Dry adsorbent

Dry Adsorbent (Desiccant Adsorbent)

High-Capacity, High-Selectivity Dual-Functional Adsorbent for H₂S and Water Removal

Product Overview

Dry Adsorbent is a premium dual-functional adsorbent engineered for simultaneous removal of hydrogen sulfide (H₂S) and water from gas and liquid phase raw materials. Built on a matrix of modified activated alumina with exceptional physical properties and loaded with high-content active components via an advanced rolling ball process, this adsorbent delivers outstanding impurity removal efficiency with high capacity and excellent selectivity.

Designed for demanding industrial purification applications, our Dry Adsorbent excels where both sulfur compounds and moisture must be controlled to ultra-low levels. Its unique combination of large pore size, extensive specific surface area, rapid reaction kinetics, and strong regeneration capability makes it ideal for refining olefin-containing feedstocks and other critical process streams.

Unlike single-function adsorbents requiring separate units for dehydration and desulfurization, our dual-functional Dry Adsorbent handles both impurities in a single adsorption bed, reducing capital costs, simplifying process design, and improving operational efficiency.

Core Advantages

High-Capacity Impurity Removal

Industry-leading adsorption capacity for both H₂S and water enables deeper purification with smaller equipment footprints. High loading of active components distributed across an extensive porous network ensures maximum efficiency throughout service life, extending service cycles and reducing total adsorbent volume required.

Exceptional Selectivity for Olefin-Containing Materials

Critical for processing olefin-containing feedstocks, our Dry Adsorbent preferentially targets H₂S and water molecules rather than co-adsorbing valuable olefins. This minimizes product loss and maximizes yield—essential for ethylene, propylene, and other high-value olefin purification processes.

Rapid Reaction Kinetics

Optimized pore structure and active component distribution enable exceptionally fast adsorption. This supports higher space velocities for increased throughput, reduces required contact time, and maintains high removal efficiency even at elevated flow rates.

Excellent Regeneration Capability

Outstanding regeneration performance maintains adsorption capacity through multiple cycles. This durability extends service life, reduces replacement frequency, lowers adsorbent consumption, and supports sustainable operation with reduced waste generation.

Broad Process Adaptability

Performs reliably across a wide range of operating conditions. Effective in both gas and liquid phase applications, operates efficiently across broad temperature and pressure ranges, tolerates moderate feed composition variations, and is compatible with standard regeneration procedures.

Technical Highlights

Modified Activated Alumina Matrix

Our Dry Adsorbent utilizes a specially modified activated alumina matrix with exceptional physical properties ideal for dual-function adsorption.

• Enhanced Mechanical Strength: Excellent crush strength and attrition resistance ensure structural integrity during loading, operation, and regeneration, preventing fine particle generation and pressure drop issues.

• Thermal Stability: Maintains structural integrity and surface properties through repeated thermal cycling between adsorption and regeneration temperatures.

• Controllable Porosity: Precise control over pore structure creates optimal balance between pore volume, pore size distribution, and specific surface area—the foundation for simultaneous H₂S and water removal.

• Chemical & Hydrothermal Stability: Chemically stable in the presence of typical process contaminants and regeneration media, resisting hydrothermal degradation that can cause structural collapse in conventional adsorbents.

High-Content Active Components

Impregnated with a high loading of active components uniformly distributed throughout the porous alumina structure, critical for achieving exceptional H₂S removal capacity.

• Increased Sulfur Capacity: More active sites per unit volume translate directly to higher H₂S adsorption capacity, enabling longer service cycles and reducing regeneration frequency.

• Uniform Distribution & Dispersion: Evenly distributed throughout the entire bead structure with excellent dispersion, ensuring each active site remains accessible.

• Strong Bonding: Chemically bonded to the alumina surface, preventing leaching or migration during operation and regeneration for consistent long-term performance.

Rolling Ball Process

Manufactured using a sophisticated rolling ball process producing uniformly spherical beads with controlled properties.

• Uniform Spherical Shape: Highly uniform beads with narrow particle size distribution ensure consistent bed packing, minimal channeling, and uniform flow distribution.

• Controlled Bulk Density: Precise control over bulk density ensures optimal bed loading and consistent pressure drop characteristics.

• Internal Structure Control: Gradual material buildup enables uniform internal structure with well-controlled porosity, unlike extrusion methods that can create structural anisotropies.

• Low Attrition: Smooth spherical surfaces exhibit lower attrition rates during handling and operation, reducing dust formation and maintaining bed integrity.

Working Principle

Our Dry Adsorbent operates through a combined physical and chemical adsorption mechanism that efficiently removes both H₂S and water from process streams.

Water Removal: Water molecules are removed through physical adsorption on the extensive surface area of the modified activated alumina matrix. The polar nature of the alumina surface provides strong attractive forces for water molecules, while large pore volume accommodates significant moisture loading.

H₂S Removal: Hydrogen sulfide removal occurs through chemisorption onto high-content active components distributed throughout the porous structure. When H₂S molecules encounter active sites, they form stable sulfide or polysulfide compounds, effectively removing them from the process stream.

Synergistic Operation: The key advantage lies in the ability to simultaneously perform both functions efficiently. The pore structure is engineered to allow both water and H₂S molecules access to their respective adsorption sites without mutual interference, eliminating the need for separate dehydration and desulfurization units.

Key Performance Features

Large Pore Size + Large Specific Surface Area: Synergistic Performance

The combination of large pore size and extensive specific surface area is a defining characteristic of our Dry Adsorbent, and their synergistic interaction is crucial for effective H₂S and water removal.

Large pores reduce diffusion resistance, allowing target molecules to penetrate deeper into the adsorbent bead more rapidly—particularly important for H₂S molecules needing to reach internally distributed active components. Larger pores also accommodate active component loading while maintaining accessibility, are less susceptible to blockage by reaction products, and facilitate liquid phase applications.

Large specific surface area provides more sites for both physical adsorption of water and chemical adsorption of H₂S, directly translating to higher adsorption capacity. It also allows active components to be dispersed more thinly and uniformly, maximizing accessible active sites.

A common challenge in adsorbent design is the trade-off between pore size and surface area—increasing one often decreases the other. Our Dry Adsorbent achieves the optimal balance: large pores providing easy interior access, combined with extensive surface area within those pores maximizing adsorption capacity.

High Selectivity: Critical for Olefin-Containing Materials

High selectivity means the adsorbent preferentially adsorbs target impurities (H₂S and H₂O) while leaving valuable product components (olefins) in the process stream. This is particularly critical for olefin processing.

Olefins such as ethylene and propylene are high-value products. Co-adsorption represents direct product loss and yield reduction. In polymerization processes, even minor changes in olefin feed composition can affect polymer properties.

High selectivity also simplifies regeneration by eliminating the need to strip adsorbed hydrocarbons, and ensures full adsorption capacity is dedicated to removing actual impurities rather than valuable products.

Regeneration Capability: Lowering Total Cost of Ownership

The strong regeneration capability of our Dry Adsorbent delivers tangible economic and operational benefits:

• Extended Service Life: Maintains performance through multiple regeneration cycles, reducing replacement frequency and cost.

• Lower Operating Costs: Regeneration is more cost-effective than replacement, significantly reducing cost per operating cycle compared to disposable adsorbents.

• Reduced Waste Generation: Longer service life means less spent adsorbent requiring disposal, reducing both waste handling costs and environmental impact.

• Consistent Performance & Flexibility: Maintains consistent performance over time, reducing breakthrough risk, and provides operational flexibility to adjust cycle lengths based on production requirements.

Rapid Reaction: Industrial Processing Efficiency

Rapid reaction kinetics have important implications for industrial process design and operation.

Faster kinetics mean less contact time is required for effective impurity removal, allowing operation at higher space velocities and increasing throughput for existing equipment. For new installations, faster kinetics enable smaller reactor vessels while maintaining purification performance, reducing capital investment and plant footprint.

Rapid mass transfer ensures adsorption occurs efficiently at the bed inlet zone, with the mass transfer zone remaining relatively short. This means more of the bed is available for adsorption capacity utilization.

Application Areas

• Olefin Processing & Purification: High selectivity makes it ideal for purifying ethylene, propylene, and other olefin streams where co-adsorption of valuable product components must be minimized.

• Natural Gas Processing: Provides simultaneous dehydration and desulfurization in a single unit, simplifying processing train design and reducing equipment costs.

• Petroleum Refining: Treats various hydrocarbon streams including naphtha, LPG, and intermediate products, reducing the need for separate treatment units.

• Liquid Hydrocarbon Purification: Robust pore structure and mechanical strength make it suitable for liquid phase applications including gasoline and diesel streams.

• Chemical Manufacturing: Delivers deep purification to protect sensitive catalysts and ensure product quality in processes requiring ultra-pure feedstocks.

• Industrial Gas Production: Removes water and sulfur contaminants affecting product quality or damaging equipment in air separation and industrial gas manufacturing.

Technical Parameters

• Base Material: Modified activated alumina with excellent physical properties

• Active Components: High content of uniformly dispersed active sulfur-selective components

• Manufacturing Process: Advanced rolling ball process for uniform spherical beads

• Key Functions: Simultaneous H₂S removal and water dehydration

• Pore Structure: Optimized large pore size with extensive specific surface area

• Adsorption Capacity: High capacity for both H₂S and H₂O

• Selectivity: High selectivity for impurities over hydrocarbon components

• Regeneration: Excellent thermal regeneration capability

• Phase Compatibility: Effective in both gas and liquid phase applications

• Mechanical Properties: High crush strength and attrition resistance

• Particle Shape: Uniform spherical beads with narrow size distribution

• Thermal Stability: Excellent thermal and hydrothermal stability

Specific numerical parameters available upon request. Contact our technical team for specifications tailored to your application.

Usage & Regeneration Guidelines

Operating Recommendations

For best performance, ensure proper bed loading with uniform packing to minimize channeling, use appropriate support materials and flow distribution systems, operate within recommended temperature and pressure ranges, and monitor bed performance for early detection of breakthrough conditions.

Regeneration Procedure

The Dry Adsorbent can be effectively regenerated using standard thermal regeneration techniques:

1. Purge: Displace process fluids from the bed using an inert or non-reactive gas

1. Heating: Gradually raise bed temperature to regeneration temperature using heated purge gas

1. Hold: Maintain regeneration temperature for sufficient time to complete desorption

1. Cooling: Gradually cool the bed to adsorption temperature before returning to service

Best Practices: Use dry, clean regeneration gas; ensure adequate temperature and time for complete regeneration; control heating and cooling rates to minimize thermal stress; monitor effluent to determine completion.

Service Life & Handling

With proper operation and regeneration, our Dry Adsorbent provides extended service life. Store in original packaging in a dry, cool environment, protect from moisture and contamination before use, handle carefully to avoid bead damage, and follow safety procedures for loading and unloading.

Why Choose Our Dry Adsorbent?

When your process demands reliable removal of both H₂S and water from valuable feedstocks, our Dry Adsorbent delivers the performance, selectivity, and durability needed to optimize your operation. Its unique combination of modified activated alumina matrix, high-content active components, and precision manufacturing drives operational efficiency and reduces total cost of ownership.

Exceptional selectivity protects product yield while achieving deep purification, and strong regeneration capability means lower operating costs and less waste.

Contact our technical team to discuss your application and discover how our Dry Adsorbent can improve efficiency, reduce costs, and enhance product quality.