Chiang Mai Journal of Science

Print ISSN: 0125-2526 | eISSN : 2465-3845

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H2S Removal from Biogas using Steel Wool (Fe2O3) Adsorption Combined with Water Absorption: Experimental and Modelling via RSM

Jiraporn Paoaiang, Prukraya Pongyeela, Nirana Chairerk and Juntima Chungsiriporn
* Author for corresponding; e-mail address: juntima.c@psu.ac.th
Volume: Vol.51 No.2 (March 2024)
Research Article
DOI: https://doi.org/10.12982/CMJS.2024.027
Received: 31 July 2023, Revised: 3 January 2024, Accepted: 17 Febuary 2024, Published: -

Citation: Paoaiang J., Pongyeela P., Chairerk N. and Chungsiriporn J., H2S removal from biogas using steel wool (Fe2O3) adsorption combined with water absorption: Experimental and modelling via RSM, Chiang Mai Journal of Science, 2024; 51(2): e2024027. DOI 10.12982/CMJS.2024.027.

Abstract

   Hydrogen sulfide (H2S) is a hazardous gas commonly found in biogas systems; it causes problems in biogas utilization because H2S is highly corrosive to engines, gas storage tanks, and generators. The purpose of this research was to study the biogas upgrading by removing H2S using SCM440 type steel wool (Fe2O3) adsorption combined with water absorption. The biogas upgrading column was operated at a biogas flow rate of 0.5–3 l/min, with 10–50 g of treated Fe2O3 adsorbent packed in the middle of the column, and 60–300 ml of water contained at the bottom of the column. The optimal conditions obtained by the RSM for maximum H2S removal were 1 l/min gas flow rate, 40 g Fe2O3 and 240 ml water, can be H2S removal of 50.79 g/m3 biogas. Statistical, ANOVA analysis showed that Fe2O3 was the most significant factor followed by water and gas flow rate. RSM models showed acceptable prediction of experimental data with maximum R2 value of 0.9804. The Fe2O3 regeneration conditions were examined at air flow rates of 1–4 l/min, regeneration times of 1–4 h, and 1–4 repeated uses for H2S removal. The optimum condition was found at a 2 l/min air flow rate for 2 h, resulting in a maximum H2S removal of 97.39%. Hence, the Fe2O3 adsorbent combined with water absorption technique has high potential for environmentally friendly and low-cost removal of H2S from biogas at an industrial level.

Keywords: biogas upgrading, adsorption, central composite design, optimization, renewable energy

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Mohd H.I. Ibrahim*[a,b], Norhamidi Muhamad [b], Abu B. Sulong [b], Khairur R. Jamaludin [c], Nor H.

Vol.38 No.2 (APRIL 2011)
Research Article View: 1,000 Download: 250
A Comparative Analysis of Conjugate Gradient Algorithms & PSO Based Neural Network Approaches for Reusability Evaluation of Procedure Based Software Systems
page: 123 - 135

Parvinder S. Sandhu*[a], Shalini Chhabra [b]

Vol.38 (SPECIAL ISSUE 2011)
Research Article View: 1,017 Download: 217
Experiments and Statistical Analysis of Supercritical Carbon Dioxide Extraction
page: 109 - 115

Wipawee Yothipitak, Praiya Thana, Motonobu Goto and Artiwan Shotipruk

Vol.35 No.1 (JANUARY 2008)
Research Article View: 1,002 Download: 317
Adsorption Equilibrium of Zinc Ions from Aqueous Solution by Using Modified Clinoptilolite
page: 56 - 62

Achanai Buasri, Phetcharat Yongbut, Nattawut Chaiyut and Kittiya Phattarasirichot

Vol.35 No.1 (JANUARY 2008)
Research Article View: 1,464 Download: 337
Use of Natural Clinoptilolite for the Removal of Lead (II) from Wastewater in Batch Experiment
page: 447 - 456

Achanai Buasri, Nattawut Chaiyut, Kittiya Phattarasirichot, Phetcharat Yongbut and Lalita Nammueng

Vol.35 No.3 (SEPTEMBER 2008)
Research Article View: 1,453 Download: 985
Smart Chemical Sensors Based on Ceramic Heterocontacts
page: 239 - 244

David Cann and Seymen Aygün

Vol.32 No.3 (SEPTEMBER 2005)
Research Article View: 1,396 Download: 271
Thermodynamics Study of Natural Indigo Adsorption on Silk Yarn
page: 363 - 367

Paisan Kongkachuichay, Aroonsiri Shitangkoon, and Sakowrath Hirunkitmonkon

Vol.37 No.2 (MAY 2010)
Short Communication View: 1,494 Download: 359
Effects of Inorganic and Organic Phases on Specific Surface Area of Ball Clay
page: 141 - 154

Apinon Nuntiya*[a], Frank L. Riley [b] and Brian Rand [b]

Vol.29 No.3 (DECEMBER 2002)
Research Article View: 1,498 Download: 263
Sensitivity Enhancement of Differential Pulse Polarographic Technique by Simplex Optimization Method
page: 71 - 81

Buabarn Poonperm, Waret Veerasai* and Prapin Wilairat

Vol.27 No.2 (DECEMBER 2000)
Opinion View: 967 Download: 250
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