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All Journal Jurnal Teknoin Eksergi: Chemical Engineering Journal ASEAN Journal of Chemical Engineering Sainteknol : Jurnal Sains dan Teknologi
Nur Indah Fajar Mukti
Department Of Chemical Engineering, Islamic University Of Indonesia, 55584 Yogyakarta, Indonesia
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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MODIFIKASI ZEOLIT ALAM SEBAGAI ADSORBEN AMMONIUM HIDROKSIDA (NH4OH) Nur Indah Fajar Mukti
Teknoin Vol. 22 No. 10 (2016)
Publisher : Faculty of Industrial Technology Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknoin.vol22.iss10.art4

Abstract

Natural zeolite is a mineral that are widely available in Indonesia. Among many other benefits, the natural zeolite can be used as an adsorbent to reduce water pollutant caused by ammonia compounds and combination of derivatives. This research aimed to study the effect of natural zeolite dealumination on the adsorption properties of ammonium hydroxide (NH4OH). Dealumination effect was studied by varying the concentration of HNO3 (0.5 N, 5 N and 10 N). The adsorption process of NH4OH was observed by studying the adsorption time with amount of NH4OH adsorbed on the surface of the zeolite. In addition, also studied the effect of heating (calcination) after dealumination to the NH4OH uptake. In this study, NH4OH adsorbed on zeolite surface was observed by Fourier Transform Infrared (FTIR). Results were showed that the amount of NH4OH adsorbed on H- zeolite has a maximum (80.8%) at 5 N HNO3. From the calcination process, it was noted that H-zeolite undergo calcination process has higher NH4OH adsorption capacity than that of the H-zeolite without a calcination process. FTIR analysis was showed that NH4OH adsorbed on the surface of H- zeolite on Brønsted acid peak.
PENGARUH TINGKAT KEASAMAN PADA KARAKTERISTIK ZEOLIT ALAM SEBAGAI ADSORBEN AMMONIUM HIDROKSIDA (NH4OH) Nur Indah Fajar Mukti
Eksergi Vol 14, No 1 (2017): Eksergi Volume 14 No 1 2017
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v14i1.2006

Abstract

Natural zeolite is a mineral that are widely available in Indonesia. Among many other benefits, the natural zeolite can be used as an adsorbent to reduce water pollutant caused by ammonia compounds and combination of derivatives. This research aimed to study the effect of different acids on zeolite characterizatics as adsorbent of ammonium hydroxide (NH4OH). The effect of acids addition  on natural zeolite was studied by varying the concentration of H2SO4(0,5 N; 3 N and 5 N) and concentration of H3PO4 (0,5 N; 3 N and 5 N). In this study, zeolite surface was observed by Fourier Transform Infrared (FTIR). Results were showed that the amount of NH4OH adsorbed on H- zeolite has a maximum (23,6 mg/gram zeolit) at 5 N H2SO4. From the NH4OH uptake experiment, it was noted that zeolite obtained from H-Zeolite-H2SO4 has higher NH4OH adsorption capacity than that of zeolite obtained from H-Zeolite-H3PO4. The adsorption capacity of H-Zeolite-H2SO4, H-Zeolite-H3PO4, are 23,6 mg/g and 12,9 mg/g, respectively. FTIR analysis was showed that NH4OH adsorbed on the surface of H- zeolite on Brønsted acid peak.
Removing Ethylene by Adsorption using Cobalt Oxide-Loaded Nanoporous Carbon Imam Prasetyo; Nur Indah Fajar Mukti; Moh Fahrurrozi; Teguh Ariyanto
ASEAN Journal of Chemical Engineering Vol 18, No 1 (2018)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1011.751 KB) | DOI: 10.22146/ajche.49542

Abstract

Ethylene is naturally generated by climacteric fruits and can promote the ripening process faster. For effective long-distance transport and subsequent storage, removing ethylene from the storage environment has been of interest to suppress its undesirable effect. In this study, ethylene removal by an adsorptive method using cobalt-loaded nanoporous carbon is studied. Cobalt oxide-loaded carbon was prepared by incipient wetness method followed by calcination process at 200 °C under inert flow. Ethylene adsorption test was performed at 20, 30, and 40 °C using a static volumetric test. The results showed that cobalt oxide/carbon system has significant ethylene adsorption capacity up to 3.5 times higher compared to blank carbon. A higher temperature adsorption is more favorable for this chemisorption process. Ethylene uptake increases from 100 to 150 mL g-1adsorbent STP by increasing cobalt oxide loading on carbon from 10 to 30 wt.% Co. The highest uptake capacity of 6 mmol ethylene per gram adsorbent was obtained using 30 wt.% cobalt oxide. Therefore, ethylene adsorption by cobalt-loaded nanoporous carbon may represent a potential method in ethylene removal and it could serve as a basis for development of ethylene scavenging material.
Synthesis of Glycerol Monooleate with MgO-Impregnated Natural Zeolite Catalyst Nur Indah Fajar Mukti; Avicenna Mustika Putri; Wahidah Nur; Ibnu Arobi; Muhammad Ridho Arifa
Sainteknol : Jurnal Sains dan Teknologi Vol. 22 No. 1 (2024): June 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sainteknol.v22i1.5441

Abstract

Glycerol Monooleate (GMO) is synthesized via esterification, which involves the reaction between glycerol and oleic acid to yield monoglyceride esters. The esterification reaction is intrinsically slow, requiring the use of a catalyst to decrease the activation energy. The catalyst used in this study is a naturally occurring zeolite catalyst that has been altered through acid treatment and impregnation with Mg(NO3)2, and then subjected to calcination to convert it into MgO. Typically, this research consists of two steps: an initial phase where a natural zeolite catalyst is altered, followed by a subsequent phase where glycerol monooleate production. This study investigates the effects of different variables on the reaction. The variables include temperature (140–180oC), catalyst loading (3-10 %weight), glycerol to oleic acid ratio (2:1, 3:1, 4:1), reaction time (0–180 minutes), and stirring speed (125-525 rpm). The research results demonstrate that the highest conversion rate was achieved with a temperature of 180oC, a catalyst concentration of 10%, and a reactant ratio of 3:1 (glycerol to oleic acid). The ideal response time was found to be 120 minutes. The reaction kinetics can be estimated by employing a pseudo reaction equation that follows a first-order rate law. The rate constant, represented by k', can be approximated using the Arrhenius equation. The reaction has an activation energy of -18.64 kJ.mol-1, and the value of A is 1.41 cm3.g-1.minute-1.
Co-Authors Avicenna Mustika Putri Ibnu Arobi Imam Prasetyo Moh Fahrurrozi Muhammad Ridho Arifa Teguh Ariyanto Wahidah Nur