Behavior of CO-water mass transfer coefficient in membrane sparger-integrated bubble column for synthesis gas fermentation. (September 2020)

• Record Type: Journal Article
• Authors: Jang, Nulee; Lee, Mungyu; Yasin, Muhammad; Chang, In Seop
• Is Part Of: Bioresource technology. Volume 311(2020)
• Publication Date: 2020-09
• Subjects: Bubble column reactor -- Gas-liquid mass transfer -- Gas sparger -- Ceramic membrane -- Carbon monoxide; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2020.123594
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Mass transfer coefficients ( k L a ) of O2 were compared in a BCR using membrane spargers. The highest O2 -water k L a of 163.6/h was obtained using ceramic membrane module (CMM). First report on CO-water mass transfer in a CMM-integrated BCR. The models to predict k L a of CO and O2 were proposed for a CMM-integrated BCR. Abstract: The gas–liquid mass transfer coefficient ( k L a ) of O2 was investigated in a bubble column reactor (BCR) using a sintered gas filter (SF), ceramic membrane module (CMM), and hollow fiber membrane module (HFM), which have different ranges of gas supply areas. k L a was enhanced by increasing flow rate in all of the spargers. Different responses when changing the gas supply area were obtained depending on the sparger type. Average values of k L a that were 52 and 258% higher were obtained using a CMM-integrated BCR compared to SFs and HFMs. CO-water k L a was investigated using CMMs for application to gas fermentation. The CO-water k L a ranged from 28.3 to 113.7/h under the experimental conditions. Based on the experimental data from CO and O2, a model to predict k L a was constructed for CMM-integrated BCRs. A dimensionless number indicating a gas supply area of the sparger was newly defined and included in the developed model.