cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Dessy Ariyanti
Contact Email
dessy.ariyanti@che.undip.ac.id
Phone
+62247460058
Journal Mail Official
j.reaktor@che.undip.ac.id
Editorial Address
Department of Chemical Engineering, Diponegoro University Jl. Prof. Soedarto SH Tembalang Semarang 50275
Location
Kota semarang,
Jawa tengah
INDONESIA
Reaktor
Published by Universitas Diponegoro
ISSN : 08520798     EISSN : 24075973     DOI : https://doi.org/10.14710/reaktor.xx.x.xx-xx
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Materials Science & Nanotechnology
Reaktor invites contributions of original and novel fundamental research. Reaktor publishes scientific study/ research papers, industrial problem solving related to Chemical Engineering field as well as review papers. The journal presents paper dealing with the topic related to Chemical Engineering including: Transport Phenomena and Chemical Engineering Operating Unit Chemical Reaction Technique, Chemical Kinetics, and Catalysis Designing, Modeling, and Process Optimization Energy and Conversion Technology Thermodynamics Process System Engineering and products Particulate and emulsion technologies Membrane Technology Material Development Food Technology and Bioprocess Waste Treatment Technology
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 5 Documents
 1 
Search results for , issue "Volume 24 No.3 December 2024" : 5 Documents clear
Extraction of Scandium and Removal of Iron from Bauxite Residue using Hydrochloric Acid Solution with/without Addition of EDTA Sitorus, Berlian; Reva, Mincen; Syahbanu, Intan
Reaktor Volume 24 No.3 December 2024
Publisher : Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.24.3.76-81

Abstract

Scandium (Sc) is a strategic metal for its increasing demand for advanced materials applications. As a by-product of alumina production, bauxite residues possess a potential source of Sc. However, its high iron content hinders the Sc extraction efficiency. This study investigated the feasibility of Sc extraction from bauxite residue using hydrochloric acid (HCl) leaching process, with and without the addition of ethylenediaminetetraacetic acid (EDTA) as a chelating agent. Bauxite residue samples were characterized for their elemental composition using the X-ray fluorescence (XRF) spectroscopy. Subsequently, leaching experiments were conducted using 6M and 9M HCl solutions. The effect of EDTA on Sc extraction yield and iron dissolution was assessed. The XRF analysis revealed a significant iron content in the bauxite residue, confirming the need for effective iron removal. Hydrochloric acid was found to be effective in leaching iron (Fe) from bauxite residue, as confirmed by the high Fe content in the leachate, and a higher HCl concentration led to a higher Sc2O3 concentration in the residue. Although the addition of EDTA was effective in chelating iron, it also reduced Sc extraction efficiency. The leaching results suggested the use of 9M HCl without the addition of EDTA as the best leaching solution for Sc extraction, yielding a higher Sc recovery compared to extractions using 6M HCl and EDTA. These findings contribute to the understanding of Sc extraction from bauxite residue and provide valuable insights for developing efficient and sustainable recovery processes.
Effect of Freeze-Drying Pre-treatment on the Properties of Activated Carbon Derived from Arabica Coffee Pulp Effendy, Ahmad Hidayat; Setiawan, Adi; Dewi, Rozanna; Hakim, Lukman; Hasibuan, Rizqon
Reaktor Volume 24 No.3 December 2024
Publisher : Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.24.3.82-93

Abstract

Activated carbon is a product that has many benefits since it has a high surface area and high fixed carbon content. Currently, there is still limited research that focuses on the use of coffee pulp biomass as raw material for activated carbon due to its natural properties which poses challanges. The aim of this research is to examine the influence of the pre-treatment process using the freeze-drying method on the properties of active carbon from coffee pulp waste. The best-activated carbon products can then be applied as energy storage materials. The steps taken in this study include stages (i) washing and soaking the raw materials; (ii) drying using the freeze-drying method; (iii) pyrolysis process; and (iv) activation process. Some samples were chemically activated using a KOH solution, some were physically activated using Nitrogen at a temperature of 800 °C, and the others were activated using a mixed chemical-physical method. The results of the activated carbon characteristic test show that samples dried using a freeze dryer have quite good thermal resistance with a surface morphology that has more pores. This is supported by functional group analysis which shows a reduction in unnecessary sample compounds. This research shows that freeze-drying pre-treatment affects the properties of activated carbon and indicates that the resulting activated carbon can be used as an energy storage material.
Effect of HPMC Concentration and Liquid Addition Method on granules properties using High-Shear Wet Granulator waleed, shahad qutaiba
Reaktor Volume 24 No.3 December 2024
Publisher : Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.24.3.102-108

Abstract

Enhancing the physical properties of medicinal powders is largely dependent on the granulation process. This study investigates how the concentration of hydroxypropyl methylcellulose (HPMC) and the liquid addition technique (pouring versus syringe) interact to affect the distribution of granule sizes and its porosity  in a high-shear mixer setup. Both a 5% HPMC solution and distilled water (0% HPMC) were used to granulate calcium carbonate powder. The results showed that while excessive liquid addition using the pouring method led to uneven growth and agglomeration, an increase in binder viscosity improved granule homogeneity. On the other hand, the syringe method provided more uniform granules, showing its effectiveness in achieving controlled nucleation and growth. The impact of these parameters on granule characteristics was further supported by the design of response surface plots and models made easier by statistical analysis using Design-Expert software. The study's findings provide important information for improving wet granulation methods in the manufacturing of pharmaceuticals, especially with regards to guaranteeing the stability and uniformity of the final product.
Synthesis of Poly(NIPAM) for Efficient Trypsin Purification Using Affinity Precipitation Technique Syaubari, Syaubari; Bachtiar, Dandi; Sabrina, Nur Irhamni; Adhi, M Furqan
Reaktor Volume 24 No.3 December 2024
Publisher : Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.24.3.109-115

Abstract

The method of bio specific affinity for separation has gained attention and continues to be developed today. The affinity precipitation technique is continuously being refined because it is simpler, less complex, and highly economical without reducing product purity. Moreover, the obtained polymers can be reused and easily scaled up. The polymer used for affinity precipitation has functional groups that can act specifically, making it known as a “smart polymer.” The hydrophilic polymer and soluble liquid can be replaced with hydrophobic ones, becoming insoluble under certain conditions such as changes in pH, temperature, ionic strength, or the addition of reagents. This study aims to utilize ligand pairs for soluble liquid polymers based on macro ligands that are easily developed for large-scale applications. The research was conducted in two stages and is ready for enzyme purification testing. First, the synthesis of NIPAM polymer was carried out, with NIPAM and AIBN as fixed variables, while MPA served as the variable. Second, PABA conjugation was performed, where the synthesized NIPAM polymer was conjugated with the PABA ligand, making PABA characterization the changing variable in this phase. The dry weight of carboxylated Poly(NIPAM) obtained was 91.3%, carboxylated Poly(NIPAM)-co MPA 0.4 was 90.4%, and carboxylated Poly(NIPAM)-co MPA 0.6 was 88.9%. In the SEM test, the morphological structure of Poly(NIPAM) showed relatively harder surfaces. In the FTIR test, a significant change was observed in the spectra at 3300-2500 cm-1, which became weaker due to the presence of carboxyl groups characterized in Poly(NIPAM). The spectrophotometer test revealed the LCST condition at a temperature of 40°C. The conjugation of PABA onto Poly(NIPAM)-co-MPA 0.6 with 50 mg PABA showed better conjugation efficiency, with a conjugation yield of 52.6%. Incorporation of PABA shows recovery of trypsin between 65-80 %.
Breaking Boundaries in Renewable Energy: Portable Bio-Photovoltaic Systems for the IoT Era Nur, Muhamad Maulana Azimatun; Dellarohita, Shinta Justicia; Syakira, Salsabila Fara
Reaktor Volume 24 No.3 December 2024
Publisher : Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.24.3.94-101

Abstract

Bio-photovoltaic (BPV) technology represents a promising innovation in renewable energy by harnessing photosynthetic microorganisms, such as microalgae and cyanobacteria, to convert solar energy into electricity. This review examines recent advancements in BPV systems, with a focus on portable applications, immobilization techniques, and hybrid system integrations. The study highlights the critical role of advanced materials, such as graphene and carbon nanotubes, in improving electron transfer efficiency and system performance. Additionally, immobilization strategies using natural polysaccharides like sodium alginate and agar are discussed for their contributions to system stability and scalability. Portable BPV systems have emerged as sustainable solutions for decentralized energy needs, including environmental monitoring and IoT-based applications. Despite their potential, challenges remain in optimizing energy output, improving long-term stability, and reducing production costs. Future directions include the integration of nanotechnology, genetic engineering of microorganisms, and hybrid BPV-solar systems to enhance overall efficiency and expand application scope. This review underscores the transformative potential of BPV technology in achieving sustainable energy goals while addressing global challenges in energy access and environmental conservation. With continued innovation and multidisciplinary collaboration, BPV systems could play a vital role in transitioning toward a cleaner and more resilient energy future.Keywords: Bio-Photovoltaic; Microalgae; Renewable Energy; Portable Systems; Hybrid BPV-Solar Systems; Nanotechnology Integration.

Page 1 of 1 | Total Record : 5

 1 

Filter by Year

2024 2024


Reset
Filter By Issues
All Issue Volume 25 No.1 April 2025 2025: Just Accepted and Article in Press Volume 24 No.3 December 2024 Volume 24 No.2 August 2024 Volume 24 No.1 April 2024 Volume 23 No.3 December 2023 Volume 23 No.2 August 2023 Volume 23 No.1 April 2023 Volume 22 No. 3 December 2022 Volume 22 No.2 August 2022 Volume 22 No. 1 April 2022 Volume 21 No.4 December 2021 Volume 21 No. 3 September 2021 Volume 21 No. 2 June 2021 Volume 21 No. 1 March 2021 Volume 20 No.4 December 2020 Volume 20 No.3 September 2020 Volume 20 No.2 June 2020 Volume 20 No.1 March 2020 Volume 19 No. 4 December 2019 Volume 19 No. 3 September 2019 Volume 19 No. 2 June 2019 Volume 19 No. 1 March 2019 Volume 18 No. 4 December 2018 Volume 18 No. 3 September 2018 Volume 18 No. 2 June 2018 Volume 18 No. 1 March 2018 Volume 17 No. 4 Desember 2017 Volume 17 No. 3 September 2017 Volume 17 No. 2 Juni 2017 Volume 17 No.1 Maret 2017 Volume 16 No.4 Desember 2016 Volume 16 No.3 September 2016 Volume 16 No. 2 Juni 2016 Volume 16 No.1 Maret 2016 Volume 15 No.4 Oktober 2015 Volume 15 No.3 April 2015 Volume 15, No.2, OKTOBER 2014 Volume 15, No.1, APRIL 2014 Volume 14, No. 4, OKTOBER 2013 Volume 14, No. 3, APRIL 2013 Volume 14, Nomor 2, Oktober 2012 Volume 14, Nomor 1, April 2012 Volume 13, Nomor 4, Desember 2011 Volume 13, Nomor 3, Juni 2011 Volume 13, Nomor 2, Desember 2010 Volume 13, Nomor 1, Juni 2010 Volume 12, Nomor 4, Desember 2009 Volume 12, Nomor 3, Juni 2009 Volume 12, Nomor 2, Desember 2008 Volume 12, Nomor 1, Juni 2008 Volume 11, Nomor 2, Desember 2007 Volume 11, Nomor 1, Juni 2007 Volume 10, Nomor 2, Desember 2006 Volume 10 No. 1 Juni 2006 Volume 09 No. 02 Desember 2005 Volume 09 No.1 Juni 2005 Volume 08 No.2 Desember 2004 Volume 08 No.1 Juni 2004 Volume 07 No.2 Desember 2003 Volume 07 No. 1 Juni 2003 Volume 6 No. 2 Desember 2002 Volume 6 No. 1 Juni 2002 Volume 5 No.2 Desember 2001 Volume 5 No. 1 Juni 2001 Volume 3 No.1 Desember 1999 More Issue