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All Journal Seminar Nasional Teknik Kimia Kejuangan Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Metal Indonesia ASEAN Journal of Chemical Engineering Jurnal Ilmiah Lingkungan Kebumian Jurnal Teknik Kimia Indonesia
I Made Bendiyasa
Chemical Engineering Department, Faculty Of Engineering, Gadjah Mada University, Jln. Grafika, No.2, Yogyakarta, 55281
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering

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Journal : ASEAN Journal of Chemical Engineering

 1 
A Thermodynamic Study of Methane Hydrates Formation In Glass Beads Tintin Mutiara; Budhijanto Budhijanto; I Made Bendiyasa; Imam Prasetyo
ASEAN Journal of Chemical Engineering Vol 16, No 1 (2016)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (916.982 KB) | DOI: 10.22146/ajche.49670

Abstract

Natural gas hydrates are non-stoichiometry compounds, in which the molecules of gas are trapped in crystalline cells consisting of water molecules retained by energy of hydrogen bonds. The experiments of Methane hydrate formation are performed at constant temperature in a reactor filled with various sizes of glass beads and water. Methane gas was fed into the reactor at various initial pressures. Equilibrium condition was reached when the system pressure did not change. The experimental results showed that the size of the glass beads gave very small effect on the equilibrium pressure of methane hydrate formation, so the effect could be neglected. In this study, the equation of Langmuir constant was Ci,CH4=(1/RT)exp[A+(B/T)] with the values of A and B for small cages were 6.8465 and 18.0342. The values of A and B for large cages were 7.7598 and 18.0361
CO2 Selective Water Gas Shift Membrane Reactor : Modeling and Simulation Sang Kompiang Wirawan; Derek Creaser; I Made Bendiyasa; Wahyudi Budi Sediawan
ASEAN Journal of Chemical Engineering Vol 12, No 1 (2012)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (854.129 KB) | DOI: 10.22146/ajche.49756

Abstract

The concept of a CO2 selective water gas shift (WGS) membrane reactor has been modeled and simulated by a one-dimensional reactor and transport process in the membrane. The model was used to investigate the effect of temperature, total pressure, membrane thickness and area on the reactor performance. A Silicalite-1 membrane was considered to be integrated with the WGS reactor. The mass transport through the membrane was described by surface diffusion. Air was used as sweep gas on the permeate side of the membrane. The catalytic WGS kinetics were for a commercial Cu/ZnO catalyst for the lower-temperature WGS reaction. The WGS membrane reactor was sized to produce H2 sufficient for the production of 10 kW electrical power from a fuel cell. The modeling and simulation results showed that the WGS membrane reactor with a silicalite-1 membrane was capable of decreasing the CO concentration to about 675 ppm which is 70% less than that achievable at equilibrium conversion, but it would come at the cost of unacceptable H2 loss. Based on a minimum target of H2 loss, the optimum outlet CO concentration achieved by the silicalite-1 membrane reactor was about 1310 ppm, under a range of limited conditions. The modeling study showed that both the WGS reaction rate and the CO2/H2 selective permeation played an important role on the overall reactor performance.
Co-Authors Agus Prasetya Akbar Yulandra Aprodhita Kusumaningtyas, Aprodhita Arini Nur Utami Budhijanto Budhijanto D Setiawan Dagus Resmana Djuanda Derek Creaser Dita Budi Wibawa Ferian Anggara Fika Rofiek Mufakir H Heriyanto Himawan Tri Bayu Murti Petrus Himmah Sekar Eka Ayu Agustina Hotden Manurung Hudi Nurwendi Iga Trisnawati Imam Prasetyo Indra Perdana Indra Perdana Marizka Aviana Permatasari Panut Mulyono R. Octaviany Rahman Sudiyo S Sarto Sang Kompiang Wirawan Sarto Surianti Surianti Suryo Birowo Taufikul Hadi Tintin Mutiara Tri Mustika Wahyu Rachmi pusparini Wahyudi Budi Sediawan Widi Astuti Widi Astuti Widya Rosita Yustina Rusnawati, Yustina