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All Journal Jurnal Ilmiah Widya PENELITIAN DAN KARYA ILMIAH JOURNAL OF EARTH ENERGY ENGINEERING Agroindustrial Technology Journal Jurnal Teknik Barometer Jurnal Fisika : Fisika Sains dan Aplikasinya Jurnal Sains Teknologi dalam Pemberdayaan Masyarakat Jurnal Jaring SainTek JURNAL PENELITIAN DAN KARYA ILMIAH LEMBAGA PENELITIAN UNIVERSITAS TRISAKTI Bhara Petro Energi Journal of Engineering Environtmental Energy and Science International Journal of Advanced Multidisciplinary Jurnal Penelitian dan Karya Ilmiah Lembaga Penelitian Universitas Trisakti
Widodo, Hernowo
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STUDI KINETIKA REAKSI METIL ASETAT DARI ASAM ASETAT DAN METHANOL DENGAN VARIABEL WAKTU, KONSENTRASI KATALIS DAN PERBANDINGAN REAKTAN Widodo, Hernowo
Jurnal Ilmiah Widya Vol 4 No 3 (2018)
Publisher : Lembaga Layanan Pendidikan Tinggi Wilayah III Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1222.989 KB)

Abstract

Abstrak: Metil asetat (CH 3 COOCH 3 ), juga disebut asam asetat metil ester atau metil etanoat, milik kelompok ester. Dalam industrikimia, metil asetat banyak digunakan sebagai pelarut organik atau solvent serta sebagian besar untuk minyak dan lemak. Dalam industriberbasis teknik kimia, reaksi dan pemisahan dapat dilakukan bersamaan dalam satu alat dengan distilasi. Tujuan dari penelitian iniadalah proses esterifikasi asam asetat dan methanol menghasilkan asam asetat dan air. Dengan menggunakan metode distilasi. Percobaandilakukan menggunakan variabel berubah, yaitu waktu (60, 90, 120, 150 menit), konsentrasi katalis HCl (0,1, 0,2, 0,3 M) danperbandingan reaktan asam asetat: methanol (1:6, 1:8, 1:9). Dari percobaan diperoleh rendemen optimum sebesar 95,5 % pada waktu150 menit dengan perbandingan asam asetat : methanol (1:8) dan konsentrasi katalis HCl 0,1 M. Reaksi antara asam asetat dan methanolmerupakan reaksi berorde dua. Nilai konstanta kecepatan reaksi (k) yang tertinggi, dengan nilai k = 2.4589/mol.menit didapat dariperbandingan asam asetat: methanol (1:8) pada konsentrasi HCl 0,1 M. Hasil analisis karakter ikatan yang diperoleh dari spektra FTIRmetil asetat yaitu ikatan C = O, C – O, C – O – C dan gugus C – H.Kata kunci: metil asetat, esterifikasi, distilasi, orde reaksi, kostanta kecepatan reaksi.Abstract: Methyl acetate (CH 3 COOCH 3 ), also called acetic acid methyl ester or methyl ethanoate, belonging to the ester group. In thechemical industry, the methyl acetate is widely used as an organic solvent or solvent as well as most of the oil and grease. In chemicalengineering based industries, reaction and separation can be carried out simultaneously in a single appliance by distillation. Thepurpose of this research is the process of esterification of acetic acid and methanol to produce acetic acid and water. By using themethod of distillation. The experiments were performed using a variable changes, the time (60, 90, 120, 150 minutes), the catalystconcentration HCl (0.1, 0.2, 0.3 M) and the ratio of reactants acetic acid: methanol (1: 6, 1: 8, 1: 9). From the experiments obtainedoptimum yield of 95.5% at the time of 150 minutes with a ratio of acetic acid: methanol (1: 8) and 0.1 M HCl catalyst concentration,reaction between acetic acid and methanol is a reaction of order two. Value of the reaction rate constant (k) is the highest, with a valueof k = 2.4589 / mol.menit obtained from the comparison of acetic acid: methanol (1: 8) at a concentration of 0.1 M HCl bond characteranalysis results obtained from the FTIR spectra of methyl acetate namely the C = O, C ­ O, C ­ O ­ C and group C ­ H.Keywords: methyl acetate, esterification, distillation, reaction order, rate constants of reactions.
STUDI KINETIKA REAKSI METIL ASETAT DARI ASAM ASETAT DAN METHANOL DENGAN VARIABEL WAKTU, KONSENTRASI KATALIS DAN PERBANDINGAN REAKTAN Widodo, Hernowo; Maesaroh, Elsa
Jurnal Ilmiah Widya Vol 4 No 3 (2018)
Publisher : Lembaga Layanan Pendidikan Tinggi Wilayah III Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1222.989 KB)

Abstract

ABSTRAK: Metil asetat (CH3COOCH3), juga disebut asam asetat metil ester atau metil etanoat, milik kelompok ester. Dalam industri kimia, metil asetat banyak digunakan sebagai pelarut organik atau solvent serta sebagian besar untuk minyak dan lemak. Dalam industri berbasis teknik kimia, reaksi dan pemisahan dapat dilakukan bersamaan dalam satu alat dengan distilasi. Tujuan dari penelitian ini adalah proses esterifikasi asam asetat dan methanol menghasilkan asam asetat dan air. Dengan menggunakan metode distilasi. Percobaan dilakukan menggunakan variabel berubah, yaitu waktu (60, 90, 120, 150 menit), konsentrasi katalis HCl (0,1, 0,2, 0,3 M) dan perbandingan reaktan asam asetat: methanol (1:6, 1:8, 1:9). Dari percobaan diperoleh rendemen optimum sebesar 95,5 % pada waktu 150 menit dengan perbandingan asam asetat : methanol (1:8) dan konsentrasi katalis HCl 0,1 M. Reaksi antara asam asetat dan methanol merupakan reaksi berorde dua. Nilai konstanta kecepatan reaksi (k) yang tertinggi, dengan nilai k = 2.4589/mol.menit didapat dari perbandingan asam asetat: methanol (1:8) pada konsentrasi HCl 0,1 M. Hasil analisis karakter ikatan yang diperoleh dari spektra FTIR metil asetat yaitu ikatan C = O, C – O, C – O – C dan gugus C – H.Kata kunci: metil asetat, esterifikasi, distilasi, orde reaksi, kostanta kecepatan reaksi. ABSTRACT: Methyl acetate (CH3COOCH3), also called acetic acid methyl ester or methyl ethanoate, belonging to the ester group. In the chemical industry, the methyl acetate is widely used as an organic solvent or solvent as well as most of the oil and grease. In chemical engineering based industries, reaction and separation can be carried out simultaneously in a single appliance by distillation. The purpose of this research is the process of esterification of acetic acid and methanol to produce acetic acid and water. By using the method of distillation. The experiments were performed using a variable changes, the time (60, 90, 120, 150 minutes), the catalyst concentration HCl (0.1, 0.2, 0.3 M) and the ratio of reactants acetic acid: methanol (1: 6, 1: 8, 1: 9). From the experiments obtained optimum yield of 95.5% at the time of 150 minutes with a ratio of acetic acid: methanol (1: 8) and 0.1 M HCl catalyst concentration, reaction between acetic acid and methanol is a reaction of order two. Value of the reaction rate constant (k) is the highest, with a value of k = 2.4589 / mol.menit obtained from the comparison of acetic acid: methanol (1: 8) at a concentration of 0.1 M HCl bond character analysis results obtained from the FTIR spectra of methyl acetate namely the C = O, C - O, C - O - C and group C - H.Keywords: methyl acetate, esterification, distillation, reaction order, rate constants of reactions.
Pengaruh Pelarut Metanol terhadap Alumunium sebagai Wadah Obat Salep Mata Widodo, Hernowo; Warta, Joni; Ulfah, Maria; Annisa, Amaliah
Jurnal Jaring SainTek Vol. 1 No. 2 (2019): Oktober 2019
Publisher : Fakultas Teknik, Universitas Bhayangkara Jakarta Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31599/jaring-saintek.v1i2.176

Abstract

Corrosion is a decrease in the quality of a material or metal due to electrolyte reactions in the environment that affect the life of the material. Corrosion rate is the speed of propagation or speed of decline in the quality of a material with time. Corrosion processes occur in acidic environments, sea water, rain water, and soil are the result of chemical reactions that are also caused by electrochemical processes. The purpose of this study is to determine the corrosion resistance of aluminum metal to variations in the solution of Methanol (CH3OH). This study uses aluminum plates that will be immersed 5 days with a solution of Methanol (CH3OH). How to collect data by testing the Scanning Electron Microscopy (SEM) on each aluminum plate specimen that has been treated with corrosion by heating at a temperature of 60 oC. Methanol solution is one of the factors causing corrosion of metals. If in the free environment, air, temperature, and acidic substances are most commonly found as a factor causing corrosion. The increased corrosion rate is due to the higher concentration of the cause of corrosion. In this discussion Methanol as the concentration used, and aluminum as the metal tested.
Studi Pengaruh Jenis Katalis, Waktu Reaksi dan Penurunan Bilangan IODINE pada Pembuatan Cocoa Butter Substitute dengan Proses Hidrogenasi Minyak Kelapa Widodo, Hernowo; Adhani, Lisa; Kustiyah, Elvi; Santoso, Ilham
Jurnal Jaring SainTek Vol. 1 No. 1 (2019): April 2019
Publisher : Fakultas Teknik, Universitas Bhayangkara Jakarta Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31599/jaring-saintek.v1i1.183

Abstract

Vegetable fat can be used as a base for making chocolate butter substitutes in making chocolate coatings. The product is also called hard butter can be obtained using coconut oil. The fats used as a substitute for cocoa butter are coconut oil, palm oil and palm kernel oil that have been obtained by hydrogenation, the hydrogenation process is used to reduce iodine numbers to obtain oil in the form of plastic solids and to increase the consistency of oils and fats to reduce color and smell and to improve stability. In this study the hydrogenation reaction of coconut oil experienced an increase in speed when the commercial catalyst composition of Pricat 9910 was added with a 0.75 gram nickel catalyst and 0.75 grams of silica which was characterized by a drastic decrease in iodine number from 12.12 to 1.94 gr I2 / 100 gr example in the reaction time of 8 hours, It contained in hydrogenated coconut oil did not change or damage when the catalyst composition used in the hydrogenation process is increased.
Ekstraksi Protein dari Rhodophyta dan Chlorophyta Dari Perairan Pulau Pari Sebagai Alternatif Antioksidant Kustiyah, Elvi; Saingin, Bungaran; Widodo, Hernowo; Piti, Viriya
Jurnal Jaring SainTek Vol. 1 No. 1 (2019): April 2019
Publisher : Fakultas Teknik, Universitas Bhayangkara Jakarta Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31599/jaring-saintek.v1i1.186

Abstract

Indonesia has millions island and big part of Indonesia is sea that is rich in marine biological resources and has the potential to be developed and optimized. One of the abundant marine resources in Indonesia is algae. Algae are plant-like protists. Algae have several important compounds, including protein, carbohydrates, fats, minerals and other useful elements. Proteins contained in algae have the potential to be used as antioxidants. In this study, the levels of protein in red and green algae were tested by using the lowry method and testing the antioxidant activity of red and green algae extracts using the Diphenylpicrylhydrazyl (DPPH) method. Algae extraction was done by maceration, which is soaking the sample in low temperature with phosphate buffer saline (PBS) pH 7. From the extraction results it can be concluded that the red algae (Rhodophyta) has the highest protein content of 5.115 ± 0.126% and the lowest protein content in green algae (Chloropytha) as big as 1.686 ± 0.430%. And from the results of the antioxidant activity test showed that all positive algae showed antioxidant activity but the green algae (Chlorophyta) had the highest antioxidant activity of 71.5946 ± 0.01612% with IC50 value 1.6114.
Pengaruh Suhu pada Inhibitor Daun Pandan Terhadap Laju Korosi pada Baja SS-304 dalam Larutan Asam HCL 0,1M Laras Andria Wardani; Widodo, Hernowo; Lisa Adhani; Everlita Sabrina; Amaliah Annisa
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 20 No 1 (2021): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jt.vol20no1.372

Abstract

Fenomena korosi tidak bisa dihindari dalam penggunaan industri logam, oleh karena itu dibutuhkan inhibitor korosi untuk menghambat laju korosi pada baja. Tujuan penelitian ini adalah mendapatkan inhibitor alami yang efektif menghambat laju korosi. Pada penelitian ini sampel yang dipakai adalah baja tahan karat yang paling sering digunakan dalam kehidupan sehari-hari yaitu SS (Stainless Steel)-304. Beberapa inhibitor organik atau alami yang digunakan dalam penelitian ini adalah daun pandan. Variabel yang digunakan adalah waktu perendaman dan temperatur. Selanjutnya, parameter yang diteliti adalah laju korosi baja dan morfologi pada baja SS-304 dengan menggunakan uji SEM. Hasil penelitian menunjukkan bahwa laju korosi dan morfologi paling baik menggunakan daun pandan dengan suhu 60℃ yang di rendam dengan larutan HCL 0,1 N selama 5 minggu.
Studi Ekstraksi Teh Hitam terhadap Kandungan Tanin untuk Pembuatan Minuman Teh Widodo, Hernowo; Saing, Bungaran; Fhauziah, Eka
Jurnal Jaring SainTek Vol. 3 No. 1 (2021): April 2021
Publisher : Fakultas Teknik, Universitas Bhayangkara Jakarta Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31599/jaring-saintek.v3i1.326

Abstract

Pada penelitian ini telah dilakuan tentang pengaruh temperatur, waktu, dan kecepatan pengadukan pada proses ekstraksi teh hitam. Suhu yang di gunakan pada penelitian ini yaitu 600 C - 70oC. Sedangakan rentang waktu yang di gunakan yaitu berkisar 10-30 menit dengan beda waktu 30detik. Dan dengan kecepatan pengadukan yaitu 100 rpm, hasil ekstraksi dengan di dapat 9 kadar tannin. Kadar tannin tertinggi di dapat dari ekstraksi dengan temperature 750C, waktu 7 menit, dan kecepatan pengadukan yaitu 430 rpm. Dari kadar tannin yamg terbaik di lakukan pengujian kembali denganmenggunakan spektrofotometeruv-vis.Dan di dapat nilai absorbansi terbesar yaitu 0,381 dengan kadar tannin 582,4 %.
Laboratory Analysis Using Coconut Shell from Bekasi Regency for Drilling Mud Additives on Oil and Gas Wells Hernowo Widodo; Mohammad Riyadi Setyarto; Andhy Andhy; Mohamad Prastya; Amaliah Annisa
Journal of Earth Energy Engineering Vol. 9 No. 1 (2020): APRIL
Publisher : Universitas Islam Riau (UIR) Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jeee.2020.3975

Abstract

Drilling activity in deep formation usually gave greater challenges to the engineer due to its high pressure and temperature. To minimize this problem, drilling mud needs to be modified into a certain condition where it should be performed well in those extreme situations. The drilling mud quality does not significantly decrease, it simply requires better quality of mud at certain points at high temperatures. Certain additives are needed to maintain their performance. Therefore, this study aims to improve the quality of drilling mud by adding additives from carbon powder originating from coconut shells. Coconut shells are burned and processed until they become nanometer-sized, then used as additives in drilling mud. Then, several analyses such as XRD, SEM, as well as the rheology of drilling mud are evaluated. XRD analysis result shows the element from the coconut shell powder was graphite. Laboratory analysis results indicate that drilling mud with coconut shell powder provides better rheological value compared to the same drilling mud without the additives. It was observed that the mud with coconut shell powder performed better at high pressure.
Edukasi Menanggulangi Pandemi Covid-19 Berbasis Komuniti untuk Mewujudkan Kekuatan Pentahelix Lisa Adhani; Bungaran Saing; Hernowo Widodo; Siti Setiawati; Ismaniah
Jurnal Sains Teknologi dalam Pemberdayaan Masyarakat Vol. 2 No. 2 (2021): December 2021
Publisher : Fakultas Teknik Universitas Bhayangkara Jakarta Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31599/jstpm.v2i2.791

Abstract

Tema PKM ini adalah Edukasi Menanggulangi Pandemi Covid-19 Berbasis Komuniti Untuk Mewujudkan Kekuatan Pentahelix. Penanggulangan pandemi Covid-19 berbasis masyarakat menjadi perhatian utama saat ini, dimana masyarakat setempat diberdayakan untuk membentuk komunitas yang akan menjadi agen perubahan di masyarakat dalam mengatasi Covid-19, memutus mata rantai penularan serta memantau penerapan era kehidupan normal baru. Pentahelix merupakan metode optimalisasi 5 (lima) kekuatan (Pemerintah, komunitas (masyarakat), akademisi, pengusaha dan media sosial) yang saat ini sedang dikembangkan pemerintah sebagai upaya percepatan penanganan covid-19. Edukasi dilakukan dengan memberikan pendampingan membentuk komunitas di Kampung Karang Mulya, Desa Karang Satria, Tambun, Bekasi, yang menerapkan kebijakan strategis dalam penanganan Covid-19 melalui pembentukan pos satgas muda.
Pengaruh Pelarut Metanol terhadap Alumunium sebagai Wadah Obat Salep Mata Hernowo Widodo; Joni Warta; Maria Ulfah; Amaliah Annisa
Jurnal Jaring SainTek Vol. 1 No. 2 (2019): Oktober 2019
Publisher : Fakultas Teknik, Universitas Bhayangkara Jakarta Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31599/jaring-saintek.v1i2.176

Abstract

Corrosion is a decrease in the quality of a material or metal due to electrolyte reactions in the environment that affect the life of the material. Corrosion rate is the speed of propagation or speed of decline in the quality of a material with time. Corrosion processes occur in acidic environments, sea water, rain water, and soil are the result of chemical reactions that are also caused by electrochemical processes. The purpose of this study is to determine the corrosion resistance of aluminum metal to variations in the solution of Methanol (CH3OH). This study uses aluminum plates that will be immersed 5 days with a solution of Methanol (CH3OH). How to collect data by testing the Scanning Electron Microscopy (SEM) on each aluminum plate specimen that has been treated with corrosion by heating at a temperature of 60 oC. Methanol solution is one of the factors causing corrosion of metals. If in the free environment, air, temperature, and acidic substances are most commonly found as a factor causing corrosion. The increased corrosion rate is due to the higher concentration of the cause of corrosion. In this discussion Methanol as the concentration used, and aluminum as the metal tested.
Co-Authors Ahmad Fauzi Ahmad Fauzi Amaliah Annisa Amaliah Annisa Ananda Siti Choirunnisa Andhy Andhy Annisa, Amaliah Bungaran Saing, Bungaran Cecep Kusmana Eka Fhauziah Elvi Kustiyah Elvi Kustiyah Elvi Kustiyah, Elvi Everlita Sabrina Everlita Sabrina Fhauziah, Eka Ilham Santoso Ismaniah Ismaniah Joniwarta, Joniwarta Laras Andria Wardani Laras Andria Wardani Laras Andria Wardani lisa adhani Lisa Adhani Lisa Adhani M Samsuri Maesaroh, Elsa Mardiana Maria Ulfah Mohamad Prastya Mohamad Prastya Mohammad Riyadi Setyarto Piti, Viriya Rehab Laila Retno Wulandari Rino Dwiatmaja Samsul Ma’rif Santoso, Ilham Siswanto, Budiarto Djono Siti Setiawati Solihatun Solihatun Vicky Anderesta Kuswoyo Viriya Piti Widyantoro, Murwan Winda Dewi Nolisa Yustinus Trihusodo