Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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A Study of Upgrading Real Biogas via CO2 Precipitation Route Under Indian Scenario

  • Gehlaut, Avneesh Kumar (Department of Chemical Engineering, Motilal Nehru National Institute of Technology) ;
  • Gaur, Ankur (Department of Chemical Engineering, Motilal Nehru National Institute of Technology) ;
  • Hasan, Shabih Ul (Department of Chemical Engineering, Motilal Nehru National Institute of Technology) ;
  • Park, Jin-Won (Department of Chemical and Biomolecular Engineering, Yonsei University)
  • Received : 2017.09.25
  • Accepted : 2018.03.08
  • Published : 2018.06.01
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Abstract

Our study focuses on upgrading real biogas obtained under Indian scenario using carbon capture and utilization (CCU) technology to remove carbon dioxide ($CO_2$) and utilize it by forming metal carbonate. Amines such as monoethanolamine (MEA), diethanolamine (DEA), and sodium hydroxide (NaOH) were used to rapidly convert gaseous $CO_2$ to aqueous $CO_2$, and $BaCl_2$ was used as an additive to react with the aqueous $CO_2$ and rapidly precipitating the aqueous $CO_2$. All experiments were conducted at $25^{\circ}C$ and 1 atm. We analyzed the characteristics of the $BaCO_3$ precipitates using X-ray diffractometry (XRD), scanning electron microscopy - Energy dispersive spectroscopy (SEM-EDS) and Fourier-transform infrared spectroscopy (FT-IR) analyses. The precipitates exhibited witherite morphology confirmed by the XRD results, and FT-IR confirmed that the metal salt formed was $BaCO_3$, and EDS showed that there were no traces of impurities present in it. The quantity of the $BaCO_3$ was larger when formed with DEA. Also, a comparison was done with a previous study of ours conducted in Korean conditions. Finally, we observed that the carbonate obtained using real biogas showed similar properties to carbonates available in the market. An economic analysis was done to show the cost effectiveness of the method employed by us.

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References

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