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Purwo Handoko, Donatus Setyawan
Jurusan Kimia, Fakultas Matematika Dan Ilmu Pengetahuan Alam Universitas Jember
Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Public Health Social Sciences

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Conversion 9-Methyl Octadecene to 1-Octadecanol Handoko, Donatus Setyawan Purwo
Proceeding Biology Education Conference: Biology, Science, Enviromental, and Learning Vol 12, No 1 (2015): Prosiding Seminar Nasional XII Biologi
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (646.553 KB)

Abstract

The investigations of methyl oleate (methyl 9-octadecenoate) to convert 1-octadecanol, has been done. The conversion was carried out using ZSiA catalysts and fixed bed reactor that was operated at 400, 450, and 500 oC. ZSiA catalyst was prepared by washing zeolite with aquadest, followed by dipping in HCl 2M solution, adding Na2SiO3 5% b/b, dipping in NH4Cl 2M, calcination at 500 oC under nitrogen with flow rate of 20 mL/min for 2 hours, oxydation under oxygen flow rate of 20 mL/min. Characterization of the catalyst included determination of metal content using AAS, acidity using gravimetric method, surface area using Gas Sorption Analyzer NOVA 1000, and crystallinity using XRD. The fixed bed reactor was filled by catalyst and heated up to 400 oC under hydrogen flow rate of 20 mL/min. Then the feed (methyl oleate or methyl 9-octadecenoate) in evaporator was heated up to 400 oC under hydrogen flow rate of 20 mL/min. The reaction product was collected in glass tube and analyzed using GC-MS. Catalytic hydrogenation of methyl oleate produced 87,21% of 1-octadecanol as major product. 1-octadecanol product decreased significantly by the increase of hydrogen flow rate from 20 to 60 mL/min and for 5 to 15 grams catalysts.Keywords: methyl oleate, 1-octadecanol, ZSiA catalysts
PENINGKATAN MUTU MINYAK JELANTAH MENGGUNAKAN ADSORBEN ZEOLIT DAN REAKTOR SISTEM FLUID FIXED BED Handoko, Donatus Setyawan Purwo
Proceeding Biology Education Conference: Biology, Science, Enviromental, and Learning Vol 11, No 1 (2014): Prosiding Seminar Nasional XI Biologi
Publisher : Universitas Sebelas Maret

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Abstract

Abstract - Investigation of increasing waste cooking oil quality have been done using H-zeolite as an adsorbent and fluid fixed bed reactor which was operated in a various temperatures. H-zeolite adsorbent was prepared through physical and chemical treatments as follows : washing, acid, calcination and oxidation. The characterization of this adsorbent covered cations contain (Pb, Cu, Zn, Na, K, Ca and Fe) using AAS, Si/Al ratio using AAS, surface area spesific, pore volume and pore diameter using surface area analyzer NOVA 1000 and acidity using gravimetric method with amonia adsorption. Quality parametric of cooking oil that was investigated covered water contain, acid and peroxide value and density. Waste cooking oil as a sample was cooking oil which have been used for frying kerupuk, tempe and tahu three times. Fifty milliliter waste cooking oil was flowed throught 10 g H-zeolite adsorbent in fluid fixed bed reactor which was operated at various temperatures (50, 70, 90, 110 oC). The oil was placed in the bottle to be analyzed. The results of this research showed that the adsorpstion process for increasing quality of waste cooking oil using H-zeolite adsorbent  and fluid fixed bed reactor could reduce the water contain, acid and peroxide value and density. The optimum temperature was 70 oC. Keywords :zeolite, waste cooking oil, acid and peroxide value
PENGARUH TEMPERATUR TERHADAP KINERJA KATALIS Ni/ZEOLIT PADA REAKSI HIDROGENASI KATALITIK Donatus Setyawan Purwo Handoko; Triyono Triyono; Narsito Narsito; Tutik Dwi Wahyuningsih
Reaktor Volume 12, Nomor 4, Desember 2009
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (338.127 KB) | DOI: 10.14710/reaktor.12.4.218 – 225

Abstract

Kinetika hidrogenasi katalitik 1-oktadekena telah dipelajari pada pengaruh temperatur reaksi. Katalis Ni/Zeolit dipreparasi melalui tahapan perlakuan asam (HF, HCl, NH4Cl), kalsinasi dengan N2, oksidasi dengan O2 dan reduksi dengan H2 serta impregnasi logam Ni (Ni(NO3)2.6H2O) melalui teknik impregnasi basah dan pertukaran ion. Uji aktivitas katalis dilakukan pada reaksi hidrogenasi katalitik 1-oktadekena pada variasi temperatur yaitu 400°C, 450°C dan 550°C dengan laju alir gas H2 yang tetap, 15 mL/menit. Hasil penelitian menunjukkan bahwa reaksi hidrogenasi katalitik senyawa 1-oktadekena pada temperatur 400°C memilki  konstanta laju reaksi (k) dan energi aktivasi berturut-turut 0,0900 menit-1 dan -46,14 kJ/mol. Laju reaksi hidrogenasi katalitik senyawa 1-oktadekena dengan katalis Ni/zeolit semakin menurun dengan meningkatnya temperatur reaksi pada rentang temperatur 400 hingga 550oC.
AKTIVITAS DAN SELEKTIVITAS KATALIS Ni/H5NZA TERHADAP HIDRORENGKAH METIL OLEAT MENJADI SENYAWA HIDROKARBON FRAKSI PENDEK Ratno Budiyanto; Donatus Setyawan; Novita Andarini
Jurnal Kimia Riset Vol. 3 No. 1 (2018): Juni
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (964.029 KB) | DOI: 10.20473/jkr.v3i1.8902

Abstract

It has conducted on the activity and selectivity of Ni/H5NZA catalyst toward the hydrocracking of oleat methyl catalytic becomes short fraction hydrocarbon compounds with the variation of Ni concentration such as 1%, 2% and 3% (% w/w) for oleat methyl catalytic hydrocracking becomes short fraction hydrocarbon compounds (C5-C11 hydrocarbon). The catalyst is prepared by wet impregnation method, then followed by calcinations at 500oC, oxidation at 400oC and reduction at 500oC, each of them are followed by a stream of nitrogen, oxygen and hydrogen with ± 5mL/second in stream velocity. The characterization of catalyst includes the determination of Si/Al ratio, Ni metal that were impregnated by using AAS instrument, and the acid determination by using gravimetric method. The hydrocracking process is done in flow-fixed bed reactor at 500oC; the catalyst are heated at first and followed by the reactants which are heated in pyrolysis reactor up to it change into vapor, then they are moved into the hydrocracking reactor. The liquid from hydrocracking process is collected and analyzed by using Gas of Chromatography (GC) and Gas of Chromatography-Mass spectrometer (GC-MS). The characterization results showed in general that Si/Al ratio decreases after being impregnated by Ni metal. The amount of Ni metal almost reach a half of early Ni concentration which is impregnated. On the other hands, the acid amount of catalyst after being impregnated by Ni metal rise higher than those before being impregnated by Ni metal. The research showed that the activity and selectivity of Ni-2%/H5NZA catalyst is better in hydrocracking hydrocarbon compounds which are shorter. The activity of Ni-2%/H5NZA catalyst reaches 91.3041%. Meanwhile the selectivity is more selective in creating the hydrocarbon compounds with C5-C11 chain and more lead to the formation of alkane and alkene. Keywords: methyloleate, catalyst, Ni/H5NZ,hydrocracking
The Improvement of Waste Cooking Oil Quality using H5-NZA Adsorbent in Fluid Fixed Bed Reactor Donatus Setyawan P Handoko
Jurnal ILMU DASAR Vol 10 No 2 (2009)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (598.466 KB)

Abstract

Investigation of waste cooking oil quality improvement have been done using H-zeolite as an adsorbent and fluid fixed bed reactor which was operated in a various temperatures. H-zeolite adsorbent was prepared through physical and chemical treatments as follows: washing, acid, calcination and oxidation. The characterization of this adsorbent covered cations contain (Pb, Cu, Zn, Na, K, Ca and Fe) using AAS, Si/Al ratio using AAS, surface area spesific, pore volume as well as pore diameter using surface area analyzer NOVA 1000, and acidity using gravimetric method with amonia adsorption. Quality parametric of cooking oil that were investigated covered water contain, acid as well as peroxide value and density. Sample of waste cooking oil was taken from cooking oil which have been previously used three times for frying kerupuk, tempe and tahu. Fifty milliliter waste cooking oil was flowed throught 10 g H-zeolite adsorbent in fluid fixed bed reactor which was operated at various temperatures (50, 70, 90, 110oC). The oil was placed in the bottle to be analyzed. The results showed that the adsorpstion process using H-zeolite adsorbent and fluid fixed bed reactor could reduce the water contain, acid and peroxide value and density, thus it improved quality of waste cooking oil. The optimum temperature was 70oC.
Utilization of Waste Tobacco (Nicotiana Tabacum) Post-Harvest as an Alternative Biodiesel Donatus Setyawan Purwo Handoko
Jurnal Multidisiplin Madani Vol. 2 No. 12 (2022): December 2022
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/mudima.v2i12.1780

Abstract

The aims of this research is process into biodiesel. Biodiesel is produced using transesterification reactions with variations of tempetature. Tobacco seed oil is extracted to obtain edible oils as biodiesel. The content of free fatty acid (FFA) in edible oils should be minimized to obtain a high yield of transesterification. The catalyst used in converting edible oils into biodiesel is homogeneous alkaline catalyst. Biodiesel with the higest yield from transesterification reactions with a temperature of 70 oC. Biodiesel was characterized the functional group  and  phsycal properties including density and viscosity
Conversion of 1-Octadenaol into Short Chain Alkenes and Alkanes Using Zsia Catalyst and Fluidized Bed Reactor at a Temperature of 400OC Donatus Setyawan Purwo Handoko; Triyono
Formosa Journal of Science and Technology Vol. 2 No. 1 (2023): January, 2023
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/fjst.v2i1.2611

Abstract

Research has been carried out on the catalytic conversion of 1-octadecanol compounds into 1-octadecene alkanes at high temperatures (400oC) in a fluidized bed reactor. The research results obtained are as follows; Hydrogenation of 1-octadecanol was carried out in a fluidized bed reactor. The hydrogenation of 1-octadecanol was carried out in a fluidized bed reactor at a temperature of 400oC with 10 g of ZSiA catalyst and 10 g of pure 1-octadecanol reactant.The results of the study showed the following results: catalytic hydrogenation of 1-octadecanol with ZSiA catalyst at 400oC produced alkanes and alkenes in the chain length range up to C18 reaching 49.60% and the dominant compound produced was 1-octadecene with a relative concentration of up to 20 ,21 %.
Effect of Acid Treatment on the Opening of Catalyst Pores Donatus Setyawan Purwo Handoko
Formosa Journal of Science and Technology Vol. 2 No. 1 (2023): January, 2023
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/fjst.v2i1.2612

Abstract

Research on the effect of acid treatment on the opening of the pore mouths on the surface of the zeolite catalyst has been carried out. The preparation of the zeolite catalyst was carried out through the processes of soaking, calcination, oxidation and reduction. Initially, the zeolite was soaked for 3 hours in distilled water, then drained and crushed until its size passed a 100 mesh sieve, followed by a calcination process with nitrogen for 5 hours. Then proceed with oxidation for 3 hours followed by a reduction process for 2 hours with hydrogen. Furthermore, the catalyst was impregnated with Ni from the salt Ni.(NO3).6H2O After that the catalyst is stored and placed in a desiccator. Then an analysis of the catalyst obtained with AAS was carried out to determine the content of Na, Ca, Fe, Mg and K cations, and the content of Al and Si. Then continued with the analysis of acidity with gravimetric method and continued with analysis with the BET method to determine the specific surface area and pore size distribution. Furthermore, the catalyst is used in the catalytic cracking process at various temperatures.
Synthesis and Characterization of Glutaraldehyde-Crosslinked Chitosan for Urea Controlled Release Piluharto, Bambang; Indarti, Dwi; Handoko, Donatus Setyawan Purwo; Ananda, Tinok Dwi
Indonesian Chimica Letters Vol. 3 No. 2 (2024)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/icl.v3i2.4325

Abstract

Urea exhibits high nitrogen content (∼46%), which is essential for plant growth. However, significant nitrogen losses occur through decomposition, leaching, denitrification, and volatilization. Employing controlled-release systems, such as chitosan membranes crosslinked with glutaraldehyde, can mitigate these losses and enhance fertilizer efficiency. Therefore, this study aimed to develop and characterize chitosan-glutaraldehyde membranes as controlled-release fertilizer systems for urea. Chitosan membranes were crosslinked with varying glutaraldehyde concentrations (0%, 0.4%, 0.9%, 1.3%, and 1.8%) and used to encapsulate urea. The membrane produced was characterized using FTIR and swelling degree assay. The potency of glutaraldehyde-crosslinked chitosan as a urea coating agent was also studied spectrophotometrically using the Nessler reagent. FTIR analysis revealed low intensity of the C=N stretching vibration, indicating limited crosslinking reaction. Additionally, both swelling degree and urea release increased proportionally with increasing glutaraldehyde concentration. These findings suggest limited crosslinking reactions occurred between glutaraldehyde and chitosan within the studied concentration range.
The Cracking of 1-Octadecanol Into Short Chain Alkane and Alkene Compounds Handoko, Donatus Setyawan Purwo; Triyono
Formosa Journal of Sustainable Research Vol. 4 No. 1 (2025): January 2025
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/fjsr.v4i1.13716

Abstract

Research has been carried out on the cracking mechanism of 1-octadecanol into short chain alkane and alkene compounds using a cracking technique using a Fluid Fixed Bed reactor, which is operated at temperatures between 450 oC to 500 oC for 30 minutes. The catalyst is positioned so that the feed vapor passes through a number of catalysts. The resulting product was analyzed using GC-MS. The results obtained are as follows. With the Ni/ZSiA catalyst, the catalytic hydrogenation of 1-octadecanol to 1-octadecene reached 20.21 percent, 5-octadecene reached 14.37 percent, and 9-octadecene reached 10.40 percent. The main product of catalytic hydrogenation is 1-octadecene. The results obtained at a hydrogen flow rate of 10 mL/minute and a temperature of 450 oC produce maximum alkane and alkene products < C12 (15.29%)
Co-Authors Bambang Piluharto Bangun, Morina D.W., Tutik Dwi Indarti Handayani, Wuryati Kristianto, Nehemia Fernandes Lestari, Wiwit Puji Narsito Narsito Narsito Narsito Novita Andarini Ratno Budiyanto Tinok Dwi Ananda Triyono Triyono Triyono Triyono Triyono Triyono Tutik Dwi Wahyuningsih Wahid Hasyim, Wahid Yudi Aris Sulistiyo, Yudi Aris