Solid catalysts are of great advantages in alkylation reaction due to heterogenous reaction which makes separation of catalysts very easy and environment friendly. Here, sulfated and borate zirconia catalysts are used to search for ortho-xylene with Toluene & methanol. To find a new path to get o-xylene, catalysts surface was studied and a new mesoporous borate zirconia catalyst was prepared. Mesoporous Borate Zirconia had showed a very efficient path to manufature o-xylene.
Modification & Application of Borate Zirconia Catalyst
1. MODIFICATION & APPLICATION OF BORATE ZIRCONIA CATALYST Ranjeet Kumar 04CH6022 Under the guidance of Dr. Sonali Sengupta Department of Chemical engineering IIT Kharagpur
23. Preparation of Mesoporous BZ In this case I = Zirconium Oxychloride + Water + Borax S = SLS / TTBr + Water Steps of preparation: - a) preparation of solution b) aging c) filtration d) washing e) calcinations/extraction More the hours of aging better is the catalyst
24. Trials for standardizing the preparation method Trial 1:- 86.70 1500 0.05 0.3 1 NA 1250 0.05 0.3 1 83.26 1000 0.05 0.3 1 NA 750 0.05 0.3 1 75.53 500 0.05 0.3 1 SA m 2 /g H 2 O B : SLS : Zr :
25. Trial 2 :- Since the range of surface area was not so wide so Zr : Sufactant : B : H 2 O :: 1 : 0.3 : 0.05 : 1000 was taken as base for further trials. 85.53 1500 0.05 0.2 1 NA 1250 0.05 0.2 1 NA 1000 0.05 0.2 1 43.80 750 0.05 0.2 1 37.00 500 0.05 0.2 1 SA m 2 /g H 2 O B : SLS : Zr :
31. Adsorption isotherm The adsorption isotherm is type IV IUPAC classification with hysteresis, which Indicate a mesoporous material.
32. Surface area & pore size distribution Apparatus used was – Coulter’s SA3100 for SA & pore size analysis. SMARTSORB-90 for SA M esoporous Microporous SA – 310 m 2 /g 85-115 m 2 /g Pore volume – 0.23 cm 3 /g 0.09-0.12 cm3/g >>> An excellent surface area (310 m2/g) was obtained by using separate solution of S ( Cetrimide ) & I, 72 hr aging, and extraction.
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