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Amaliyah Rohsari Indah Utami
Universitas Telkom
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Journal : engineering science letter

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Simulation of Updraft and Downdraft Gasification Using Computational Fluid Dynamics (CFD) for Production of Hydrogen-Rich Syngas from Cow Manure Waste Amaliyah Rohsari Indah Utami; Anindya Nabila Salma; Daffa Rayhan Betha Muchtar; Neni Sintawardani; Suwandi
Engineering Science Letter Vol. 4 No. 03 (2025): Engineering Science Letter
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/IISTR.esl.001397

Abstract

Biomass gasification offers a promising route to low‑carbon hydrogen, yet the operating conditions and reactor configuration governing hydrogen-rich syngas remain insufficiently compared across practical regimes. This study aims to quantify the effects of gasifier type (updraft vs. downdraft), operating temperature, and superficial velocity on hydrogen production performance, with emphasis on the syngas H2/CO ratio. Computational fluid dynamics simulations were implemented to model devolatilization, oxidation, and reduction pathways under steady-state assumptions, while systematically varying temperature (680-800°C) and air superficial velocity (0.0025-4 m/s). Model validation against experimental reference data demonstrated good agreement, with relative errors ranging from 5.95% to 6.93%. The results indicate that a downdraft configuration operated at 680°C and 2 m/s maximizes the H2/CO ratio, achieving a value of 2.091, outperforming alternative settings in terms of hydrogen yield and energy efficiency, albeit with higher variability than the updraft configuration. Increasing air flow beyond this optimum diminishes the H2/CO ratio due to enhanced oxidation, whereas raising the temperature to 800°C generally reduces the average H2/CO across both configurations. These findings establish a practical operating window for hydrogen‑rich syngas from livestock waste and highlight the need for rigorous process control to manage variability in downdraft operation. The study provides evidence-based guidance for gasifier design and operation, aiming to achieve efficient and renewable hydrogen production.
Co-Authors Adam Zakiy Hizbullah Adi, Yeremia Kristianto Ahmad Harun Firdaus Ahmad Qurthobi Ahmad Qurthobi Alit Munawar Holil Alvin Hizra Muhammad Andre Swardana Anindya Nabila Salma Anindya Nabila Salma Arfandi, Rizky Nurfadillah Asep Suhendi Asep Suhendi Aulya Sholehah Wataawa Sau Bhis Sobri Avianto, Luthfi Wigi Bayu Setiawan Berna Wahyu Setiawan Chalila Ichwania Daffa Rayhan Betha Muchtar Daffa Rayhan Betha Muchtar Davianti, Ajeng Faradilla Putri Ditia, Anissa Diva, Shaina Diyana Afdhila Eka Triwahyuni, Eka Erni Dwi Sumaryatie Erni Dwi Sumaryatie Ery Djunaedy Ghassani, Deika Saffanah Nisyyah Hafidah, Fiolyta Hapsah Aulia Azzahra Hertiana Bethaningtyas Dyah Kusumaningrum Ian Hariananda Ihsan Maulidin Ihsan Maulidin Ihsan Maulidin Indra Chandra Indra Chandra Indra Wahyudin Fathonah Linahtadiya Andiani Lutfi Ikbal Majid Mamat Rokhmat Mamat Rokhmat Maryana, Roni Maulana Afchor Aulia Maulidin, Ihsan Melania Suweni Muntini Mubarak, Luthfi Rizqi Muhamad Ramdlan Kirom Muhammad Zahid Hibaturrahman Muryanto Muryanto, Muryanto Muthmainnah, Melania Suweni Muntini Natanael Antonius Neni Sintawardani Neni Sintawardani Nurwulan Fitriyanti Putri, Monica Tri Buana Rachmawati, Lulu Millatina Rais Nurdimansyah Rasyid, Tazlila Rahmi Reza Ayu Febriana Rosalia Mustika Hermawati Septian Nur Hiadayat Septiana Dwika Pangestu Sugiwati, Sri Suprayogi Suprayogi Suprayogi Suprayogi Suwandi Suwandi Suwandi Suwandi Suwandi Suwandi Suwandi Suwandi Tania Verasta Tania Verasta Tania Verasta Tesla Pinantun Hamonangan Teuku Beuna Bardant Theresia Deviyana Gunawan Theresia Deviyana Gunawan Triwikantoro Triwikantoro Triwikantoro Triwikantoro Ventiano Ventiano Wahyu Sujatmiko Yan Irawan Yanni Sudiyani Yeremia Kristianto Adi Yogathama Arif Kurniawan