JURNAL TEKNIK KIMIA VOKASIONAL (JIMSI)
https://ejurnal.polnes.ac.id/index.php/jimsi
<p align="justify"><strong>JURNAL TEKNIK KIMIA VOKASIONAL (JIMSI)</strong> is<strong> </strong>an open-access and peer-reviewed journal which is published by Department of Chemical Engineering Politeknik Negeri Samarinda, East Kalimantan publishes biannually in March and September with registered number <strong>ISSN 2775-9083</strong> (Print) and <strong>2775-9075</strong> (Online). This Journal publishes current original research on Chemical Engineering and Chemistry, especially on catalysts, biofuel, petro and oleo, and environment. <strong>JIMSI</strong> invites lectures, researchers, examiners, practitioners, industrialists and students to submit their papers or manuscripts. </p> <p align="justify"><strong>The Journal invites contributions to the following two main areas</strong> is applied Chemistry dealing with the application of basic chemical sciences to industry and Chemical Engineering dealing with the chemical and biochemical conversion of raw materials into different products as well as the design and operation of plants and equipment.</p>Department Of Chemical Engineering, Politeknik Negeri Samarindaen-USJURNAL TEKNIK KIMIA VOKASIONAL (JIMSI)2775-9083<h3><strong>Copyright Transfer Statement</strong></h3> <p>The copyright of this article is transferred to JIMSI<em> </em> and when the article is accepted for publication. the authors transfer all and all rights into and to paper including but not limited to all copyrights in the Psikostudia. The author represents and warrants that the original is the original and that he/she is the author of this paper unless the material is clearly identified as the original source, with notification of the permission of the copyright owner if necessary. The author states that he has the authority and authority to make and carry out this task.<br>The author states that:</p> <ol> <li class="show">This paper has not been published in the same form elsewhere.</li> <li class="show">This will not be submitted elsewhere for publication prior to acceptance/rejection by this Journal.</li> </ol> <p>A Copyright permission is obtained for material published elsewhere and who require permission for this reproduction. Furthermore, I / We hereby transfer the unlimited publication rights of the above paper to Jurnal Teknik Kimia Vokasional. Copyright transfer includes exclusive rights to reproduce and distribute articles, including reprints, translations, photographic reproductions, microforms, electronic forms (offline, online), or other similar reproductions.</p> <p>The author's mark is appropriate for and accepts responsibility for releasing this material on behalf of any and all coauthor. This Agreement shall be signed by at least one author who has obtained the consent of the co-author (s) if applicable. After the submission of this agreement is signed by the author concerned, the amendment of the author or in the order of the author listed shall not be accepted.</p> <p>Rights / Terms and Conditions Saved</p> <ol> <li class="show">The author keeps all proprietary rights in every process, procedure, or article creation described in Work.</li> <li class="show">The author may reproduce or permit others to reproduce the work or derivative works for the author's personal use or for the use of the company, provided that the source and the Informatika Mulawarman copyright notice are indicated, the copy is not used in any way implying the Jurnal Psikostudia approval of the product or service from any company, and the copy itself is not offered for sale.</li> <li class="show">Although authors are permitted to reuse all or part of the Works in other works, this does not include granting third-party requests to reprint, republish, or other types of reuse.</li> </ol> <p><a href="http://creativecommons.org/licenses/by-sa/4.0/" rel="license"><img src="https://i.creativecommons.org/l/by-sa/4.0/88x31.png" alt="Creative Commons License"></a></p> <p>Jurnal Teknik Kimia Vokasional by <a href="http://e-journal.polnes.ac.id/index.php/jimsi">http://ejurnal.polnes.ac.id/index.php/jimsi</a> licensed under a <a href="http://creativecommons.org/licenses/by-sa/4.0/" rel="license">Creative Commons Attribution-ShareAlike 4.0 International License</a>.</p>Adsorpsi Zat Warna Methylene Blue Dengan Menggunakan Karbon Aktif Dari Gambut Fibrik
https://ejurnal.polnes.ac.id/index.php/jimsi/article/view/1320
<p>Salah satu zat warna yang digunakan pada industri tekstil yang sangat penting dan relatif murah adalah<em> methylene blue</em> karena mudah larut dalam air. Dampak negatif dari zat warna <em>methylene blue</em> dapat mempengaruhi lingkungan. Salah satu metode yang digunakan adalah adsorpsi menggunakan arang aktif yang berbahan dasar gambut fibrik. Tujuan dari penelitian ini adalah untuk mengatahui variasi waktu kontak antara karbon aktif yang terbuat dari tanah gambut dengan zat warna tekstil <em>methylene blue</em> terhadap penurunan konsentrasi zat warna <em>methylene blue</em>. Arang aktif dibuat dari gambut fibrik melalui proses pirolisis pada suhu 500C dengan waktu 120 menit dan aktivasi menggunakan H<sub>3</sub>PO<sub>4</sub> 20%. 25 ml larutan <em>methylene blue </em>konsentrasi 75 ppm dikontakkan dengan arang aktif dengan waktu kontak 20, 40, 60, 80, 100, dan 120 menit. Waktu kontak optimum yang diperoleh pada penelitian ini adalah 60 menit dengan efisiensi adsorpsi sebesar 99,67% dan kapasitas adsorpsi sebesar 3,7377 mg/g. Model adsorpsi isoterm yang sesuai pada penelitian ini adalah adsorpsi isoterm langmuir dengan nilai R<sup>2</sup> sebesar 1.</p>Najib Najmi'i Ramadhani
Copyright (c) 2025 JURNAL TEKNIK KIMIA VOKASIONAL (JIMSI)
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2025-12-172025-12-1752566110.46964/jimsi.v5i2.1320Pengaruh Rasio Mol dan Waktu dalam Proses Transesterifikasi Minyak Jelantah Menjadi Biodiesel dengan Katalis CaO/K2O dari Cangkang Telur Ayam
https://ejurnal.polnes.ac.id/index.php/jimsi/article/view/1326
<p><strong> </strong></p> <p>Minyak bumi, sumber energi utama dan devisa negara kita, semakin menipis. Fosil khususnya minyak bumi, merupakan sumber energi utama yang memiliki cadangan terbatas. Oleh karena itu, diperlukan energi alternatif seperti biodiesel untuk memastikan keberlangsungan energi. Salah satu bahan baku yang dapat digunakan dalam pembuatan biodiesel adalah minyak jelantah. katalis padat CaO/K<sub>2</sub>O adalah katalis yang dapat digunakan untuk meningkatkan laju reaksi karena aktifitas katalitik nya sangat baik, sehingga proses transesterifikasi dapat berhasil menghasilkan biodiesel. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh waktu reaksi dan rasio mol antara minyak jelantah dengan metanol pada pembuatan biodiesel berdasarkan standar SNI 7182:2015. Katalis dibuat dengan mengkalsinasikan cangkang telur ayam pada suhu 900 °C selama 3 jam, kemudian di impregnasi dengan KOH dan di kalsinasikan pada suhu 500 °C selama 5 jam. Proses transesterifikasi dilakukan dengan cara mereaksikan minyak jelantah dan metanol dengan perbandingan rasio mol 1:12 dan 1:15 dan variasi waktu 120, 150, 180 menit dari 100 gr minyak jelantah. Hasil biodiesel terbaik diperoleh pada variasi waktu 180 menit dengan perbandingan rasio minyak jelantah : metanol 1:12 dengan densitas 913,7 kg/m3, viskositas 2,60 cSt, % rendemen sebesar 71%, dan kadar metil ester 99,79% telah memenuhi Standar Nasional Indonesia (SNI 7182:2015) kecuali pada berat jenis.</p> <p> </p>Muhammad fadlansyah
Copyright (c) 2025 JURNAL TEKNIK KIMIA VOKASIONAL (JIMSI)
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2025-12-172025-12-1752465510.46964/jimsi.v5i2.1326The Effect of Zinc Chloride (ZnCl₂) Activator Concentration on the Production of Activated Carbon from Oil Palm Shell (Elaeis Guineensis) Using the Pyrolysis Method
https://ejurnal.polnes.ac.id/index.php/jimsi/article/view/1503
<p>Cangkang kelapa sawit adalah bagian produk samping atau limbah yang dihasilkan dalam proses pengolahan tandan buah segar (TBS) yang mengandung beberapa senyawa seperti lignin,selulosa dan hemiselulosa. Cangkang kelapa sawit seringkali dihasilkan dalam jumlah yang cukup besar sebagai hasil samping dari industri kelapa sawit dan biasanya digunakan untuk bahan bakar boiler sebagai alternatif penggunaan batubara. Penelitian ini bertujuan menganalisis pengaruh variasi konsentrasi seng klorida (ZnCl₂) sebagai aktivator terhadap karakteristik karbon aktif hasil pirolisis cangkang kelapa sawit berdasarkan parameter mutu dalam SNI 06-3730-1995. Karbon aktif dari cangkang kelapa sawit di peroleh dengan proses pirolisis oksidasi parsial selama 1,5 jam dengan temperatur pirolisis 350°C dan diaktivasi dengan larutan ZnCl<sub>2</sub>, kemudian aktivasi fisika pada temperatur 750°C selama 3 jam. Penentuan kualitas karbon aktif dilakukan dengan variasi konsentrasi aktivator ZnCl<sub>2</sub> yaitu 5%,10%,15%,20% dan 25% dengan waktu perendaman selama 24 jam pada masing masing larutan sebanyak 25ml dan massa karbon aktif sebesar 10g. Di peroleh hasil terbaik pada konsentrasi 20% yaitu menghasilkan nilai kadar air 2,84%, kadar abu 7,98%, kadar zat menguap 11,36%, <em>fixed carbon </em>77,83% dan daya serap iod sebesar 801,653mg/g.</p>Muhammad Idham Kasbi Samara Idam Kasbi
Copyright (c) 2025 JURNAL TEKNIK KIMIA VOKASIONAL (JIMSI)
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2025-12-172025-12-1752384510.46964/jimsi.v5i2.1503ANALISIS DAYA SIMPAN TERHADAP KARAKTERISTIK MIE BASAH DENGAN PENAMBAHAN SERBUK DAUN KARAMUNTING (Rhodomyrtus tomentosa)
https://ejurnal.polnes.ac.id/index.php/jimsi/article/view/1801
<p><em>Karamunting (Rhodomyrtus tomentosa) is a wild plant that grows in tropical areas. </em><em>Karamunting leaves contain secondary metabolite compounds such as flavonoids, saponins, quinones, tannins, steroids, hexasoic acid, gallic acid and glycosides which act as antioxidants and antibacterials so that they are used as natural preservatives. Preservatives can extend the shelf life of wet noodles. This study aims to determine the shelf life of wet noodles with the addition of karamunting leaf powder. In this study, karamunting leaves are dried to obtain karamunting leaf flour. Wet noodles are made from a ratio of wheat flour and karamunting leaf flour of 285 grams:15 grams and variations in storage time of 0 hours, 6 hours, 12 hours, 24 hours, 30 hours, 36 hours and 48 hours. Wet noodles are tested for their characteristics with parameters of moisture content, total microbes and organoleptic tests. The results showed that the storage time had an effect on the characteristics of wet noodles substituted with karamunting leaf flour. The lowest moisture content was found at 0 hours at 61.43% and the highest moisture content at 48 hours was 64.39%.The lowest microbial total at 0 hours was 2.30 x 104 colonies/gram and the highest microbial total at 48 hours was 5.27 x 105 colonies/gram. The average level of preference of the panelists liked the wet noodles substituted with karamunting leaves at a storage time of 36 hours.</em></p>Elis Diana Ulfa
Copyright (c) 2025 JURNAL TEKNIK KIMIA VOKASIONAL (JIMSI)
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2025-12-172025-12-1752626910.46964/jimsi.v5i2.1801PENCEGAHAN KENDALA DALAM TRANSFER PRODUCED WATER NILAM KE BADAK DENGAN SIMULASI & ANALISIS PENGGANTIAN PIPA 12” HDPE MENJADI PIPA 6” CS
https://ejurnal.polnes.ac.id/index.php/jimsi/article/view/1803
<p><em>Produced water is the main liquid waste in the oil and gas production process that must be safely transferred to the processing facility. The current produced water transfer system in the Nilam Field uses 12” HDPE pipes, but this material has limitations in terms of high pressure and potential deformation. This study aims to analyze the technical feasibility of replacing 12” HDPE pipes with 6” carbon steel (CS) pipes through hydraulic simulations using Aspen HYSYS and further calculations using Microsoft Excel. The main variables analyzed include pressure drop, flow velocity, and the maximum limit of the replacement pipe length that is still operationally safe. The simulation results show that the pressure drop of 6” pipes is greater than that of 12” pipes, so an evaluation of the maximum length of the pipe that can be replaced is necessary. The analysis results show that 12” pipes can only be replaced with 6” CS pipes with a maximum length of 2,025.97 meters, before the pressure drop and pressure surge exceed the operational safety limit. Thus, pipe replacement can only be done partially and it is not recommended to replace the entire existing pipeline.</em></p>Ibnu Eka Rahayu
Copyright (c) 2025 JURNAL TEKNIK KIMIA VOKASIONAL (JIMSI)
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2025-12-172025-12-1752707610.46964/jimsi.v5i2.1803