|
Article Details :: |
|
|
| Article Name : | | | PHENOL OXIDATION AS A TEST REACTION FOR TI INCORPORATION IN MODIFIED FORMS OF Y- ZEOLITES | | Author Name : | | | K.U.GORE | | Publisher : | | | Ashok Yakkaldevi | | Article Series No. : | | | ROR-306 | | Article : | |  | Author Profile | | Abstract : | | | The Phenol oxidation is considered as a test reaction in confirmation of the frame work incorporation of Ti in the zeolite as per the reported methods.The applications of the zeolites can be changed depending upon the modification of the zeolite without much disturbing its crystallinity.The position of the incorporated active metal inside the zeolite also affects its characteristics.The zeolite-Y is the single largest used zeolite even today in refining and petrochemical industries due to its 3D pore structure. Most of the zeolites are unstable and lose their activity at higher temperature and in hydrothermal conditions. The Synthesized highly crystalline Na-Y zeolite in pure form is obtained ,from Union Carbide Corporation, USA (Linde, SK-40) with Si/Al = 2.4 as a original sample for further modification. It is convert into NH4-Y form by using Ammonium Nitrate solution at 1000C using reflux method and calcined at 5000C,The process were repeated three times to convert it in to highly crystalline frorm of low silica H-Y zeolite. The H-Y zeolite is stabilized by treating carefully under controlled hydrothermal conditions at 550OC for 4h and then gradually cooling at the rate of 2oC/min. carefully to obtain the final product. This high silica H-USY 500, sample was used for insertion of Ti in oxidized form in to the stable H-USY-500 Zeolite and It is modified to Ti –USY-500 zeolite products. The incorporated Ti in the zeolite changes their catalytic activity and selectivity of the products and the reactants. These samples are characterized by XRD, AAS, XRF and NMR techniques etc. For the confirmation of incorporation of Ti at the frame work location of the H-USY zeolite The Phenol oxidation as a test reaction is carried out with the samples prepared. The details of the reaction , are discussed in the present paper. | | Keywords : | | - Synthesized Faujasite Na-Y zeolite.,Synthesized Faujasite Na-Y zeolite.
sulfasalazine arthritis read sulfasalazine (azulfidine) sulfasalazine arthritis read sulfasalazine (azulfidine)
|
|
|
|