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ITS » Master Theses » Kimia - S2 Posted by tondoindra@gmail.com at 08/12/2011 14:58:56 • 188 Views
AKTIVITAS KATALITIK KATALIS CUO/TS-1 PADA REAKSI HIDROKSILASI BENZENA
CATALYTIC ACTIVITY CuO/TS-1 CATALYST ON BENZENE HYDROXYLATION REACTION
Created by :
Widiarti, Nuni ( 1409201001 )
| Subject: | Katalisis | | Alt. Subject : | Catalysts | | Keyword: | Hidroksilasi benzena TS-1 CuO/TS-1 asam asetat |
[ Description ]
Telah dilakukan penelitian reaksi hidroksilasi benzena dengan oksidan H2O2 menggunakan katalis CuO/TS-1. Mula-mula TS-1 disintesis dengan proses hidrotemal, dilanjutkan proses impregnasi TS-1 dengan prekursor Cu(NO)2.3H2O menghasilkan katalis CuO/TS-1. Katalis TS-1 dan CuO/TS-1 hasil sintesis dikarakterisasi dengan menggunakan XRD, FTIR, FTIR Piridin, adsorpsi-desorpsi N2 dan aktivitas katalitiknya diuji pada reaksi hidroksilasi benzena menjadi fenol. Hasil reaksi yang diperoleh dianalisis menggunakan Kromatografi Gas (KG) untuk menentukan produk reaksinya.Hasil karakterisasi dengan difraksi sinar-X dan FTIR menunjukkan bahwa kedua katalis hasil sintesis merupakan katalis berstruktur orthorombik dengan tipe MFI. Adanya CuO pada TS-1 dapat meningkatkan jumlah sisi asam Lewis pada katalis. Aktivitas katalitik katalis 1%CuO/TS-1 lebih tinggi dari ZSM-5, CuO, dan TS-1, yang menunjukkan adanya kontribusi ion Cu2+ dan Ti4+ sebagai sisi aktif pada katalis CuO/TS-1. Akan tetapi, penambahan oksida CuO diatas 2% mengakibatkan terbentuknya agregasi CuO pada permukaan TS-1 dan pemblokiran sisi aktif katalis oleh oksida CuO sehingga menurunkan luas permukaan dan aktivitas katalitik katalis. Kondisi optimum reaksi hidroksilasi benzena dengan katalis 1%CuO/TS-1 dan oksidan H2O2 teramati pada suhu reaksi 70°C, waktu reaksi 2 jam dan pelarut asam asetat dengan produk fenol 3,53 mmol dan selektivitas terhadap fenol 75,5%.
Alt. Description
Hydroxylation of benzene with H2O2 as oxidant by use of CuO/TS-1 catalysts has been studied. TS-1 was initially synthesized by hydrothermal process, followed by impregnation of Cu(NO)2.3H2O precursor on TS-1 to produce CuO/TS-1 catalysts. The resulting catalysts were characterized by use of XRD, FTIR, FTIR pyridine and N2 adsorption-desorption. The catalytic activity of the catalysts was tested on benzene to phenol hydroxylation reaction and the reaction products were analyzed using gas chromatography (GC). The results from XRD and FTIR showed that both of TS-1 and CuO/TS-1 catalysts have an orthorombic structure with MFI type. A present of CuO on TS-1 have increased the amount of Lewis acid sites of the catalysts. Catalytic activity of 1%CuO/TS-1 catalyst was higher than that of ZSM-5, CuO, and TS-1, which indicated the contribution of Cu2+ and Ti4+ ions as active sites of the CuO/TS-1 catalysts. As the amount of CuO loaded on TS-1 was increased for more the 2%, however, blockage of the TS-1 active sites with CuO aggregates was observed, resulting in a decrease in the surface area and catalytic activity of the catalysts. The best condition of the benzene hydroxylation reaction with H2O2 using 1%CuO/TS-1 catalyst was at the reaction temperature of 70°C, 2 hour reaction time and acetic acid as solvent with phenol product reached 3,53 mmol with selectivity to phenols of 75,5%.
| Contributor | : |
- Dr. Didik Prasetyoko, M.Sc
- Dra. Ratna Ediati, M.S, Ph.D
| | Date Create | : | 29/07/2011 | | Type | : | Text | | Format | : | pdf | | Language | : | Indonesian | | Identifier | : | ITS-Master-3100011043730 | | Collection ID | : | 3100011043730 | | Call Number | : | RTKi 541.395 Wid a |
Source : Master Theses,Chemistry,RTKi 541.395 Wid a,2011
Coverage : ITS Community
Rights : Copyright @2011 by ITS Library. This publication is protected by copyright and per obtained from the ITS Library prior to any prohibited reproduction, storage in a re transmission in any form or by any means, electronic, mechanical, photocopying, reco For information regarding permission(s), write to ITS Library
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