Molecular Sieve
Molecular Sieve
SCST-701-13X molecular sieve is a sodium-type aluminosilicate, which can adsorb molecules with a large critical diameter. It is mainly used for the drying and purification of gases, and the purification of feed gas of air separation units, and can effectively absorb water, CO2, H2S and other substances to avoid tower freezing in equipment and plants. It is used for the drying of pharmaceuticals and air compression systems, and can also be used for the desulfurization of petroleum gas and natural gas.
Physical and Chemical Properties
|
Property |
Sphere |
Strip |
||
|
Size, mm |
1.6~2.5 |
3~5 |
1.6 |
3.2 |
|
Strength, N/grain |
≥30 |
≥60 |
≥30 |
≥60 |
|
Static Water Adsorption, % (RH50%, 25°C) |
≥25 |
≥25 |
≥26 |
≥26 |
|
Static CO2 Adsorption, % |
≥17 |
≥17 |
≥17 |
≥17 |
Regeneration
1) Water removal: depending on the pressure, temperature and water content of the regenerated gas. Under normal circumstances, the 200~350℃ dry gas passes through the molecular sieve bed at 0.03~ 0.05MPa pressure for 3~4h, to ensure that the outlet temperature is 110~180℃, and then it is cooled.
2) Organics removal: replace organic matter with steam and then remove water.
Applications
1) Drying and purification of industrial gases; used as a carrier;
2) Purification of feed gas for air separation units (removal of H2O and CO2 at the same time);
3) Desulfurization of liquid hydrocarbons and natural petroleum gas (removal of hydrogen sulfide and mercaptans).
Natural gas to hydrogen technology
After pre-treatment, natural gas or other light hydrocarbon raw materials are mixed with steam and enter a special conversion furnace. Under the action of nickel catalyst SCST-20X, steam reforming reaction occurs to generate conversion gas containing H2, CO2, CO and other components. After recovering heat from the conversion gas, the conversion gas containing CO2 and H2 is obtained through water vapor shift reaction, and then purified by PSA to obtain high-purity H2. The PSA tail gas is returned to the conversion furnace for combustion and heat recovery.
Conventional Methanol-to-Hydrogen Technology
1. Methanol-to-hydrogen technology has certain advantages among various hydrogen production technologies due to its wide availability of raw materials, technological maturity, ease of operation, economic efficiency, and environmental friendliness.
2. Process Flow: Methanol and steam, under specific pressure and temperature conditions, pass through a methanol-steam reforming catalyst bed to generate reformed gas, whose main products are carbon dioxide and hydrogen. This reformed gas is then subjected to pressure swing adsorption to obtain product hydrogen with a purity of 99.0%~99.999%.
Hot Products
Fe-Mn Bifunctional Desulfurizer
Pre-reforming Catalyst
High Temperature CO Shift Catalyst
Methanation Catalyst
Methanol Steam Reforming Catalyst
High Temperature Methanol Steam Reforming Catalyst
Low-pressure Methanol Synthesis Catalyst
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