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All Journal Journal of Education Technology International Journal of Renewable Energy Development
Zakaria, Zaki Yamani
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Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering

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Pedagogical Framework to Fulfill and Improve the Understanding of Capstone Design Engineering Among STEM Graduates – A Mini Review Pauzi, Aziah; Kasim, Farizul Hafiz; Zakaria, Zaki Yamani
Journal of Education Technology Vol. 8 No. 3 (2024): August
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jet.v8i3.76314

Abstract

In the challenging 21st century learning environment, there is an increasing need to ensure that engineers can solve new and difficult engineering challenges. So it is important to update engineering education to produce engineers who can solve problems and work in today's environment. The problem underlying this research is the existence of weaknesses in the learning of design project courses or integrated design engineering courses in chemical engineering and it is very important to provide support for student understanding and achievement of program outcomes. This study aims to shape, build and assess teaching and learning models for chemical engineering design projects by exploring teaching pedagogy. This research is a basic research that uses a design and development approach based on the ADDIE model. Therefore, it is highly hoped that this investigation can provide input on more effective learning models. The population of this study was final year students at the Faculty of Chemical Engineering & Technology, and 9 expert teaching staff from most universities throughout the country. In conclusion, the application of this model is expected to provide opportunities and guidance to interested parties including lecturers, teachers and students to improve their skills and abilities in solving complex engineering problems in design project courses in the future.
Integrated Assessment for Introduction to Engineering, Industrial Seminar and Profession and Introduction to Computer Programming Courses Zakaria, Zaki Yamani; Sadikin, Aziatul Niza; Hasim, Mimi Haryani; Yunos, Nor Alafiza; Rosli, Aishah; Che Man, Siti Hajjar; Hasbullah, Hasrinah; Mohd Yusof, Khairiyah
Journal of Education Technology Vol. 8 No. 3 (2024): August
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jet.v8i3.76322

Abstract

This study highlights the challenges faced in integrating first-year chemical engineering courses, namely Introduction to Engineering, Industrial and Professional Seminar, and Introduction to Computer Programming. The main challenge lies in effective integrated assessment, especially in ensuring that students understand the interrelationships between the various disciplines and their applications in real-world contexts. The study aims to develop an effective integrated assessment model based on constructive alignment to support student learning in the three courses, with a focus on solving authentic problems related to sustainability. The courses are designed with an integrated assessment approach through project reports, exhibitions, reflection journals, and learning portfolios. Real-world problems relevant to sustainability are used as the main theme, and assessments are conducted both formatively and summatively to measure learning success. This integrated assessment has succeeded in improving students' skills in critical thinking, communication, and technical abilities. Positive feedback from students and expert panels indicates that this assessment model is effective in connecting the various disciplines and preparing students for real-world challenges.
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.
Co-Authors Che Man, Siti Hajjar Didi Dwi Anggoro Didik Prasetyoko Hartati Hartati Hasbullah, Hasrinah Hasim, Mimi Haryani Kasim, Farizul Hafiz Le Monde, Brilliant Umara Mohd Yusof, Khairiyah Nurdiani, Maulida Pauzi, Aziah Rosli, Aishah Sadikin, Aziatul Niza Yunos, Nor Alafiza