Abstract:

The specific surface area and pore size distribution of the hydrothermally synthesized 13X zeolite molecular sieves from calcined potassium feldspar powder from 95 ℃ to 100 ℃ were experimentally investigated in this paper.The results showed that the specific surface area of the synthetic 13X zeolite molecular sieves changed from 747.40 to 621.50 m²/g.The total volumes changed from 0.344,70 to 0.393,70 cm³/g.The micro-pore volume ratio，the pore size being less than 2.5 nm of the 13X zeolites，highly reached the range from 81.33% to 84.70% in small and medium scale of experimental samples of SXZ-10g and SXZ-1kg；while the micropore volume ratios of extend scale of experimental samples of SXZ-10kg were from 67.90% to 67.98%.The micro-pore volume was an important factor of high specific surface area and high adsorption capability of 13X zeolite molecular sieves.

Key words: 13X zeolite molecular sieve, specific surface area, pore size distribution