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All Journal Jurnal Teknik ITS Jurnal Sains dan Seni ITS IPTEK Journal of Proceedings Series IJOG : Indonesian Journal on Geoscience Indonesian Journal of Chemistry Akta Kimia Indonesia Indonesian Journal on Geoscience Indonesian Journal on Geoscience Automotive Experiences Abdimas Altruis: Jurnal Pengabdian Kepada Masyarakat Sewagati

Zetra, Yulfi

Chemistry Department Institut Teknologi Sepuluh Nopember Kampus ITS Keputih Sukolilo Surabaya-60111

Author-ID : 2781050

Aerospace Engineering Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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Aliphatic Biomakerof Crude Oil from Juwata, Tarakan, North Kalimantan Endah Mutiara Marhaeni Putri; Eduardus Edi; R. Y. Perry Burhan; Yulfi Zetra; Agus Wahyudi; Zjahra Vianita
IPTEK Journal of Proceedings Series No 4 (2017): 2nd International Seminar on Chemistry 2016
Publisher : Institut Teknologi Sepuluh Nopember

Characteristic organic geochemistry of crude oil Juwata, Tarakan, North Kalimantan provide information about the depositional sedimental environment and maturity of the oil. Crude oil was extracted with n-hexane (50: 2) for 24 hours to separate the crude oil with asphaltene, and if precipitation does not separate perfectly then centrifuged. Extracts were then refractionated using column chromatography according to the methods McCharty base. Fractionation results are obtained in the form of the neutral fraction, the acid fraction and polar fraction. Neutral fraction separated with KLTP method and aliphatic fraction and aromatic fractions. Aliphatic fraction subsequently analyzed by GC-MS. GC-MS analysis aliphatic fraction of n-alkanes in the form of compounds, and hopane, bikadinancompounds. The pattern of distribution of n-alkanes which consists of a range of C-17 to C-33. Carbon distribution with a range of C-21 to C-33 is dominating compared to the C-17 to C-20. This distribution pattern indicates the source of organic matter from terrestrial land wax component derived from higher plants. Hopane presence of compounds in crude oil aliphatic fractionsJuwata Tarakan, North Kalimantan analyzed by fragmentogram m/z = 191. Hopane biomarker provide that information during the sedimentation stage diagenesis these compounds are degraded and stereochemical changes towards a stable isomer form, configuration changes 17α (H), 21β (H) during the process of diagenesis to a stable isomer which is 17 α (H), 21β (H) or 21β (H), 17 α (H) indicates that oil comes from the old sediments. Biomarka bikadina identified according fragmentogram m/z = 191 multiple ion fragment m/z = 109.191, 369, 397 and ion molecular m/z = 412 showed the characteristic fragment bikadinna compound. Biomarka bikadina give information influx of organic material terrestrial region. The compounds showed crude oils biomarker Juwata Tarakan, North Kalimantan derived from terrestrial depositional environments.

Synthesis and Characterization of Diesel Lubricity Enhancer through Transesterification Reaction of Palm Oil with 1,2-Ethanediol Yulfi Zetra; Sovia Masfuri Walidatus Sholihah; R. Y. Perry Burhan; R. Arizal Firmansyah
Automotive Experiences Vol 4 No 2 (2021)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Desulphurization of diesel fuel is necessary to be done to reduce sulphur content in the air. However, the desulphurization process will reduce the lubrication properties of diesel fuel. In order to overcome the problem, it needs bioadditive to improve the lubricity. Lubricity of diesel fuel can be improved by the subsistence of chemical compound that is hydroxyethyl esther (HEE). HEE is synthesized through the transesterification reaction of palm oil (triglycerides) and 1,2 ethanediol at 150 °C for 5 hours and K2CO3 catalyst as well. The conversion of TG into the products is 72.90%. The characterization using Gas Chromatography-Mass Spectrometry (GC-MS) indicates that the chemical compound in synthesis products comprise free fatty acids, hydroxyethyl esters and by-products. The obtained products can be used as bioadditives to improve the lubricity of diesel fuel.

Synthesis of Bio-additive for Low Sulphur Diesel: Transesterification of Soybean Oil and Ethylene Glycol using K2CO3 Catalyst Rhiby Ainur Basit Hariyanto; R. Arizal Firmansyah; R. Y. Perry Burhan; Yulfi Zetra
Automotive Experiences Vol 4 No 1 (2021)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

The desulphurization process of diesel fuel is carried out to reduce the amount of SO2 emissions that can cause acid rain. However, the desulphurization process in diesel fuel not only removes the sulfur compounds but polyaromatic and polar compounds are also eliminated during this process. The loss of these two compounds can reduce the lubricity properties of diesel fuel. Therefore, it is necessary to add an additive compound that can increase the lubricity properties. In this research, 2-hydroxyethyl ester (HEE) was synthesized as an additive to increase the lubricity of diesel fuel. This compound was synthesized through the transesterification reaction of soybean oil and ethylene glycol with K2CO3 as the base catalyst. The composition of the synthesized additives was analyzed using the Gas Chromatography-Mass Spectrometry (GC-MS). Based on the results of GC-MS spectrum analysis, it is known that the 2-hydroxyethyl ester compound has been formed with a yield of 66.5% (relative to the area of the chromatogram peak). The HEE compound obtained is a mixture of 2 hydroxyethyl palmitate, 2 hydroxyethyl linoleate, 2 hydroxyethyl stearate, 2 hydroxyethyl arachidonate, 2 hydroxyethyl nervate, and 2 hydroxyethyl behenate.

Karakteristik Geokimia Organik Fraksi Keton Batubara Sawahlunto, Sumatera Barat Yulfi Zetra; Amirotul Ula; Zjahra Vianita Nugraheni; R.Y Perry Burhan
Akta Kimia Indonesia Vol 2, No 1 (2017)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember

Batubara Sawahlunto, Sumatera Barat dianalisis untuk menentukan karakter geokimia organiknya. Batubara diekstraksi soxhlet dengan pelarut diklorometana:metanol (93:7). Hasil ekstrak organik difraksinasi menggunakan kromatografi kolom. Fraksi keton kemudian dianalisis menggunakan Kromatografi Gas-Spektrometri Massa (KG-SM). Analisis fraksi keton batubara Sawahlunto menunjukkan keberadaan senyawa iso dan anteiso-alkan-2-on, dan isoprenoid keton. Senyawa ini diasumsikan berasal dari rantai klorofil-α pada bakteri. Senyawa hopanon dan sikloheksil keton menunjukkan asal usul batubara dari bakteri. Peringkat kematangan batubara Sawahlunto adalah rendah dikarenakan terdapat senyawa hopanon pada batubara Sawahlunto. Proses kematangan batubara juga dapat terhambat jika komponen yang ada pada batubara berikatan dengan oksigen

UPAYA re-PRODUKSI SUMUR TUA CEKUNGAN WONOCOLO MELALUI KARAKTERISASI GEOKIMIA ORGANIK R. Y Perry Burhan; Yulfi Zetra; Pusparatu Pusparatu; Zjahra Vianita Nugraheni
Akta Kimia Indonesia Vol 4, No 1 (2019)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember

Penelitian yang dilakukan terhadap biomarka fraksi hidrokarbon alifatik menunjukkan adanya senyawa n-alkana (n-C13 - n-C27); isoprenoid pristana (Pr) dan fitana (Ph); 4,4,8,9,9-pentametildekalina; 4-b-(H)-eudesmana; 8-b-(H)-drimana; 2,3,6,9,9-pentametildekalina dan 8-b-(H)-homodrimana. Pola distribusi kelompok biomarka n-alkana ditunjukkan oleh persebaran unimodal n-C13 - n-C27, yang menunjukkan asal usul senyawa organik sedimen terdistribusi merata berasal dari fitoplankton dan zooplankton, bakteri dan tumbuhan tingkat tinggi. Rasio Pr > Ph merupakan indikator lingkungan pengendapan oksik dengan kadar garam yang rendah. Adanya senyawa 4-b-(H)-eudesmana mengindikasikan senyawa organik berasal dari tumbuhan darat tingkat tinggi konifer yang tumbuh pada zaman Devonian Akhir. Keberadaan senyawa 8-b-(H)-drimana mengindikasikan adanya masukan alga hijau, plankton dan bakteri Botryococcus braunii. Namun tingginya kelimpahan senyawa 8-b-(H)-homodrimana dibandingkan kelompok senyawa sesquiterpena lainnya merupakan indikator senyawa organik yang berasal dari tumbuhan darat tingkat tinggi. Kontribusi biomarka yang berhasil diungkapkan pada penelitian ini menunjukkan bahwa sedimen sumur tua Wonocolo ini adalah unik dan menarik untuk dipelajari lebih lanjut karena senyawa organiknya variatif, berasal dari bakteri, plankton dan tumbuhan darat tingkat tinggi.

PENINGKATAN KETERAMPILAN PEMBUATAN DAN PEMASARAN KECAP BIJI NANGKA: ALTERNATIF BAHAN PENDAMPING MAKANAN DI KEPUTIH SURABAYA Endah Mutiara Marhaeni Putri; Wahyu Prasetyo Utomo; Zein Firdaus Ramadhan; R.Y. Perry Burhan; M. Rachimoellah; Fahimah Martak; Agus Wahyudi; Yulfi Zetra; M. Nadjib Mujahid; Zjahra Vianita Nugraheni
ABDIMAS ALTRUIS: Jurnal Pengabdian Kepada Masyarakat Vol 2, No 1 (2019): April 2019
Publisher : Universitas Sanata Dharma

Synthesis of 2-Hydroxyethyl Esters from Castor Oil as Lubrication Bio-Additive Candidates for Low-Sulfur Fossil Diesel Arizal Firmansyah; Yulfi Zetra; Rafwan Year Perry Burhan; Didik Prasetyoko; Novesar Jamarun
Indonesian Journal of Chemistry Vol 22, No 3 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.73038

The present work aims to study the synthesis of 2-hydroxyethyl esters from castor oil and its lubrication properties, promising as a lubrication bio-additive in low sulfur diesel fuel. This compound has been successfully synthesized from castor oil and ethylene glycol. The oil to ethylene glycol molar ratio was adjusted to 1:10, and the catalyst loading was used at 9% mole oil. Then, the mixture was refluxed for 5 h. The product components were characterized using GC-MS. The standard ASTM method was used to study the kinematic viscosity and lubrication. The product was dominated by 2-hydroxyethyl esters (94.16%), di-ester (1.12%), and cyclic ester (1.92%). The analysis of friction coefficient and wear scar diameter (WSD) using High-Frequency Reciprocating Rig (HFRR) shows the coefficient of friction and WSD of the product better than reference diesel fuel. From the results of this study, the 2-hydroxyethyl ester of castor oil, especially 2-hydroxyethyl ricinoleate, is the main responsible for the lubricating properties. Thus, 2-hydroxyethyl esters of castor oil can be proposed as an alternative bio-additive to improve the lubrication of low-sulfur fossil diesel fuels.

Low-Calorie Coal Liquefaction Products as an Alternative Fuel Oil Yulfi Zetra; Anis Febriati; Dyah Nirmala; Rafwan Year Perry Burhan; Arizal Firmansyah; Zjahra Vianita Nugraheni
Indonesian Journal of Chemistry Vol 22, No 6 (2022)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.74584

Liquefaction of low-rank coal has been done to optimize the utilization of low-rank coal, which is less economical for obtaining alternative fuel oil. Coal samples were taken from the Bukit Pinang coal mine, Samarinda Ulu, East Kalimantan. Coal was liquefied using the NEDOL procedure at PUSPITEK, Serpong, South Tangerang, Indonesia. This Bukit Pinang coal liquefaction produces five fractions consisting of Naphta, Light Oil (LO), Middle Oil (MO), Heavy Oil (HO), and Coal Liquid Bottom (CLB) fractions. The liquefaction yield was dominated by the HO and CLB fractions (> 50% by weight). The naphtha, MO and LO fractions were fractionated using SiO2 GF254 Thin Layer Chromatography (TLC) plate. It produced aliphatic and aromatic hydrocarbon fractions. Aliphatic hydrocarbon fractions were analyzed using a Gas Chromatography-Mass Spectrometer (GC-MS), while the aromatic hydrocarbon fractions were not analyzed. Mass spectrum studies showed that the components consisted of n-alkanes, isoalkanes (branched alkanes), cycloalkanes and alkyl cycloalkanes. The aliphatic hydrocarbon components resulting from the liquefaction of low-rank coal showed its equivalence with the components that make up fuel oil. Therefore, this coal liquefaction can be suggested as an optimization for low-rank coal, which is less economical.

Peningkatan Potensi Ekonomi Masyarakat Desa Pliwetan, Kecamatan Palang, Kabupaten Tuban Melalui Pembuatan dan Pemasaran Olahan Nugget Ikan Serta Pemanfaatan Limbah Olahan Ikan Sebagai Alternatif Pupuk Organik Cair Endah Mutiara Marhaeni Putri; R.Y. Perry Burhan; Yulfi Zetra; Muhammad Nadjib Mujahid; Triyanda Gunawan; Zjahra Vianita Nugraheni
Sewagati Vol 6 No 1 (2022)
Publisher : Pusat Publikasi ITS

Potensi perikanan di Indonesia sangat besar. Pemanfaat total produk disektor perikanan di Indonesia sebagaian besar dikonsumsi dalam bentuk ikan. Untuk meningkatkan nilai ekonomi dari pengolahan ikan, olahan modern seperti Nugget ikan sangat potensial untuk diterapkan. Limbah cair industri pembuatan nugget ikan berpotensi mencemari lingkungan karena mengandung banyak bahan organik. Oleh karena itu, pada pengabdian kali ini, akan dilakukan pemanfaatan limbah ikan menjadi produk bernilai ekonomi yaitu pupuk organik cair. Dengan dilakukan pelatihan dan transfer ilmu dalam proses pembuatan dan pemasaran olahan nugget ikan serta pemanfaatan limbah olahan ikan sebagai alternatif POC. Adapun hasil yang didapatkan adalah Analisis pada nugget ikan tenggiri dan ikan tongkol masuk ke dalam persyaratan mutu SNI 7758:2013. Dan Analisis yang telah dilakukan pada pupuk organik cair memenuhi persyaratan standar kualitas kompos SNI 19-7030 2004. Diharapkan bahwa dari pengabdian ini masyarakat mendapat terobosan baru dalam hal olahan ikan modern dengan proses yang mudah dan sederhana.

Peningkatan Kompetensi Guru SMA Yapita Surabaya Melalui Pelatihan Pembuatan Modul Praktikum yang Linear dengan Kurikulum Agus Wahyudi; Fahimah Martak; Yulfi Zetra; Wahyu Prasetyo Utomo; Zjahra Vianita Nugraheni
Sewagati Vol 3 No 3 (2019)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (524.824 KB)

Kebanyakan sekolah-sekolah, terutama sekolah swasta di daerah pinggiran, tidak melakukan proses pembelajaran di laboratorium dengan proporsi yang baik untuk pelajaran kimia. Beberapa alasan yang diutarakan antara lain adalah alat laboratorium yang terbatas, bahan kimia yang susah di dapat dan terbatasnya dana untuk melakukan praktikum. Penyusunan modul praktikum untuk guru-guru ini merupakan salah satu solusi untuk mengatasi masalah diatas. Di dalam modul praktikum tersebut berisi tentang praktikum-praktikum kimia sederhana dengan peralatan dan bahan sederhana yang dapat diperoleh dengan mudah di pasaran, yang dapat dilakukan di SMA dan tentunya disesuaikan dengan kurikulum yang berlaku. Bahan-bahan yang digunakan juga dapat diperoleh dengan mudah di sekitar kita dan harganya juga terjangkau. Dengan adanya modul praktikum ini, diharapkan sekolah-sekolah, khususnya SMA swasta di daerah pinggiran, tetap dapat melaksanakan praktikum kimia di laboratoriumnya. Diharapkan juga para siswa mempunyai pengalaman praktikum di laboratorium sehingga mereka mempunyai bekal saat melanjutkan pendidikan di Perguruan Tinggi. Selain itu, dengan adanya modul praktikum ini, diharapkan pola pikir siswa tentang pelajaran kimia menjadi pelajaran yang menarik karena berbasis ekspermen di Laboratorium.

Co-Authors Abduh Muharram Chairacita Agus Wahyudi Agus Wahyudi Agus Wahyudi Agus Wahyudi Agus Wahyudi Amirotul Ula Anis Febriati Arizal Firmansyah Arizal Firmansyah Arizal Firmansyah Aufa Fadhliah Awalia Wardatil Firdaus Darin Salsabila Didik Prasetyoko Dyah Nirmala Edi, Eduardus Endah Mutiara Endah Mutiara Marhaeni Putri Endah Mutiara Marhaeni Putri Fahima Martak Fahimah Martak Fina Riandra Gunawan, Triyanda Imam B. Sosrowidjojo Januar Kholik Kusuma, Hendra Siswanto M. Nadjib Mujahid M. Rachimoellah Maulida Fitriyyah Miranti Widi Puspita Ayu Nadjib, Muhammad Novesar Jamarun Pusparatu Pusparatu R. Arizal Firmansyah R. Arizal Firmansyah R.Y. Perry Burhan, R.Y. Perry Rafwan Year Perry Burhan Rhiby Ainur Basit Hariyanto Riandra, Fina Riandra, Fina Sosrowidjojo, Imam B. Sosrowidjojo, Imam B. Sovia Masfuri Walidatus Sholihah Sulistiyono Sulistiyono Wahyu Prasetyo Utomo Wahyu Prasetyo Utomo Zein Firdaus Ramadhan Zjahra Vianita Zjahra Vianita Nugraheni Zjahra Vianita Nugraheni

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