Article Per Year (5 Year)
p-Index From 2019 - 2024
1.503
P-Index
This Author published in this journals
All Journal Majalah Forum Teknik UGM Jurnal Rekayasa Proses Reaktor Seminar Nasional Teknik Kimia Kejuangan Journal of Engineering and Technological Sciences Jurnal Riset Industri Jurnal Pengabdian Kepada Masyarakat (Indonesian Journal of Community Engagement) Jurnal Rekayasa Proses Jurnal Teknologi ASEAN Journal of Chemical Engineering Jurnal Teknologi Bahan dan Barang Teknik Indonesian Journal Of Energy And Mineral
Aswati Mindaryani
Department Of Chemical Engineering, Faculty Of Engineering, Universitas Gadjah Mada, Yogyakarta, Indonesia
Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

Published : 17 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search
Journal : ASEAN Journal of Chemical Engineering

 1 
Surface Modification of Multi-Walled Carbon Nanotubes with Polysaccharides Francisca Larasati; Yuni Kusumastuti; Aswati Mindaryani; Rochmadi Rochmadi; Murni Handayani
ASEAN Journal of Chemical Engineering Vol 22, No 1 (2022)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.69866

Abstract

Multi-walled carbon nanotubes (MWCNTs) are known as efficient drug carriers. To improve their interaction with other materials, surface modification of MWCNTs is necessary. In this work, MWCNTs were functionalized with acid and polysaccharides (chitosan and gelatin). The functionalization process was done via modification with acid solutions of nitric acid, sulfuric acid, and a mixture of nitric acid-sulfuric acid first, followed by functionalization with chitosan and gelatin. To achieve the optimum condition of MWCNTs functionalization, the reaction time, temperature, and acid ratio were varied. Furthermore, the effect of chitosan and gelatin addition into MWCNTs was studied at various mass ratios. The synthesized materials were characterized by Fourier transform infrared spectrophotometer, Boehm titration, and dispersion test. The Boehm titration results showed that the acid functional groups had been attached successfully to MWCNTs surface. The amount of acid functional groups increased along with reaction time. The highest amount of acidic group obtained from the data was 2.33 mmol/g. It was achieved when MWCNTs reacted with nitric acid for 24 hours. Temperature and acid ratio variations on the MWCNTs functionalization did not provide significant results. From the FTIR data, sharp peaks at 3480 cm-1 and 1040 cm-1 indicates a -CONH bond, which shows that chitosan and gelatin have been successfully grafted onto MWCNTs surface via an amide linkage. Moreover, the dispersion test showed that the functionalized materials were stable for 48 hours.
Kinetic Parameters Determination of Benzene Vapor Adsorption on Activated Carbon Using Differential Permeation Technique Aswati Mindaryani; Boma W. Tyoso; Wahyudi B. Sediawan; Supranto Supranto
ASEAN Journal of Chemical Engineering Vol 5, No 1 (2005)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (221.949 KB) | DOI: 10.22146/ajche.50163

Abstract

Equilibrium and kinetic data are very important for a reliable design of a large-scale adsorption system. The objective of the research was to determine the particle scale kinetic parameters of strongly adsorbed volatile organic compounds (VOCS)in activated carbon (AC) by using the differential permeation technique. The experimental rig consisted basically of upstream and downstream reservoirs separated by a slab-shaped AC that is 2 mm thick. After cleaning the slab overnight at 400 K and under vacuum condition, the experiment was started by opening the valve to allow vapor to diffuse through the AC. The upstream and downstream pressures were continuously recorded until equilibrium was reached. Another experiment was run by increasing incrementally the upstream pressure. The same experiment was carried out using nonadsorbed gas (argon) to estimate both Knudsen permeability and viscous permeability. The Knudsen, viscous, and surface diffusivities were determined by matching the total permeability against the experimental data. From the data obtained, it was found that both porosity and surface diffusivity change with loading. The surface diffusivity of benzene vapor in AC pores does not follow the Darken model, but it follows the hydrodynamic model of Gilliland, especially when the porosity is relatively constant at high loading. Keywords: Adsorption, benzene, differential permeation, kinetic, and volatile organic compounds (VOCs).
Co-Authors Adriyanti, Dwi Tyaningsih Agus Prasetya Anies Mutiari Aqiela Mahannada Benny Arif Pambudiarto Boma W. Tyoso Bostang Radjagukguk Deendarlianto Divita Hayyu Kinanthi Edia Rahayuningsih Edia Rahayuningsih Francisca Larasati Handrian Handrian Himawan Tri Bayu Murti Petrus Imam Prasetyo Mukti Mukti Muntari, Anies Murni Handayani Muslikhin Hidayat Ningrum, Sari Sekar Nur Indah Fajar Mukti Pambudiarto, Benny Arif Rochmadi Rochmadi Supranto Supranto Surasno . Syafrima Wahyu Tri Winarni Soenarto Putri Veni Tri Agustin Wahyudi B. Sediawan Wahyudi Budi Sediawan Wiratni . Wiratni Budhijanto Wiratni Wiratni Yuni Kusumastuti