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Potensi Dekarbonisasi Pembangkit Listrik Batubara Melalui Cofiring Biomassa Dan Carbon Capture Utilization Triani, Meiri; Anggoro, Didi Dwi; Yunianto, Vitus Dwi
METANA Vol 20, No 1 (2024): Juni 2024
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/metana.v20i1.63102

Abstract

Dekarbonisasi sektor pembangkit listrik adalah langkah penting untuk mencapai pengurangan emisi karbon secara signifikan. Proses transisi energi di Indonesia dihadapkan pada tantangan bahwa bahan bakar fosil masih mendominasi kebutuhan pembangkit listrik. Studi ini dilakukan untuk menganalisis potensi dan tantangan upaya dekarbonisasi sistem pembangkitan listrik di Indonesia, terutama dalam pengembangan cofiring biomassa dan carbon capture utilization storage (CCUS) di masa mendatang dengan melakukan literature review terhadap berbagai publikasi yang relevan dari database science direct, serta laporan dan publikasi dari situs resmi organisasi (The International Energy Agency, Perusahaan Listrik Negara, Dewan Energi Nasional) yang terkait dengan fokus utama artikel ini. Hasilnya menunjukkan bahwa cofiring memiliki potensi besar untuk dikembangkan sebagai inisiatif strategis untuk mempercepat pencapaian target proporsi energi terbarukan sebesar 23% pada tahun 2025, namun perlu peningkatan perhatian kepada pengembangan konsep penyediaan pasokan biomassa yang berkelanjutan. Di sisi lain implementasi teknologi CCUS perlu pertimbangan matang, dengan alasan faktor biaya yang tinggi dan tingkat pengembangan teknologi yang belum meluas.  One of the critical steps in significantly reducing carbon emissions is through decarbonization of the electricity sector. The high dependence of the electricity sector on fossil fuels is a critical challenge in the energy transition process in Indonesia. This study was conducted to analyze the potential and challenges of the decarbonization strategies for the electricity sector in Indonesia, especially for the future development of cofiring biomass and carbon capture utilization storage (CCUS), by conducting a literature review of various relevant publications from the science direct database, reports, and publications from the official website organizations (The International Energy Agency, Indonesian state-owned electricity company, National Energy Council) related to the main focus discussed in this article. The results show that cofiring has the potential to be developed as a strategic initiative in accelerating the achievement of a renewable energy mix of 23% by 2025. However, increased attention is needed to develop strategies for providing sustainable biomass supply. While implementing the CCUS project needs to be further consideration to be applied, primarily due to the high-cost factor and the level of technological development that has yet to be widespread. 
Effect of ultrasound-advanced oxidation processes for pretreatment of oil palm mesocarp fiber for cellulose extraction Anggoro, Didi Dwi; Prasetyaningrum, Aji; Udaibah, Wirda; Imtinan, Alifa Bakhitah; Nabilah, Farhanah; Le Monde, Brilliant Umara
International Journal of Renewable Energy Development Vol 13, No 3 (2024): May 2024
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2024.60027

Abstract

Palm mesocarp fiber, a by-product of the palm oil industry, holds significant potential as a cellulose source for biofuel, biopolymer, and biocomposite production. However, its utilization is hampered due to the presence of lignin, which covers the cellulose. The use of ozone promotes a high level of lignin degradation, making it efficient in breaking down lignin bonds in lignocellulose. However, the ozonation method has low ozone mass transfer. This deficiency can be overcome with ultrasonic waves because of the cavitation phenomenon that can expand the contact surface of ozone and lignocellulose. The ozonation-ultrasonic hybrid method is used to remove lignin. This research investigates the use of a hybrid ozonation-ultrasonic method with the effect of reaction time and pH under acidic conditions on the pretreatment of palm oil mesocarp fiber. This process was carried out at reaction times (70, 80, and 90 minutes) and solution pH (4, 5, and 6) with an ozone flow rate of 2 L min-1. The cellulose content was analyzed using the Chesson method. The results showed a decrease in lignin and an increase in cellulose, which was confirmed by Fourier Transform Infrared Spectroscopy (FTIR) analysis shows a decrease in the lignin absorption peak at 1635 cm-1 and 1420 cm-1. XRD analysis showed an increase in crystallinity after pretreatment, with lignin degradation observed at 6.35%. SEM Morphological showed a more friable, stable, and porous surface after pretreatment, indicating the presence of perforations in the cell walls and the damage to the lignin structure. Therefore, this research succeeded in reducing the use of chemicals in the biomass waste delignification process. The ozonation-ultrasonic hybrid pretreatment process, which aims to degrade lignin in palm fiber biomass, shows promising results, producing high cellulose content in palm fiber by reducing the amount of chemicals as mostly used in conventional processes.
Acidic Deep Eutectic Solvent as a Catalyst for the Esterification of Levulinic Acid to Ethyl Levulinate Jamarudin, Aizah; Zainol, Muzakkir Mohammad; Hassan, Abdull Hafidz; Ismail, Siti Norazian; Asmadi, Mohd; Zainuddin, Kamarul Ridwan; Yusof, Nurul Asyikin; Anggoro, Didi Dwi
Bulletin of Chemical Reaction Engineering & Catalysis 2025: BCREC Volume 20 Issue 1 Year 2025 (April 2025)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20253

Abstract

Deep eutectic solvents (DESs) are environmentally friendly compounds that can be synthesized through the combination of hydrogen-bond donors and acceptors. The diverse applications of DESs underscore their potential as catalysts in various chemical reactions. In this study, an acidic DES was prepared as a catalyst for levulinic acid (LA) esterification with ethanol to produce ethyl levulinate (EL). The acidic DES was prepared from choline chloride and sulfanilic acid through thermal mixing. Characterization of the DES was conducted using Fourier transform infrared-attenuated total reflectance and nuclear magnetic resonance spectroscopy analysis to identify its functional groups and confirm the structure. Additionally, the thermal stability of the DES was analyzed using thermogravimetric analysis, while its acidity was determined using acid-base titration. The esterification of LA with ethanol was assessed under reflux conditions at 80 °C, with specific parameters examined: the molar ratio of LA to ethanol (ranging from 1:5 to 1:13), the ratio of LA to DES (ranging from 1:0.4 to 1:1.4), and the reaction duration (0.5–5 h). The DES used in this work showed an acidity of 2.89 mmol/g. The optimum conditions were obtained at a 1:7 molar ratio of LA to ethanol, a 1:1.2 ratio of LA to DES, and 3 h of reaction time at 80 °C, resulting in 99% conversion of LA to EL. This finding highlights the remarkable catalytic performance of the choline chloride/sulfanilic acid DES in facilitating a highly efficient conversion of LA to EL. Copyright © 2025 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Impact of crosslinking on quaternary ammonium poly(vinyl alcohol)/polyquaternium-7 anion exchange membranes for alkaline polymer electrolyte fuel cells Samsudin, Asep Muhamad; Rokhati, Nur; Prasetya, Nor Basid Adiwibawa; Kumoro, Andri Cahyo; Anggoro, Didi Dwi; Nasher, Kharissa; Wahyudi, Dhiky; Roschger, Michaela; Hacker, Viktor
International Journal of Renewable Energy Development Vol 14, No 4 (2025): July 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.60897

Abstract

Alkaline Polymer Electrolyte Fuel Cells (APEFCs) have emerged as a promising candidate for clean energy production. Anion exchange membrane (AEM) is an essential element of alkaline polymer electrolyte fuel cells for its role in facilitating hydroxide ion conduction. The objective of this study is to investigate the effect of a glutaraldehyde-based crosslinker solution on the performance of anion exchange membranes (AEMs) fabricated using quaternary ammonium poly (vinyl alcohol) (QPVA) as the backbone polymer and polyquaternium-7 as the second polymer. The introduction of a glutaraldehyde-based crosslinking agent was purposed to enhance membrane stability and reduce excessive swelling. The study evaluates the impact of varying glutaraldehyde concentrations on membrane performance. FTIR analysis confirms the presence of key functional groups of QPVA, polyquaternium-7, and the crosslinking agent. SEM images reveal that the membranes demonstrate dense and homogeneous physical structure. The results show that water uptake, swelling degree, ion exchange capacity (IEC), and hydroxide conductivity are influenced by the concentration of the glutaraldehyde solution. The QP-GA-13 AEM exhibited the best overall performance, achieving the highest tensile strength of 31.1 MPa and the highest hydroxide ion conductivity of 4.15 mS cm⁻¹ at 70°C. In single-cell tests, this membrane delivered a maximum power density of 85 mW cm⁻² and a current density of 350 mA cm⁻² at 80°C under humidified oxygen conditions.
Free hydrogen-deoxygenation of waste cooking oil into green diesel over Ni-Marble waste catalyst: Optimization and economic analysis Anggoro, Didi Dwi; Prasetyoko, Didik; Hartati, Hartati; Zakaria, Zaki Yamani; Le Monde, Brilliant Umara; Nurdiani, Maulida
International Journal of Renewable Energy Development Vol 14, No 6 (2025): November 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.61241

Abstract

Diversifying energy through alternative sources, such as biofuels, is a practical and accessible option in Indonesia. This study aimed to optimize the yield of biofuel (green diesel) using Ni/marble waste as a catalyst. Deoxygenation offers a promising route for converting waste cooking oil (WCO) into valuable products. A Box–Behnken Design (BBD) was applied to assess the effects of key variables on the deoxygenation process using Response Surface Methodology (RSM). The variables included reaction time (2–6 h), reaction temperature (360–380 °C), and catalyst weight (1–3% w/w), with conversion percentage as the response. The results showed that reaction time and catalyst weight significantly influenced WCO deoxygenation (p < 0.05). The optimum conditions for maximum conversion were a reaction temperature of 373.64 °C, a catalyst weight of 3.45% w/w, and a reaction time of 4.35 h. Under these conditions, hydrocarbon selectivity reached 92.26%. Paraffins were the dominant fraction, confirming that the Ni/marble catalyst efficiently promoted deoxygenation with high selectivity toward C15–C18 hydrocarbons. These findings align with the proposed reaction mechanism, which involves decarboxylation, decarbonylation, and hydrodeoxygenation pathways. An economic evaluation under optimal conditions estimated a profit of $1.0469 per batch, demonstrating that converting waste cooking oil into green diesel is both technically feasible and economically attractive. Overall, integrating waste-derived catalysts with optimized deoxygenation technology provides a sustainable and profitable solution.
Sistem Pendukung Keputusan Evaluasi Kinerja Safety Management System di Bandara menggunakan Metode DEMATEL dan ANP Rolita, Lisa; Anggoro, Didi Dwi; Indriyantho, Bobby Rio
Jurnal Profesi Insinyur Indonesia Vol 3, No 2 (2025): JPII
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpii.2025.26844

Abstract

Berdasarkan Peraturan Menteri Perhubungan Nomor KM. 20 Tahun 2009 tentang Sistem Manajemen Keselamatan (Safety Management System), penyedia layanan penerbangan harus menerapkan Safety Management System untuk mengenali ancaman keselamatan dan mengurangi risiko, mempertahankan suatu tingkat keselamatan yang dapat diterima dan dilaksanakan, menyediakan pengamatan dan penilaian tingkat keselamatan agar tercapainya tujuan peningkatan tingkat keselamatan secara menyeluruh. Untuk meningkatkan kinerja Safety Management System pada bandara, perlu dilakukan evaluasi untuk memperbaiki kekurangan dan memastikan kualitas keselamatan secara optimal. Penelitian ini mengintegrasikan metode DEMATEL dan ANP pada Sistem Pendukung Keputusan dalam menganalisis hubungan sebab-akibat dari kriteria yang bertujuan untuk membantu stakeholder dalam mengambil keputusan. Metode yang digunakan dalan penelitian menerapkan metode kualitatif melalui kuesioner online dan diproses untuk menentukan hasil penilaian dari subkriteria. Metode DEMATEL membantu mengidentifikasi hubungan antar kriteria, serta metode ANP membantu menentukan pembobotan dari subkriteria. Studi kasus dilakukan pada bandara Ahmad Yani Semarang dengan hasil evaluasi menunjukkan bahwa penilaian tertinggi adalah kebijakan keselamatan dan tujuan, sedangkan penilaian terendah pada subkriteria pendidikan dan/atau pelatihan, sehingga menjadikan subkriteria ini menjadi prioritas yang perlu diperbaiki dalam kinerja Safety Management System bandara tersebut. Kata kunci: Sistem Pendukung Keputusan, Safety Management System, Bandara, DEMATEL, ANP
Recent Advances in Catalytic Systems for the Sustainable Synthesis of Ethyl Levulinate from Biomass Mhd. Shaumi Al Anshar; Luqman Buchori; Didi Dwi Anggoro; Setia Budi Sasongko; Istadi
Advance Sustainable Science Engineering and Technology Vol. 7 No. 3 (2025): May - July
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v7i3.1973

Abstract

The esterification of levulinic acid to ethyl levulinate presents challenges in catalyst efficiency, reusability, and environmentally friendly process design, restricting commercial scalability.  This study examines recent studies on diverse catalysts, including Deep Eutectic Solvents (DES), homogeneous and heterogeneous systems, and their effects on yield.  DES is positioned as a more sustainable option, with yields as high as 99.8%, quicker reaction times, and a lower environmental effect.  While heterogeneous catalysts require harsher conditions and have reusability difficulties, DES provides a greener and more efficient alternative to produce ethyl levulinate.  Life cycle assessments (LCA) of DES procedures reveal reductions in energy usage and greenhouse gas emissions of up to 69.72%.  Future research should focus on improving DES recovery and scalability for industrial applications.  This effort supports the United Nations' Sustainable Development Goals (SDGs), namely SDG 7 (Affordable and Clean Energy), SDG 12 (Responsible Consumption and Production), and SDG 13 (Climate Action).
Hybrid Ultrasound and Advanced Oxidation Process Regeneration of Spent FCC Catalysts: Optimization and Their Catalytic Performance Anggoro, Didi Dwi; Buchori , Luqman; Rinaldi, Nino; Silviana , Silviana; Le Monde, Brilliant Umara; Putra, Muhammad Fadila; Zainol, Muzakkir Mohamad
Journal of Engineering and Technological Sciences Vol. 58 No. 2 (2026): Vol. 58 No. 2 (2026): April
Publisher : Directorate for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2026.58.2.6

Abstract

This study investigated the regeneration of spent fluid catalytic cracking (FCC) catalysts, which become inactive due to the accumulation of poisons at active sites. The objective of the study was to enhance acidity by regenerating spent FCC catalysts through ultrasonic and oxidation processes (UAOPs) and evaluate their effectiveness in synthesizing glycerol monostearate (GMS). The results demonstrate that spent FCC catalysts regenerated with UAOPs can significantly increase catalyst acidity, which plays a crucial role in GMS synthesis. The optimal conditions identified were temperature X1 (60 °C), regeneration time X2 (50 minutes), and flow rate X3 (9 L/h). This optimization was conducted using the Statistica 10 software, resulting in an optimal acidity value of 0.08460 mmol/gram. The GMS yield achieved was 25.33%, which was slightly higher than the yield reported in previous studies utilizing ZSM-5 and dealuminated Y catalysts for the synthesis of glycerol monostearate. Overall, this study suggests that spent FCC catalysts have potential applications in GMS synthesis
Kajian Potensi Emisi Pemanfaatan Lumpur dari Instalasi Pengolahan Limbah Cair Industri Tahu Menggunakan Black Soldier Fly (BSF) dengan Metode Life Cycle Assessment (LCA) Ikhlas, Nurani; Anggoro, Didi Dwi; Huboyo, Haryono Setiyo
Jurnal Profesi Insinyur Indonesia Vol 3, No 3 (2025): JPII:
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpii.2025.26873

Abstract

Kajian ini dilakukan untuk mengevaluasi potensi emisi atau dampak lingkungan dari pengolahan lumpur dari limbah cair industri tahu menggunakan black soldier fly (BSF) sebagai larva yang mengolah lumpur tersebut. Hal ini dilakukan atas dasar adanya potensi lumpur yang kaya nutrien seperti lumpur limbah tahu yang mampu merusak dan mengkontaminasi lingkungan. BSF, dalam hal ini, dapat menjadi biokonverter yang merombak senyawa organik menjadi biomassa. Pada kajian ini, life cycle assessment atau LCA digunakan sebagai metode dasar untuk menilai dampak lingkungan dari budidaya maggot di mana fokus kategorinya pada 5 kategori utama yang sering digunakan meliputi asidifikasi, eutrofikasi, potensi pemanasan global, penurunan abiotik dan penipisan lapisan ozon. Unit fungsi yang digunakan adalah 2,5 kg lumpur dan 1 kg sampah makanan yang digunakan sebagai umpan. Hasil penelitian menunjukkan bahwa unit proses transportasi merupakan penyumbang emisi terbesar dalam aktivitas biokonversi menggunakan BSF. Selain itu, proses pengeringan dan fase biokonversi BSF juga berkontribusi cukup besar menghasilkan emisi dalam proses secara keseluruhan. Hasil studi menunjukkan bahwa biokonversi BSF merupakan salah satu metode pengolahan sampah organik yang cukup efektif dan mampu mendukung prinsip ekonomi berkelanjutan. Kata kunci: black soldier fly, kajian daur hidup, lumpur limbah tahu, global warming potential
Penerapan Lalu Lintas Sistem Satu Arah Sebagai Upaya Peningkatan Jalan Ahmad Yani Kota Tegal Prihiyandhoko, Hageng; Nugroho, Agung; Anggoro, Didi Dwi
Jurnal Profesi Insinyur Indonesia Vol 3, No 3 (2025): JPII:
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpii.2024.21304

Abstract

Pemerintah Kota Tegal memperbaiki ruas Jalan Ahmad Yani sepanjang 760 meter dengan mengusung konsep "Tegal City Walk" pada tahun 2021. Setelah dua tahun implementasi manajemen rekayasa lalu lintas Sistem Satu Arah (SSA), evaluasi harus dilakukan pada tahun 2023 untuk mengetahui efektivitas penerapan Sistem Satu Arah (SSA). Penelitian ini bertujuan untuk mengetahui beberapa hal terkait penerapan Sistem Satu Arah (SSA) pada Jalan Ahmad Yani Kota Tegal, analisis kinerja lalu lintas dilakukan pada kondisi saat ini untuk mengetahui dan memahami masalah lalu lintas di area penelitian. Data yang diambil pada survei penelitian kemudian dianalisis menggunakan Manual Kapasitas Jalan Indonesia (MKJI) Tahun 1997 sehingga didapatkan kapasitas ruas jalan (C) sebesar 1.407 smp/jam. Volume kendaraan pada akhir pekan sebesar 835 smp/jam pada jam sibuk pagi, pada jam sibuk siang sebesar 928 smp/jam dan 675 smp/jam pada jam sibuk sore dengan derajat kejenuhan (DS) 0,59 pada jam sibuk pagi, 0,66 pada jam sibuk siang dan 0,46 pada jam sibuk sore. Berdasarkan nilai derajat kejenuhan (DS) tersebut  maka Jalan Ahmad Yani Kota Tegal masuk dalam karakteristik tingkat pelayanan C di mana arus lalu lintas stabil dan kecepatan, gerak kendaraan dapat dikendalikan serta pengemudi dibatasi dalam memilih kecepatan karena masih ruas jalan perkotaan. Kata kunci: sistem satu arah, MKJI 1997, derajat kejenuhan, kinerja lalu lintas, kapasitas jalan
Co-Authors Afriza Ni&#039;matus Sa&#039;adah Aji Prasetyaningrum Andri Cahyo Kumoro Anindita Indriana Anisa Widia Utami Antonio Giovanno Aprilina Purbasari Arif Budiarto Asep Muhamad Samsudin, Asep Muhamad Asmadi, Mohd Bintang Ayu Kalimantini Bobby Rio Indriyantho Buchori , Luqman Cantika Aulia Salsabila Chusnul Khotimah Diah Anggraeni Jatraningrum Dian Cahyaningrum Didik Prasetyoko Dyah Hesti Wardhani Dyah Hesti Wardhani Fachmy Adji Pangestu Setiawan Fadhil Rifqi P Faleh Setia Budi Fathoni, Moch Zaenal FatmaTsaniya Chamdani Febio Dalanta Ganish Eko Mayndra Giveni Christina Silaen H Hadiyanto Hacker, Viktor Hartati Hartati Hartuti Purnaweni Haryono Setiyo Huboyo Hassan, Abdull Hafidz Herawati Oktaviani Herawati Oktavianty Hermawan, Hermawan Herry Santosa I. Istadi Imtinan, Alifa Bakhitah Indro Sumantri Ismail, Siti Norazian Istadi Jamarudin, Aizah Kamsi Nur Oktavia Kevin Aprilio Le Monde, Brilliant Umara Luqman B Luqman Buchori Lutfi Af’idatul Kamilah Melissa Justine Renjaan Mhd. Shaumi Al Anshar Muhamad, Theobroma Guntur Nabilah, Farhanah Nasher, Kharissa Nerfiana Fradevi Nino Rinaldi Nita A Nita Aryanti Nor Aishah Saidina Amin Nor Basid Adiwibawa Prasetya Nugroho, Agung Nur Hidayati Nur Rokhati Nurani Ikhlas Nurcahyani, Septra Nurdiani, Maulida Nurushofa, Faustina Alda P Purwanto Pakpahan, Agnes J. Pakpahan, Andre W. S. Prihiyandhoko, Hageng Primasatya, Dimas Priyo Atmaji Putra, Muhammad Fadila Putri Anggraeni Resti Nur Utami Riko Rikardo Putra Riko Rikardo Putra Riskatama Atmaji Rispiandi Rispiandi Riyanto, Teguh Rohmadona H Rolita, Lisa Roschger, Michaela S Subandriyo Salsabila, Unik Hanifah Saputra, Roni Ade Sari Octavianingrum Setia Budi S Setia Budi Sasongko Setia Budi Sasongko Setiadi, Iqfan Dwi Sigit B Silviana , Silviana Silviana Silviana Slamet Supriyadi Sulardjaka Sulardjaka Teguh Riyanto Triani, Meiri Udin Mabruro Vitus Dwi Yunianto Budi Ismadi Wahyu Bahari Setianto Wahyu Bahari Setianto Wahyudi, Dhiky Wibawa, Muhammad Hanif Dzikri Wirda Udaibah Yayuk Astuti Yayuk Mundriyastutik Yusof, Nurul Asyikin Zainol, Muzakkir Mohamad Zainol, Muzakkir Mohammad Zainuddin, Kamarul Ridwan Zakaria, Zaki Yamani Zaqiyah Addarojah Zulfikar Muriadiputra