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All Journal Reaktor Journal of Engineering and Technological Sciences JURNAL SELULOSA ASEAN Journal of Chemical Engineering Jurnal Teknologi Bahan dan Barang Teknik Jurnal Teknik Kimia Indonesia Bulletin of Chemical Reaction Engineering & Catalysis Journal of Engineering and Technological Sciences
S. Subagjo
Chemical Engineering Department, Institut Teknologi Bandung
Aerospace Engineering Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology

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Kinetic Study on the SO2 Adsorption using CuO/γ-Al2O3 Adsorbent David Bahrin; Subagjo Subagjo; Herri Susanto
Bulletin of Chemical Reaction Engineering & Catalysis 2016: BCREC Volume 11 Issue 1 Year 2016 (April 2016)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.11.1.425.93-100

Abstract

Adsorbent CuO/g-Al2O3 for adsorption of SO2 were prepared by impregnating Cu(NO3)2.3H2O solution. Five types of adsorbent were obtained 5Cu (intended Cu concentration of 5%, actual of 4.92%), 8Cu (7.68%), 15Cu(14.13%), 22Cu (20.80%) and 27Cu (25.80%). For activity test, model gas containing SO2 with a concentration of about 0.755 mol/m3 were passed through the bed of 1 gram adsorbent at a flow rate in the range of 1.4-1.8 mL/s. Adsorption of SO2 were carried out at a constant temperature of 300, 350, 400 or 450 °C. Increasing sulfur loadings (gram of sulfur per gram of adsorbent) were observed with increasing adsorption temperatures, but not with increasing Cu content in the adsorbent. Among those types, adsorbent of 8Cu was considered as the best with respect to the sulfur loading (3 g of sulfur per 100 g of adsorbent). Adsorbent 5Cu had actually a better sulfur loading, but it was suspected being contributed also by adsorption of SO2 on Al2O3. The shrinking core model was used in the kinetic study of adsorption using 8Cu and with additional assumption of a spherical particle. Compared to film diffusion and pore diffusion controlling step models, the reaction rate limitation was the best to fit the experimental data. The reaction rate constant for this model at temperatures of 300, 350, 400 and 450 °C were 0.022, 0.038, 0.042, and 0.059 kg.m.mol-1.min-1, respectively. The activation energy was 21.25 kJ.mol-1 and the frequency factor was 2.02 min-1. 
Investigation of the Effect of Silica and Phosphorus Content on the Performance of Active Matrix as Component of Cracking Catalyst Melia Laniwati Gunawan; Carolus Borromeus Rasrendra; Candra Lutfi Widikrama; Rizky Gilang Kurniawan; Lita Marina Nisa; Farhansyah Yusuf Putra Hudaya; I G. B. N. Makertihartha; Subagjo Subagjo
Journal of Engineering and Technological Sciences Vol. 56 No. 2 (2024)
Publisher : Directorate for Research and Innovation, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2024.56.2.3

Abstract

Fluid catalytic cracking (FCC) is a technique that converts heavy-fraction feed into fuel. The FCC catalyst components consist of a composite material made of zeolite, filler, binder, and an active matrix. The active matrix is used as a pre-cracker for the heavy-fraction feed. This study examined the impact of the Si/Al ratio and the addition of phosphorus on the physical properties and activity of the active matrix. The synthesis technique refers to US patent 6723297 B2. The utilized variants consisted of SiO2 ranging from 50 to 80 weight percent and a phosphorous addition ranging from 1 to 2 weight percent. The physical characteristics of the active matrix were assessed using nitrogen physisorption and NH3-Temperature programmed adsorption/desorption techniques. A chemical activity test was conducted using the micro activity test (MAT) method, with vacuum gas oil (VGO) as the feedstock. This test was done in accordance with the ASTM D 5154 – 03 standard. The results indicated that the silica composition in the active matrix is directly related to the average pore diameter but inversely related to the specific surface area. Additionally, the inclusion of phosphorus had a similar impact. The silica-alumina-phosphorous variant containing 75%-wt of SiO2 exhibited the most superior active matrix activity, achieving the maximum acquisition of light cycle oil (LCO) at 33%-wt.
Co-Authors Achmad Syamsul Arief Adnanta Rio Agus Subekti Ahlul Hafizan Resha Anita K. Wardani Anita K. Wardani, Anita K. Candra Lutfi Widikrama Carolus Borromeus Rasrendra Danu Ariono David Bahrin Deviana Pramitasari Endang Sri Rahayu Endar Puspawiningtiyas Farhansyah Yusuf Putra Hudaya Fitri Rumiani Galang Putra Persada Grandprix T.M. Kadja Hendra Suherman Herri Susanto I G. B. N. Makertihartha I Gede Wenten I.G.B Ngurah Makertihartha IGBN Makertihartha IGBN Makertihartha IGBN Makertihartha Kevin R. Lismana Kevin R. Lismana Khasin Fuadi Khasin Fuadi Lita Marina Nisa M. Effendy M. Effendy M. Effendy M. Effendy M. Effendy Maria Ulfah Meiti Pratiwi Melia L. Gunawan Melia Laniwati Melia Laniwati Gunawan Melia Laniwati Gunawan Melia Laniwati Gunawan Melia Laniwati Gunawan Melia Laniwati Gunawan Mohammad Effendy Mohammad Effendy P.T.P. Aryanti P.T.P. Aryanti, P.T.P. Praharso Paharso Praharso Praharso Pratama Istiadi Rino R. Mukti Rizky Gilang Kurniawan Shelli R. Joscarita Shelli R. Joscarita, Shelli R. Syamsudin Syamsudin Syamsudin Syamsudin T. Walmiki Samadhi Tatang Hernas Soerawidjaja Temy Nurfahmiawati Tirto Prakoso Tjokorde Walmiki Samadhi Tjokorde Walmiki Samadhi Tjokorde Walmiki Samadhi Tobias Richards Ulfah, Maria Vita Wonoputri Vita Wonoputri Widdy Andya Fanny Winny Wulandari, Winny Yazid Bindar Yazid Bindar Yazid Bindar Yazid Bindar Yogi W. Budhi Yogi W. Budhi Yogi Wibisono Budhi Zaky Al Fatony