Optimization for biohydrogen purification process by chemical absorption techniques
Issued Date
2023-12-01
Resource Type
eISSN
24682039
Scopus ID
2-s2.0-85174185646
Journal Title
Sustainable Environment Research
Volume
33
Issue
1
Rights Holder(s)
SCOPUS
Bibliographic Citation
Sustainable Environment Research Vol.33 No.1 (2023)
Suggested Citation
Chusut W., Kanchanasuta S., Inthorn D. Optimization for biohydrogen purification process by chemical absorption techniques. Sustainable Environment Research Vol.33 No.1 (2023). doi:10.1186/s42834-023-00196-5 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/90710
Title
Optimization for biohydrogen purification process by chemical absorption techniques
Author(s)
Author's Affiliation
Other Contributor(s)
Abstract
Palm oil decanter cake and crude glycerol, which are characterized by their highly biodegradable organic content and nutrient-rich composition, are attractive ingredients for biohydrogen production. In this experiment, we investigated (1) how to produce hydrogen more effectively by co-fermenting palm oil decanter cake and crude glycerol and (2) how to improve the quality of the hydrogen gas produced via chemical absorption technology. This study was divided into two parts. In the first part, the co-fermentation was conducted with a fixed decanter cake concentration of 1% total solids (TS) w/v and variable crude glycerol concentrations (0.25–2.0% w/v). The results showed that maximum biohydrogen production was achieved with 2.0% w/v crude glycerol, which had a hydrogen yield of 131 L kg−1 TSadded and a hydrogen productivity of 1310 mL L−1 d−1. In the second part of the experiment, biohydrogen purification was conducted using the chemical absorption technique by varying four different alkaline solutions: mono ethanolamine (MEA), ammonia (NH3), sodium hydroxide (NaOH), and potassium hydroxide (KOH). The highest hydrogen purity of 98.9% v/v was reached with the MEA solution at a 5 M concentration and a 280 mL min−1 feed mixed gas flow rate for an absorption time of 5 min. However, to achieve sustainable waste management in palm oil mill plants, the feasibility of integrating the biohydrogen production process with palm oil mill effluent from the biogas plants and applying a hydrogen gas quality improvement system need to be investigated further.