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Extractive Distillation of Ethanol/Water with 1-Butyl-3-Methylimidazolium Bromide Ionic Liquid as a Separating Agent: Process Simulation Hartanto, Dhoni; Handayani, Prima Astuti; Astuti, Widi; Kusumaningtyas, Ratna Dewi; Purwana, Yulian Candra; Maftukhaturrizqiyah, Maftukhaturrizqiyah; Wijayanti, Reni Titis; Wulansari, Durroti Zuhriah; Wulansarie, Ria; Pradnya, Irene Nindita; Hadikawuryan, Danang Subarkah; Wibowo, Agung Ari; Sholihin, Riza Mazidu; Chafidz, Achmad; Khoiroh, Ianatul
ASEAN Journal of Chemical Engineering Vol 23, No 3 (2023)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.72250

Ethanol purification has become of great interest recently because ethanol can be used as renewable energy, solvent in many industries, and for medicinal purposes. The separation of ethanol from water is challenging because the azeotropic point has appeared in this binary mixture. Extractive distillation technology is one of the most interesting methods to separate ethanol from water due to the competitiveness of its energy consumption and capital investment costs. Ionic liquids such as 1-butyl-3-methylimidazolium bromide [BMIM] [Br], categorized as a green solvent, produce a significant salting-out effect in the ethanol-water system. This makes ionic liquid a promising solvent in ethanol-water separation. This study simulated the extractive distillation of an ethanol-water system with 1-butyl-3-methylimidazolium bromide as a solvent. The simulation and sensitivity analysis were performed on the Aspen Plus Process Simulator to obtain the optimum configuration. The NRTL thermodynamic model was used in this study. The effects of the number of stages (NS), binary feed stage (BFS), entrainer feed stage (EFS), and reflux ratio (RR) on the ethanol concentration with minimum energy requirements were studied. The most optimal configurations to produce a high ethanol concentration with less energy are NS 28, BFS 22, EFS 4, and RR 1.5.

Prediksi Kesetimbangan Uap-Cair Sistem Biner 3-Pentanol + Asam Propionat Sebagai Basis Pada Proses Desain Pemurnian Biofuel Bekti, Andi Setyo; Paramitha, Pradnya; Altway, Saidah; Wibowo, Agung Ari
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

Show Abstract | Download Original | Original Source | Check in Google Scholar

The depletion of fossil fuels has led to a turn toward renewable and cleaner diesel fuel. In recent years, research has focused on the development of green energy to replace fossil fuels. 3-Pentanol is the preferred alternative fuel because it has better fuel properties compared to other biofuels. 3-Pentanol, as a propionic acid derivative chemical platform, can be produced from renewable biomass through the lactic acid pathway. Therefore, to obtain 3-Pentanol with high purity, a purification process such as distillation is required. Vapor-liquid equilibrium data and the thermodynamic model parameters are needed as basis for designing a distillation column and optimizing the separation process. The aim of this study is to predict the vapor-liquid equilibria (VLE) of the binary systems of 3-Pentanol + propionic acid at 100 kPa, 200 kPa, and 300 kPa using the UNIFAC model in combination with the Hayden-O’Connell model. The prediction results showed no azeotropes found for the studied systems. This study can also open a scope for the thermodynamic studies of biofuel separation process.

Performance Analysis of Virtual Tour Navigation Guides for Landmark Recognition: Analisis Performa Panduan Navigasi Pada Pengenalan Ruang Berbasis Virtual Tour Akbar, Muhamad Aminul; Afirianto, Tri; Arwani, Issa; Pinandito, Aryo; Wibowo, Agung Ari
JOINCS (Journal of Informatics, Network, and Computer Science) Vol. 7 No. 1 (2024): April
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/joincs.v7i1.1627

Abstract. Virtual Tour Navigation should make it easy for beginners to find all the places in the virtual environment and allow them to remember or gain landmark knowledge about the virtual environment being explored. Navigation guides help novices to find and reach locations quickly, but the use of guides can reduce the acquisition of spatial knowledge because users are less active in encoding the environment into spatial working memory. Generally, users can move between locations using navigation arrows on the virtual tour. All navigation arrows are displayed to be able to move throughout the room according to the user's wishes, which we call non-linear or free navigation. This causes beginners to get lost and fail to find all locations. This research proposes a user guide in Virtual Tour by limiting user exploration. User exploration can only be done linearly where certain navigation arrows appear gradually every time a room is found. To prevent users from getting lost, navigation arrows are coloured differently when heading to locations they have already visited. This research was applied to virtual tours based on 360 panoramic photos. The test results showed that virtual tours that used linear navigation guides obtained faster completion times than virtual tours with non-linear navigation. In testing landmark knowledge, there was no significant difference between linear and non-linear virtual tours. This shows that the guidelines proposed by the researchers do not cause a decrease in spatial learning outcomes and still provide advantage in navigation time.

Prediksi Kesetimbangan Uap-Cair Sistem Biner 3-Pentanol + Asam Propionat Sebagai Basis Pada Proses Desain Pemurnian Biofuel Bekti, Andi Setyo; Paramitha, Pradnya; Altway, Saidah; Wibowo, Agung Ari
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

Show Abstract | Download Original | Original Source | Check in Google Scholar

The depletion of fossil fuels has led to a turn toward renewable and cleaner diesel fuel. In recent years, research has focused on the development of green energy to replace fossil fuels. 3-Pentanol is the preferred alternative fuel because it has better fuel properties compared to other biofuels. 3-Pentanol, as a propionic acid derivative chemical platform, can be produced from renewable biomass through the lactic acid pathway. Therefore, to obtain 3-Pentanol with high purity, a purification process such as distillation is required. Vapor-liquid equilibrium data and the thermodynamic model parameters are needed as basis for designing a distillation column and optimizing the separation process. The aim of this study is to predict the vapor-liquid equilibria (VLE) of the binary systems of 3-Pentanol + propionic acid at 100 kPa, 200 kPa, and 300 kPa using the UNIFAC model in combination with the Hayden-O’Connell model. The prediction results showed no azeotropes found for the studied systems. This study can also open a scope for the thermodynamic studies of biofuel separation process.

Panduan Pelayanan Bedah Digestif Selama Masa Pandemi COVID-19: Perhimpunan Dokter Spesialis Bedah Digestif Indonesia (IKABDI) Nugroho, Adianto; Arifin, Fransicus; Widianto, Perwira; Wibowo, Agung Ari; Handaya, A. Yuda; Kristian, Iwan; Rivai, M Iqbal; Mulyawan, Made; Niam, Mohammad; Budiono, Parish; Putro, Mamiek Dwi; Warsinggih, Warsinggih
Majalah Kedokteran Indonesia Vol 70 No 6 (2020): Journal of The Indonesian Medical Association - Majalah Kedokteran Indonesia, Vo
Publisher : PENGURUS BESAR IKATAN DOKTER INDONESIA (PB IDI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47830/jinma-vol.70.6-2020-239

Digestive surgery service including surgical management of gastrointestinal disease and digestive cancers are experiencing the impact of COVID-19 pandemic. Therefore it is necessary to formulate recommendation for digestives surgery service, as guidelines to engage in case-by-case assessment of particular patients with digestive diseases. We are aware that the knowledge and science of COVID-19 are still evolving, with new progression every day. This recommendation reflect actual condition and are subject for future adjustment in the future.

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