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All Journal International Journal of Renewable Energy Development Pedagogia: Jurnal Pendidikan International Journal of Renewable Energy Development
M. Sofyan
Department of Chemical Engineering Faculty of Engineering, Diponegoro University, Jl Prof H. Soedharto, Tembalang, Semarang
Chemistry Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Other

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Biodiesel Production from Kapok (Ceiba pentandra) Seed Oil using Naturally Alkaline Catalyst as an Effort of Green Energy and Technology Handayani, N.A.; Santosa, H.; Sofyan, M.; Tanjung, I.; Chyntia, A.; Putri, P.A.R.S.; Ramadhan, Z.R.
International Journal of Renewable Energy Development Vol 2, No 3 (2013): October 2013
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2.3.169-173

Abstract

Nowadays, energy that used to serve all the needs of community, mainly generated from fossil (conventional energy). Terrace in energy consumption is not balanced with adequate fossil fuel reserves and will be totally depleted in the near future. Indonesian Government through a Presidential Decree No. 5 year 2006 mandates an increased capacity in renewable energy production from 5 percent to 15 percent in 2025. C. pentandra seed oil has feasibility as a sustainable biodiesel feedstock in Indonesia. The aim of this paper was to investigate biodiesel production from ceiba petandra seed oil using naturally potassium hydroxide catalyst. Research designs are based on factorial design with 2 levels and 3 independent variables (temperature, reaction time and molar ratio of methanol to oil). According to data calculation, the most influential single variable is molar ratio of methanol to oil. Characterization of biodiesel products meet all the qualifications standardized by SNI 04-7182-2006. 
Interactive Excel E-Module for Grade VII Informatics Learning Sofyan, M.; Haris , Celine Aloyshima
Pedagogia : Jurnal Pendidikan Vol. 14 No. 2 (2025): August
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/pedagogia.v14i2.1953

Abstract

This research aims to develop e-modules for seventh grade Informatics subject on Excel introduction material and evaluate teacher and learner responses using the 4D development model. The defining stage includes initial analysis, learner analysis, and preparation of learning objectives, which show the need for e-modules because there are no special modules available and only rely on online materials. The e-module design is organized according to the learning outcomes of Merdeka Curriculum and packaged in an attractive format using Word, Canva, and Flip PDF Corporate, complete with text, videos, and quizzes. Validation by three media experts and one material expert resulted in an average score of 80.58% (“Valid”), so the product was fully developed and published electronically. Responses to the e-module were collected from one teacher and 74 students, with results of 92.5% for teachers and 83% for learners-both rated “Excellent”. The e-module was further disseminated through links and QR codes. Although the technical use of the free Flip PDF to bring up watermarks and coordination during response collection was difficult, this product proved to be effective, innovative, and feasible to use in informatics learning. Highlights: Needs-Based Design – Developed due to lack of specific Excel modules. Validated & Rated Excellent – Expert and user evaluations showed high effectiveness. Multimedia Integration – Included videos, quizzes, and engaging formats for better learning. Keywords: E-Module Development, Informatics Learning, Merdeka Curriculum, Flip PDF, Student Engagement
Biodiesel Production from Kapok (Ceiba pentandra) Seed Oil using Naturally Alkaline Catalyst as an Effort of Green Energy and Technology Handayani, N.A.; Santosa, H.; Sofyan, M.; Tanjung, I.; Chyntia, A.; Putri, P.A.R.S.; Ramadhan, Z.R.
International Journal of Renewable Energy Development Vol 2, No 3 (2013): October 2013
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2.3.169-173

Abstract

Nowadays, energy that used to serve all the needs of community, mainly generated from fossil (conventional energy). Terrace in energy consumption is not balanced with adequate fossil fuel reserves and will be totally depleted in the near future. Indonesian Government through a Presidential Decree No. 5 year 2006 mandates an increased capacity in renewable energy production from 5 percent to 15 percent in 2025. C. pentandra seed oil has feasibility as a sustainable biodiesel feedstock in Indonesia. The aim of this paper was to investigate biodiesel production from ceiba petandra seed oil using naturally potassium hydroxide catalyst. Research designs are based on factorial design with 2 levels and 3 independent variables (temperature, reaction time and molar ratio of methanol to oil). According to data calculation, the most influential single variable is molar ratio of methanol to oil. Characterization of biodiesel products meet all the qualifications standardized by SNI 04-7182-2006. 
Co-Authors A. Chyntia H. Santosa Haris , Celine Aloyshima I. Tanjung N.A. Handayani P.A.R.S. Putri Z.R. Ramadhan