Application of biochar for acid gas removal: experimental and statistical analysis using CO2
- 75 Downloads
Acid gases such as carbon dioxide and hydrogen sulfide are common contaminants in oil and gas operations, landfill gases, and exhaust stacks from power plants. While there are processes currently used to treat these effluents (e.g., amine absorption and adsorption using zeolite), many of these processes require high energy, space, and hazardous chemicals. Removal using biochar derived from the fast pyrolysis of forestry residues represents a more sustainable option. In this study, adsorption using CO2 as a surrogate for acid gases was investigated using various biochars produced from fast pyrolysis of sawmill residues. Response surface methodology was used to determine operating conditions for maximum adsorption and assess interaction of the adsorption parameters, i.e., temperature, inlet feed flow rate, and CO2 concentration, on biochar adsorption capacity. The Freundlich isotherm best represented the equilibrium adsorption, and the kinetic model was pseudo first-order. Thermodynamic analysis indicated the adsorption process was spontaneous and exothermic. The biochar had better adsorption capacity relative to commercial zeolite. Our results suggested that biochar could be used as a sustainable and cost-effective option for contaminant removal from acid gases produced in landfill gas treatment, fossil fuel extraction, and/or combustion.
KeywordsAcid gases Carbon dioxide Adsorption Biochar Optimization RSM
We would like to express our gratitude to Dr. Andrew Carrier, Postdoctoral Fellow in Cape Breton University for productive comments and discussion.
- Anderson MJ, Whitcomb PJ (2013) DOE Simplified: practical tools for effective experimentation, vol 53. https://doi.org/10.1017/CBO9781107415324.004
- Bruce PC (2016) Introductory statistics and analytics: a resampling perspective. John Wiley, Inc., HobokenGoogle Scholar
- Chatterjee R, Sajjadi B, Mattern DL, Chen WY, Zubatiuk T, Leszczynska D, Leszczynski J, Egiebor NO, Hammer N (2018) Ultrasound cavitation intensified amine functionalization: a feasible strategy for enhancing CO2capture capacity of biochar. Fuel 225:287–298. https://doi.org/10.1016/j.fuel.2018.03.145 CrossRefGoogle Scholar
- Chen CP, Chuang MT, Hsiao YH, Yang YK, Tsai CH (2009a) Simulation and experimental study in determining injection molding process parameters for thin-shell plastic parts via design of experiments analysis. Expert Syst Appl 36:10752–10759. https://doi.org/10.1016/j.eswa.2009.02.017 CrossRefGoogle Scholar
- Gallucci F, Van Sint Annaland M (2015) Process intensification for sustainable energy conversion. https://doi.org/10.1002/9781118449394
- Raganati F, Alfe M, Gargiulo V, et al (2018) Isotherms and thermodynamics of CO2 adsorption on a novel carbon-magnetite composite sorbent. Chem Eng Res Des 134:540–552. https://doi.org/10.1016/j.cherd.2018.04.037
- Rouquerol J, Rouquerol F, Llewellyn P, Maurin G, Sing KSW (2013) Adsorption by powders and porous solids: principles, methodology and applications: second edition. https://doi.org/10.1016/C2010-0-66232-8.
- Schaefer M (1991) Measurement of Adsorption-Isotherms by Means of Gas ChromatographyGoogle Scholar
- Singh J, Bhunia H, Basu S (2018) CO2 adsorption on oxygen enriched porous carbon monoliths: Kinetics, isotherm and thermodynamic studies. J Ind Eng Chem 60:321–332. https://doi.org/10.1016/j.jiec.2017.11.018
- Tamez Uddin M, Rukanuzzaman M, Maksudur Rahman Khan M, Akhtarul Islam M (2009) Adsorption of methylene blue from aqueous solution by jackfruit (Artocarpus heteropyllus) leaf powder: a fixed-bed column study. J Environ Manag 90:3443–3450. https://doi.org/10.1016/j.jenvman.2009.05.030 CrossRefGoogle Scholar
- Tiwari D, Goel C, Bhunia H, Bajpai PK (2017) Dynamic CO2 capture by carbon adsorbents: Kinetics, isotherm and thermodynamic studies. Sep Purif Technol 181:107–122. https://doi.org/10.1016/j.seppur.2017.03.014
- Valenciano R, Aylón E, Izquierdo MT (2015) A critical short review of equilibrium and kinetic adsorption models for VOCs breakthrough curves modelling. Adsorpt Sci Technol 33:851–869. doi: https://doi.org/10.1260/0263-6184.108.40.2061
- Yaumi AL, Bakar MZA, Hameed BH (2018) Melamine-nitrogenated mesoporous activated carbon derived from rice husk for carbon dioxide adsorption in fixed-bed. Energy 155:46–55. https://doi.org/10.1016/j.energy.2018.04.183