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All Journal World Chemical Engineering Journal FLYWHEEL : Jurnal Teknik Mesin Untirta JURNAL INTEGRASI PROSES Teknika: Jurnal Sains dan Teknologi Jurnal Teknika Jurnal Teknik Mesin METAL : Jurnal Sistem Mekanik dan Termal Trends in Mechanical Engineering Research
Harly Demustila
Universitas Sultan Ageng Tirtayasa
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation Other

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Sintesi Syngas dari Gliserol dengan Reaksi Steam Reforming Menggunakan Katalis Cu/γ-Al 2 O 3 -K 2 O Demustila, Harly
TEKNIKA Vol 10, No 1 (2014): Juli
Publisher : Fakultas Teknik Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Penelitian ini berupaya untuk membuat Syngas dari gliserol dengan reaksi Steam Reformingmenggunakan komponen aktif logam Cu. Fase aktif logam Cu sangat aktif pada rentangtemperatur relatif rendah, yaitu sekitar 200-300 °C. Percobaan kali ini bertujuan untukmempelajari pengaruh komponen aktif logam Cu dengan menggunakan penyangga γ-Al 2 O 3dan promotor K 2 O, sehingga diharapkan sintesis Syngas dengan menggunakan reaksiSteam Reforming gliserol dapat berlangsung pada temperatur relatif lebih rendah.Percobaan dilakukan dalam tiga tahap. Tahap pertama, pembuatan tiga katalis terdiri darikatalis 4%Cu/γ-Al 2 O 3 -0,15%K 2 O, 6%Cu/γ-Al 2 O 3 -0,15%K 2 O dan 8%Cu/γ-Al 2 O 3 -0,15%K 2 O.Tahap kedua, karakterisasi seluruh katalis dengan uji kuat remuk menggunakan metodeCrushing Strength dan uji luas permukaan aktif katalis dengan metode BET Isothermal.Tahap ketiga, uji aktifitas seluruh katalis di dalam reaktor Fixed Bed pada temperatur 300°C, tekanan atmosfer dan rasio mol Steam/gliserol=6 selama 7 jam. Katalis 8%Cu/γ-Al 2 O 3 -0,15% K 2 O ternyata mampu menghasilkan konversi gliserol terbesar yaitu 86,35%.Penelitian lebih lanjut masih diperlukan terhadap katalis Cu/γ-Al 2 O 3 -K 2 O dengan konsentrasifase aktif lebih besar untuk reaksi Steam Reforming gliserol.
SINTESIS SYNGAS DARI GLISEROL DENGAN REAKSI STEAM REFORMING MENGGUNAKAN KATALIS Cu/γ-Al2O3 -K2O Harly Demustila
Jurnal Teknika Vol 10, No 1 (2014): Edisi Juni 2014
Publisher : Faculty of Engineering, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/tjst.v10i1.6635

Abstract

Penelitian ini berupaya untuk membuat Syngas dari gliserol dengan reaksi Steam Reforming menggunakan komponen aktif logam Cu. Fase aktif logam Cu sangat aktif pada rentang temperatur relatif rendah, yaitu sekitar 200-300 °C. Percobaan kali ini bertujuan untuk mempelajari pengaruh komponen aktif logam Cu dengan menggunakan penyangga γ-Al2O3 dan promotor K2O, sehingga diharapkan sintesis Syngas dengan menggunakan reaksi Steam Reforming gliserol dapat berlangsung pada temperatur relatif lebih rendah. Percobaan dilakukan dalam tiga tahap. Tahap pertama, pembuatan tiga katalis terdiri dari katalis 4%Cu/γ-Al2O3-0,15%K2O, 6%Cu/γ-Al2O3-0,15%K2O dan 8%Cu/γ-Al2O3-0,15%K2O. Tahap kedua, karakterisasi seluruh katalis dengan uji kuat remuk menggunakan metode Crushing Strength dan uji luas permukaan aktif katalis dengan metode BET Isothermal. Tahap ketiga, uji aktifitas seluruh katalis di dalam reaktor Fixed Bed pada temperatur 300 °C, tekanan atmosf er dan rasio mol Steam/gliserol=6 selama 7 jam. Katalis 8%Cu/γ-Al2O3-0,15% K2O ternyata mampu menghasilkan konversi gliserol terbesar yaitu 86,35%. Penelitian lebih lanjut masih diperlukan terhadap katalis Cu/γ-Al2O3-K2O dengan konsentrasi fase aktif lebih besar untuk reaksi Steam Reforming gliserol.
EKSTRAKSI KITOSAN BERBASIS CANGKANG KEONG MAS (Pomacea canaliculata) MENGGUNAKAN GELOMBANG ULTRASONIKASI Nufus Kanani; Endarto Yudo Wardhono; Muhammad Triyogo Adiwibowo; Mekro Permana Pinem; Wardalia Wardalia; Harly Demustila; Muhamad Farhan; Ropi Anwari
JURNAL INTEGRASI PROSES Vol 12, No 2 (2023)
Publisher : JURNAL INTEGRASI PROSES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/jip.v12i2.22217

Abstract

Kitosan adalah polisakarida yang berasal dari kitin, suatu zat yang ditemukan dalam cangkang hewan golonagn krustasea. Kitosan memiliki sifat-sifat tertentu yang membuatnya bermanfaat dalam berbagai bidang industri, seperti farmasi, kesehatan, dan pangan. Kitosan merupakan hasil deasetilasi dari kitin. Sumber kitin bisa diperoleh dari jenis hewan arthropoda salah satunya yaitu pada keong mas (Pomacea canaliculata). Keong mas adalah organisme invasif yang dapat merusak tanaman padi dan tanaman air lainnya dan dapat menjadi ancaman serius bagi pertanian. Proses ekstraksi untuk mendapatkan kitosan dari cangkang keong mas melalui tiga tahapan proses yaitu deproteinasi, demineralisasi, dan deasetilasi menggunakan gelombang ultrasonikasi yang membutuhkan beberapa variasi agar mendapatkan hasil optimal. Penelitian ini memiliki tujuan untuk menginvestigasi pengaruh jenis pelarut pada proses demineralisasi (HCl 1M, FeCl3 1%, dan HCl : FeCl3 2:1), konsentrasi NaOH pada proses deasetilasi (20, 30, dan 40%), serta lama waktu ekstraksi terhadap derajat deasetilasi (DD) dari kitosan. Perhitungan DD dilakukan menggunakan metode titrasi. Nilai derajat deasetilasi optimal diperoleh pada penggunaan variasi demineralisasi menggunakan pelarut HCl 1M : FeCl3 1% 2:1, dengan konsentrasi NaOH proses deasetilasi yaitu 40% dan lama waktu deasetilasi selama 60 menit menghasilkan nilai derajat deasetilasi sebesar 88,35%.
Sessile Drop Method Prediction of Particleboard Mechanical Properties Mekro Permana Pinem; Aldiansyah Rudy Adiwinoto; Yusvardi Yusuf; Dhimas Satria; Dwianto Dwianto; Sunardi Sunardi; Hendra Hendra; Nufus Kanani; Harly Demustila; Dimas Triwibowo
METAL: Jurnal Sistem Mekanik dan Termal Vol 8, No 1 (2024): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/metal.8.1.6-13.2024

Abstract

Agriculture waste-based materials have considerable potential as wood-based particleboard alternatives. It has been produced abundantly from nature and considers an eco-friendly material. One of the enormous resources is the paddy by-product, rice straw (about 500 million tonnes per year worldwide). In this work, the mechanical properties of rice straw-based particleboard are predicted easily and quickly using the sessile drop method.  Rice straw was crushed into 2-5 mm diameter powder-like materials, and corn starch was used as the binder. The rice straw particleboard was formed under a hot press machine (5 MPa, 180°C and 120 minutes). Conventionally, the sample mechanical property was tested through Universal Testing Machine (UTM). Unfortunately, the process is costly and difficult to access. It is necessary to have a rapid and low-cost presumption of the mechanical particleboard properties toward more efficient manufacturing. This work proposes a simple sessile drop method to indicate particleboard mechanical properties. Multiple linear regression was performed to see the correlation between sessile drop and UTM testing. It was found statistically that the sessile drop method could be used as an early prediction of particleboard mechanical properties.
Designing Size and Stack Number of Fuel Cell Urban Vehicle Nazwa, Intan; Satria, Dhimas; Jannah, Miftahul; Listijorini, Erny; Setiawan, Ipick; Pinem, Mekro Permana; Suprayogi, Dedy Triawan; Kanani, Nufus; Demustila, Harly
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 10, No 1 (2024): April
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/fwl.v10i1.25506

Abstract

A fuel cell converts the energy in the chemical reaction of a continuously supplied fuel and its oxidizing agent into electrical energy. Fuel cells are used in various industries, including the automotive industry. In this context, fuel cell electric vehicles (FCEVs) have emerged as a promising alternative that offers zero emissions and competitive performance. This work was conducted to obtain a fuel cell design and determine the fuel cell modeling that suits the needs of FCEVs. The Pahl and Beitz method with QFD is used. It was found that the type of fuel cell used is PEMFC (Proton Exchange Membrane Fuel Cell) with platinum electrode material, and the fuel used is hydrogen on a small scale. Overall, fuel cell dimensions were 175 x 259 x 175 mm, and the number of fuel cell stacks that can be arranged is 35. With this geometry, the factor of safety value obtained at the stack fuel cell is 26, and at the end plate fuel cell 2.4, this value indicates that the PEMFC design is safe. Then, the output voltage is 50.55 V, and the output current is 25.27 A, so the power generated is 1.277 kW.
Influence of chitosan addition on the properties and characteristics of acrylic acid-chitosan based superabsorbent prepared through gamma irradiation technique and its application for urea loading Jayanudin, Jayanudin; Lestari, Retno Sulistyo D.; Barleany, Dhena Ria; Pitaloka, Alia Badra; Yulvianti, Meri; Demustila, Harly; Yulianto, Amin; Anggoro, Dendy Vito; Ruhiatna, Adam
Jurnal Teknika Vol 19, No 2 (2023): AVAILABLE ONLINE IN NOVEMBER 2023
Publisher : Faculty of Engineering, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/tjst.v19i2.20842

Abstract

Superabsorbent can be used as a carrier for urea-fertilizer which can release urea slowly and can be used as a dry soil moisturizer. The main goal of the current study was to investigate the influence of adding chitosan grafted onto acrylic acid as a superabsorbent base material on the properties and characteristics of the resulting superabsorbents. The method used to prepare the superabsorbent was the gamma irradiation technique. Acrylic acid was neutralized by adding KOH, and then chitosan was added. The mixture was put in a plastic container, followed by irradiation with gamma rays. The formed superabsorbent was washed and dried in an oven, then the dry superabsorbent was analyzed for its properties and characteristics. The results showed that superabsorbent properties such as swelling ratio (from 49.38 g/g to 49.38 g/g), water retention (0.43%-0.89% after 7 days), and urea loading (86.75% to 96.4%) were affected by the amount of chitosan added. However, adding too much chitosan can reduce the superabsorbent properties. The characterization of the superabsorbent revealed a smooth surface with a porous structure, and FTIR analysis showed that chitosan was grafted onto acrylic acid.   
PENGARUH PENAMBAHAN RICE BRAN WAX PADA COATING FILM BERBASIS KITOSAN JAMUR TIRAM TERHADAP PENYUSUTAN BERAT DAN pH BUAH TOMAT Nufus Kanani; Muhammad Triyogo Adiwibowo; Indar Kustiningsih; Heri Heriyanto; Rusdi Rusdi; Harly Demustila; Wardalia Wardalia; Endarto Yudo Wardhono; Widya Ernayati Kosimaningrum; Meri Yulvianti; Muhammad Gofar; Ila Maghfirotul Fahira
JURNAL INTEGRASI PROSES Vol 13, No 1 (2024)
Publisher : JURNAL INTEGRASI PROSES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/jip.v13i1.25753

Abstract

Tomat (Solanum lycopersium L) merupakan buah yang memiliki kandungan air yang tinggi, sehingga mudah mengalami kerusakan dan mengurangi masa simpan tomat. Coating film pada tomat dapat berfungsi untuk melindungi tomat dari kerusakan fisik dan kimia. Kitosan jamur tiram sebagai bahan dasar pembentukan coating film memiliki kelebihan yaitu bersifat kuat dan fleksibel, namun kitosan memiliki kelemahan, yaitu bersifat hidrofilik sehingga perlu penambahan bahan lain untuk memperbaiki karakteristiknya, yaitu dengan penambahan rice bran wax. Penelitian ini dilakukan melalui tahapan pelarutan kitosan dalam asam asetat, penambahan rice brand wax 20-50% (w/v), pembentukan coating film menggunakan metode grafting dengan bantuan gelombang ultrasonik pada temperatur 90°C selama 10-60 menit, dan pengaplikasian coating film pada tomat. Dari penelitian yang dilakukan diperoleh hasil tomat tanpa coating yang dianalisis selama 7 hari menunjukkan tanda pembusukan, sedangkan tomat dengan coating film tetap segar. Penambahan rice brand wax berpengaruh pada penurunan susut bobot tomat. Pada konsentrasi rice bran wax 1-5% menunjukkan bahwa coating film mampu mengurangi penyusutan berat tomat dibandingkan tanpa coating. Penurunan susut bobot tertinggi berturut-turut sebesar 7,88%; 7,71%; 5,8%; 4,57% dan 4,33%. Penambahan rice brand wax juga berpengaruh pada banyaknya gas etilen yang dihasilkan. Kadar gas etilen yang dihasilkan pada hari ke 7 dengan dan tanpa adanya pelapisan berturut-turut sebesar 7,89 dan 1,95 ppm.  
Identifikasi Cacat pada Proses Manufaktur Plastik Anti Bakteri menggunakan Mesin blown film Hendra, Hendra; Awang, Muhamad; Pinem, Mekro Permana; Satria, Dhimas; Nugraha, Kurnia; Septiana, Reski; Ekasari, Ekasari; Demustila, Harly; Hernadewita, Hernadewita; Hardian, Frengki
Jurnal Teknik Mesin Vol 17 No 2 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.2.1381

Abstract

One example of the current development of the plastic industry is Anti-Bacterial Plastic. Anti-bacterial plastic is a plastic that can store food well, even for a relatively long time compared to plastic in general. In the industrial world, companies are required to continue trying to find various ways and efforts to be able to compete with other companies that have the same business field. Defective products are products produced from a factory or industry where the product does not meet predetermined product quality standards. According to consumers, a good quality standard is if the product can be used according to consumer needs. However, if the product cannot be used according to consumer needs, then the product can be said to be a defective product. By analyzing defects in the antibacterial plastic manufacturing process, it can be useful to find problems that arise in the plastic packaging manufacturing process. The research method is carried out using a process of experimentation and measurement as well as checking defects visually. From the research results, three types of defects in anti-bacterial plastic products were found, namely eyelets, shrinkage and dimensional defects. These defects are characterized by spots on the plastic surface, wrinkles on the plastic surface, and dimensional differences in the plastic.
Evaluating Emulsion Dynamics: The Role of Surfactants and Mixing Conditions in Non-Baffled Configurations Kanani, Nufus; Kustiningsih, Indar; Wardhono, Endarto Yudo; Wardalia, Wardalia; Heriyanto, Heri; Adiwibowo, Muhammad Triyogo; Rusdi, Rusdi; Hartono, Rudi; Demustila, Harly; Damayanti, Demietrya Renata Sashi; Maulida, Alyssa Shafira; Priyatna, Aufa Irsyad
World Chemical Engineering Journal VOLUME 8 NO. 2 DECEMBER 2024
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v8i2.30085

Abstract

The study investigates the impact of surfactant concentration and mixing time on the physical properties and stability of emulsions in non-baffle mixing systems. Surfactants, known for their ability to reduce interfacial tension, play a pivotal role in enhancing emulsion stability by promoting uniform droplet dispersion and reducing coalescence. Experiments were conducted using varying surfactant concentrations (0, 5, and 10 mL) to evaluate their effects on key parameters such as density, viscosity, Reynolds number, emulsion height, and stability over time. The results revealed that higher surfactant concentrations significantly improved emulsion uniformity and stability, with the 10 mL concentration yielding the most consistent outcomes. However, the absence of baffles introduced challenges, including prolonged mixing times and stratification tendencies, underscoring the need for optimized mixing configurations. These findings have practical implications for industries reliant on stable emulsions, highlighting the importance of balancing surfactant concentration and mixing dynamics to achieve efficient and cost-effective processes.
The manufacture and distribution temperature of aluminum molding for plastic beam from waste PP H, Hendra; Putra, Yoga Rahmadi; Septiana, Reski; Hernadewita; Demustila, Harly; Rispandi; Hermiyetti; Rahmayetty
METAL: Jurnal Sistem Mekanik dan Termal Vol. 9 No. 1 (2025): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/metal.9.1.46-53.2025

Abstract

One method utilized in the production of plastic goods is injection molding. An essential part of the injection molding process is a mold, which is used to create different types of plastic goods in accordance with a preset design. The goal of this study is to create plastic beam molding molds using the EDM and milling production methods and evaluate the molds' form geometry and resilience to temperature. The material's thermal conductivity is 200 W/m.k. due to the properties of the 1060 aluminum alloy. It can be determined that the low mold temperature during the injection process causes plastic products to distort and swell. The results show that the EDM machining technique achieved a frequency of 142.8% and a duty cycle value of 57%. Using barrel temperatures of 1600C and 250°C for temperature resistance tests, the mold was determined to be in rather good condition when exposed to high temperatures. This is demonstrated by the results of testing the shape's geometry, which showed similarity in the product's dimensions with the mold and an increase in the product's dimensions.
Co-Authors Adiwinoto, Aldiansyah Rudy Aldiansyah Rudy Adiwinoto Anggoro, Dendy Vito Awang, Muhamad Barleany, Dhena Ria Damayanti, Demietrya Renata Sashi Dhimas Satria Dimas Triwibowo Dwianto Dwianto Dwianto, Dwianto Ekasari Ekasari, Ekasari Endarto Yudo Wardhono Endarto Yudo Wardhono Fauzan, Ghazi Hardian, Frengki Haryadi, Haryadi Hendra H Hendra Hendra Hendra Hendra Hendra, Hendra Heri Heriyanto Heriyanto, Heri Hermiyetti Hernadewita Hernadewita, Hernadewita Ila Maghfirotul Fahira Jannah, Miftahul Jayanudin Jayanudin Kanani, Nufus Kustiningsih, Indar Lestari, Retno Sulistyo D. Listijorini, Erny Maulida, Alyssa Shafira Mekro Permana Pinem Mekro Permana Pinem Mekro Permana Pinem, Mekro Permana Meri Yulvianti Muhamad Farhan Muhammad Gofar Muhammad Triyogo Adiwibowo Nazwa, Intan Nazwa, Intan Nufus Kanani Nufus Kanani Nufus Kanani, Nufus Nugraha, Kurnia Pinem, Mekro Permana Pinem, Mekro Permana Pitaloka, Alia Badra Priyatna, Aufa Irsyad Putra, Yoga Rahmadi Rahmayetty Rispandi Ropi Anwari Rudi Hartono Ruhiatna, Adam Rusdi Rusdi Rusdi, Rusdi Septiana, Reski Septiana, Reski Setiawan, Ipick Sunardi Sunardi Sunardi Sunardi Sunardi, Sunardi Suprayogi, Dedy Triawan Triwibowo, Dimas Ula, Shofiatul Wardalia Wardalia Wardalia Wardalia Wardalia, Wardalia Widya Ernayati Kosimaningrum Yulianto, Amin Yulvianti, Meri Yusuf, Yusvardi Yusuf, Yusvardi Yusvardi Yusuf Yusvardi Yusuf Zahran, Raihan Rabby