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All Journal Majalah Forum Teknik UGM Jurnal Rekayasa Proses HUMANIS Reaktor Jurnal Sains Materi Indonesia Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Jurnal Bahan Alam Terbarukan Seminar Nasional Teknik Kimia Kejuangan ATAVISME JURNAL ILMIAH KAJIAN SASTRA Jurnal Rekayasa Proses Gelar : Jurnal Seni Budaya Ghancaran: Jurnal Pendidikan Bahasa dan Sastra Indonesia Jurnal Teknik Kimia Indonesia Jurnal Sosial dan Teknologi Jurnal Akademika Kimia Makara Journal of Technology Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri International Proceedings of Nusantara Raya Jurnal Akademika Kimia Jurnal Rekayasa Proses Lingua Technica: Journal of Digital Literary Studies
Hary Sulistyo
Departemen Teknik Kimia Fakultas Teknik, Universitas Gadjah Mada
Religion Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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SINTESIS MONO- DAN DIASILGLISEROL DARI MINYAK GORENG KELAPA DAN GLISEROL Larasati Dian Permatasari; Wahyudi Budi Sediawan; Hary Sulistyo
Prosiding Sains Nasional dan Teknologi Vol 13, No 1 (2023): PROSIDING SEMINAR NASIONAL SAINS DAN TEKNOLOGI 2023
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/psnst.v13i1.9763

Abstract

Monoasilgliserol (MAG) dan Diasilgliserol (DAG) adalah surfaktan non-ionik yang banyak digunakan dalam industri makanan, farmasi, dan kosmetik. MAG dan DAG dapat disintesis melalui gliserolisis Triasilgliserol (TAG) atau esterifikasi asam lemak. Pada penelitian ini MAG, dan DAG disintesis dari reaksi gliserolisis antara minyak goreng kelapa dan gliserol. Tujuan penelitian ini adalah untuk mengetahui pengaruh suhu terhadap konversi Triasilgliserol (TAG) dan fraksi konsentrasi produk. Penelitian dilakukan secara batch dengan perbandingan mol reaktan 1:1 dan variasi suhu 150°C, 160°C, 170°C, 180°C, dan 190°C. Katalis yang digunakan pada penelitian ini adalah NaOH 1%. Sampel diambil setiap 15 menit selama 90 menit reaksi. Sampel dianalisis dengan Thin Layer Chromatography (TLC) untuk mengetahui fraksi konsentrasi produk. Hasil percobaan menunjukkan bahwa pada rentang suhu tertentu, semakin tinggi suhu akan meningkatkan konversi. Namun, jika suhu optimal terlampaui, konversi akan menurun. Konversi tertinggi diperoleh pada suhu 170°C yaitu 52,16% dengan fraksi konsentrasi MAG 12,83% dan DAG 39,33%.
The Processing of Glycerol with Acetone to Produce Solketal Using Amberlite IR 120 Na Catalyst: Comparison of solketal Production Using Gas Chromatography Fikrah D. I. Sawali; Hary Sulistyo; Wahyudi B. Sediawan; Moh. A. Afandy
Jurnal Akademika Kimia Vol. 11 No. 4 (2022)
Publisher : Universitas Tadulako

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Abstract

Solketal is a chemical that can be made by combining glycerol with acetone. This compound can be used as a fuel oil additive to improve the cold flow properties of liquid transportation fuels, reduce specific emissions, aid in the reduction of gum formation (oil sap), increase oxidation stability, and increase the octane number by up to 2.5 points to accelerate the initiation process in motor fuel combustion. The addition of solketal, a bio-additive material in biodiesel, is expected to reduce emissions from diesel engines. Solketal can reduce glycerol waste created from biodiesel synthesis in addition to reducing resultant emissions because glycerol waste can be used as the primary raw material in the process manufacture of the solketal. The purpose of this research is to find out The catalytic process of glycerol and acetone using Amberlite IR 120 Na catalyst was traced using gas chromatography analysis. Solketal formation analysis using gas chromatography was used in this study. According to the results of gas chromatography analysis, the solketal produced without going through the distillation process has a purity of 23.54%, while the solketal produced after going through the distillation process has a purity of 38.94% when compared to the synthetic solketal produced by Sigma Aldrich, which has a purity of 95.67%. To manufacture solketal with a higher level of purity, the batch method was improved by adding a distillation process step to remove the water content and acetone that was still present in the sample.
Sintesis Surfaktan Non-ionik Berbasis Asam Palmitat Melalui Reaksi Esterifikasi dengan Gliserol Purbaningdyah, Emma; Sulistyo, Hary; Sediawan, Wahyudi Budi
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Esterification of glycerol using the fatty acids is one of methods that is widely used in the conversion of glycerol to synthesize products containing monoacylglycerol (MAG) and diacylglycerol (DAG). Among the various types of surfactants, monoacylglycerol (MAG) and diacylglycerol (DAG) are the most widely used of non-ionic surfactants in many industries such as food, pharmacy and cosmetic. This study aims to determine the effect of temperature on the conversion of palmitic acid and the concentration fraction of products. This research was conducted in a batch system with the temperature variations of 80°C, 100°C and 120°C; using 1% HCl catalyst concentration of palmitic acid mass, and reactant mole ratio of 1:1 (glycerol: palmitic acid). Samples were taken every 10 min during 120 min of reaction, to be analyzed by Thin Layer Chromatography (TLC) to determine the concentration fraction of products. The experimental results showed that increasing temperature enhanced the products formation, thus, increased the fraction concentration of products. However, the highest conversion of palmitic acid (80.14%) was obtained at 120°C, with concentration fraction of 1.67% monoacylglycerol (MAG), 10.96% diacylglycerol (DAG) and 6.01% triacylglycerol (TAG).
Potensi Selulosa Bakteri Sebagai Pembalut Luka Ideal dan Penghantar Obat (Drug Delivery) Liau, Selva Susilowati; Hidayat, Muslikhin; Sulistyo, Hary
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

The wound healing process requires an environment that can maintain moisture, absorb excess exudate, and is biodegradable. Conventional wound dressings such as cotton, gauze, and bandages cause wound dehydration. Bacterial cellulose derived from the fermentation of coconut water by Acetobacter xylinum bacteria has unique characteristics that have the potential to be an ideal wound dressing because it can provide a moist environment. It also has good mechanical properties, biodegradability, high biocompatibility, and is non-toxic. Bacterial cellulose produces fine fibres forming a thin layer of extracellular polysaccharides. Such fibre makes it possible to bind to the molecules of the drug. This research will study the mechanical properties and efficiency of drug mass transfer from bacterial cellulose membranes with different carbon sources, namely glucose and fructose, with fermentation time variations of 3, 5, and 7 days. The results showed that the characteristic value of the fructose carbon source was superior to that of glucose. The glucose carbon source has a membrane thickness of 0.81; 6,93; 10.61 mm; fructose is 2.80; 8,41; 13.40 mm. The highest absorption capacity, stress, elongation and drug mass efficiency value is obtained by a fructose carbon source with a fermentation time of 7 days, and for absorption capacity obtained at 1.1640 g/g, stress value 105.9 N with elongation 19.90 mm and drug mass efficiency 4.085%
Pemanfaatan Membran Selulosa Bakteri dari Limbah Kulit Pisang sebagai Matriks Masker Antioksidan Wibowo, Claudia Shinta Octa; Hidayat, Muslikhin; Sulistyo, Hary
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Banana skins have several potential applications in the health and beauty industries. Through a fermentation process with the help of Acetobacter xylinum, it produces banana skin bacterial cellulose. It is possible to further process this cellulose into a face mask matrix. Bacterial cellulose has biodegradable properties, a low toxicity value, and a good absorption ability to be applied as a face mask matrix. The addition of serum to the mask matrix aims to focus on the function of the formulated matrix. Methods: filtering the sample; making nata de banana skin with different fermentation times; making a matrix mask; matrix mask characterization; and data analysis. The results of the study showed that the variation of different fermentation times can affect the resulting cellulose products. The optimal fermentation time for producing nata was 10 days, resulting in a thickness of 0.92 cm. Then, the evaluation tensile strength test on the mask matrix revealed the highest value was also a 10-day fermentation variation, 3.000–10.000 kg/cm2. And last, the best test of the release of vitamin C is the 10-day fermentation variation.
Sintesis Asil Gliserol Melalui Reaksi Esterifikasi Asam Oleat dengan Gliserol Husada, Caesar Purnama; Sulistyo, Hary; Sediawan, Wahyudi Budi
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Acyl glycerol derivatives from oleic acid, especially monoacylglycerol (MAG) and diacylglycerol (DAG), are products that is widely used in the food, lubricant, and cosmetic industries. Acyl glycerol can be obtained through esterification reaction of glycerol with fatty acids.  This study aims to determine the effect of temperature on the conversion and amount of acyl glycerol produced. This research was conducted using a batch system with temperature variations of 80°C, 100°C, and 120°C with HCl 1%wt as catalyst and 1:1 reactant mole ratio (glycerol: oleic acid) for 2 hours reaction time. Samples were taken every 10 minutes, then the samples were analyzed using Thin Layer Chromatography (TLC) to determine the fraction of the product produced. The experimental results showed that increasing the temperature will produce higher conversions and acyl glycerols. The highest conversion of oleic acid occurred at 120°C (43.016%), with mole percentage of 1,796% monoacylglycerol (MAG), 3,820% diacylglycerol (DAG), and 5,813% triacylglycerol (TAG).
Penurunan Kadar COD Limbah Cair Industri Batik menggunakan Adsorben Nata de Coco Veronika, Chintia; Sulistyo, Hary; Hidayat, Muslikhin
Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri 2023: Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

Limbah cair adalah polutan yang tidak terlepaskan dari suatu industri batik, baik industri besar maupun industri kecil. Efek dari limbah yang dihasilkan tentu bisa mengganggu keseimbangan lingkungan. Kandungan limbah batik dengan zat organik seperti COD (Chemical Oxygen Demand) yang tinggi, dapat menyebabkan pencemaran lingkungan. Penelitian ini bertujuan untuk mengetahui kemampuan selulosa bacterial pada limbah padat nata de coco sebagai adsorben limbah cair batik, dan mengetahui kinerja dari adsorben nata de coco dalam menurunkan kandungan COD dalam limbah cair industri batik. Penelitian ini menggunakan variasi massa absorben 0.25, 0.5, 0.75, dan 1 gram, dengan variasi waktu kontak yang digunakan adalah 20, 40, 60, 80, 100, dan 120 menit dan variasi suhu 28°C (tanpa pemanasan), 35°C dan 40°C. Penelitian skala laboratorium ini menggunakan alat refluks yang sederhana. Berdasarkan proses adsorpsi yang dilakukan, efisiensi penyisihan COD terbesar adalah 88.96% dan kapasitas adsorpsi zat kimia organik dalam limbah cair batik sebanyak 8914.36 mg/L yang terjadi pada waktu kontak 60 menit dengan suhu 30°C dan jumlah adsorben yang menghasilkan nilai efisiensi penyisihan tersebut adalah sebesar 0.75 gram.
Pemodelan dan simulasi kinetika reaksi alkoholisis minyak Jarak pagar (Jatropha curcas) dengan katalisator zirkonia tersulfatasi Heri Rustamaji; Hary Sulistyo; Arief Budiman
Jurnal Rekayasa Proses Vol 4 No 1 (2010): Volume 4, Number 1, 2010
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.571

Abstract

Jatropha oil is a very potential source of biodiesel fuel that can be processed through alcoholysis. In the present work, a study on alcoholysis of Jatropha oil with the use of solid acid catalyst was conducted in a wellmixed batch reactor. The study involved varying reaction temperatures of 100°C to 140°C, ethanol-oil molar ratio of 9, agitation speed of 1000 rpm and catalyst loading of 3% with respect to the oil. The reaction was carried out for 120 minutes; meanwhile samples were taken from the reactor every 15 minutes for glycerol analysis. In order to predict kinetics parameter of the alcoholysis reaction, a mathematical model of consecutive reactions was developed. The Matlab software was used to solve the simultaneous differential equations. Over the range of variables used in the experiment, the mathematical model was able to fit the experimental data quite well. The calculation results showed that the values of collision frequency factor for the consecutive reactions are 5.13 x 103; 5.682 x 103, and 2.534 x 103 (cm3/mgek) (cm3/g.cat/min). Meanwhile, the activation energies for the consecutive reaction are 4,176; 4,310 and 6,019 cal/mol.
Mathematical modelling and simulation of hydrotropic delignification Indah Hartati; Wahyudi Budi Sediawan; Hary Sulistyo; Muhammad Mufti Azis; Moh Fahrurrozi
Jurnal Rekayasa Proses Vol 13 No 1 (2019): Volume 13, Number 1, 2019
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.42364

Abstract

Delignification is a fundamental step in bio-refinery for lignocellulose feedstock processing. Hydrotropic delignification is considered as a promising alternative compared to other conventional delignification processes due to the use of mild chemicals. In this paper, a quantitative description of hydrotropic delignification for a cylindrical biomass particle is presented by using fundamental concepts of chemical kinetics and transport processes. The development of hydrotropic delignification model was based on following assumptions: i) lignin in the biomass is immobile, ii) delignification is considered as a simultaneous process which involves intra-particle diffusion of hydrotropic agent followed by second order reaction for lignin and hydrotropic chemical, as well as intra-particle product diffusion. Finite difference approximation was applied to solve the resulting partial and ordinary differential equations. The simulation results of the proposed model may describe the concentration profiles of lignin, hydrotropic agent and soluble product distributions in a cylindrical solid particle as a function of radial position and time. In addition, the model could also predict the concentration of hydrotropic agent and soluble product in the liquid phase as well as the yield and conversion as a function of time. A local sensitivity analysis method using one factor at a time (OFAT), has been applied to investigate the influence of particle size and hydrotropic agent concentration to the yield and conversion of the hydrotropic delignification model. Validation of the proposed model was conducted by comparing the numerical results with an analytical solution for a simple case diffusion in cylinder with constant surface concentration and in the absence of chemical reaction. The validation result showed that the hydrotropic delignification model was in good agreement with the analytical solution.
Being and Experiencing: Jamasan Tombak Kyai Upas Sebagai Ritual Warisan Mataram Yogyakarta di Kabupaten Tulungagung dalam Perspektif David N. Elkins Santosa, Bagus; Lestari, Sri; Sulistyo, Hary; Indianto S, Dimas
Humanis Vol 28 No 4 (2024)
Publisher : Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JH.2024.v28.i04.p01

Abstract

This study examines the Jamasan Kyai Upas ritual, a Mataram Yogyakarta heritage still practiced by the Tulungagung community. While traditionally associated with the Yogyakarta Sultanate, the Kyai Upas spear, a symbolic heirloom of Tulungagung, remains a significant cultural element. The study explores the ritual’s historical continuity, its symbolic meaning, and the community’s beliefs surrounding the heirloom. Using a qualitative ethnographic approach, this research employs Elkins’ (1998) theory of spirituality, which emphasizes being and experiencing as awareness of transcendence and core values in life. Data was collected through interviews to link cultural beliefs (being) and experiences (experiencing) with the ritual. Findings reveal that (1) the Kyai Upas spear connects Tulungagung’s identity with the Yogyakarta Sultanate and (2) the spear symbolizes good fortune and safety for the Tulungagung community, grounded in historical and contemporary contexts.
Co-Authors Abu Hasan Achmad Noerkhaerin Putra Agus Prasetya Ahmad Tawfiequrrahman Yuliansyah Alfiana Adhitasari Anita Arsyad Arief Budiman Astri Senania, Astri Candra Rahma Wijaya Putra Deddy Setiawan Dwi Ardiana Setyawardhani EKA SARI faruk faruk Fatimah Tresna P Fikrah Dian Indrawati Sawali Handayani, Maulidiya Umi Heri Rustamaji Husada, Caesar Purnama Indah Hartati Indah Hartati INDAH PURNAMASARI Indianto S, Dimas Indra Perdana Indra Perdana Indra Perdana Jati Wardani, Sofia Kidung Wulan Utami Larasati Dian Permatasari Liau, Selva Susilowati Merry Ad'hadi Moh Fahrurrozi Moh. Azhar Afandy Moh. Fahrurrozi Mohammad Fahrurrozi Muhammad Mufti Azis Muslikhin Hidayat Novita Wiedhasari Nurul Hijja Mazlan Nuryoto Purbaningdyah, Emma Rizka Lestari Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rumtini Rumtini, Rumtini S Syamsiah Santosa, Bagus Saripah Sobah Sartika, Endang Sarto Siti Syamsiah Solichin, Moh. Badrus Sri Lestari Sudibyo Sudibyo Suharto Honggokusumo Suharto Honggokusumo Suharto Honggokusumo Suprihastuti, Sri Rahayu Sutijan Veronika, Chintia Wahyudi B. Sediawan Wahyudi Budi Sediawan Wahyudi Budi Sediawan Wahyudi Budi Sediawan Wahyudi Budi Sediawan Wahyudi Budi Sediawan Wibowo, Claudia Shinta Octa Zen Adi Laksana