SINTESIS DAN KARAKTERISASI KATALIS Mg ZnxFOH SERTA ...
Transcript of SINTESIS DAN KARAKTERISASI KATALIS Mg ZnxFOH SERTA ...
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SEMINAR TESIS
SINTESIS DAN KARAKTERISASI KATALIS Mg1-xZnxFOH
SERTA APLIKASINYA PADA REAKSI TRIMETILHIDROKUINON DAN ISOFITOL
Pembimbing : Prof.Dr.rer.nat.Irmina Kris MurwaniDr. Afifah Rosyidah, M.Si
JOHANIS PAULUS TULI DJAWA 1414 201 004
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PENDAHULUAN
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Katalis
Reaksikimia
Dihasilkankembali
Sangat Penting di Industri
Laju reaksi
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KatalisPemisahan sulit Pencemaran air dan korosi Tidak dapat digunakan kembali
Homogen
Heterogen
Pemisahan mudah Ramah lingkungan Dapat digunakan kembali
HZSM-5(Tajbaksh dkk., 2016)
NaOH, H2SO4
(Hajek dkk., 2012)
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TMHQ + Isofitol
α Tokoferol Benzofuran
Golongan Vitamin E Antioksidan, antibakteri, antikanker(Mingzhang dkk., 2013)
Usboko (2011)
MgF2
Selektivitas 47,10%Selektivitas 2,74%
Rendahnya keasaman
Produk
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MgF2
Mg1-xZnxFOH
Keasaman <<
Modifikasi
Asam Bronsted Asam Lewis
OH- Zn2+
Keasaman >>
Reaksi TMHQ danIsofitol
Aktivitas Selektivitas
wojciechowska,,2003Troncea dkk, 2011
RUMUSAN MASALAH
? ?
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Aktivitas >>>
Selektivitas >>>
DopingOptimum Zn
Mg1-xZnxFOH
TUJUAN
MANFAAT
Informasi Bidang Katalis
Katalis Heterogen Aktif
Reaksi TMHQ dan Isofitol
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TINJAUAN PUSTAKA
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TINJAUAN PUSTAKA
Peneliti Katalis Kelemahan
Bonrath dkk. (2007) Tm (OTf)3Mahal, susah diperolehlogam tanah jarang
Ayuudiyaningsih dkk. (2007) Al bentonit Produk masih tercampur
logam Al dari katalis
Usboko (2011) MgF2 Selektivitas rendah
Bonrath dkk. (2000) MC-(CF3SO2)2NH Kondisi reaksi sulit
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METODE PENELITIAN
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Sintesis Katalis
MgFOH Mg1-xZnxFOH
Uji KatalisisReaksi TMHQ dan IP
Hasil Reaksi
HPLC
Karakterisasi
StrukturXRDFTIR
Permukaan1. Adsorpsi Gas N22. Adsorpsi Piridin-
FTIR3. SEM
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HASIL DAN PEMBAHASAN
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ANALISIS TERMAL KATALIS MgFOH (x = 0)
350 °C
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DIFRAKTOGRAM XEROGEL MgFOH
MgF2
Mg(OH)2
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MgF2
Mg(OH)2
SETELAH KALSINASI
DIFRAKTOGRAM KATALIS MgFOH
27,30 40,42 53,57
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DIFRAKTOGRAM XEROGEL Mg1-XZnxFOH
SEBELUM KALSINASI
A PENGERINGAN VAKUM
34,50 40,50 60,0253,50
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DIFRAKTOGRAM KATALIS Mg1-XZnxFOHB KALSINASI
27,30 40,42 53,57
31,84 36,33
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HASIL FTIR XEROGEL Mg1-XZnxFOH
O-H H-O-HC-H C-O
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HASIL FTIR KATALIS Mg1-XZnxFOHSETELAH KALSINASI
METOKSI
O-H H-O-H
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KEASAMAN KATALIS Mg1-XZnxFOH
B B + LL
B
L
Abs
orba
nsi(
a.u)
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KURVA ISOTERMAL ADS DES N2 KATALIS Mg1-XZnxFOH
0,1
0,025 0,05 0,075
0,15
MgF2Mg(OH)2 MgFOH
H3H1 H2
H2 H2 H2
H2 H2
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Katalis Luas Area
(m2 / g)
Diameter pori
(nm)
MgF2 40,231 12,01
MgFOH 92,488 3,06
Mg0,975Zn0,025FOH 84,208 3,05
Mg0,950Zn0,05FOH 180,255 3,03
Mg0,925Zn0,075FOH 190,055 3,03
Mg0,90Zn0,10FOH 206,488 3,05
Mg0,850Zn0,15FOH 212,608 3,05
SERAGAM
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HASIL KATALISIS
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HASIL KATALISIS KATALIS Mg1-XZnxFOH PADA REAKSI ANTARA TMHQ DAN ISOFITOL
86,13%
60,93%
LUAS PERMUKAAN>>KONVERSI >>
Benzofuran
Produk lain
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HUBUNGAN KEASAMAN TERHADAP KONVERSI TMHQ
AS. LEWIS >>KONVERSI >>
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KEASAMAN VS YIELD 60,93%
27,25%
KOMPOSISI B DAN L SAMAYIELD>>
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SELEKTIVITAS HASIL KATALISIS
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70,75%
SELEKTIVITAS BENZOFURAN
36,61%
Benzofuran
Produk lain
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70,75%
HUBUNGAN KEASAMAN DAN SELEKTIVITAS BENZOFURAN
KOMPOSISI B DAN L SAMASELEKTIVITAS >>
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SEM
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X= 0 X= 0,1
HASIL SEM
Morfologi tidak teratur
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OHHO
O
HO
OH
R
H
-H2O
O
HOHO
R
O R
HO
O R
AKTIVASI TMHQ
PEMBENTUKAN KARBOKATION
BENZOFURAN
USULAN MEKANISME REAKSI SINTESIS BENZOFURAN
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KESIMPULAN DAN SARAN
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Mg1-xZnxFOH
0,025 0,05 0,075 0,1 0,150
Diameter Pori seragam ( 3 nm)
Luas Permukaan >>
Keasaman Lewis dan Bronsted
Konversi 83,13%Selektivitas 72,93%Yield 60,62%
√√√
KONVERSISELEKTIVITAS DAN YIELD
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SEKIAN DAN TERIMA KASIH
Prof. Dr. rer. nat. Irmina Kris Murwani
Dr. Afifah Rosyidah, M.Si
Dosen - dosen penguji
Teman-teman tim riset katalis heterogen
Laboratorium KME dan Laboratorium Energi ITS
Keluargaku tercinta
Semua pihak yang mendukung dalam penyusunan Tesis ini