Dear All,
I am trying for procurement of silica gel with following specs.
Service- for drying instrument air @ 7 Bar.
Specifications for Silica Gel Silica Gel charge Conforming to IS3401:1970 Quantity required -1500 Kg Shape- Large Pores granular silica gel. Appearance- Opaque. Size- 2.7 to 7.00 MM Tolerance- +/- 5% Bulk Density Kg/M3 (Dried at 150 DEG C)- 400-500 Moisture Absorption capacity @ 25DEG C & 100 % RH at EQ % W/W 70 (MIN) FREE MOISTURE Content (Determined at 120 DEg C.)- Not more than 4 % BY WT. Loss on Ignition % (Over 150DEG C) 4 (+/- 1) Mechanical Strengtth % 86 (MIN) CHLORIDE AS NaCL % 0.05 SULPHATE AS NA2SO4 % 0.25
However a vender says he has silica gel with BD of 500-650 kg/m3 & adsorption capacity of 50 % min
My question is
1. How BD affects adsorption capacity & surface area?
2. is it okay if I accept silica gel of 500-650 kg/M3 BD inplace of current spcs mentoned above ?
Any information regarding silica gel, its various properties is most welcome.
Thanks for your time...