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All Journal CHEMISTRY PROGRESS Jurnal Penelitian Hasil Hutan Alchemy Jurnal Penelitian Kimia Indonesian Journal of Chemical Science Indonesian Journal of Chemistry Communications in Science and Technology CORD Molluca Journal of Chemistry Education (MJoCE) Bulletin of Chemical Reaction Engineering & Catalysis JURNAL REKAYASA KIMIA & LINGKUNGAN
Wega Trisunaryanti
Jurusan Kimia MIPA Universitas Gadjah Mada, Yogyakarta
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Education Energy Engineering Environmental Science Library & Information Science Materials Science & Nanotechnology

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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%.
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.
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.
ANALISIS STRUKTUR MIKRO DAN STRUKTUR KRISTAL KARBON TEMPURUNG KELAPA DAN POLIVINIL ALKOHOL (PVA) PADA TEMPERATUR TINGGI Rampe, Meytij Jeanne; Setiaji, Bambang; Trisunaryanti, Wega; ., Triyono
CHEMISTRY PROGRESS Vol 7, No 2 (2014)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.7.2.2014.7470

Abstract

Have been done conducted by micro structure study and crystal structure of coconut shell of coconut carbon andof polivinil alcohol. This research studied using alcohol polivinil (PVA) as material for stimulating growth of carboncrystal structure. Method of pelarut and calsination, temperature sintering 1500 oC and time heating done byprocess technology. Method analyse SEM-EDS for the examination of micro structure and chemical compositionand also XRD for the examination of carbon product material crystal structure. Product characterized showparticle swampy forest which not yet uniform and structure of semi-kristalin.Telah dilakukan kajian struktur mikro dan struktur kristal dari karbon tempurung kelapa dan polivinil alcohol(PVA). Penelitian ini mempelajari penggunaan polivinil alkohol (PVA) sebagai bahan utnuk menstimulasipertumbuhan struktur kristal karbon. Metode pelarut dan kalsinasi, sintering temperatur 1500 oC dan lamapemanasan dilakukan pada teknologi proses. Metode analisis SEM-EDS untuk pengujian struktur mikro dankomposisi kimia serta XRD untuk pengujian struktur kristal material produk karbon. Karakter produk yangdihasilkan menunjukkan sebaran partikel yang belum seragam dan struktur semi-kristalin.
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 : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v6i3.19668

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.
Study of green reductant effects of highly reduced graphene oxide production and their characteristics Chasanah, Uswatul; Trisunaryanti, Wega; Triyono; Oktaviano, Haryo Satriya; Santoso, Iman; Fatmawati, Dyah Ayu
Communications in Science and Technology Vol 7 No 2 (2022)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.7.2.2022.906

Abstract

The study of the green reductant effects to produce reduced graphene oxide (rGO) has been completed successfully. The reduction of graphene oxide (GO) was carried out chemically using various reductants such as ascorbic acid (rGO-AA), gallic acid (rGO-AG), and trisodium citrate (rGO-NS). The GO was prepared using the Tour method at a temperature of 65 ? for 6 hours with potassium permanganate: graphite weight ratio 1:3.5. The results showed that rGO-AA had the highest electrical conductivity value of 755.70 S/m, with characteristics such as a surface area of 255.93 m2/g, a pore volume of 0.61 cm3/g, an average pore diameter of 7.10 nm, ID/IG ratio of 1.93, and three graphene layers in the material nanostructure stack. Therefore, it can be concluded that the reduction of GO with ascorbic acid (rGO-AA) is the most effective in producing rGO.
Preparation of Mo-impregnated mordenite catalysts for the conversion of refined kernel palm oil into bioavtur Trisunaryanti, Wega; Triyono; Wijaya, Karna; Kartini, Indriana; Purwono, Suryo; Rodiansono; Mara, Ady; Budiyansah, Amsal
Communications in Science and Technology Vol 8 No 2 (2023)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.8.2.2023.1288

Abstract

The research aims to study the effects of Mo metal embedded on H-Mordenite on its activity and selectivity of hydrodeoxygenation (HDO) for Refined Palm Kernel Oil (RPKO) into bioavtur. The RPKO was obtained from the results of degumming and bleaching process of palm kernel oil and then analyzed using Gas Chromatography-Mass Spectrometer (GC-MS). The impregnation of Mo metal was carried out by spraying using an ammonium heptamolybdate precursor solution ((NH4)6Mo7O24•4H2O) with an initial Mo metal content of 5, 10, and 15wt% of H-Mordenite to produce 5-Mo/Mor, 10-Mo/Mor, and 15-Mo/Mor. The 15-Mo/Mor catalyst produced the highest amount of liquid product (46.08wt%) with bioavtur yield of 43.19wt%. The usability test showed that 15-Mo/Mor catalyst still produced a good performance after three times of use in the RPKO feed HDO with the second and third run test liquid product of 34.82 and 46.14wt% respectively with bioavtur yield of 32.58 and 43.45wt%, respectively.
Preparation of Ni/ZSM-5 and Mo/ZSM-5 catalysts for hydrotreating palm oil into biojet fuel Trisunaryanti, Wega; Wijaya, Karna; Tazkia, Aulia Meylida
Communications in Science and Technology Vol 9 No 1 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.1.2024.1442

Abstract

With the increasing demand for fuel for global usage and CO2 emissions, greener alternatives are needed, especially in biojet fuel production. Catalyst preparation involves the impregnation of Ni and Mo metals into H-ZSM-5 using a dry impregnation method with spray deposition, resulting in Ni/ZSM-5 and Mo/ZSM-5 catalysts. Catalyst characterization utilizes FT-IR, XRD, SAA, SEM-EDX, XRF, and NH3-TPD instruments. The activity and selectivity tests of the catalysts were conducted in the hydrotreating of palm oil using Ni/ZSM-5 monolayer, Ni/ZSM-5 bilayer, Mo/ZSM-5 monolayer, Mo/ZSM-5 bilayer, as well as Ni/ZSM-5 bottom-layer and Mo/ZSM-5 top-layer arrangements. The result showed double-layer Ni/ZSM-5 as the best catalyst in activity and selectivity in producing biojet fuel fractions with consecutive conversion, selectivity, and yield of 29.71%, 84.76%, and 24.34%, respectively. The layers of catalyst affected the catalytic activity and selectivity, resulting in a higher yield.
Thermal and Microstructure Analysis of Cocofoam Made from Blended Coconut Fiber with Latex Compound Anom, I. D. K.; Setiaji, Bambang; Trisunaryanti, Wega; Triyono
International Coconut Community Journal Vol 29 No 1 (2013): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (587.603 KB) | DOI: 10.37833/cord.v29i1.93

Abstract

Thermal and microstructure analysis of cocofoam made from vulcanized coconut fiber and latex compound were conducted. The cocofoam was produced by blending coconut fiber and latex compound with weight ratio of 10/25 (CF5-1) and 20/55 (CF5-2) at room temperature. The cocofoam characters were then analyzed by Scanning Electron Microscope (SEM), Thermogravimetric Analysis (TGA) and Differential Scanning Calorimetry (DTA) instruments. The result showed that the increase of coconut fiber and latex compound ratio produced a higher density of cocofoam. The highest value density was 0.6920 g/cm3 with flexibility of 90% produced by the CF5-2 sample. The SEM analysis showed that both specimens surface of the CF5-1 and CF5-2 samples have different pores size and the latex compound is not distributed thoroughly in the cocofoam. The thermal analysis showed that the production of cocofoam was largely determined by latex compound that served as fiber binder matrix. Cocofoam started to degrade at the temperature of 90°C and was damaged when it was heated at the temperature of 115°C for 2.5 hours.
Co-Authors Abd. Rasyid Syamsuri Ady Mara, Ady Aminuyati Bambang Setiaji Budiyansah, Amsal Chairil Anwar Chandra, Patrik Dian Maruto Widjonarko Endang Tri Wahyuni Fatmawati, Dyah Ayu Fitria, Anissa Fitria, Riska Astin Haryo Satriya Oktaviano Hauli, Latifah I F Nurcahyo, I F I. D. K. Anom Indriana Kartini Karna Wijaya Kartini, Indriyana Khoirina Dwi Nugrahaningtyas Lisna Efiyanti Mahayuwati, Puspa Nindro Meytij Jeanne Rampe Nugraheni, Ika Kusuma Nuryati Nuryati Nuryono Nuryono Pattiasina, Priska Marisa Persada, Anggun Angkasa Bela Rahayu, Endah Fitriani Rodiansono Rodiansono Rodiansono Saputro, Muhammad Darul Ikhsan Saviola, Aldino Javier Siti Salamah Suryo Purwono Tazkia, Aulia Meylida Triyono Triyono . Triyono Triyono Uswatul Chasanah, Uswatul Wangsa, Wangsa