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Erin Ryantin Gunawan
Chemistry Department FMIPA Universitas Mataram, Jl. Majapahit No. 62 Mataram 83125
Religion Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Energy Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

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Journal : Jurnal Pijar MIPA

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Effect of Acid Catalyst on Epoxydation Reaction of Nyamplung Seed Oil Saputri, Dita Ayu; Suhendra, Dedy; Gunawan, Erin Ryantin; Murniati, Murniati
Jurnal Pijar Mipa Vol. 20 No. 1 (2025)
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i1.6338

Abstract

Epoxy is a cyclic ether compound that contains an oxirane group and has been widely applied as a stabilizer, plasticizer in polyvinyl chloride (PVC), surfactant, pesticide raw material, and as a polymer resin coating. The raw materials in epoxy synthesis come from petroleum derivatives, which are non-renewable natural resources. Therefore, there is a need for alternative raw materials that can be renewed, such as vegetable oil. In this study, nyamplung seed oil was used. Epoxy synthesis is usually carried out using carboxylic acid epoxidation with the help of an acid catalyst. This research aims to determine the effect of the type of acid catalyst and its concentration on the epoxidation reaction of nyamplung seed oil and the characterization of the epoxy produced. The research results show that using an acid catalyst can increase the formation of oxirane groups at a certain concentration, where the highest oxirane number value was obtained when using the H2SO4 catalyst, namely 3.15%. The resulting epoxy is pale yellow, has a typical absorption area (COC) at a wave number of 825 cm-1, an iodine value of 13.96 g iod/100 g, a viscosity of 20.80 cP, and a relative per cent conversion to oxirane of 73.4 %
Extraction and Characterization of Moringa Seed Oil Results from Soxhletation and Screw Pressing Handayani, Sri Seno; Gunawan, Erin Ryantin; Suhendra, Dedy; Murniati, Murniati; Bali, Rizka Dhia Khalilah; Sari, Gita Sagita
Jurnal Pijar Mipa Vol. 20 No. 1 (2025)
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i1.8245

Abstract

Moringa seed oil is a vegetable oil that has many benefits for health and the pharmaceutical industry. Moringa seed oil can be extracted either chemically or mechanically. This research aims to characterize moringa seed oil’s physicochemical properties and fatty acid composition using soxhletation chemical extraction and screw-pressing mechanical extraction with various pretreatment temperatures of 50, 60, and 70°C. The research showed that the highest yield of moringa seed oil, 41.74%, was obtained at an initial treatment temperature of 70°C using the soxhletation method for 6 hours. The acid value of moringa seed oil from soxhletation is 2.01 mg KOH/g, and screw pressing is 4.37 mg KOH/g. The iodine number from soxhletation was 66.62 mg iod/100g, and screw pressing was 60.27 mg iod/100g. The density of the oil from soxhletation and screw pressing is 0.922 mg/mL and 0.934 mg/mL, respectively, with an oil viscosity of 3.298 cP and 3.424 cP. The results of GC-MS analysis show that moringa seed oil from soxhletation has an oleic acid composition of 40.92%, while the screw pressing has an oleic acid composition of 22.50%. This finding demonstrates the influence of extraction methods on the fatty acid profile, particularly the concentration of oleic acid, a key component of moringa seed oil. These results contribute to understanding how specific extraction techniques can optimize the quality of moringa seed oil.
Optimization of Biodiesel Synthesis from Kapok Seed Oil (Ceiba pentandra) through Transesterification Reaction with a TiO2 Catalyst Rozitawati, Mona; Gunawan, Erin Ryantin; Suhendra, Dedy; Farida Ariani
Jurnal Pijar Mipa Vol. 20 No. 7 (2025)
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i7.10514

Abstract

Biodiesel represents a renewable, environmentally friendly, and locally producible alternative to conventional diesel fuel. This research synthesized biodiesel from kapok seed oil (Ceiba pentandra) via transesterification using a TiO₂ catalyst, with process parameters optimized to maximize yield. Kapok seed oil was extracted using Soxhlet extraction with n-hexane and purified by vacuum column chromatography. The transesterification process involved systematic variation of the oil-to-methanol molar ratio, catalyst mass, reaction temperature, and reaction time. Optimal conditions were established at a 1:10 molar ratio, 0.20 g of catalyst mass, a reaction temperature of 60 °C, and a reaction time of 90 minutes, resulting in a biodiesel yield of 71.58%. Characterization of the biodiesel revealed a density of 0.88 g/mL, viscosity of 3.10 cSt, acid value of 1.89 mg NaOH/g, and saponification value of 231.879 mg KOH/g. GC-MS analysis identified methyl palmitate, methyl linoleate, and methyl oleate as the principal methyl ester components, with methyl oleate as the predominant species. These findings demonstrate that biodiesel derived from kapok seed oil possesses properties suitable for use as an alternative fuel that meets established quality standards.
Co-Authors 'Ardhuha, Jannatin A. Wahab Jufri A.A. Ketut Agung Cahyawan W Adiguna, Sya’ban Putra Agus Abhi Purwoko Ali Djamhuri Anggi Solehah Arlia, Erma Azumi, Baiq Miftah Balafif, Ragaya Abd. R Bali, Rizka Dhia Khalilah Basri, Nurul Hasan Dedy Suhendra Diah Miftahul Aini Dina Asnawati Emmy Yuanita Erin Ryantin Gunawan Faradis, Taritsu Hazal Farida Ariani Gunawan Gunawan Izzati, Assifa Joni Rokhmat Lalu Haris Budiarto, Lalu Haris LALU RUDYAT TELLY SAVALAS Lely Kurniawati Lilik Mariana Listantia, Nora Mahiran Basri Murniati Murniati . Murniati Murniati Nurhidayanti . Pomeistia, Meilynda Qurba, Pujana Ragaya Abd. R. Balafif Rahmiati Rahmiati Ramdani, Nanila Rischia, Amida Rozitawati, Mona Saputri, Dita Ayu Sari, Gita Sagita Siska Ayu Wulandari, Siska Ayu Sri Seno Handayani Sri Seno Handayani Sukarso, A. A. Sukiman Sukiman Suriadi . Suriadi Suriadi Usiana, Shilan Yanti, Sepia Dwi Yayuk Andayani Zaer, Ziana