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Jurnal Pendidikan Kimia (JPKim)
Published by Universitas Negeri Medan
ISSN : 20853653     EISSN : 25493116     DOI : 10.24114
Core Subject : Science, Education, Social,
Biochemistry, Genetics & Molecular Biology Chemistry Education Environmental Science
Jurnal Pendidikan Kimia (JPKim) yang dikelola Program Pascasarjana Universitas Negeri Medan terbit 3 kali setahun, yakni bulan April, Agustus dan Desember. JPKim menerbitkan artikel ilmiah hasil-hasil penelitian pendidikan kimia dan kimia fundamental. JPKim juga menerbitkan artikel Review terkait Pendidikan Kimia dan Kimia.
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Articles 12 Documents
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Search results for , issue "Vol 15, No 2 (2023): August" : 12 Documents clear
Scientific attitudes in chemistry learning: A systematic literature review Intan Shanderi; Suwardi Suwardi
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 2 (2023): August
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v15i2.48881

Abstract

This systematic review analysis study aimed to examine the scientific attitudes in chemistry learning. The method used a Systematic Literature Review which consists of 5 stages adopted from Denyer and Tranfield. The main criteria for the selection of articles are scientific attitude in the field of chemistry learning with a period of 2012 until 2023 from the well-known national and international database. There were 29 articles were obtained that fit into the criteria. The article’s aspect focused on the parameters such as aim, sample level, instructional method, instruments, and chemistry subject. The result showed that the attitude scale is the most instrument that can be used to measure scientific attitude in chemistry learning. Meanwhile, PBL has become the most instructional method that has been used to enhance scientific attitude. Moreover, the studies mostly aim to investigate the influence of teaching methods on scientific attitudes. Most researchers involve high school students in scientific attitude research on analytical chemistry concepts. There are different codes for each theme of scientific attitudes. Thus, the review helps to evaluate the instrument and instructional methods in chemistry learning and also provides recommendations for examining students’ scientific attitudes in further explorations.Keywords: Chemistry learning; Instructional method; Instrument; Scientific attitudes
Unveiling ZrO2/natural zeolite catalytic performance on hydrocracking palm oil mill effluent residue Junifa Layla Sihombing; Herlinawati Herlinawati; Ahmad Nasir Pulungan; Agus Kembaren; Gimelliya Saragih; Harmileni Harmileni; Rahayu Rahayu; Ary Anggara Wibowo
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 2 (2023): August
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v15i2.43324

Abstract

Palm oil mill effluent (POME) is the largest liquid waste from crude palm oil production. This liquid waste still contains a lot of chemical components, solid deposits, and oil which is dangerous if released directly into the environment. The residual oil and grease components contained in POME can be further extracted and converted into fuel fractions. This study investigates the conversion of residual oil from POME into fuel fractions through hydrocracking. A ZrO2/Sarulla natural zeolite (SNZ) catalyst was used, characterized by a particle size of 1-1.5 µm, a surface area of 73.3 m2/g, a pore volume of 0.161 cc/g, and a pore diameter of 3.35 nm. The effect of catalyst mass was studied, with the total conversion increasing to a certain extent with increasing catalyst mass, however, an increase in coke formation decreased the product yield. The highest gasoline fraction selectivity was obtained with a catalyst mass of 0.09 wt% (~42%), while the kerosene fraction was most obtained with a catalyst mass of 0.15 wt% (~40%). The liquid product with a catalyst mass of 0.15 wt% had the highest HHV of 44.2 MJ/kg, a 12% increase from the HHV of POME oil residue (39.4 MJ/kg). The results demonstrate the potential of using residual oil from POME as a source for fuel production and the use of natural zeolite-based catalysts as hydrocracking catalysts.Keywords: Biofuel; Hydrocracking; Natural zeolite; Oil extracted; Palm oil mill effluent

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