Life Cycle Assessment of Potassium Lysinate for Biogas Upgrading

Authors

  • Kwong Cheng Lang Department of Chemical and Environmental Engineering, Malaysia - Japan International Institute of Technology, Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, 54100 Kuala Lumpur, Malaysia
  • Lian See Tan Department of Chemical and Environmental Engineering, Malaysia - Japan International Institute of Technology, Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, 54100 Kuala Lumpur, Malaysia https://orcid.org/0000-0001-9039-7926
  • Jully Tan School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, Selangor 47500, Malaysia https://orcid.org/0000-0002-2767-4414
  • Azmi Mohd Shariff Chemical Engineering Department, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia https://orcid.org/0000-0001-8524-1994
  • Hairul Nazirah Abdul Halim Faculty of Chemical Engineering Technology, Universiti Malaysia Perlis, Kompleks Pusat Pengajian Jejawi 3, 02600 Arau, Perlis, Malaysia https://orcid.org/0000-0002-2731-0055

DOI:

https://doi.org/10.37934/progee.22.1.2939

Keywords:

Life cycle assessment, Global warming potential, Acidification potential, Eutrophication potential, Potassium lysinate

Abstract

Monoethanolamine solvent (MEA) is a common solvent used in biogas upgrading plant for carbon dioxide (CO2) and hydrogen sulfide (H2S) removal. However, it has some downsides such as corrosive, high toxicity, and promotes products degradation. Alternatively, amino acid-based solvents such as potassium lysinate (LysK) have been found to have good absorption performance. It is also claimed to be more environmentally friendly as it is less toxic and has a good biodegradability. However, its actual environmental impact for the application of biogas upgrading has not been quantified in a detailed manner. Therefore, in this study, the environmental impact of LysK solvent is quantified from gate to grave in terms of Global Warming Potential (GWP), Acidification Potential (AP) and Eutrophication Potential (EP) using life cycle assessment (LCA) approach. The process was simulated using process simulator, SuperPro Designer version 10 to obtain the input-output data. LysK solvent has a low heat of absorption, which could result in lower CO2 emissions during the biogas upgrading process. However, due to its energy-intensive nature, the incineration process significantly contributed to GWP, AP, and EP. There were also emissions of NOx and SO2 from the flue gas of the incinerator. The findings of this research provide some insight on the environmental impact of utilising LysK for biogas upgrading.

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Published

2022-12-02

How to Cite

[1]
K. C. Lang, L. S. Tan, J. Tan, A. M. Shariff, and H. N. Abdul Halim, “Life Cycle Assessment of Potassium Lysinate for Biogas Upgrading”, Prog. Energy Environ., vol. 22, pp. 29–39, Dec. 2022.
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Volume 22 (December 2022)

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