How do mol sieves work?
A molecular sieve works by adsorbing gas or liquid molecules that are smaller than the effective diameter of its pores, while excluding those molecules that are larger than the openings. The size of the pores of both Type A and Type X molecular sieves is closely controlled during the manufacturing process.
What is molecular sieve chemistry?
Molecular sieves are crystalline metal aluminosilicates having a threedimensional interconnecting network of silica and alumina tetrahedra. Natural water of hydration is removed from this network by heating to produce uniform cavities which selectively adsorb molecules of a specific size.
How do molecular sieves absorb water?
Molecular sieve is aluminosilicate and absorbs water vapor from the air through its 3D structure. Molecular sieve is a fast-drying agent, with the ability to trap moisture quicker and more aggressively than silica gel.
How do Zeolites Work?
How does Zeolite work? Zeolite is an alkaline mineral that is very porous and has a negative charge. Since most toxins, such as heavy metals, radiation, and pesticides are positively charged, Zeolite is pulled towards toxins like a magnet and sucks them up into its structure.
What is the purpose of a zeolite?
There are three main uses of zeolites in industry: catalysis, gas separation and ion exchange. Catalysis: Zeolites are extremely useful as catalysts for several important reactions involving organic molecules. The most important are cracking, isomerisation and hydrocarbon synthesis.
What is the best desiccant?
Molecular sieve is our preferred choice of desiccant because despite its adsorption capacity by weight, 20-30% by weight, it has the capacity to dry air down to an extremely low PPMv level, <100 ppm (%RH). This process of adsorption is reversible, but much more difficult than it is with Silica Gel.
How do I activate mol sieves?
They can be activated by passing hot dry gas through them. Usually the boiling point of water is sufficient if the gas is supplied very dry like distilled argon or nitrogen for most purposes and distilled neon or helium for extreme cases. A molecular sieve is a material with pores (very small holes) of uniform size.
Why is zeolite suitable for a molecular sieve?
Zeolite molecular sieves are used in industrial applications since more than 60 years, mainly as highly efficient adsorbents for separation processes in gas or liquid phase. Due to new challenges from the market, more specialized, tailor-made types of zeolite molecular sieves are required.
What is the difference between molecular sieve and silica gel?
The key difference between molecular sieve and silica gel is that a molecular sieve is a material containing pores of similar size, whereas silica gel is a substance can be used to prepare a porous material with pores of different sizes.
How do you activate molecular sieves?
Before a scientist can use molecular sieves as a drying agent, she must “activate” them by removing all traces of water and other volatile compounds. Normally, this involves heating the sieves to 300 to 320 degrees Celsius (572 to 608 degrees Fahrenheit) for about 15 hours.
What are zeolites good for?
Zeolites are minerals that contain mainly aluminum and silicon compounds. They are used as drying agents, in detergents, and in water and air purifiers. Zeolites are also marketed as dietary supplements to treat cancer, diarrhea, autism, herpes, and hangover, and to balance pH and remove heavy metals in the body.
Who is the professor of Chemistry for Dummies?
John T. Moore, EdD, is regents professor of Chemistry at Stephen F. Austin State University, where he is also the director of the Teaching Excellence Center. He is the coauthor of Biochemistry For Dummies and Organic Chemistry II For Dummies.
What should be included in a chemistry cheat sheet?
This Cheat Sheet provides some basic formulas, techniques, and tips you can refer to regularly to make solving chemistry problems a breeze (well, maybe not a breeze, but definitely easier). When completing a chemistry calculation, always write the number with the unit.
What are the formulas for solving acid problems?
Following are some handy formulas for solving acid/base problems. The following equation allows you to calculate the hydrogen ion concentration, [H + ], at 25°C if you know the hydroxide ion concentration, [OH – ]; you can also find [OH –] if you know [H + ].