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All Journal JURNAL HUTAN LESTARI Alchemy : Journal of Chemistry Transmisi Jurnal Inovasi Pendidikan Kimia Jurnal Dinamika Pendidikan Journal of Mechanical Engineering Science and Technology JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN Journal of Energy, Mechanical, Material and Manufacturing Engineering Jurnal Serambi Engineering Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Barometer Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Jurnal Inovasi Teknik Kimia Sprocket : Journal of Mechanical Engineering International Journal Of Science, Technology & Management (IJSTM) JiTEKH (Jurnal Ilmiah Teknologi Harapan) Chemical Engineering Journal Storage (CEJS) Jurnal Teknologi Kimia Unimal Research In Chemical Engineering KREATIF Jurnal Pengabdian Masyarakat Sains dan Teknologi
Vera Pangni Fahriani
Universitas Singaperbangsa Karawang
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation

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Effectiveness Comparative of The AG-666 Condenser with Re-Design In Producing Distillate for The AT-460 Distillation Tower Feed Kusuma, Daffa Meifan; Yuda, Dimas; Fahriani, Vera Pangni
TRANSMISI Vol. 21 No. 1 (2025): March (2025)
Publisher : Universitas Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v21i1.14479

Abstract

PT. Sintas Kurama Perdana is the only formic acid production plant in Indonesia. The company places high attention on the daily operating conditions of its production process, ensuring that every parameter, such as flow rate, temperature, pressure, and components, is maintained according to the set point. In the production process of methyl formate and formic acid, optimization of operational conditions, especially in the heat exchanger unit, is the main focus. The shell and tube type heat exchanger, specifically with the code AG-666, is used to condense the AT-660 distillate vapor output. This study assesses whether the AG-666 is capable of total condensation without the need for the assistance of the AG-667 condenser in anticipation if the AG-667 does not function. The analysis is carried out based on the clean overall coefficient (Uc), design overall coefficient (Ud), fouling factor (Rd), efficiency, and effectiveness for actual design conditions and re-design. The data owned from the initial design of the survival is the Uc value of 1525 W/m2.K, Rd value of 0.00032 m2.K/W, efficiency of 82%, and effectiveness of 75%. The actual condition of the heat exchanger has a Uc value of 801.71 W/m2.K, Ud value of 104.62 Btu/ft.h.℉, Rd value of 0.000436 m2.K/W, efficiency of 74%, and effectiveness of 50%. Re-Design shows that increasing the number of passes (4 passes in the shell and 8 passes in the tube) allows single-stage condensation at an outlet temperature of 32 °C without non-condensable gases such as CO. Comparison between the initial design and the re-design results shows an increase in efficiency of 80% and effectiveness of 57.78%, with Uc 725.83 W/m2.K and Ud 102.27 Btu/ft.h.℉. The redesign provided better performance than the original design, although actual efficiency was slightly lower.
Analysis And Design Of Heat Exchanger at PT. X For Process Optimization Bagastama, Bima; Alwardah, Chairunnisa; Fahriani, Vera Pangni
TRANSMISI Vol. 21 No. 1 (2025): March (2025)
Publisher : Universitas Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v21i1.15090

Abstract

Heat Exchanger is a device used to transfer heat between fluids to get the temperature operating conditions as needed. This research was conducted to obtain Heat Exchanger design calculations to solve problems and adjust the needs of PT X. The design of the Heat Exchanger is obtained by the Double Pipe Heat Exchanger type with a heat transfer area of 7.37 ft2. The hot fluid, Condensate Steam, will fill the inner pipe while the cold fluid in the form of refrigerant water will fill the annulus pipe. Superheated steam has a temperature higher than its boiling point at the same pressure. Steam condensate is steam that has cooled and condensed back into water after being used to do work or after losing heat.The length and number of hairpin heat exchangers are 10 ft and 1 hairpin. The height of the heat exchanger is 30cm. The designed heat exchanger uses turbulence flow type to optimize and streamline heat transfer. The performance and capability of the heat exchanger obtained Overall Dirty Coeficient Heat Transfer (Ud) 250 Btu/hr ft2 oF, Overall Clean Coeficient Heat Transfer (Uc) 558.027 Btu/hr ft2 oF, Fouling Factor (Rd) 0.002. The pressure drop values for both annulus and innerpipe are 0.99 psi and 2.321 psi, which do not exceed the safe limit. The friction values obtained on the innerpipe and annulus are 0.006 and 0.0105.
PENGARUH WAKTU PERENDAMAN SABUT KELAPA DALAM EKSTRAK DAUN JATI MUDA DENGAN FIKSATOR KAPUR TOHOR (CaO) TERHADAP INTENSITAS DAN TAHAN LUNTUR WARNA KAIN PADA PEWARNAAN KAIN KATUN Hanny Dian Kharisma; Vera pangni Fahriani; Aulia Wahyuningtyas
Jurnal Inovasi Teknik Kimia Vol. 10 No. 1 (2025)
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v10i1.12556

Abstract

“Penggunaan pewarna alami pada tekstil dapat ditingkatkan dengan memanfaatkan sumber daya alam seperti daun jati muda dan sabut kelapa, sehingga juga dapat meminimalkan penggunaan pewarna sintetis yang dapat membahayakan kesehatan manusia dan lingkungan. dari penelitian ini adalah untuk mengetahui bagaimana pengaruh perendaman sabutkelapa dalam ekstrak daun jati muda terhadap intensitas warna dan ketahanan luntur warna kain katun setelah dicuci dengan sabun, serta pengaruh kapur tohor (CaO) sebagai fiksator terhadap intensitas warna dan daya tahan luntur warna kain katun yang telah dicuci dengan sabun. Penelitian ini meliputi beberapa tahapan. Pertama, daun jati muda diekstraksi dengan teknik perebusan dengan perbandingan 1 kilogram per 10 liter, menggunakan air sebagai pelarut dan memanaskan campuran pada suhu 100°C selama 30 menit. Kedua, merendam sabut kelapa selama 24 atau 48 jam pada ekstrak daun jati muda. Ketiga, cara mencelupkan kain pada ekstrak daun jati muda dengan merendamnya selama 24, 48, dan tidak direndam sama sekali. Keemepat, proses fiksasi menggunakan kapur tohor (CaO) 10gr/1liter air. Kelima, proses pengujian intensitas warna menggunakan spektrofotometer UV-Vis 2401 PC dan pengujian tahan luntur warna terhadap pencucian menggunakan sabun menggunakan grey schale. Hasil penelitian ini menunjukan bahwa sampel tanpa perlakuan perendaman menunjukan intensitas warna yang lebih rendah dengan nilai R% (9,45) dibandingkan dengan sampel pada perendaman selama 24 dengan nilai R% (18,24)) dan 48 jam dengan nilai R% (24,06). Pada pengujian tahan luntur warna ketiganya memiliki nilai luntur warna yang cukup baik dengan nilai (4-5). Pada perlakuan pemberian fiksator dapat mempengaruhi intensitas warna menjadi lebih tinggi sehingga warna yang dihasilkan menjadi lebih cerah, baik pada perendaman menggunakan sabut kelapa maupun tanpa perendaman. Sampel dengan fiksator dan tanpa perendaman memiliki nilai R% yang lebih rendah (26) dibandingankan sampel dengan fiksator dan perendaman selama 24 jam memiliki nilai R% ( 62,38), sampel dengan fiksator dan perendaman selama 48 jam memiliki nilai R% (72,11).
ENHANCING CORROSION RESISTANCE: A COMPREHENSIVE STUDY ON STAINLESS STEEL AISI 304 Alifah, Farkha Nur; Fahriani, Vera Pangni
Jurnal Dinamika Vokasional Teknik Mesin Vol. 10 No. 1 (2025)
Publisher : Department of Mechanical Engineering Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/dinamika.v10i1.77644

Abstract

The selection of metal as a construction material used for the industrial world is an important factor that is in accordance with industrial provisions. Corrosion is a factor that must be considered due to the corrosion impact of damage can cause losses in various aspects. AISI 304 stainless steel is one of the stainless steel materials that is resistant to corrosion so that it is widely used in several industries. The corrosion protection in AISI 304 stainless steel has to be carried out with the method of using corrosion inhibitors and protective coatings so that it can reduce damage and extend the life of the AISI 304 stainless steel metal material. Electrochemistry and weight loss methods are used in testing so that the corrosion rate of AISI 304 stainless steel material can be known in various temperature, salinity, and electrolyte solution. The results of temperature variations show that the corrosion rate decreases with increasing temperature and immersion time. The results showed that the higher salinity level of the water media produced the higher the corrosion rate. In the variation of electrolyte solution, the best corrosion resistance of AISI 304 stainless steel occurs in electrolyte solutions with low concentrations. In addition, the mechanical loading study indicates that the magnitude of the loading causes the corrosion rate to increase. In this case, to inhibit corrosion by considering temperature factors, water salinity media environment, chemical substances around the material, and mechanical loads, it is important to carry out corrosion protection in order to slow down the corrosion rate so that it is more effective in its application, minimize damage and loss and extend the life of the AISI 304 stainless steel metal material used sector, the selection of metal as a construction material used for the industrial world is an important factor that is in accordance with industrial provisions. Corrosion is a factor that must be considered because the impact of damage due to corrosion can cause losses in various aspects. The construction material in the industry that is widely used is stainless steel. AISI 304 stainless steel is one of the stainless steel materials that is resistant to corrosion so that it is widely used in several industries. In AISI 304 stainless steel, corrosion protection needs to be carried out with the method of using corrosion inhibitors and protective coatings so that it can reduce damage and extend the life of the AISI 304 stainless steel metal material. The literature study used is a compilation method supported by data collection from various published journals. Electrochemistry and weight loss methods are used in testing so that the corrosion rate of AISI 304 stainless steel material can be known in various conditions and provide knowledge related to how research on AISI 304 stainless steel protection against corrosion can be applied effectively in reducing damage so that it slows down the corrosion rate of AISI 304 stainless steel.
Sifat Fisik Biofoam dari Pati Jagung: Alternatif Styrofoam Konvensional Ramah Lingkungan Ahmad, Fayzah; Fahriani, Vera Pangni; Yuliasari, Fitri; Sinaga, Angelita Sendi; Al-Qordhiyah, Zulaikha
ALCHEMY:Journal of Chemistry Vol 13, No 1 (2025): ALCHEMY: JOURNAL OF CHEMISTRY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/al.v13i1.36477

Abstract

Biodegradable foam adalah kemasan ramah lingkungan pengganti styrofoam, dibuat dari pati alami yang diperkuat serat untuk menambah kekuatan. Penelitian ini bertujuan mengkaji sifat fisik biofoam berbahan dasar pati jagung dengan tambahan serat kulit kacang tanah sebagai pengganti styrofoam konvensional. Biofoam diproduksi menggunakan metode baking process dengan variasi suhu pencetakan 120°C, 140°C dan 160°C. Pengujian meliputi daya serap air, kadar air, kebocoran, dan tingkat biodegradasi. Hasil pengujian menunjukkan bahwa daya serap air yang berada dalam rentang SNI yaitu 3,646% di suhu 160°C. Uji kadar air sebesar 6,667% di suhu 160°C yang telah memenuhi SNI yang menandakan biofoam memiliki kelembapan yang sesuai untuk kemasan makanan. Uji kebocoran menunjukkan biofoam memiliki ketahanan yang cukup baik terhadap rembesan air setelah 7 hari di suhu 160°C. Pada uji biodegradable terbukti dapat terurai secara alami selama 49 hari di suhu 140°C dan 160°C. Secara keseluruhan, biofoam dari pati jagung dan serat kulit kacang tanah memiliki potensi sebagai kemasan ramah lingkungan.
Studi Baja Karbon Rendah Terhadap Laju Korosi Kusumawati, Erna Dwi; Fahriani, Vera Pangni
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 5 No 2 (2024): Edisi Februari 2024
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36655/sprocket.v5i2.1265

Abstract

Korosi merupakan masalah yang serius dalam bahan logam, korosi dapat dikatakan terjadinya penurunan kualitas logam akibat reaksi kimia dengan lingkungannya terutama melalui proses elektrokimia yang melibatkan anoda, katoda, dan elektrolit. Korosi dapat merugikan secara teknis, dan mengurangi sifat logam mekanis ini terjadi pada berbagai jenis dalam konstruksi, kendaraan, hingga peralatan elektronik hal ini dikarenakan oleh faktor lingkungan seperti lingkungan asam yang dapat mempercepat korosi. Perlindungan korosi terhadap baja karbon rendah sangat penting dengan menggunakan metode perlindungan termasuk pelapisan permukaan, penggunaan inhibitor korosi. Studi ini menggunakan metode literatur dengan mengumpulkan data dari berbagai jurnal yang telah dipublikasikan. Penelitian dilakukan menggunakan elektrokimia dan uji berat hilang untuk memahami perilaku korosi baja kerbon rendah dalam berbagai kondisi, dan memberikan wawasan mengenai bagaimana melakukan penelitian ilmiah terkait dengan sifat dan perlindungan logam terhadap korosi. Sehingga perlindungan korosi pada baja karbon rendah perlu diterapkan secara efektif untuk mengurangi kerusakan dan memperpanjang umur produk logam tersebut.
KARAKTERISASI SIFAT FISIK BIOFOAM BERBASIS PATI SAGU (METROXYLON SAGU) YANG DIPERKUAT DENGAN SERAT KULIT KACANG TANAH SEBAGAI ALTERNATIF BIODEGRADABLE TERHADAP STYROFOAM KONVENSIONAL Angelita Sendi Sinaga; Vera Pangni Fahriani; Fitri Yuliasari; Zulaikha Al-Qordhiyah; Fayzah Ahmad
Chemical Engineering Journal Storage (CEJS) Vol. 5 No. 06 (2025): Chemical Engineering Journal Storage (CEJS)-December 2025
Publisher : LPPM Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/cejs.v5i06.24797

Abstract

Sifat sekali pakai dari styrofoam menimbulkan risiko lingkungan yang signifikan karena ketahanannya terhadap degradasi serta pelepasan partikel mikroplastik saat dibakar. Penelitian ini bertujuan untuk mengembangkan biofoam berbasis pati sagu sebagai alternatif biodegradable terhadap styrofoam konvensional. Biofoam diproduksi melalui proses pemanasan dan pemadatan pada berbagai variasi suhu untuk mengevaluasi pengaruhnya terhadap sifat fisik dan daya urai. Hasil menunjukkan bahwa semua variasi suhu menghasilkan biofoam yang terurai sepenuhnya dalam waktu 60 hari, memenuhi standar biodegradabilitas yang ditetapkan oleh Standar Nasional Indonesia (SNI). Namun, hanya sampel yang diproses pada suhu 140°C dan 160°C yang memenuhi standar daya serap air, dengan nilai berkisar antara 6% hingga 26,12%. Suhu optimal diidentifikasi pada 160°C, yang menghasilkan biofoam dengan ketahanan terbaik terhadap kelembapan dan kebocoran. Temuan ini menekankan pentingnya pengendalian suhu dalam proses produksi untuk mencapai performa fisik yang optimal. Biofoam berbasis pati sagu menunjukkan potensi yang kuat sebagai solusi ramah lingkungan dan berkelanjutan untuk aplikasi kemasan.
Physical Properties of Biofoam from Cassava Starch: An Environmentally Friendly Alternative to Conventional Styrofoam Zulaikha Al-Qordhiyah; Vera Pangni Fahriani; Fitri Yuliasari; Fayzah Ahmad; Angelita Sendi Sinaga
Research in Chemical Engineering Vol. 5 No. 1 (2026): Research in Chemical Engineering
Publisher : Universitas Muhammadiyah Purwokerto

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

Abstract

A study has been conducted on the manufacture of biofoam from cassava starch extract with the addition of peanut shell powder. There were 3 samples made in this study by heating using an oven (120°C, 140°C, 160°C) with the addition of magnesium stearate and ZnO. The quality characteristics of the synthesized biofoam were tested through water absorption tests, water content tests, leakage tests and biodegradable tests. The results of the water absorption test analysis obtained the percentage of each sample of 17.409%, 12.081%, and 4.049%. From these results, the temperature of 160°C which meets the SNI standard is 11.8682%. In the water content test, the percentage of each sample was 30.290%, 15.884%, and 9.615%. From these results, it has met the SNI standard of 26.12% except at a temperature of 120°C. In the leakage test, the results were obtained in the form of leaking samples on days 1, 2, and 4. In the biodegradable test, the percentage of each sample decomposed was 96%, 97%, and 100%, in the seventh week. Based on the biodegradable test, all samples can decompose well in a relatively fast time span and meet SNI, which is 100% for 60 days.
Co-Authors Agustian Suseno Ahmad, Fayzah Al-Qordhiyah, Zulaikha Alifah, Farkha Nur Alwardah, Chairunnisa Alya, Neng Via Nurjanahtul Angelita Sendi Sinaga Angelita Sendi Sinaga Anwari, Luluatun Apid Hapid Maksum Aripin Aripin Aulia Wahyuningtyas Bagastama, Bima Bunga Nurkhalifah Darmanto, Prihadi Setyo Dessy Agustina Sari Elvandari, Milliyantri Enjang Ahmad Juanda Enjang Akhmad Juanda Fadzrin, Al Ghifary Marendra Fayzah Ahmad Fayzah Ahmad Fitri Yuliasari Fitri Yuliasari František Hrdlička Hanny Dian Kharisma Hrdlička, František Ismi Ari Fitria Iwan Nugraha Gusniar Kusuma, Daffa Meifan Kusumawati, Erna Dwi M. Djaeni Marchanda Rahmawati Martin Muhammad Fahmi Hakim Nahadi Pertiwi, Suciani Rahma Prihadi Setyo Darmanto Rahmat Hidayat Reza Setiawan Rieval Ade Putra Rikky Rifaldy Rizki Achmad Darajatun Rusman Rusman Sarah Dampang Sinaga, Angelita Sendi Siti Nurhayati Suciani Rahma Pertiwi Sugeng Riyadi Surya Ma’rufi Fajar Sutrisno Wahyuningtyas, Aulia Wawan Wahyu Yuda, Dimas YULIASARI, FITRI Zulaikha Al-Qordhiyah Zulaikha Al-Qordhiyah