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Pengaruh Temperatur terhadap Jumlah Produk Hidrorengkah Fraksi Aspalten dari Aspal Buton dengan Katalis Mo-Ni/γ-Alumina Nuryanto, Rahmad; Trisunaryanti, Wega; Yahya, M. Utoro
Jurnal Kimia Sains dan Aplikasi Vol 12, No 1 (2009): Volume 12 Issue 1 Year 2009
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB) | DOI: 10.14710/jksa.12.1.14-16

Abstract

Hydrocracking process of Butonian asphalt derived asphaltene using Mo-Ni/γ-alumina catalyst has been investigated. The processes were carried out in 1L stainless steel autoclave reactor. The reaction temperatures were 250, 300, 350 and 400C, initial pressure was 10 atm and catalyst/feed ratio was 1/2. The asphaltene was a pentane insoluble-benzene soluble (PI-BS) fraction of Butonian asphalt.The results of hydrocracking processes showed the conversion by means of 100% - coke (wt %) was followed equation konversi % (w/w) = 0,306 t (C) - 41,29Key words: hydrocracking, asphaltene, Mo-Ni/γ-alumina catalyst
PENGARUH PENGEMBANAN LOGAM Ni DAN Nb2O5 PADA KARAKTER KATALIS Ni/ZEOLIT DAN Ni/ZEOLIT-Nb2O5 Rodiansono, Rodiansono; Trisunaryanti, Wega; Triyono, Triyono
Jurnal Sains dan Terapan Kimia Vol 1, No 1 (2007)
Publisher : Jurnal Sains dan Terapan Kimia

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Abstract

Telah dilakukan preparasi dan karakterisasi katalis Ni/zeolit dan Ni/zeolit-Nb2O5 untuk mempelajari pengaruh pengembanan logam Ni dan Nb2O5. Katalis dibuat dengan metode impregnasi, dilanjutkan kalsinasi pada temperatur 500oC, oksidasi dan reduksi pada temperatur 400oC, masing-masing dengan aliran gas nitrogen, oksigen dan hidrogen. Karakterisasi katalis meliputi penentuan luas permukaan spesifk, rerata jejari pori dan volume total pori menggunakan metode BET, penentuan jumlah situs asam total menggunakan metode gravimetri dan kekuatan situs asam menggunakan sepektroskopi infra merah (IR).Hasil karakterisasi menunjukkan bahwa luas permukaan spesifik turun, rerata jejari pori dan volume total pori meningkat setelah pengembanan logam Ni dan Nb2O5 dibandingkan dengan zeolit. Jumlah situs asam masing-masing katalis meningkat dibanding zeolit setelah pengembanan logam Ni dan Nb2O5.Keywords: nikel,niobium oksida, katalis
HIDRORENGKAH KATALITIK MINYAK KULIT BIJI JAMBU METE (CNSL) MENJADI FRAKSI BENSIN DAN DIESEL Efiyanti, Lisna; Trisunaryanti, Wega
Jurnal Penelitian Hasil Hutan Vol 32, No 1 (2014): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Litbang Keteknikan Kehutanan dan Pengolahan Hasil Hutan

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Abstract

Penelitian ini bertujuan untuk mengetahui potensi hidrorengkah minyak kulit jambu mete menjadi fraksi energi dengan bantuan katalis. Katalis yang digunakan berbahan dasar Zeolit-Y yang berasal dari Jepang dan logam Nikel (E-Merck). Katalis NiO/ZY dipreparasi dengan metode impregnasi basah menggunakan garam prekursor Ni(NO3)2.6H2O kedalam zeolit-Y sebagai bahan pengemban. Karakterisasi katalis ditentukan dengan metode gravimetri untuk mengetahui keasaman katalis dengan basa piridin sebagai basa adsorbat dan porositas katalis menggunakan Surface Area Analyzer (NOVA- 1000). Proses hidrorengkah dilakukan dengan reaktor sistem fixed bed menggunakan katalis NiO/ZY pada suhu 400°C, aliran gas H2 sebanyak 20ml/menit selama 1 jam dengan rasio umpan/katalis = 4. Produk yang dihasilkan dianalisis menggunakan Kromatografi Gas (GC). Hasil reaksi yang diperoleh menunjukkan bahwa hidrorengkah CNSL dengan katalis NiO/ZY menghasilkan produk cair sebanyak 80,03% dengan selektivitas bensin, diesel dan minyak berat masing-masing sebesar 38,47%, 25,88% dan 15, 74%.
Liquid and Gaseous Fuel from Waste Plastics by Sequential Pyrolysis and Catalytic Reforming Processes over Indonesian Natural Zeolite Catalysts Syamsiro, Mochamad; Cheng, Shuo; Hu, Wu; Saptoadi, Harwin; Pratama, Nosal Nugroho; Trisunaryanti, Wega; Yoshikawa, Kunio
Waste Technology Vol 2, No 2 (2014)
Publisher : University of Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12777/wastech.2.2.44-51

Abstract

In this study, the performance of several differently treated natural zeolites in a sequential pyrolysis and catalytic reforming of plastic materials i.e. polypropylene (PP) and polystyrene (PS) were investigated. The experiments were carried out on two stage reactor using semi-batch system. The samples were degraded at 500°C in the pyrolysis reactor and then reformed at 450°C in the catalytic reformer. The results show that the mordenite-type natural zeolites could be used as efficient catalysts for the conversion of PP and PS into liquid and gaseous fuel. The treatment of natural zeolites in HCl solution showed an increase of the surface area and the Si/Al ratio while nickel impregnation increased the activity of catalyst. As a result, liquid product was reduced while gaseous product was increased. For PP, the fraction of gasoline (C5-C12) increased in the presence of catalysts. Natural zeolite catalysts could also be used to decrease the heavy oil fraction (>C20). The gaseous products were found that propene was dominated in all conditions. For PS, propane and propene were the main components of gases in the presence of nickel impregnated natural zeolite catalyst. Propene was dominated in pyrolysis over natural zeolite catalyst. The high quality of gaseous product can be used as a fuel either for driving gas engines or for dual-fuel diesel engine.
PENGARUH KARAKTER KEASAMAN TOTAL DAN PORI KATALIS ZEOLIT ALAM TERIMPREGNASI LOGAM TERHADAP PEMBENTUKAN FRAKSI BENSIN PADA REAKSI HIDRORENGKAH PLASTIK POLIPROPILENA Nurcahyo, I F; Trisunaryanti, Wega; Triyono, Triyono; Wahyuni, Endang Tri
Alchemy Jurnal Penelitian Kimia Vol 7, No 1 (2008)
Publisher : Alchemy Jurnal Penelitian Kimia

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Abstract

Proses hidrorengkah fraksi berat hasil pirolisis plastik polipropilena (td 150-2500C) menjadi fraksi bensin menggunakan berbagai katalis dengan perbedaan keasaman dan karakter pori. Katalis – katalis yang digunakan yaitu zeolit alam (Z), Ni/Z, Pd/Z, NiPd/Z, dan NiPd/Z-Nb2O5. Reaksi dilakukan pada temperatur 4500C dengan perbandingan berat katalis : umpan sama dengan 1:2 menggunakan sistem air. Pada katalis dengan ukuran pori relatif besar, peningkatan keasaman total meningkatkan aktivitas katalis untuk reaktan senyawa hidrokarbon C>12. Pada katalis dengan ukuran pori yang relatif kecil peningkatan keasaman total bukan merupakan faktor penentu aktivitas katalis untuk senyawa hidrokarbon C>12 karena faktor sterik dari ukuran pori.
PREPARATION AND CHARACTERIZATION OF THE MONOMETAL CATALYST Mo/ USY Nugrahaningtyas, Khoirina Dwi; Trisunaryanti, Wega; Triyono, Triyono; Nuryono, Nuryono; Widjonarko, Dian Maruto; Mulyani, Mulyani
Alchemy Jurnal Penelitian Kimia Vol 8, No 1 (2012)
Publisher : Alchemy Jurnal Penelitian Kimia

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Abstract

This research deals with preparing and characterizing the metal based-catalyst of Mo supported on Ultra Stable Y-zeolite (USY) and, is aimed to ascertain the best produced catalyst for hydrotreatment reaction in standpoint of its capabilities on removing the unwanted-heteroatom compounds.Procedure of catalyst treatment was preparation, activation and characterization. Monometal catalyst Mo/USY was prepared under variation concentrations of salt metal precursor (concentrations), i.e 2, 6, 10 and 14% wt. The activation steps were carried out by calcination, oxidation, and reduction. Characterization of catalysts were determined by data of XRD, AAS, acidity, surface area and its porosity. The result shows that these catalysts have several good characters that supporting their usefulness in hydrotreatment-catalytic reaction. In addition, catalyst Mo10/USY performs many ideal criteria as the best functional catalyst.
PEMBUATAN, KARAKTERISASI DAN UJI AKTIVITAS KATALIS NiMo/Z DAN NiMo/Z-Nb2O5 PADA REAKSI HIDRORENGKAH FRAKSI SAMPAH PLASTIK MENJADI FRAKSI BENSIN Rodiansono, -; Trisunaryanti, Wega; Triyono, -
Berkala Ilmiah MIPA Vol 17, No 2 (2007)
Publisher : FMIPA UGM

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Abstract

Activity test of NiMo/active natural zeolite (Z) and NiMo/Z-Nb2O5 catalysts for hydrocracking of waste plastic fraction polyprophylene (PP) type were done. Catalysts were prepared by impregnation method, then were calcined at 500oC, oxidized and reduced at 400oC under nitrogen, oxygen and hydrogen stream, respectively. The characterization of catalysts including spesific surface area, average pore radius, and total pore volume were determined by gas sorption analyzer, amount of total acid sites was determined by gas sorption method, and acid site strength was confirmed by IR sepectroscopy. The hydrocracking process was carried out in a semi-flow reactor system at 360oC and catalyst/feed ratio 0.5 under hydrogen stream (150 mL/hour). The feed was vaporized from the pyrolisis reactor into the hydrocracking reactor. A liquid product was collected and analyzed by gas chromatography (GC) and gas chromatography-mass spectroscopy (GC-MS). The characterization results showed that spesific surface area, average pore radius, and total pore volume of the Z sample decreased after loading of the metal and Nb2O5. Amount of total acid sites of the catalysts were higher than that of the Z sample. The activity of catalysts followed the order of NiMo/Z>NiMo/Z-Nb2O5>Z (conversion of hydrocarbon C>12) and NiMoZ>NiMo/Z-Nb2O5>Z (total yield gasoline fraction). The selectivity of catalysts for C7-C8 product followed the order of NiMo/Z-Nb2O5>Z>NiMo/Z. Loading of Nb2O5 significantly affected the selectivity of C7-C8 product. Keywords: activity, polyprophylene, catalyst, gasoline fraction
Sifat Fisik dan Mekanik Cocofoam dari Serabut Kelapa dengan Kompon Lateks pada Beberapa Variasi Komposisi Campuran Anom, ID.K.; Setiaji, Bambang; Trisunaryanti, Wega; Triyono, Triyono
Agritech Vol 31, No 3 (2011)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.9752

Abstract

A research about cocofoam physical and mechanical properties of coconut fiber with latex compound in several varieties of composition mixture has been conducted. The purpose of the research is to analyze the influence of the cocofoam composition mixture change towards the physical and mechanical properties: specific density, cocofoam thickness after compression, tensile strength and elongation at break. The process of cocofoam making is done by mixing coconut fibers with latex compound, and then the mixture is molded, pressed, and vulcanized. The variety of composition weight from the mixture of coconut fiber with latex compound (w/w) is: 10/25 (CF5-1), 20/55 (CF5-2), 30/85 (CF5-3), 40/115 (CF5-4), and 50/145 (CF5-5) respectively. At constant volume, the cocofoam is molded with the thickness of 5 cm, and then the cocofoam is vulcanized in an oven of 80oC for 8 hours. From the statistical test result, it was discovered that the variety of coconut fiber composition mixture with latex compound in constant volume, has significant influence to the specific density, tensile strength, and elongation at break, while the compressed cocofoam does not show any significant difference to the change of the cocofoam thickness.ABSTRAKTelah dilakukan penelitian tentang sifat fisik dan mekanik cocofoam dari serabut kelapa dengan kompon lateks pada beberapa variasi komposisi campuran. Tujuan dari penelitian ini adalah untuk menganalisis pengaruh perubahan komposisi campuran bahan cocofoam terhadap sifat fisik dan mekanik yaitu: kerapatan massa, perubahan tebal cocofoam setelah kompresi, kekuatan tarik dan perpanjangan putus. Proses pembuatan cocofoam dilakukan dengan cara mencampurkan serabut kelapa dengan kompon lateks, kemudian campuran dicetak, dipres, dan divulkanisasi. Variasi komposisi berat campuran serabut kelapa dengan kompon lateks (b/b) berturut-turut adalah: 10/25 (CF5-1), 20/55 (CF5-2), 30/85 (CF5-3), 40/115 (CF5-4) dan 50/145 (CF5-5). Pada volume tetap masing-masing cocofoam dicetak dengan ketebalan 5 cm, dan selanjutnya cocofoam divulkanisasi dalam oven pada suhu 80oC selama 8 jam. Dari hasil uji statistik dapat diketahaui bahwa variasi komposisi campuran serabut kelapa dengan kompon lateks pada voleme tetap, berpengaruh secara signifikan terhadap kerapatan massa, kekuatan tarik dan perpanjangan putus, sedangkan cocofoam yang dikompresi ternyata tidak menunjukkan adanya perbedaan yang signifikan terhadap perubahan tebal masing-masing cocofoam.
Paper Strength Development with Beating and Polyamideamine-epichlorohydrin (PAE) Ulfa, Maria; Setiaji, Bambang; Trisunaryanti, Wega; Triyono, Triyono
Indonesian Journal of Physics and Nuclear Applications Vol 1 No 3 (2016)
Publisher : Fakultas Sains dan Matematika Universitas Kristen Satya Wacana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (669.244 KB) | DOI: 10.24246/ijpna.v1i3.123-127

Abstract

Thecharacter of coir handsheets prepared with beating and addition of polyamideamine-epichlorohydrin (PAE) was investigated. Pulp coir from soda-anthraquinone pulping was used as raw material for manufacture of coir handsheets. Physical and mechanical properties obtained with different beating level and PAE dosage were measured. The addition of PAE 10% w/w and beating on pulp stock of 3000 rev increased grammage and density at 1.9 and 15.8%, respectively. Instead it decreased thickness by 15.8%. Addition PAE dosage of 10% w/w at 10000 rev improved the density, but decreased the porosity and Cobb60 at 5.8; 10.2; and 19 %, respectively. The highest   dry and wet tensile were obtained at 20 % w/w of PAE. Combination of  beating and addition of PAE on pulp stock formed wet-strength handsheets with range between 28.0 to 34.2%.
Konversi Gliserol menjadi Polihidroksibutirat dengan Menggunakan Bakteri Eschericia coli Rahayu, Endah Fitriani; Trisunaryanti, Wega; Wijaya, Karna
Indonesian Journal of Chemical Science Vol 6 No 3 (2017)
Publisher : Indonesian Journal of Chemical Science

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Abstract

Conversion of glycerol into polyhydroxybutyrate (PHB) using Eschericia coli bacteria had beed evaluated. The bacteria was cultured in lactose medium, consist of 1% of lactose, peptone, and NaCl, then incubated at 37oC for 24 h. The bacteria culture was then added into the 10 g/L, 20 g/L, 30 g/L, 40 g/L, and 50 g/L glycerol media and then fermented for 24, 48, 72, and 6 h, then followed by centrifugated and solid phase was dried and weighed as a biomass. The filtrate was analyzed to determine the remaining glycerol. PHB was extracted from the biomass using chloroform, and then analyzed by FT-IR, H-NMR, C-NMR and viscometer. Monomer unit of the polymer was produced by esterification of the polymer then analyzed by GC.                Analysis generates that FT-IR, H-NMR, C-NMR, and GC shows the PHB can be synthesize from glycerol using Eschericia coli. PHB production is increasing if the time fermentation and initial glycerol concentration has been risen, with the maximum PHB produced is 92,73%. Molecular weight of PHB has maximum value if produced at initial glycerol concentration 40 g/L for 96 h. in the initial glycerol concentration 50 g/L, the molecular weight of PHB was reduced.