Molecular Sieve is the best for Sulfide Removal
Molecular sieve zeolite has a selective adsorption effect. It has a honeycomb structure. The pores in the crystal are interconnected with each other. The volume of the pores accounts for more than 50% of the volume of the zeolite crystal, and the pore size is uniformly fixed, which is equivalent to the size of ordinary molecules. The diameter of the molecular sieve cavity is generally between 6 and 15A; and the pore size is between 3 and 10A; Only those molecules with relatively small diameters can be adsorbed by the molecular sieve through the pores of the zeolite, while molecules with a large configuration cannot be adsorbed by the molecular sieve because they cannot enter the pores of the zeolite. Silica zeolite has a high affinity for polar molecules and unsaturated molecules, and has excellent adsorption performance under very severe conditions such as low partial pressure, low concentration, and high temperature.
Molecular sieve adsorbents have been widely used to remove hydrogen sulfide from gases. As early as 1958, the Linde department of United Carbide Corporation began to accumulate data on the removal of mercaptans and other impurities from natural gas. Alkali metal aluminosilicates can be used to selectively remove hydrogen sulfide and other sulfides from natural gas. The adsorption selectivity of molecular sieves to polar molecules produces a high capacity for sulfides, and the sulfur content of the gas after treatment drops below 0.4ppm (0.53mg / m3). Molecular sieve regeneration uses steam from 200 to 300 ° C (the molecular sieve is stable at 550 ° C or higher), the regeneration is complete and the life is long.
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