complex, one-of-a-kind solutions, Crystal Industrial delivers hydrotreater plants that perform with precision, reliability, and consistency. We back our product lines with global delivery experience, best-in-class documentation, and unmatched customer support.

To learn more about any of the modular plant lines above, or to request a custom consultation, contact us today.

Crystal Industrial Syndicate – Built in India, Trusted Worldwide.