Junifa Layla Sihombing

ORCID: 0000-0001-8977-3701
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Catalysis and Hydrodesulfurization Studies
  • Biodiesel Production and Applications
  • Catalysis for Biomass Conversion
  • Thermochemical Biomass Conversion Processes
  • Biofuel production and bioconversion
  • Educational Methods and Outcomes
  • STEM Education
  • Food and Agricultural Sciences
  • Petroleum Processing and Analysis
  • Agricultural and Environmental Management
  • Zeolite Catalysis and Synthesis
  • Oil Palm Production and Sustainability
  • Natural Products and Applications
  • Catalytic Processes in Materials Science
  • Mesoporous Materials and Catalysis
  • Environmental Engineering and Cultural Studies
  • Pineapple and bromelain studies
  • Public Health and Nutrition
  • Advanced Polymer Synthesis and Characterization
  • Microplastics and Plastic Pollution
  • Heat transfer and supercritical fluids
  • Energy and Environment Impacts
  • Electrospun Nanofibers in Biomedical Applications
  • Health and Education Studies
  • COVID-19 Prevention and Impact

State University of Medan
2018-2024

University of North Sumatra
2018-2020

Centro de Ingeniería Genética y Biotecnología
2017

Bio-oil from biomass pyrolysis is promising to be used as a sustainable biofuel and high-value-added chemical. However, the presence of high acid, water, oxygenate causes corrosive properties, low higher heating value (HHV), instability bio-oil component. Therefore, refining essential improve its quality. In this study, we introduced natural zeolite (HZ) impregnated with transition metal oxide (TMO) refine using hydrodeoxygenation method (HDO) at various catalyst ratios temperatures. We find...

10.1016/j.arabjc.2023.104707 article EN cc-by-nc-nd Arabian Journal of Chemistry 2023-02-27

This research was aimed to investigate the effect of Co and Co-Mo metal loaded on Sarulla Natural Zeolite which has been activated calcined (SNZ-Cal) as supports for better understanding characterization catalytic activity hydrocracking MEFA rubber seed oil. The added through a wet impregnation method using Co(NO3)2·6H2O (NH4)·6Mo7O24·4H2O precursor salts. catalyst oxidized at 500 °C 2 h within oxygen gas flow, followed by reduction process with H2 flow similar condition obtain catalysts....

10.3390/catal10010121 article EN Catalysts 2020-01-15

Bio-oil includes significant levels of oxygenate molecules, which might induce component instability and reduce its physicochemical qualities. To counteract this, the must undergo a hydrodeoxygenation (HDO) reaction. Due to presence acidic active sites, zeolites have been shown high hydrogenation deoxygenation capabilities. However, natural zeolite has large number impurities low acidity density. Consequently, before being employed as an HDO catalyst, pretreatments such preparation...

10.18331/brj2022.9.2.4 article EN cc-by Biofuel Research Journal 2022-06-01

Rubber seeds, due to their rich vegetable oil content, emerge as a promising substrate for biofuel production. Harnessing the progressive catalytic hydrocracking methodology, this research delves into activation of Sarulla‐derived natural zeolite followed by Ni and Ni–Mo metal impregnation, subsequently subjecting rubber seed at 400, 450, 500 °C under atmospheric pressure 0.1 MPa. Zeolite characteristics undergo notable transformations postmetal impregnation. Importantly, °C, gasoline...

10.1002/ente.202301318 article EN cc-by-nc-nd Energy Technology 2024-02-23

Keterbatasan pasokan air bersih untuk memenuhi kebutuhan masyarakat menjadi kendala utama yang dialami warga di Desa Sukajadi. Dengan keterbatasan pengetahuan, sarana, prasarana dan ekonomi, terus menggunakan tidak sehat rumah tangga. Oleh karena itu, sangat perlu diberi pengetahuan keterampilan pengolahan bersih. Kegiatan pengabdian kepada (PKM) dalam Pengolahan Air Bersih Sukajadi bertujuan untuk: 1) meningkatkan tentang budaya hidup bersih, 2) memberikan teknologi proses Tujuan tersebut...

10.23960/jpkmt.v2i1.23 article ID cc-by-nc-sa Jurnal Pengabdian Kepada Masyarakat (JPKM) TABIKPUN 2021-03-31

Constituents of liquid smoke possess a huge potential to be converted as value-added chemicals, such flavoring, antiseptics, antioxidants, or even fossil oil substitutes. However, instability, led by the presence oxygenate compounds, is an obstacle for further utilization and processing. On other hand, catalyst efficiency in hydrodeoxygenation (HDO) remains challenging. Sarulla natural zeolite (Z), with abundant availability, has not been comprehensively investigated catalytic performance...

10.3390/app10124126 article EN cc-by Applied Sciences 2020-06-16

This research aims to determine activities, learning outcomes and the correlation between activities student taught using Project Based Learning (PjBL) model assisted by e-modules for class X SMA on electrolyte non-electrolyte solutions. The population in this study were students of uses test non-test instruments form activity observation sheets which have been tested are valid. data obtained normality homogeneity. results processing that has analyzed, there outcome values tcount = 9.714...

10.24114/jipk.v5i2.54922 article EN Jurnal Inovasi Pembelajaran Kimia 2024-03-31

One type of aromatic polymer that has been developed widely as a proton exchange membranes (PEM) for fuel cell applications is sulfonated polystyrene (sPS).In this research, the PEM membrane was prepared through blending process (sPS) and maleated natural rubber (MNR), employing PE-g-MAH compatibilities to enhance mechanical conductivity properties.Various amounts sPS were used, namely 10%; 20%; 40% 60% ratios respectively.The performed in each dilute solution polymer, followed by steam...

10.31788/rjc.2020.1325616 article EN RASAYAN Journal of Chemistry 2020-01-01

The identification of morphology and structure Natural Zeolite from Sarulla, Tapanuli Utara, Indonesia had been conducted. X-ray diffraction (XRD) analysis indicated that the natural zeolite a difractogram peak 20-30° θ. Moreover, XRD pattern showed dominant phases were containing mordenite clinoptilolite crystal. Fourier Transform Infrared (FTIR) spectroscopy TO4 ([SiO4]−4and [AlO4]−5 groups appeared in wavenumber 1040.61 cm−1 shifted to 1053.15 after acid activation calcination process. In...

10.1063/1.5082467 article EN AIP conference proceedings 2018-01-01

The purpose of this research was to produce bio-gasoline fraction from methyl ester fatty rice bran oil through catalytic hydrocracking systems.The following method was; 1) Preparation and impregnation Ni, Co Mo metals inactivated commercial natural zeolite (CNZ-A) be NiO/CNZ-A, NiOMoO/CNZ-A NiOCoOMoO/CNZ-A, 2) Production acid (MEFA) using esterification trans-esterification process, 3) Catalytic MEFA at a temperature 350 o C, 400 C 450 respectively.Furthermore, the characterization...

10.31788/rjc.2019.1215036 article EN RASAYAN Journal of Chemistry 2019-01-01

Abstract In this study, hydrodeoxygenation (HDO) process of bio-oil from coconut shell waste was catalyzed by active Sarulla natural zeolite (ZAS) supported Co metal and a combination Co-Mo metal. The resulting HDO product is expected to have good physicochemical stability during the storage period so as increase its potential an alternative source hydrocarbon energy. Preparation activation ZAS catalyst with 3M HCl calcination N2 gas flow. Impregnation into carried out wet impregnation...

10.1088/1742-6596/2193/1/012084 article EN Journal of Physics Conference Series 2022-02-01

Rubber seeds are the waste products of rubber plantations which abundant in availability but have not been fully utilized.Rubber seed production Indonesia currently reach 5 million tons per year, with oil content 40-50% can produce 2 year [1].Therefore, has potential to be developed as a raw material for biodiesel and this process directly reduces environmental waste.However, main obstacle use making is high free fatty acid (FFA) 5-40%.Conventionally, by reacting vegetable alcohol using an...

10.15244/pjoes/135615 article EN Polish Journal of Environmental Studies 2021-09-14

Abstract : Material characteristics analysis of Sarulla natural zeolite (SNZ) with base activation has been carried out. The used was NaOH at various concentrations; 0.2 M, 0.5 and 2 M. Base activated catalysts were characterized by X-ray Fluorescence (XRF), diffractometer (XRD), Fourier-transform Infrared (FTIR) Spectroscopy, Scanning Electron Microscopy (SEM) gas adsorption using BET method. procedures applied have caused differences in desorption rates as well the crystallinity values...

10.22373/ekw.v6i1.6913 article EN Elkawnie 2020-06-30

The purpose of this research is to find the optimization process biodiesel production from rubber seed oil using natural zeolite modification. method are 1) Modification Natural Zeolite Using NH 4 NO 3 , 2) Characterization catalyst FTIR and XRD, 3) Esterification transesterification at 30 o C, 40 50 C 60 for 2 hours in each step H-Zeolite, 4) Analyzation liquid product Gas Chromatography (GC). result shown that best conversion into methyl ester fatty acid about 76.43% with Methyl linoleate...

10.24114/jpkim.v10i2.10919 article EN Jurnal Pendidikan Kimia 2018-08-30

Technological developments change the researchers and educators thinking towards online learning. Various innovations were carried out to support effective learning which suitable with student competencies. As there is urgency for carrying practicum activities achieved Course Learning Achievement (Capaian Pembelajaran Mata Kuliah (CPMK)) basic chemistry subject, need make some innovation, by making video. It could stimulate students critical because it was presented visual representations....

10.24036/ekj.v4.i1.a325 article EN EduKimia 2022-02-15

Oil palm midrib are very abundant waste, especially in the North Sumatra, Indonesia.Lignocellulose contained oil can be used as a source of alternative energy raw materials.The purpose this research is to produce bio-oil that reduce use fossil fuels.Natural zeolite (ZAS) catalyst was activated by mineral acid and calcination with nitrogen gas.Impregnation Ni Fe into ZAS followed oxidation process obtained Ni-Fe/ZAS catalyst.The conversion powder cellulose carried out delignification NaOH...

10.21608/ejchem.2022.96526.4517 article EN Egyptian Journal of Chemistry 2022-03-03

This study aims to obtain an alternative fuel from plastic pyrolytic oil (PPO) that has similar properties gasoline and diesel fuel. The process carried out is distillation, which heating the PPO at a certain temperature so light heavy molecules will evaporate turn into distillate (DPO). effect of on quality DPO was observed based color obtained DPO. Temperatures ranging 120 350 °C were examined in this study. cleaner produced about °C, indicated molecule hydrocarbon gasoline, while little...

10.4028/p-9tuu9g article EN Key engineering materials 2024-03-27

The lignocellulosic component contained in palm frond waste has potential as an alternative fuel by converting it into bio-oil through a pyrolysis process. However, poor quality when compared to conventional fuels. Therefore, the Hydrodeoxygenation (HDO) process been widely developed promising way improve physicochemical properties of bio-oil. In this study, bimetallic CuO-ZnO catalyst loaded on mordenite zeolite was used for HDO from fronds. Optimization efforts were made several parameters...

10.24114/jpkim.v16i1.52556 article EN cc-by Jurnal Pendidikan Kimia 2024-04-18
Coming Soon ...