Honey comb matrix comprising macro porous desiccant, process and use thereof
Macroporous desiccant based honeycomb matrix comprising the macroporous desiccant synthesized “in-situ”, said desiccant having a differential water adsorption. Process for the “in-situ” preparation of the macroporous desiccant based honeycomb matrix comprising the steps of soaking honeycomb substrate impregnated with water glass, in aqueous metal salt(s) solution or acid solution, or combination thereof, till such time the hydrogel honeycomb matrix is obtained and thermally activating said hydrogel honeycomb matrix to produce macroporous desiccant based honeycomb matrix.
1. The macroporous desiccant based honeycomb matrix comprising the macroporous desiccant synthesized “in-situ”, said desiccant having a differential water adsorption of more than 50% or at least 40% at relative humidities of 50% and 100%, a pore diameter in the range of 40 to about 200 Å and pore volume from about 0.40 to about 0.80 gm/cc.
2. The macroporous desiccant based honeycomb matrix as claimed in claim 1 , wherein said water adsorption is greater than 60% at a relative humidity of 100%.
3. The macroporous desiccant based honeycomb matrix as claimed in claim 1 , wherein said desiccant exhibits a type II, type III and type IV isotherm.
4. The macroporous desiccant based honeycomb matrix as claimed in claim 1 , wherein said matrix comprises a substrate.
5. The macroporous desiccant based honeycomb matrix as claimed in claim 4 , wherein said substrate is inorganic, organic substance or combination thereof.
6. The macroporous desiccant based honeycomb matrix as claimed in claim 5 , wherein said substance is a fibre or pulp.