How does molecular sieve dry pyrolysis gas?

molecular sieve is a kind of aluminosilicate, which is mainly composed of silicon and aluminum connected by oxygen bridge. There are many pores with uniform pore size and holes with large internal surface area in the structure. In addition, it also contains metal ions with lower electricity price and larger ion radius and combined water. Because water molecules are continuously lost after heating, but the crystal skeleton structure remains unchanged, many cavities with the same size are formed, and the cavities are connected with many micropores with the same diameter. Substances smaller than the pore diameter are adsorbed in the cavities, while molecules larger than the pore are excluded, so that molecules with different sizes and shapes are separated until the molecules are screened, so it is called molecular sieve. It is mainly used for deep drying, separation and purification of various gases and liquids, catalyst carrier, etc., so it is widely used in oil refining, petrochemical industry, chemical industry, metallurgy, electronics, national defense industry, etc., and is also widely used in medicine, light industry, agriculture, environmental protection and many other aspects.

3A molecular sieve is mainly used for drying petroleum cracking gas, olefin, refinery gas and oilfield gas, and it is a desiccant for chemical industry, medicine, insulating glass and other industries.

chemical formula: 2/3k2o.1/3ka22o.ai2o3.2sio2.9/2h2o

main uses: 1. drying of liquid (such as ethanol)

2. drying of air in insulating glass

3. drying of nitrogen and hydrogen mixed gas

4. drying of refrigerant.

chemical formula: Na2O Al2O3 2sio2.9/2h2o

main uses: 1. deep drying of gases and liquids such as air, natural gas, alkanes and refrigerants;

2. Preparation and purification of argon;

3. Static drying of electronic components and materials susceptible to moisture deterioration;

4. Used as dehydrating agent in paints, polyesters, dyes and coatings.

5A molecular sieve

chemical formula: 3/4cao.1/4Na2O.Al2O3.2sio2.9/2h2o

main uses: 1. natural gas drying, desulfurization and carbon dioxide removal;

2. separating nitrogen from oxygen and nitrogen from hydrogen to produce oxygen, nitrogen and hydrogen;

3. petroleum dewaxing, separation of normal hydrocarbons from branched hydrocarbons and cyclic hydrocarbons.

(renewable)

13XAPG molecular sieve

is mainly used to purify the feed gas of large and medium-sized air separation units.

The series of molecular sieves specially used for insulating glass can absorb moisture and residual organic matter in insulating glass at the same time, so that insulating glass remains bright and transparent even at a very low temperature, which fully reduces the strong internal and external pressure difference borne by insulating glass due to seasonal and day-night temperature difference changes, completely solves the problem of distortion and breakage caused by ordinary insulating glass desiccant's easy expansion or contraction, and fully prolongs the service life of insulating glass.

molecular sieve activating powder series is a dehydrated molecular sieve. It has certain dispersibility and fast adsorption speed. Mainly used as additives for coatings, paints, resins and related adhesives.

regeneration of molecular sieve

in order to obtain good operating performance and as long as possible life, the sieve must be regenerated after being used for a certain period of time. The correctly regenerated molecular sieve, like fresh molecular sieve, has very low attenuation and aging of adsorption and mechanical properties. There are two basic methods to regenerate molecular sieve:

1) Changing the temperature, that is, "changing the temperature". It removes the adsorbed substances by heating the molecular sieve. In industry, it is usually heated by preheated regenerated gas, and the molecular sieve is purged to about 2, and the desorbed adsorbate is taken away.

2) change the relative pressure, that is, "variable pressure". Generally used in gas phase adsorption process. The basic method is to keep the temperature of the adsorbent constant, and remove the adsorbate by reducing the pressure and blowing back with inert gas.

regeneration is usually carried out in the opposite direction to adsorption, which can make most of the adsorbate contained at the inlet of the adsorption bed not pass through the whole bed, and some molecular sieves do not contact with hot and humid gases, thus improving the service life of molecular sieves. Regenerated gas should be as dry as possible, otherwise the adsorption efficiency will be affected/ppp4.htm.