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All Journal INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Communications in Science and Technology Jurnal Sains dan Teknologi: Jurnal Keilmuan dan Aplikasi Teknologi Industri JURNAL PENDIDIKAN TAMBUSAI Community Engagement and Emergence Journal (CEEJ) MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat BERNAS: Jurnal Pengabdian Kepada Masyarakat Teknomekanik Jurnal Aerasi Jurnal Vokasi Mekanika Al-DYAS : Jurnal Inovasi dan Pengabdian kepada Masyarakat Journal of Engineering Researcher and Lecturer Ranah Research : Journal of Multidisciplinary Research and Development JTPVI: Jurnal Teknologi dan Pendidikan Vokasi Indonesia Innovation in Engineering
Arafat, Andril
Universitas Negeri Padang
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Journal : Teknomekanik

 1 
Optimization of Waste Cooking Oil’s FFA as Biodiesel Feedstock Primandari, Sri Rizki Putri; Arafat, Andril; Veny, Harumi
Teknomekanik Vol. 4 No. 1 (2021): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (366.331 KB) | DOI: 10.24036/teknomekanik.v4i1.9072

Abstract

Waste cooking oil has high Free Fatty Acid (FFA). It affected on decreasing a biodiesel production. FFA reduction is one of important processes in biodiesel production from waste cooking oil. Thus, this study aimed to examine the optimum condition in FFA reduction. The process is assisted by using ultrasonic irradiation on acid esterification. Variables of the process are acid concentration, molar ratio of methanol and oil, and irradiation time. Meanwhile temperature irradiation on 45oC is a control variable. Process optimization is conducted by Response Surface Methodology (RSM) with Central Composite Design (CCD). The optimum conditions of response were 7.22:1 (methanol to oil molar ratio), 0.92% wt H2SO4, 26.04 minutes (irradiation time), and 45oC (irradiation temperature). Ultrasonic system reduced FFA significantly compared to conventional method.
Analysis of Tensile Strength of Citronella (Cymbopogon Nardus) Fiber Reinforced Composite Materials Ardi, Julio Lukmanul; Nurdin, Hendri; Arafat, Andril; Primandani, Sri Rizki Putri
Teknomekanik Vol. 4 No. 2 (2021): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (291.912 KB) | DOI: 10.24036/teknomekanik.v4i2.10472

Abstract

The use of synthetic fibers in composite materials has a negative impact on the environment. One way to reduce this impact is to replace synthetic fibers with natural fibers. A natural fiber that has the potential as a mixed material in the manufacture of composite materials is citronella (Cymbopogon nardus) fiber. This study aims to determine the effect of volume fractions 40%, 50%, 60%, and 70% of citronella fiber with polyester resin matrix BQTN 157 on tensile strength. The process of making composites used the hand lay-up method. The specimen was formed according to the ASTM D3039 standard and the tensile strength of the specimen was tested by using a Universal Testing Machine (UTM). From the results of the study, the maximum tensile strength was found in the fiber volume fraction 70% of 77.35 MPa, the strain is 6.57%, and the modulus of elasticity is 1.177 GPa. This study indicates that fiber volume fraction affects the tensile strength of composite materials. Hence, the manufacture of composite materials which have good strength is influenced by many things such as raw materials, matrices, mixture composition, and methods.
Co-Authors Adam Mandra Suwandi Addha Ilham Affan, Muhammad Abdul Afrinaldi, Jimi Afriza Media Ahmad Sabirin Akbar, M. William Ambiyar, Ambiyar Andre Kurniawan Andre Kurniawan Andrian Saputra Anggara, Diki Ardi, Julio Lukmanul Arfianti, Fina Arwizet Arwizet, Arwizet Ayasrah, Firas Tayseer Mohammad Budi Syahri Bulkia Rahim Daffa Raihan Senthot Delima Yanti Sari Eko Indrawan Farhan Habibie Fauza, Anna Niska Fauzan Azima Febri Prasetya Firmansyah, Gusri Firmanto, Aldi Fortuna, Aprilla García, Juan Luis Cabanillas Ghandvar, Hamidreza Ghozali, Rahmatul Habibie, Farhan Hanif, Auliya Haq, Syaiful Hendri Nurdin Hendri Sawir, Hendri Hidayathullah, Ilham Idris, Mohd Hasbullah Irzal Irzal Irzal, Irzal Is Prima Nanda Ismail, Havis Jasman Jasman Jasman Joko Suprianto Junil Adri K., Arwizet M. Nasyarudin Latif Marisa, Susi Mega Oktaviani Muhammad Zikri Mulianti Nabawi, Rahmat Azis Nanda, Is Prima Nelvi Erizon Nizwardi Jalinus Nofri Helmi, Nofri Nur Ichsan Abdillah Nurdin Hendri Nurfajri Nurfajri Nurfajri Nurfajri, Nurfajri Nurfitri Rahmi Sari Pratama, Rheda Prayoga, Ongki Primandani, Sri Rizki Putri Primawati Primawati Primawati Primawati, Primawati Putra, Randi Purnama Rahmad Fariska Putra Rahmadiawan, Dieter Ramadhan, Arya Famas Ramadhan, Fanny Fadillah Remon Lapisa Rendy Dwi Putra Rheda Pratama Rifelino Rifelino Riski Camarta Rizki Rahmadian Rodesri Mulyadi Roni Eka Sahputra Rozaki Yudha, Hatami Salmat Salmat Sari, Nurfitri Rahmi Sigit Dwi Lesmana Sigit Dwi Lesmana Silfi Chorillah Putri Sri Rizki Putri Primandari Syahril Syahril Syahril Syahril Veny, Harumi Waskito Yolli Fernanda Yufrizal A Zainal Abadi Zofa, Thifal Nefri Zulhan Insan Makruf