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All Journal Logistic and Operation Management Research Polyhedron International Journal in Mathematics Education
Abubakar, Abdulhalim
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Decision Sciences, Operations Research & Management Education Mathematics

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Optimized Production of High Purity Sulphuric Acid via Contact Process Mperiju, Thlama; Sylvain, Tome; Arowo, Moses NyoTonglo; Dhanda, Tilak; Abubakar, Abdulhalim; Goriya, Babakaumi Ahmadu; Zakariyyah Abdul, Aminullah
Logistic and Operation Management Research (LOMR) Vol. 2 No. 1 (2023): Logistic and Operation Management Research (LOMR)
Publisher : Research Synergy Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31098/lomr.v2i1.1436

Abstract

Sulphuric acid (H2SO4) is of immense importance to the chemical industry and humanity. The use of Aspen Plus modeling, simulation, and optimization via the contact process has enabled the production of grade sulphuric acid. Notably, the research findings highlight the sensitivity of water flow rate to the maximization of H2SO4 production. Through these methods, a production capacity of around 8 tons per day was achieved, with a purity level of 98.9%. This achievement significantly contributes to meeting the demand for sulphuric acid in various industries. Moreover, exploring alternative sourcing methods, such as utilizing elemental sulphur, offers the potential for further optimizing H2SO4 production. The benefits of improving H2SO4 production extend beyond the chemical industry. Sulphuric acid finds applications in agriculture, petroleum refining, pharmaceuticals, and metal processing. Enhancing the production process ensures a reliable supply for these sectors. In summary, sulphuric acid is indispensable to the chemical industry and humanity at large. Aspen Plus modeling and optimization techniques have successfully improved the production of high-grade sulphuric acid, resulting in increased capacity and purity. Exploring alternative sourcing methods further enhances production possibilities. These advancements have wide-ranging implications, benefiting multiple industries and driving progress in sectors reliant on sulphuric acid.
Ways of thinking 3D geometry: exploratory case study in junior high school students Sudirman, Sudirman; Andrés Rodríguez-Nieto, Camilo; Bongani Dhlamini, Zwelithini; Singh Chauhan, Alok; Baltaeva, Umida; Abubakar, Abdulhalim; O. Dejarlo, Jenisus; Andriani, Mela
Polyhedron International Journal in Mathematics Education Vol. 1 No. 1 (2023): pijme
Publisher : Nashir Al-Kutub Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59965/pijme.v1i1.5

Abstract

Each student has their own characteristics and way of doing 3D geometric thinking. The way of thinking that students do influences the resulting understanding of the concept of 3D geometry. Therefore, this study aims to investigate students' geometric thinking based on the level of achievement of students in completing the 3D geometric thinking ability test (3D GTA). This study uses an exploratory case study design. The participants who voluntarily participated were 33 junior high school students (14 boys, 19 girls) in one of the schools in Indramayu Regency, Indonesia. Data obtained from the process of observation, tests, interviews, and documentation were analyzed qualitatively using Atlas. ti 8 software. The findings revealed that students with low 3D GTA achievements experienced difficulties in representing and calculating the surface area and volume of 3D shapes. In addition, students with moderate 3D GTA achievements experienced difficulties in representing 3D shapes but were able to translate 2D shapes from 3D shapes. Furthermore, students with high 3D GTA achievements experienced difficulties in calculating the surface area and volume of 3D shapes, but were able to use appropriate formulas and were able to interpret the comparisons of 3D geometric shapes well. The results of this study have implications for helping teachers identify student characteristics in understanding the concept of 3D geometry and connections with 2D geometry.
Co-Authors Andrés Rodríguez-Nieto, Camilo Andriani, Mela Arowo, Moses NyoTonglo Baltaeva, Umida Bongani Dhlamini, Zwelithini Dhanda, Tilak Goriya, Babakaumi Ahmadu Mperiju, Thlama O. Dejarlo, Jenisus Singh Chauhan, Alok Sudirman Sylvain, Tome Zakariyyah Abdul, Aminullah