Sintesis dan Karakterisasi Katalis LaZnPO4 dan Optimasi Waktu Reaksi Katalisisnya pada Konversi Selulosa Menjadi 5-Hidroksimetilfurfural (5-HMF)

Affifah, Nur Rahmayanti (2023) Sintesis dan Karakterisasi Katalis LaZnPO4 dan Optimasi Waktu Reaksi Katalisisnya pada Konversi Selulosa Menjadi 5-Hidroksimetilfurfural (5-HMF). Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Katalis LaZnPO4 telah disintesis dengan perbandingan mol La : Zn : PO4 sebesar 0,95 : 0,05 : 4,00. Katalis hasil sintesis dikarakterisasi dengan X-ray Diffraction (XRD), spektrofotometer inframerah (FTIR), adsorpsi piridin-FTIR, adsorpsi-desorpsi N2, dan Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy (SEM-EDX). Hasil sintesis didapatkan katalis berupa serbuk padatan berwarna putih. Hasil karakterisasi dengan XRD menunjukkan katalis LaZnPO4 memiliki struktur kristal heksagonal, karakterisasi dengan adsorpsi piridin-FTIR menunjukkan situs keasaman Lewis dan Brønsted, karakterisasi dengan adsorpsi-desorpsi N2 menunjukkan isoterm adsorpsi tipe IV, dan karakterisasi dengan SEM menunjukkan morfologi berupa gumpalan tidak teratur. Aktivitas katalis diuji pada reaksi konversi selulosa, glukosa, dan fruktosa menjadi 5-HMF dengan variasi waktu katalisis yaitu 30, 60, 90, 120, dan 150 menit. Hasil uji katalisis menunjukkan waktu reaksi optimum selama 120 menit untuk ketiga reaktan awal, yaitu selulosa, glukosa, dan fruktosa. Konversi, yield, dan selektivitas 5-HMF dari reaksi selama 120 menit dengan reaktan awal selulosa masing-masing 90,53; 73,32; dan 80,99%. Konversi, yield, dan selektivitas 5-HMF dari reaksi selama 120 menit dengan reaktan awal glukosa masing-masing 51,85; 46,74; dan 90,50%. Konversi, yield, dan selektivitas 5-HMF dari reaksi selama 120 menit dengan reaktan awal fruktosa adalah 98,43; 81,29; dan 82,59%. Pengamatan rute reaksi konversi selulosa menjadi 5-HMF didapatkan bahwa pembentukan 5-HMF tidak hanya berasal dari rute fruktosa saja, namun dapat berlangsung melalui rute lainnya
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LaZnPO4 catalyst have been synthesized with ratio of La : Zn : PO4 = 0.95 : 0.05 : 4.00 mol. The synthesized catalyst was characterized by X-ray Diffraction (XRD), infrared spectrophotometer (FTIR), pyridine-FTIR adsorption, N2 adsorption-desorption, and Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy (SEM-EDX). The synthesis results obtained catalyst in the form of a white solid powder. The characterization with XRD show that LaZnPO4 catalyst has a hexagonal crystal structure, characterization with pyridine-FTIR adsorption show Lewis and BrØnsted acidity sites, characterization with N2 adsorption-desorption show type IV adsorption isotherms, and characterization with SEM show that the catalyst has a morphology in the form of irregular clumps. Catalyst activity was tested on the cellulose, glucose, and fructose conversion to 5-HMF with catalysis time variations of 30, 60, 90, 120, and 150 minutes. The results showed optimum reaction time at 120 minutes for the all three reactants. The conversion, yield, and selectivity of 5-HMF from 120 minutes reaction with the initial reactants of cellulose are 90,53; 73,32; and 80,99%. The conversion, yield, and selectivity of 5-HMF from 120 minutes reaction with the initial reactants of glucose are 51,85; 46,74; and 90,50%. The conversion, yield, and selectivity of 5-HMF from 120 minutes reaction with the initial reactants of fructose are 98,43; 81,29; and 82,59%. The reaction route of cellulose conversion to 5-HMF observed that the formation of 5-HMF does not only occurs from the fructose route, but can occurs through other routes

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Katalis, Lantanum Fosfat, Konversi Selulosa, Waktu Reaksi; 5-Hidroksimetilfurfural, Catalyst, Lanthanum Phosphate, Cellulose Conversion, 5-Hydroxymethylfurfural
Subjects:	Q Science Q Science > QD Chemistry Q Science > QD Chemistry > QD320 Cellulose. Hydrolysis Q Science > QD Chemistry > QD501 Catalysis. Catalysts.
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Nur Rahmayanti Affifah
Date Deposited:	03 Aug 2023 14:49
Last Modified:	29 Aug 2023 02:38
URI:	http://repository.its.ac.id/id/eprint/102101

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