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All Journal Jurnal Rekayasa Proses International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis Seminar Nasional Teknik Kimia Kejuangan Journal of Engineering and Technological Sciences Jurnal Sains & Teknologi Lingkungan Indonesian Journal of Chemistry Jurnal Chemurgy Jurnal Rekayasa Proses Indonesian Journal of Life Cycle Assessment and Sustainability ASEAN Journal of Chemical Engineering PELS (Procedia of Engineering and Life Science) Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Rekayasa Proses (Journal of Environmental Sustainability Management)
Muhammad Mufti Azis
Chemical Engineering Department, Faculty Of Engineering, Gadjah Mada University, Yogyakarta
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 Social Sciences Other

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Journal : ASEAN Journal of Chemical Engineering

 1 
Solketal Production by Glycerol Acetalization Using Amberlyst-15 Catalyst Hary Sulistyo; Edwin Nur Huda; Tri Sarifah Utami; Wahyudi Budi Sediawan; Suprihastuti Sri Rahayu; Muhammad Mufti Azis
ASEAN Journal of Chemical Engineering Vol 20, No 1 (2020)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.52455

Abstract

Glycerol, as a by-product of biodiesel production, has recently increased due to the rapid growth of the biodiesel industry. Glycerol utilization is needed to increase the added value of glycerol. Glycerol can be converted to solketal, which can be used as a green fuel additive to enhance an octane or cetane number. Conversion of glycerol to solketal was conducted via acetalization reaction with acetone using amberlyst-15 as the catalyst. The objective of present study was to investigate the effect of some operation conditions on glycerol conversion. Furthermore, it also aimed to develop a kinetic model of solketal synthesis with amberlyst-15 resins. The experiment was conducted in a batch reactor, equipped with cooling water, thermometer, stirrer, and a water bath. The variables that have been investigated in the present work were reaction temperature, reactants molar ratio, catalyst loading, and stirrer speed for 3 hours of reaction time. Temperatures, reactants molar ratio, and stirrer speed appeared to have a significant impact on glycerol conversion, where the higher values led to higher conversion. On the other hand, in the presence of catalyst, the increase of catalyst loading has a less significant impact on glycerol conversion. The results showed that the highest glycerol conversion was 68.75%, which was obtained at 333 K, the reactant’s molar ratio was  4, the amount of catalyst was 1 wt%, and stirrer speed of 500 rpm. Based on the pseudo-homogeneous kinetic model, the resulting kinetic model suitable for this glycerol capitalization. The value of parameters k and Ea were 1.6135 108 min-1 and 62.226 kJ mol-1,respectively. The simulation model generally fits the experimental data reasonably well in the temperature range of 313-333 K.
The Influence of Carbon Tax on the Feasibility of Industrial Project: A Case Study of Heat Exchanger Replacement at PT Kaltim Methanol Industri, Indonesia Wingo Wira Dewanatan; Muhammad Kurniawan Adiputra; Imam Karfendi Putro; Soni Hartanto; Jonas Kristanto; Muhammad Mufti Azis
ASEAN Journal of Chemical Engineering Vol 20, No 2 (2020)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.59515

Abstract

Petrochemical industries have faced growing pressure to decrease their carbon emission from direct and indirect sources. This work aims to demonstrate a carbon tax’s introduction to a feasibility study on the heat exchanger (HE) replacement project at PT Kaltim Methanol Industri, Indonesia. The project was aimed to avoid methanol release as much as 48.88 MT/year. The release of methanol can also be associated with CO2 emission with an emission factor of 0.6 ton CO2e/ton methanol. Here, we investigated the influence of inclusion and exclusion of carbon tax to monetize the CO2 release. From the project investment point of view, carbon tax inclusion is expected to increase the cost-saving. Introduction of the carbon tax as high as 10 USD/ton CO2e with 5% annual increase gives IRR value of 7.06% with Payout Time (PoT) of ca. 11 years. The IRR value without carbon tax scenario is 6.68 % with the same range of PoT. Hence, the inclusion of carbon tax may increase the feasibility of the project. This work has demonstrated the positive role of the carbon tax to increase the feasibility of a project which inlines with the national initiatives to curb the CO2 emission from chemical industries. It is also worth noting that introduction of carbon tax should be accompanied by a reorganization of government incentives, including several financial policies to create a conducive atmosphere for investors in Indonesia.
Kinetic Study of Subcritical Water Extraction of Carbohydrate from Microalgae Nannochloropsis sp. Nur Baiti Listyaningrum; Muhammad Mufti Azis; Sarto Sarto; Anis Nurdhiani Rosdi; Mohd Razif Harun
ASEAN Journal of Chemical Engineering Vol 21, No 1 (2021)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.60015

Abstract

Microalgae contain a significant amount of carbohydrates that can be converted further to produce valuable compounds. To extract carbohydrates from microalgae, sub-critical water extraction (SWE) is a viable and novel method. Compared to other existing chemical and biological extraction methods, SWE is more economical, effective, and efficient in terms of process conditions. This process uses high temperature and pressure of water at just below supercritical conditions to keep water at a liquid state. This study aims to investigate the factors that affect the extraction yield of carbohydrates from microalgae Nannochloropsis sp. using the SWE process. The extraction was carried out at a temperature of 160 – 320 oC, a duration of 5 – 25 min, and microalgal biomass loading of 5 - 25% w/v. The kinetics study was conducted in an extraction time of 5 – 25 min at 200 oC and 5% (w/v) biomass loading. A simplified kinetic model based on a consecutive reaction was used to describe carbohydrate production and decomposition via SWE. It was found that the maximum yield of total carbohydrate was 18.04 g/100 g which was obtained at 200 oC, 10 min, and 5% (w/v) microalgal biomass loading. The carbohydrate concentration was decreased as the temperature, extraction time and microalgal biomass loading increased. This result indicated that the SWE is a promising extraction method for carbohydrate recovery from microalgae, and the factors investigated here had a significant effect on the extraction process. The proposed kinetic model was also able to capture the experimental data well within the range of operating conditions studied in this work. 
Co-Authors Alfian Hayu Sudibya Andriani, Anisa Novi Anis Nurdhiani Rosdi Arief Budiman Ariff Trisetia Anggara Arista Dwi Rahmawati Caroko, Novi Damayanti, Sri Ismiyati Derek Creaser Desi Amalia Fenyka Dwiatmoko, Adid Adep Edwin Nur Huda Fergie Febrina Galuh Almas Darmawati Hartanto, Danang Tri Hary Sulistyo Hary Sulistyo Hary Sulistyo Hary Sulistyo Haryanto, Imam Hilya Mudrika Arini Himawan Novianto Ignesti Anindia Ikhsana, Mifta Aulia Imam Karfendi Putro Indah Hartati Indah Hartati Intan Supraba, Intan Irma Atika Sari Jonas Kristanto Kristanto, Jonas Kurniati, Sayekti Margaretha Praba Aulia Moh Fahrurrozi Moh Fahrurrozi Mohd Razif Harun Muhammad Abdul Ghony Muhammad Kurniawan Adiputra Muhammad Noor Ridho Aji Muslikhin Hidayat Nur Baiti Listyaningrum Ramadhani, Laily Isna Ringgani, Retno Rio Arya Pratama Rizki Zulapriansyah Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Sabariyanto Sabariyanto Safitri, Mutia Sarto Sarto Sarto Sarto Sarto Sarto Siti Syamsiah Soni Hartanto Sudibyo, Hanifrahmawan Suprihastuti Sri Rahayu Suryo Purwono Sutijan Sutijan Sutijan Sutijan Titi Tiara Anasstasia Titi tiara Anasstasia Titi Tiara Anasstasia Titi Tiara Anasstasia Tri Sarifah Utami Wahyudi Budi Sediawan Wahyudi Budi Sediawan Wahyudi Budi Sediawan Wingo Wira Dewanatan Wiratni Budhijanto Wulandari, Lisa Ayu