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All Journal AUSTENIT Jurnal Teknik Kimia USU Jurnal Pangan dan Agroindustri Jurnal Sumberdaya Alam dan Lingkungan IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Sriwijaya International Seminar on Energy-Environmental Science and Technology Indonesian Journal of Chemical Science Science and Technology Indonesia Journal Of Chemical Process Engineering (JCPE) JOURNAL OF INDUSTRIAL AND MANUFACTURE ENGINEERING Jurnal Serambi Engineering JURNAL PENDIDIKAN TAMBUSAI Jurnal Teknik Kimia Jurnal Inovasi Teknik Kimia Jurnal Daur Lingkungan ASEAN Journal of Chemical Engineering Kinetika Jurnal Teknik Industri Terintegrasi (JUTIN) Yumary: Jurnal Pengabdian kepada Masyarakat Jurnal Pendidikan dan Teknologi Indonesia Jurnal Ilmiah Wahana Pendidikan Jurnal Energi Baru dan Terbarukan AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) International Journal of Research in Vocational Studies (IJRVOCAS) Aptekmas : Jurnal Pengabdian Kepada Masyarakat Chemical Engineering Journal Storage (CEJS) Jurnal Teknik Kimia USU Journal of Applied Agricultural Science and Technology Innovative: Journal Of Social Science Research Journal Of Chemical Process Engineering Serambi Engineering Jurnal Rekayasa Proses
Muhammad Yerizam
Politeknik Negeri Sriwijaya
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Biocoal Characterization as an Environmentally Friendly Alternative Energy Innovation Composite Variations of Gasified Char with Coconut Shell Charcoal Aria Yopianita; Aida Syarif; Muhammad Yerizam; Rusdianasari Rusdianasari
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 7, No 2 (2022): June 2022
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v7.i2.68

Abstract

In accordance with the mandate of the Regulation of the Indonesian Minister of Energy and Mineral Resources for the use of cleaner coal through coal gasification projects, in the future the coal gasification industry will produce char as a by-product. This study aims to characterize coal gasification char using a prototype underground coal gasification (UCG) and the addition of coconut shell charcoal biomass as a raw material for making biobriquettes. By using coal as raw material from the Muara Tiga Besar Mine of PT Bukit Asam, five kinds of coal samples from different layers were obtained, which from the characterization results, both coal and char, did not have too significant deviations so that the research variables could be ignored. The results of the characterization of char from coal gasification results compared to the initial sample of coal showed an increase in calorific value, a decrease in sulfur content and a significant decrease in water content, so it can be concluded that char from coal gasification has good potential as a raw material for biobriquettes. By using char and coconut shell charcoal with the ratio of variations in the composition of char and coconut shell compositions is 100%:0%; 75%:25%; 50%:50%; 25%:75% and 0%:100% carried out the briquetting process. The results of the biobriquette characterization met the criteria of the Indonesian National Standard (SNI) 01-6235-2000 and Minister of Energy and Mineral Resources regulation No. 047 of 2006
Characterization Biofuel from Empty Fruit Bunch through Thermal Cracking Daya Wulandari; Rusdianasari; Muhammad Yerizam
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 2 No. 2 (2022): IJRVOCAS - August
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v2i2.104

Abstract

Empty Fruit Bunches (EFB) are oil palm waste that has the potential as a source of bioenergy because it contains lignocellulose (cellulose, hemicellulose, and lignin) so that it can be converted into biofuel through thermal cracking, adsorption, and distillation processes. Thermal cracking is the decomposition of the chemical content of biomass by utilizing heat without a mixture of oxygen at a temperature of 200oC–600oC. This study aims to obtain the characteristics of the raw material of EFB in the form of proximate, ultimate, lignin, and biofuel produced. The research was conducted using a thermal cracking reactor designed to control the temperature at 300oC, 350oC, 400oC, and 450oC. The results showed that the raw material characteristics of EFB from proximate were 13.66% water content, 8.74% ash content, 58.66% volatile matter and 18.90% fixed carbon. This water content is relatively high. This is because the drying process on the material has not run perfectly. The ultimate result showed that the EFB had a C content of 54.45%, H content of 5.00%, and O content of 16.27%. The atomic ratio obtained from the ultimate analysis can indicate the amount of calorific value that can be used for certain fuels. The smaller the atomic ratio value contained, the more significant the calorific value contained in a particular fuel. Klason method was carried out to decrease the level of lignin through 4 stages; the lignin content without delignification was resulting into 24.87%, the addition of aquadest was resulting into18.71%, the addition of 5% HCl resulting into 15.34%, and 10% HCl resulting into 14.49%. Delignification of 10% HCl is the pretreatment process before the thermal cracking. The thermal cracking process forms steam; the steam is then condensed to obtain bio-oil. The formed bio-oil was kept to separate the oil from tar. In order to obtain good biofuel quality, adsorption is carried out with zeolite adsorbent, which has been activated with HCL. A comparison of the physical properties of bio-oil before and after adsorption shows a color difference from brownish black to the adsorbed bio-oil, which is distilled to separate the heavy and light fractions. The temperature of 450oC at thermal cracking is close to optimum; when the temperature is increased, the cracking process will be more straightforward and occur optimally. The biofuel produced in this study was tested for its characteristics such as, density (927-1086.68 Kg/m3), kinematic viscosity (1.17-1.43 mm2/s), and flash point (66.00-70, 23oC). The biofuel product produced is dominated by C5-C15 compounds (45.07%) according to the results of GC-MS analysis.
Analysis of Ogan Ilir Regency's Kelakar River Runoff Discharge in Micro Hydro Power Plant (PLMTH) Planning Renny Citra Ramadhani; Muhammad Yerizam; Indrayani Indrayani
Science and Technology Indonesia Vol. 5 No. 2 (2020): April
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2835.44 KB) | DOI: 10.26554/sti.2020.5.2.41-44

Abstract

Micro hydro power plant (PLTMH) is an alternative source of electrical energy for the community where by using this PLTMH the community can utilize the existing river flow as electricity generation. The country of Indonesia has many rivers and creeks that can be used optimally in producing alternative electricity. Kelakar River, located in Ogan Ilir Regency has the potential to be developed as a Micro Hydro Power Plant (PLTMH) that can be used to supply electricity in the region around the Ogan River. Data analysis includes: catchman area analysis, rainfall analysis, calculation of rainfall intensity plan, calculation of runoff discharge, and analysis of river flow rates. Based on the analysis that has been done, the Kelekar river runoff discharge is QRmax of 211.109 m3/second and QRmin of 15.732 m3/second. From this result, the selection of turbines to be used in PLTMH planning is Propeller Type turbines.
Characterization of Rubber Seed (Hevea Brasiliensis) as Raw Material for The Production of Biofuel Ayuni Lestari; Muhammad Yerizam; Abu Hasan
Journal of Applied Agricultural Science and Technology Vol. 7 No. 3 (2023): Journal of Applied Agricultural Science and Technology
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jaast.v7i3.140

Abstract

Rubber seeds from the Musi Rawas region in South Sumatra have great potential for rubber seed plantations. However, their utilization has not been maximized and they are often treated as plantation waste. This research aims to obtain the characteristics of rubber seeds as raw materials for biofuel production, so that the rubber seeds from the South Sumatra region can be utilized by the community and not just considered as plantation waste. In the first treatment, the rubber seeds are crushed to obtain the seed coat and the kernel. The crushed rubber seed shells are finely ground and sieved, while the kernel is pressed to extract vegetable oil using a pressing tool. The test methods used to determine the characteristics of the rubber seed shells include proximate analysis and calorific value, while GC-MS analysis is employed for the rubber seed oil. The proximate analysis of the rubber seed shell (RSS) yielded the following results: moisture content of 15.97 wt%, volatile matter of 47.43 wt%, fixed carbon of 32.45 wt%, and ash content of 4.15 wt%. The calorific value of the rubber seed shell was found to be 3312.8694 calories per gram. For the GC-MS yield of the rubber seed oil, the composition is as follows: palmitic acid 7.32%, linoleic acid 34.69%, oleic acid 45.35%, and pentadecanoic acid 8.86%. Based on the obtained results, rubber seeds show promising potential as raw materials for biofuel production through the pyrolysis process.
PEMBUATAN BIOETANOL BERBAHAN BAKU Chlorella pyrenoidosa DENGAN METODE HIDROLISIS ASAM DAN FERMENTASI Asyeni Miftahul Jannah; Muhammad Yerizam; Muhammad Yori Pratama; Achmad Reza Aditya Amin
Journal of Chemical Process Engineering Vol 8, No 1 (2023)
Publisher : Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jcpe.v8i1.1256

Abstract

Mikroalga, seperti C. pyrenoidosa dapat digunakan sebagai bahan baku untuk produksi bioetanol generasi ketiga. Pemanfaatan karbohidrat mikroalga, seperti C. pyrenoidosa untuk produksi bioetanol memiliki tiga tahap utama, yaitu pretreatment bahan baku, hidrolisis, dan fermentasi. Penelitian ini bertujuan untuk mengetahui pengaruh hidrolisis asam dan waktu fermentasi pada proses pembuatan bioetanol berbahan baku C. pyrenoidosa. C. pyrenoidosa dihidrolisis menggunakan asam sulfat dengan konsentrasi yang bervariasi (1, 2, 3, 4 dan 5) % pada suhu 80oC selama 75 menit.  Produksi bioetanol dilakukan dengan fermentasi glukosa menggunakan Saccharomyces cerevisiae dengan variasi waktu 1, 2, 3, 4 dan 5 hari. Hasil penelitian menunjukkan bahwa konsentrasi glukosa yang didapatkan mengalami peningkatan seiring naiknya konsentrasi asam sulfat dengan konsentrasi glukosa tertinggi, yaitu 5,97 gr/L didapatkan setelah hidrolisis menggunakan larutan asam sulfat 5%. Kadar bioetanol tertinggi, yaitu 19,28% diperoleh dari 5 hari fermentasi sampel hidrolisis 5% asam  sulfat.
Tetes Tebu Menjadi Katalis Untuk Proses Pembuatan Biodiesel Raysha Amelya; Indah Purnamasari; Muhammad Yerizam
Jurnal Serambi Engineering Vol 8, No 4 (2023): Oktober 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i4.6756

Abstract

Sugar cane is a plant that is processed into crystal sugar because it contains high sugar content. Sugar production produces waste, one of which is molasses waste. This study aims to obtain molasses into a catalyst using the carbonization method and the sulfonation method. The sulfonation method uses variations in the concentration of 2, 4, 6, 8, and 10 N H2SO4 solution and variations in sulfonation time of 2, 4, and 6 hours to get the best molasses catalyst. Catalyst characterization includes surface acidity by acid-base titration, FT-IR, and SEM-EDX. This research also aims to produce biodiesel yield using the best molasses catalyst. The results of surface acidity analysis showed that the best molasses catalyst was obtained at 10 N H2SO4 concentration with 6 hours at 0.907 mmol/gr. FT-IR test results showed the presence of O=S=O functional groups at wave numbers 1149.74 cm-1 and 1038.57 cm-1. SEM and EDX analysis results showed that the molasses catalyst after sulfonation had smaller pores and more sulfur groups on the carbon sheet. The yield of biodiesel produced using a molasses catalyst was 84.51%.
Effect of Alkaline Catalyst Concentrations and Weight Ratios of Oil to Methanol on the Biodiesel Production From Waste Cooking Oil Anggi Dwi Chandrika; Muhammad Yerizam; Anerasari Meidinariasty
Indonesian Journal of Chemical Science Vol 12 No 3 (2023)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v12i3.72542

Abstract

The effect of alkaline catalyst and raw material ratio for the transesterification reaction of used cooking oil that has been previously processed has been investigated. The research was conducted by reacting the waste cooking oil with methoxy solution to obtain biodiesel. The purpose of the research was to obtain the optimum condition of the transesterification reaction, the best percent yield, and the compounds contained in the biodiesel and to compare the biodiesel obtained with SNI 7182:2015 based on the parameters of density, acid number, flash point, and cetane number. Based on the results of the study, the optimum condition obtained was at a ratio of 1:12 with a 2% KOH alkali catalyst and a yield of 92.65%. The biodiesel quality test results meet the standard requirements according to SNI 7182: 2015 with a density value of 0.86 gr/cm3, viscosity of 4.205 cSt, acid number 0.23 mgKOH/g, flash point 176.2 oC, and cetane number 68.2. The results of GCMS analysis showed 9 peaks identified with the main components of the compounds contained were hexadecanoic acid, methyl ester; 9,12-octadecadienoic acid, methyl ester; 9-octadecenoic acid, methyl ester.
Pengolahan Pati Rumbia menjadi Serbuk Glukosa secara Hidrolisis Enzimatis dengan Variasi Perbandingan Pati dan Air, Suhu Evaporasi, dan Suhu Pengeringan Az’zahrah, Nandyta Rizqi; Dewi, Erwana; Yerizam, Muhammad
Jurnal Teknik Kimia USU Vol. 13 No. 1 (2024): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v13i1.13327

Abstract

Glucose is a simple sugar that can be used as an sucrose alternative. Rumbia starch is rich in carbohydrates and abundant in Indonesia, potentially being used as a raw material for the production of glucose powder. The process involves starch hydrolysis, evaporation, and drying. The purpose of this study was to obtain optimal conditions of reducing sugar content, evaporation, and drying temperature based on variations in starch and water ratio (1:3, 1:4, 1:5, and 1:6), evaporation temperature (100 °C and 115 °C), and drying temperature (50 °C, and 70 °C). From this study, the optimal ratio of starch and water was 1:4 with a reduced sugar content of 99,77%. The optimal evaporation temperature was 115 °C, the brix content obtained is 85%, and the optimal drying temperature was 70°C, the water content obtained is 3,60%. Based on SNI of glucose, the glucose powder products meet the standard for water content and ash content. However, only in the ratio of starch and water 1:4 and 1:5, the reducing sugar content met the SNI of glucose.
Laju Perpindahan Panas Konduksi dan Konveksi Pada Pengeringan Pulp Campuran “TKKS” dan Pelepah Pisang dalam Tray Dryer Nabila, Rizky Ayu; Yerizam, Muhammad; Purnamasari, Indah
Jurnal Pendidikan Tambusai Vol. 7 No. 3 (2023): Desember 2023
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v7i3.10559

Abstract

Pengeringan adalah proses pengurangan kadar air suatu bahan dengan cara menguapkan sebagian besar air menggunakan energi panas. Pulp dalam penelitian ini adalah terbuat dari campuran Tandan Kosong Kelapa Sawit (TKKS) dan pelepah pisang. Dalam proses pengeringan terjadi proses perpindahan panas yang terbagi menjadi konduksi (hantaran) dan konveksi. Peristiwa perpindahan panas secara radiasi akan lebih efektif apabila terjadi pada ruang hampa, berbeda dengan perpindahan panas konduksi dan konveksi yang mengharuskan adanya media perpindahan panas. Sehingga, perpindahan panas secara radiasi dapat diabaikan. Pada penelitian ini dilakukan proses pengeringan pulp menggunakan pengering tipe tray dryer. Tray dryer atau pengering tipe rak merupakan pengering berbentuk persegi dengan rak di dalamnya, yang digunakan sebagai tempat bahan yang akan dikeringkan. Berdasarkan hasil proses pengeringan tersebut, diperoleh nilai rata-rata laju perpindahan panas konduksi dan laju perpindahan panas konveksi, dimana untuk laju perpindahan panas konduksi sebesar 0,127 kJ; 0,095 kJ; 0,070 kJ ; 0,064 kJ ; 0,051 kJ. Untuk laju perpindahan panas konveksi sebesar 0,042 kJ; 0,035 kJ; 0,023 kJ; 0,014 kJ; 0,009 kJ. Sedangkan untuk kandungan kadar air pulp yang mendekati Standar Balai Besar Pulp, 1989 (SNI-7274:2008) adalah 7,5% pada temperatir pengeringan 70? dengan waktu pengeringan 150 menit.
Physical Properties Investigations of Natural Rubber Composites Using Cetyltrimethylammonium Bromide (CTAB) as Modifier of Local Clay Filler Hasan, Abu; Junaidi, Robert; Yerizam, Muhammad; Arifin, Fatahul
ASEAN Journal of Chemical Engineering Vol 23, No 3 (2023)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.80712

Abstract

Improved absorption of rubber backbone on filler surfaces is necessary to enhance the physical properties of rubber vulcanizate. One of the ways to repair the surface of the filler is through modifying using surfactant. Hence, this study aims to compare the physical properties of natural rubber vulcanizates using clay filler and modified clay with cetyltrimethylammonium bromide (CTAB). The processes that were followed to achieve the objectives of this research were the design of rubber formulas, mastication and milling of rubber, and testing of the physical properties of rubber vulcanization. The clay characterization and its modification using FTIR and XRD were also carried out. Characterization using FTIR and XRD showed that there was indeed a clay modification with CTAB. Natural rubber compounds were also analyzed using SEM. The torque on the rheometer for modified clay with CTAB is 12.34 kg-cm higher than for original clay, which is 7.05 kg-cm. Elongation at break and tensile strength for vulcanizate using CTAB-modified clay filler is lower than that using original clay, with 300% modulus and hardness increase. Thus, clay modification using CTAB as a filler has a good effect on the curing characteristics and physical properties of natural rubber vulcanization compared to only using local clay as a filler.
Co-Authors Abu Hasan Abu Hasan Abu Hasan Achmad Reza Aditya Amin Agus Manggala Agustin Pratiwi, Ines Aida Syarif AIDA SYARIF Akbar Ismi Aziz Pramito Alfajri, Ahmad Rizki Aliyah Montessa Alsarah, Danil Son Amin, Achmad Reza Aditya Anerasari Meidinariasty Anerasari Meidinariasty Anerasari Meidinariasty Anggi Dwi Chandrika Apriansyah Zulatama Aprilia, Luraselly Arda Apriyansah Apriyansah, Apriyansah Ardiani, Salsha Aria Yopianita Arif Budiman Asyeni Miftahul Jannah Asyeni Miftahul Jannah Ayuni Lestari Azaria Hikmah Fajrianti Az’zahrah, Nandyta Rizqi Cindi Ramayanti Dina Eka Pranata Dwi Nugroho, Afrian Eka Mulyana, Eka Ekawati, Linda Ellina Margaretty Endang Sri Rahadianti Erwana Dewi Erwin Erwin Fatahul Arifin, Fatahul Febri Liani Br Simanjuntak Fenoldi, Nova Feri Hafidz, Abdurrahman Helen Chairunisa Ihtifazhuddin, Farhan Indah Purnamasari INDAH PURNAMASARI Indah Purnamasari Indrayani Indrayani Jabborov, Behzod Kalsum, Leila Khairunnisa, Annisa Septia Kusuma, Mutmainnah Ningtyas M, Anerasari M. Ridho Triadi M. Zaman Manggala, Agus Martha Aznury Martha Martha Mediniariasty, Anerasari Muhammad Yori Pratama Muhammad Zaman Mustain Zamhari Mustain Zamhari Nabila, Rizky Ayu Ningsih, Anis Wahyu Nurjanah, Rizki Nyayu Fia Atindu Nyayu Zubaidah Nyayu Zubaidah Pratama, Andrian Putra Pratama, Muhammad Yori Puspa, Dilia Putra, Rizkika Raysha Amelya Renny Citra Ramadhani Riansyah, Epan Robert Junaidi Robert Junaidi Rusdianasari Rusdianasari Rusdianasari Rusdianasari Rusdianasari Sabrina, Delanisa Saqila Putri Aulia Sari Rizky Amelia Sari, Rahmaida Sarmidi Sarmidi Selastia Yulianti Selastia Yuliati Silmi Tsabita Sirait, Agnes Tasya Pintauly Syafitri, Aulia Tamara, Ade Wan Qori Sri Maulani Wardhana, Agum Try Winnugroho Wiratman, Manfaluthy Hakim, Tiara Aninditha, Aru W. Sudoyo, Joedo Prihartono Yahya, Muhammad Habib Yohandri Bow Zain, Raina Khoirunisa Zamheri, Ahmad