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All Journal Jurnal Kesehatan Lingkungan indonesia KONSELI: Jurnal Bimbingan dan Konseling (E-Journal) Jurnal Hasil Penelitian Industri JURNAL SERAMBI ILMU SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) JURNAL PENDIDIKAN TAMBUSAI SCAFFOLDING: Jurnal Pendidikan Islam dan Multikulturalisme Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat El-Mujtama: Jurnal Pengabdian Masyarakat International Journal of Social Service and Research Makara Journal of Technology JURUTERA (Jurnal Umum Teknik Terapan) Analysis : Journal of Education Jurnal Komprehenshif El-Mujtama: Jurnal Pengabdian Masyarakat Jurnal Maisyatuna JURNAL REKAYASA KIMIA & LINGKUNGAN
Mahidin Mahidin
Jurusan Teknik Kimia Universitas Syiah Kuala, Jl. Syech Abdurrauf, No. 7, Banda Aceh - Indonesia
Religion Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Other

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Journal : JURNAL REKAYASA KIMIA

 1 
Conversion of Green Coconut Shell and Husk into Biobriquette Using Jatropha seed Adhesive Utami, Putri Agus; Sudarmi, Raudhatul Aulianatia; Sahara, Siti; Anwar, Khairul; Mahidin, Mahidin; Djuned, Fauzi Muhammad
Jurnal Rekayasa Kimia & Lingkungan Vol 20, No 1 (2025): Jurnal Rekayasa Kimia & Lingkungan (June, 2025)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

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Abstract

Green coconut shell and husk (GCSH) waste had the potential to pollute the environment if not properly utilized. As a solution, innovations in processing GCSH into biobriquettes could generate eco-friendly renewable energy with economic value. This study aimed to optimize the utilization of GCSH as a raw material for biobriquettes by adding jatropha seeds as an adhesive, as well as evaluating the characteristics of the produced biobriquettes. Fabrication of biobriquette was carried out using two methods: conventionally (without burning) and by pyrolysis (with burning) at temperatures of 380C, 430C, and 480C for 3.5 hours. The charcoal obtained from pyrolysis was mixed with jatropha seed adhesive at concentrations of 15%, 20%, and 25%, then molded at a pressure of 110 kg/cm and dried at 105C. The results showed that pyrolysis temperature and adhesive concentration affected the moisture content, ash content, calorific value, compressive strength, and combustion rate of the biobriquettes. Optimum conditions were achieved at a pyrolysis temperature of 430C with the addition of 25% adhesive, resulting in biobriquettes with high calorific value (6367.74 cal/g), low moisture content (7.44%), and good combustion rate (0.10219 g/min). This study proved that utilizing GCSH waste and jatropha seeds for biobriquettes had great potential as an efficient and sustainable source of renewable energy.
Carbon Dioxide (CO2) Separation Study Using Chemically Activated Serpentine as an Adsorbent Dhedia, Muhammad Fannka; Mahidin, Mahidin; Husin, Husni; Hisbullah, Hisbullah; Razali, Nasrullah; Reza, Alvan Ade; Hadi, Abdul
Jurnal Rekayasa Kimia & Lingkungan Vol 19, No 2 (2024): Jurnal Rekayasa Kimia & Lingkungan (December, 2024)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v19i2.41399

Abstract

The increase in carbon emissions resulting from industrial activities has become a major concern for environmental and climate conditions. Carbon Capture and Storage (CCS) represents a significant effort to mitigate the CO2 problem. Aceh Province possesses a potential distribution of serpentine, which may serve as an effective material for CCS applications. This study evaluates the effects of gas flow rate, particle size, sorbent weight, and pressure on CO2 adsorption using chemically activated serpentine. The activation process involved hydrochloric acid (HCl) at three concentrations: 8%, 9%, and 10%, with particle sizes of 50 mesh, 100 mesh, and 150 mesh. Activation was conducted at room temperature with an acid-to-serpentine ratio of 10:1 for 30 minutes. Adsorption tests were performed at ambient temperature under pressures of 2, 3, and 4 bar, with adsorption times of 30, 60, and 120 minutes. Results indicate that activated serpentine treated with 9% HCl and a particle size of 150 mesh achieved the highest performance, demonstrating an adsorption efficiency of 33.01% and an adsorption capacity of 82.22% (0.0488 g CO2/g adsorbent) at a pressure of 2 bar. Both the Langmuir and Freundlich isotherm models closely fit the data (R = 1). This study concludes that HCl activation significantly enhances the capacity and efficiency of serpentine as a CO2 adsorbent.
Adsorption of Mercury (II) Ions from Water Using Carbon-Based Monolith with Manganese Oxide Filler Kusuma, Debby Widya; Mahidin, Mahidin; darmadi, darmadi
Jurnal Rekayasa Kimia & Lingkungan Vol 17, No 2 (2022): Jurnal Rekayasa Kimia & Lingkungan (December, 2022)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v17i2.27747

Abstract

Mercury is harmful to humans and the ecological environment. The adsorption process is known as an effective method for removing heavy metals. This research is devoted to developing new adsorbents based on carbon materials to remove metal ions Hg(II) with carbon-based monolith adsorbents without and with manganese oxide fillers (KM and KMM). The results of adsorption efficiency, adsorption kinetics, and isotherm models were made in a batch system with varying concentrations of mercury solution from 2 mg/L to 6 mg/L with adsorbents without and with manganese oxide fillers (KM and KMM). The highest removal efficiency reached 96% on KMM and 47% on KM. The adsorption isotherm of Hg(II) ions corresponds to the Freundlich model, with intensity and volume constants obtained respectively 0.042 and 1.347 L/mg on KM adsorbents, while on KMM adsorbents the intensity and volume constants obtained are 0.291 and 2.079, respectively. L/mg. These results indicate that physical adsorption occurs more dominantly than chemical adsorption. The adsorption of Hg(II) ions was in accordance with the pseudo-first-order adsorption kinetics, with the adsorption capacity and rate constant on the KM adsorbent obtained were 0.0505 mg/g and 0.0072 g/mg, while the adsorption capacity and rate constant for the KMM adsorbent were on KM adsorbents obtained were 0.0848 mg/g and 0.0239 g/mg.
Kapasitas Adsorpsi Bentonit terhadap Sulfur dan Merkuri secara Simultan pada Pembakaran Batubara Yusran, Alhamidi; Supardan, Muhammad Dani; Mahidin, Mahidin
Jurnal Rekayasa Kimia & Lingkungan Vol 10, No 4 (2015): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v10i4.3309

Abstract

Pemanfaatan batubara sebagai sumber energi melalui pembakaran langsung akan menghasilkan emisi gas, partikulat trace metal (logam berat) dan abu (terutama abu terbang) yang akan mencemari udara. Penanganan terhadap pencemaran tersebut merupakan hal yang sangat mendesak. Dalam studi ini ditawarkan penyelesaian secara simultan terhadap emisi SOx dan partikulat logam berat merkuri pada pembakaran batubara peringkat rendah yang ada di Aceh melalui penyerapan menggunakan bentonit alam yang juga terdapat di Aceh (juga di daerah lain di Indonesia). Penggunaan bentonit dapat mengurangi emisi gas SO2 dan partikulat trace metal Hg dalam gas buang dan abu terbang. Bentonit dapat meningkatkan afinitas atau gaya tarik menarik antara Hg dan mineral-mineral dalam bentonit dan sekaligus menurunkan afinitas Hg terhadap S atau SO2. Konsentrasi bentonit dalam kajian ini, tanpa kalsinasi dan langsung dicampur dalam batubara, adalah 0 16% dan temperatur pembakaran adalah 700 900oC. Hasil yang didapat menunjukkan bahwa kondisi maksimum penyerapan sulfur dan/atau SO2 serta merkuri terjadi pada kandungan bentonit 6% dan temperatur 700oC.
Karakteristik Pembakaran Beberapa Jenis Biomassa dalam Fluidized Bed Boiler Mahidin, Mahidin; Hamdani, Hamdani; Muhtadin, Muhtadin; Faisal, Muhammad; Mahyuddin, Mahyuddin
Jurnal Rekayasa Kimia & Lingkungan Vol 10, No 1 (2014): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v10i1.2167

Abstract

Pembakaran biomassa dalam rangka memproduksi energi termal untuk menghasilkan utilitas lain dapat dilakukan dengan mengkonversi energi tersebut ke bentuk energi lain. Boiler dengan unggun terfluidisasi dipilih sebagai teknologi konversi energi termal menjadi energi listrik, karena kukus yang diproduksi dapat digunakan untuk menggerakkan turbin yang dikopling dengan generator listrik. Unit dimana proses pembakaran berlangsung, yaitu ruang bakar dan freeboard dipilih sebagai target pengamatan untuk mengevaluasi kinerja boiler tersebut. Hasil pengamatan terhadap pembakaran tiga jenis biomassa, serpihan kayu ketam, kulit pinang dan ranting kayu kering, memperlihatkan bahwa masing-masing jenis biomassa memiliki karakteristik pembakaran tersendiri. Temperatur pembakaran maksimum untuk serpihan kayu ketam dan ranting kayu kering didapatkan pada waktu pembakaran 30 detik, sementara untuk kulit pinang pada 20 detik. Hasil yang sangat menarik adalah ditemukan bahwa temperatur maksimum dapat ditingkatkan dengan mengubah sistem pengumpan bahan bakar. Sistem pengumpan antara memberikan temperatur maksimum yang lebih tinggi dibanding dengan sistem pengumpan biasa.
Modeling and Simulation on NOx and N2O Formation in Co-combustion of Low-rank Coal and Palm Kernel Shell Mahidin, Mahidin; Gani, Asri; Khairil, Khairil
Jurnal Rekayasa Kimia & Lingkungan Vol 9, No 2 (2012): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

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Abstract

NOx and N2O emissions from coal combustion are claimed as the major contributors for the acid rain, photochemical smog, green house and ozone depletion problems. Based on the facts, study on those emissions formation is interest topic in the combustion area. In this paper, theoretical study by modeling and simulation on NOx and N2O formation in co-combustion of low-rank coal and palm kernel shell has been done. Combustion model was developed by using the principle of chemical-reaction equilibrium. Simulation on the model in order to evaluate the composition of the flue gas was performed by minimization the Gibbs free energy. The results showed that by introduced of biomass in coal combustion can reduce the NOx concentration in considerably level. Maximum NO level in co-combustion of low-rank coal and palm kernel shell with fuel composition 1:1 is 2,350 ppm, low enough compared to single low-rank coal combustion up to 3,150 ppm. Moreover, N2O is less than 0.25 ppm in all cases.Keywords: low-rank coal, N2O emission, NOx emission, palm kernel shell
A Comparison of Energy Profile between Castilla Leon, Spain and Aceh, Indonesia Mahidin, Mahidin; Khairil, Khairil; Martin, Carmen; Villamanan, Miguel A.; Segovia, Jose J.; Chamorro, Cesar R.
Jurnal Rekayasa Kimia & Lingkungan Vol 7, No 4 (2010): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

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Abstract

A comparative study on energy production and consumption between Aceh, Indonesia and Castilla Len, Spain has been conducted. Analysis was carried out on the statistical data such as population, GDP, energy production and energy consumption. Some interesting results were obtained. An average energy production during 2001 2004 in Aceh is up to 28 times of the average energy production in Castilla Len; however, the average energy consumption during those four years is only 16.74% of the average energy consumption of Castilla Len. Aceh's average GDP from 2001 to 2004 is 3,357.16 million Euros, stands at only 8.15% of Castilla Len's average GDP about 41,175.75 million Euros.Keywords: economic growth, final energy consumption, GDP, primary energy production
Co-Authors Abdul Aziz Rusman Abdul Hadi Agustami Sitorus, Agustami Agustina, Liana Alhamidi Yusran, Alhamidi Ameilia Zuliyanti Siregar Angi, Nur Fadila Asri Gani Ayyub, Muhammad Carmen Martin Cesar R. Chamorro Cut Mutiawati Cut Nurmaliah Darmadi Darmadi Delviga, Delviga Dhedia, Muhammad Fannka Djuned, Fauzi Muhammad Fitriani Fitriani Hamdani Hamdani Hani, M. Reza Harti, Marisa Hasibuan, Ali Daud Hasibuan, Nurmiah Hisbullah Hisbullah Hrp, Muhammad Royhan Husni Husin Indera Sakti Nasution Izarul Machdar, Izarul Jose J. Segovia Ketut Tirtayasa Khairil Khairil Khairul Anwar Khalila Daulay, Nurika Kusuma, Debby Widya Lubis, Aismat Ihsan Mahyuddin Mahyuddin Mariana Mariana Mashadi Mashadi Melinda Melinda Meuthia Busthan, Meuthia Meutia Nauly Mia Aulia, Mia Miguel A. Villamanan Muhammad Dani Supardan Muhammad Faisal Muhammad Nizar Muhammad Syukur Muhibbuddin Muhibbuddin Muhibuddin Muhibuddin, Muhibuddin Muhtadin Muhtadin Nasrul Arahman Nasrul Nasrul Nuraida Nuraida Nurbaini, Nurbaini Oktaviani, Coryna Puspita, Anggun Ramli, Ichwana Razali, Nasrullah Reza, Alvan Ade Sembiring, Rinawati Sipayung, Dewi Mentari Siregar, Netti Herlina Siregar, Rahmah Sudana Siti Sahara Sudarmi, Raudhatul Aulianatia Suhada, Deksa Imam Sulastri Sulastri Susmita Br. Siregar, Tiya Modi Syahiddin Dahlan Said Syukri, Makmur T.M.I. Mahlia Teuku Azuar Rizal Tulus Tulus Utami, Putri Agus Zulkifli Nasution