Molecular Sieve For Hydrogen Purification – How Are They So Helpful?

Molecular sieves are manufactured crystals which are widely used for separating various molecules present in a liquid or a gaseous solution. The use of molecular sieves is increasing in several industries like petroleum and chemical manufacturing due to the excellent hydrogen purification properties they possess. One of the major reasons why they are now being used in almost all kinds of industries is that they can be reconditioned and reused any number of times. Available in different styles and sizes, molecular sieves have proven to be the best desiccants available in the market. 

Molecular sieves are drying agents that work like a piece of sponge. As soon as they get heated up, they dehydrate and get rid of all the water content. This process doesn’t really cause any damage to the given crystalline structure. It can easily dry out the mixture and even get rid of various molecules that might make the process of hydrogen purification difficult. 

This is an adsorbent which should be kept in a dry place so as to maximize its effects. There are some molecular sieves present in the market which are used for the purpose of removing oxygen from a given packaging unit as well. Oxygen can easily cause big damage to all kinds of food materials and so it should be kept away from the unit that contains food stuff. For this purpose, a molecular sieve desiccant can be used for removing oxygen and keeping dust away. 

Key Benefits of Molecular Sieve for Hydrogen Purification

• Regardless of the industry where these molecular sieves are used, hydrogen purification ranks as their most accomplished feature. They are easily found and are inexpensive in nature too. 

• Due to the increased popularity of these sieves, various companies have started manufacturing high quality molecular sieves for hydrogen purification which can be reused and reconditioned, thereby eliminating wastage on a large scale. 

Various commercial industrial units have incorporated this technology and gained superior results. With the regular usage of molecular sieves for drying up the environment and purifying hydrogen, you can easily save a lot of time and money. However, the quality of sieves which you get into your unit can prove to be the deciding factor when it comes to your product’s quality and therefore, you should only rely on experienced manufacturers in the industry. Molecular sieves are by far the best tools used for hydrogen purification. 

Key Details on Molecular Sieve for Insulated Glass

Molecular sieve for insulated glass adsorption can prove to be a great option for you if you’re willing to make the most out of these desiccants. Molecular sieve adsorbent helps in keeping the glass bright and clean by reducing the moisture level instantly, whenever required. These desiccants can easily keep the glass clean and transparent, even if the temperature is pretty low. This is a major reason why they are widely used in residential and commercial establishments for keeping window panes and doors clean during bad weather conditions.

Molecular sieves for insulated glass can also resolve the issue of any kind of window distortion, which is caused by shrinking and IG inflation under different seasons. These sieves help in prolonging the life of your windows significantly. Due to the increased demand of these adsorbents, several manufacturers have started selling these adsorbents. However, it is crucial for homeowners as well as business owners to decide upon the right product that offers the maximum benefits at the lowest rates.

Key Features of Molecular Sieves

• High moisture adsorption ability
• Stable primary moisture absorption rate
•  Low gas adsorption
• Low dust levels
• Outstanding flow capability along with automatic filling

Why are they used?

A suitable insulated glass unit is made up of two glass panes at least. They are separated by a small

Desiccant for Insulation glass

amount of space, which is filled with air or a certain gas like krypton or argon. During fabrication, some water can be trapped inside this space, which is why it can make the glass look opaque. It can even cause some fogging, which is why these molecular sieves are used in several locations to keep the panes clean.

There are various desiccants available in the market; however, just the synthetic zeolite based desiccants are the only original molecular sieves that guarantee a completely moisture free area. They have extremely high adsorption capability, which helps in safeguarding products against any kind of long-term defects. They have a low density level as well, which is why they are able to keep the moisture level under control. Purchasing high quality molecular sieves can prove to be really helpful as far as keeping the window panes clean and bright is concerned. This is the best possible way through which molecular sieves for insulated glass can protect window glasses. It can be easily concluded that these molecular sieves are the best ways through which the problem of fogging in the winters can be avoided.

Molecular Sieves Powder Coating – What are the Major Applications?

Molecular sieves powder is a desiccated synthetic powder form of 4A and 3A molecular sieves and is used in some special adsorbents applications including petrochemical product purification for increasing strength and creating a pollution free atmosphere. Molecular sieves are a comprehensive sodium silicate and aluminum oxide structure, which permits the adsorption of several molecules on the basis of its polarity and size.

The molecular sieve powder is also used for compounding and formulating applications. It is even helpful in reducing the level of moisture significantly along with a high adsorption capacity. All these adsorbents function using a simple physical procedure, so that no hazardous reactions are formed that could affect the overall production properties. Molecular sieves powder coating for anti-corrosion treatment has also been widely accepted by various industries.

Molecular Seive Powder

Why is molecular sieves powder coating used worldwide?

•  The adsorption procedure is entirely physical; therefore, there are no side effects.
•  High speed of adsorption and high capacity to scavenge water
• Finely divided powder
• Narrow particle size distribution
• Simple to disperse
• High quality
• No foaming in PU systems

Applications of Molecular Sieves Powder Coating 

• 2K- Polyurethane moldings and coatings
• Highly efficient product for metal reactions
• 1K- Polyurethane storage safety
• Metallic pigment storage protection
• Polysulfide and silicone systems
• Carriers for chemicals
• Polymer production processing aid
• Cosmetics additive
• Storage protection additives (hygroscopic goods)
• Additives (flame retardants)
• Powder Coating in several industries including the paint industry
• Polyurethane Systems

 

Why use molecular sieve powder?

Water, even in small quantities, reacts readily with the isocyanate group to form CO2, which creates instability in the system. These sieves are the strongest water scavengers as they absorb water at extremely low concentrations. Besides eliminating foaming or bubbling in the system, the sieve powder also helps in keeping the weathering effects, such as blistering and cracking, away.

Major Applications

  - Flooring                              - Spray Coating  
  - Sealants and Adhesives         - Industrial Coatings
  - Tank and Pipe Coating          - Electrical Parts

Metallic Coatings for Anti-corrosion and Marine Applications
 
Applications

• Paints that contain different metallic compounds, including copper, tin or zinc, require a water-free formulation which is where the molecular sieve powder helps. The molecular sieve powder when added to the formulation ensures that proper stability is maintained during the storage process.
  
• The molecular sieve powder when added to the formulation ensures that proper stability is maintained during the storage process.

Why are molecular sieves powder coatings used here?

• For eliminating hydrogen gas formation

• For extending shelf life

• For eliminating the risk of container bursting and bulging

With so many uses of molecular sieve powder coating evolving over a period of time, it can be easily concluded that this is a technology which is here to stay, especially in the coating and molding industry.

Non Toxic and Highly Absorbents Molecular Sieves

Molecular sieves are said to be those type of desiccants which although has almost same appearance with that of silica gel but has different completely different properties as compared to silica gel. This desiccant is produced synthetically with the help of metal amino silicates. Molecular sieves are absolutely safe to use with the food items as it is absolutely nontoxic but at the same time are highly porous. It appears to have a pinkish color, tiny opaque beads which have several internal cavities, connected with each other with the help of internal window openings.

The other type of desiccant is dehydrated ethanol. Ethanol dehydration means a process where the water molecules or something equivalent to water molecules are removed from the substance. Ethane and water is produced by dehydrating ethanol by heating it over certain temperature with sulfuric acid. The vapors of ethanol can be easily dehydrated by passing any type of heated catalyst, which will produce ethane gas. This process is also called as ethanol drying.

more detail click on this: Ethanol Dehydration Process withMolecular Sieves

Molecular Sieves 3A for All Humidity Problems

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All the windows are of similar diameter. Diameter plays an important role in the working of molecular sieves. Its accurate diameter is the unique identification which differentiates it from the other desiccants. Different types of Molecularsieves are 3A, 4A, 5A, 10A which is also known as 13X. So, if the molecules of the elements have smaller diameter as compared to the window opening of the desiccant, the process of absorption happens otherwise it will not.

As it has high network of pores, Molecular sieves can be said as the ultimate source for absorbing moisture. This feature makes it demanding in the industrial sector. This absorbent is synthetically produced from Zeolite and has innumerable internal cavities which absorbs moisture and locks it inside them. These desiccants can either be used individually or you also have the option to use it in combination with other desiccant, in this way you can get optimal solution. Different types of desiccants have different type of absorbing qualities. In the case of molecular sieves, it has the capacity to absorb moisture or gas up to 20 times of its own weight. Since, it is one of the most effective and aggressive absorbents available in market, it costs a little higher than the other desiccants. This desiccant is used in various organizations like pharmaceutical and medical industry, food and refrigeration industry and also cosmetics and petroleum industry. Apart from this, it is widely used in electronic and computer industry.

Ethanol Dehydration Process with Molecular Sieves

These sieves are made available in the form of beads, pellets and powder foam that can be used for ethanol dehydration, natural gas adsorption and purification process. When we talk about high water adsorption capacity, strong crushing structure, high mass transmission efficiency, these sieves are the best choice. These adsorbents have more than one cyclic process times and more durability involving regeneration features improves more efficiency and longtime adsorption capacity with having more effective then activated alumina and silica gel.

These desiccants have a high adsorption quality. This quality is bought by the intricate network of pores and also empty cavities in which moisture can be absorbed. These sieves are available in various configurations like 3X, 4X, 5X, 10X. The higher the numerical value, the better is the moisture absorbing capacity. Molecular sieve 3a is the potassium based molecules having opening pore size about 3Ao of “A” type crystalline structure and also it cannot absorb any molecules more than its pore size. The chemical name of this desiccant is synthetic sodium potassium or calcium aluminosilicate.

These desiccants find extensive use in various commercial and industrial processes. Molecular sieves are used in dehydration of many kinds of liquids like ethanol. It is also used in the separation and purification of these liquids. Oil purification is another such area where these sieves are used extensively. These are also used in olefin drying. The feed that comes from polymer plant is also dried using molecular sieves. It is also recommended for drying unsaturated hydrocarbons and highly polar compounds such as methanol and ethanol. The molecular sieve 3a structure is particularly effective in dehydrating the inner space of insulating glass windows as well as refrigerant gases. The moisture absorbing property of these sieves is also very effective in dehydration of cracked gas, ethylene, ethyne, propylene, butadiene, natural gas or methane, oxygen remove from air and also the air itself. It is also used in drying N2-H2 mixtures made by cracking of ammonia.

Characteristics & Uses of Molecular Sieves

Molecular sieve is a porous solid, usually a synthetic or a natural zeolite derived from alumina silicates with a different attachments of compounds like sodium, Calcium, Potassium that separates particles of molecular dimension which are defined to its pore diameter openings like 3A,4A,5A,10A. A true Molecular sieves are hydrated metal alumino-silicate compounds with well-defined crystalline structures. 

The silicate and aluminates groupings form three-dimensional crystal lattices surrounding cavities in which the metal ions and the water molecules are loosely held. Channels run through the entire crystal, interconnecting the cavities and terminating at the crystal surface. Upon heating above 200 deg C, the zeolites lose their inbound water content with little or no change in their crystal structure. The dehydrated Molecular sieves can reversibly absorb water or other molecules that are small enough to pass through the channels or pores. The metal ions are also readily replaceable by oterionic units of similar charge and size..

Molecular Sieves

 The sizes of a 4 to 8-mesh sieve is normally used in gas phase applications, while the 8 to 12-mesh type is common in liquid phase applications. The powder forms of the 3A, 4A, 5A and 13X Molecular sieves are suitable for specialized applications. Long known for their drying capacity (even to 90°C), molecular sieves have recently demonstrated utility in synthetic organic procedures, frequently allowing isolation of desired products from condensation reactions that are governed by generally unfavorable equilibria. These synthetic zeolites have been shown to remove water, alcohols (including methanol and ethanol), and HCl from such systems as ketamine and enamine syntheses, ester condensations, and the conversion of unsaturated aldehydes to polyenals.

Molecular sieves are used for drying gases and liquids and for separating molecules on the basis of their sizes and shapes. When two molecules are equally small and can enter the pores, separation is based on the polarity (charge separation) of the molecule, the more polar molecule being preferentially adsorbed.

3A type with potassium base is widely used in commercial dehydration of unsaturated hydrocarbon streams, including cracked gas, propylene, butadiene, acetylene; drying polar liquids such as methanol and ethanol. Adsorption of molecules such as NH3 and H2O from a N2/H2 flow. Considered a general-purpose drying agents in polar and nonpolar media.

Type 4A Molecular Sieve is most preferred for static dehydration in closed liquid or gas systems, e.g., in packaging of drugs, electric components and perishable chemicals; water scavenging in printing and plastics systems and drying saturated hydrocarbon streams. Adsorbed species include SO2, CO2, H2S, C2H4, C2H6, and C3H6. Generally considered a universal drying agent in polar and nonpolar media.

Commercial gas drying, air plant-feed purification (simultaneous H2O and CO2 removal) and liquid hydrocarbon/natural gas sweetening (H2S and mercaptan removal- sweet smell ) which is well taken care by 13X type.

If you plan to remove or separation of normal paraffin’s from branched-chain and cyclic hydrocarbons; removal of H2S, CO2 and mercaptans from natural gas. Molecules adsorbed include nC4H10, nC4H9OH, C3H8 to C22H46, and di-chlorodifluoro-methane (Freon 12®) then the most recommended product is a 5A type. Which is widely accepted.

Aggressive Moisture Control Desiccant – Molecular Sieves

Basically Molecular Sieves are used in industrial or commercial applications; this desiccant is aggressive in nature for absorbing moisture. If this desiccant used in proper quantity, then this is a powerful desiccants can be used in the right order to remove moisture from environment. Some general example of a desiccant would be in electronic items and pharmaceutical products when any drops of moisture harm their circuits.

  

This desiccant has high adsorption quality in their pores and empty hollows where moisture or vapors can be adsorbed. Molecular sieves are accessible in versions such as 3a, 4a, 5a, 10a etc. The higher the numerical value, the better are the adsorption abilities.

Applications of Molecular sieves 3a