Wholesale Chemical Catalyst Desiccant Absorbent 5A Zeolite Molecular Sieve

Product Description

Product Description

Molecular Sieves: Key Principles

Molecular Sieve 3A is a synthetic zeolite with a pore size of approximately 3 angstroms (0.3 nm), primarily composed of potassium-exchanged aluminosilicate

Structure & Function

Synthetic aluminosilicates (zeolites) with uniform micropores arranged in a cubic lattice.
Selective adsorption based on molecular size: Smaller molecules enter pores and are trapped, while larger ones are excluded—hence the "sieve" analogy.
Pore Size Classification

Type 3A (3 A), 4A (4 A), 5A (5 A), and 13X (10 A) are common, each targeting specific molecules (e.g., 3A for water, 4A for CO₂).
Mechanism

Adsorption occurs via van der Waals forces and electrostatic interactions within pores.
Regenerable by heating (~200–350°C) to release trapped molecules.
Applications

Gas/Liquid Drying: E.g., dehydrating ethanol or natural gas.
Separation: Isomer purification (e.g., separating n-paraffins from branched chains).
Catalysis: Used as supports in petrochemical reactions.

Specification

Name	Unit	Molecular Sieve
shape	-	strip type		ball
diameter	mm	1.5-1.7	3.0-3.3	1.7-2.5	3.0-5.0
size ratio up to grade	%	≥98	≥98	≥96	≥96
bulk density	g/ml	≥0.60	≥0.60	≥0.60	≥0.60
wear ratio	%	≤0.20	≤0.25	≤0.20	≤0.20
crushing strength	N	≥45/cm	≥60/cm	≥45/p	≥45/p
static H2O adsorption	%	≥20	≥20	≥20	≥20
water content	%	≤1.5	≤1.5	≤1.5	≤1.5

Adsorption Mechanism

Size Exclusion: Molecules smaller than pore size (e.g., H2O: 2.6 Å) enter and adsorb; larger ones (e.g., CH4: 3.8 Å) are blocked.
Surface Interactions: Polar molecules (e.g., water, NH3) bind strongly via hydrogen bonding and electrostatic forces.
Thermodynamics: Exothermic process; adsorption capacity decreases with temperature.

Applications

1. Polarity & Adsorption Mechanism
Polar Cavity: The aluminosilicate framework creates an electrostatic field within pores due to unsatisfied charges (from Al³⁺ substitution in SiO₄ tetrahedra).
Interactions:Polar Molecules (e.g., H₂O, CO₂, H₂S): Bind via hydrogen bonding or dipole-cation attraction (e.g., H₂O → K⁺ in 3A sieves).
Polarizable Molecules (e.g., CO₂): Induced dipoles form transient bonds with lattice cations (e.g., Na⁺ in 13X sieves).
Selectivity: Smaller polar molecules (kinetic diameter ≤ pore size) are preferentially adsorbed over nonpolar ones (e.g., CH₄).
2. Role in Desulfurization
Target Molecules:H₂S (2.6 Å): Strongly adsorbed due to polarity and small size (fits even in 3A sieves).
COS (3.2 Å): Captured by larger-pore sieves (e.g., 4A or 5A).
Competitive Adsorption:H₂O vs. H₂S: Water typically dominates adsorption sites, requiring pre-drying of gas streams to optimize H₂S removal.
CO₂ Interference: CO₂ (3.3 Å) competes with sulfur species in 4A/13X sieves; selective formulations (e.g., metal-doped sieves) mitigate this.

Company Profile

Pingxiang Rongjian Environmental Protection Chemical Packing Co., Ltd.

Innovative Solutions for Environmental & Industrial Applications
Headquarters: Xiangdong District Industrial Park, Pingxiang City, Jiangxi Province, China
 
Core Capabilities
 Advanced Manufacturing: Custom-designed towers and systems in ceramic, metal, and plastic materials.
Comprehensive Product Portfolio: 200+ specifications including:
• Ceramic/metal/plastic packing materials
• Molecular sieves & activated alumina
• Catalysts & petrochemical additives
• Activated carbon & eco-friendly filtration media
Turnkey Services: Full-scale pollution control and wastewater treatment projects.
Corporate Strengths
  ISO 9001 Certified - Guaranteed quality management system compliance.
 300+ Workforce - Including 100+ specialized engineers and technicians.
30-Acre Production Base - Integrated R&D and manufacturing facilities.
 
Awards & Innovations
 National Science & Technology Achievement Award
Provincial Gold Medal & Famous Brand Product
17 Patented Technologies - Protecting proprietary advancements.

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