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SAPO-34 Zeolite,Zeolite SAPO-34,SAPO-34 Molecular Sieve
SiO2/Al2O3 Mole Ratio: 22
Na2O Weight %: 0.05
SAPO-34 molecular sieve made PO2 +, A1O2-, SiO2 tetrahedra interconnected three kinds made with spheroidal cage oxygen-membered ring, round or wrinkled shaped structure, the diameter of the orifice is maintained at between 0.43-0.50nm. The molecular sieve pore volume 1.42cm3 / g, spatial symmetry group R3m, belongs to trigonal system has a structure similar to chabazite.
SAPO-34 molecular sieve has excellent thermal stability and hydrothermal stability. SAPO-34 molecular sieve having an excellent hydrothermal stability of the sample before and after the removal of the templating agent TGA results showed burning templating agent does not cause damage to the skeletal structure. At 800 ℃ and 100% steam for SAPO-34 subjected to hydrothermal treatment for 2 hours the sample XRD intensity change is not obvious. Removal of the template process can cause SAPO-34 molecular sieve unit cell contraction, if the adsorption of water at room temperature will result in a molecular sieve Si-OH-Al bond rupture, the loss of some degree of crystallinity and pore structure. Short-term (twelve days) within for drying, the degree of crystallinity and pore structure will be fully restored.