Prediction of Mass Transfer Columns with Dumped and Arranged Packings

Billet, Reinhard; Schultes, Michael

doi:10.1205/026387699526520

Cited by 359 publications

(174 citation statements)

References 6 publications

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“…The flooding limit developed by Billet and Schultes 27 was used in this model; with a recommended liquid design velocity between 70 -80% of this limit. 27 In the case of the pilot-scale column the liquid velocity is high, with a consequent possibility of flooding.…”

Section: Methodsmentioning

confidence: 99%

Modeling the Water Scrubbing Process and Energy Requirements for CO₂ Capture to Upgrade Biogas to Biomethane

Nock

Walker

Kapoor

et al. 2014

Ind. Eng. Chem. Res.

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Water scrubbing is the most widely used technology for removing CO 2 from biogas and landfill gas. This work developed a rate-based mass transfer model of the CO 2 -water system for upgrading biogas in a packed bed absorption column. The simulated results showed good agreement with both a pilot-scale plant operating at 10 bar, and a large-scale biogas upgrading plant operating at atmospheric pressure. The calculated energy requirement for the absorption column to upgrade biogas to 98% CH 4 (0.23 kW h N m 3 , or 4.2 % of the input biogas) is a significantly closer approximation to the measured value (0.26 kW h N m 3 , or 4.8 % of the input biogas) than has previously been reported in the literature. The model allows for improved design of CO 2 capture and biogas upgrading operations, and can also be a useful tool for more detailed cost-benefit analysis of the technology.

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Section: Methodsmentioning

confidence: 99%

Modeling the Water Scrubbing Process and Energy Requirements for CO₂ Capture to Upgrade Biogas to Biomethane

Nock

Walker

Kapoor

et al. 2014

Ind. Eng. Chem. Res.

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“…Thus, the published data for interfacial area and mass transfer coefficients comprise the maldistibution in an undefined Table 6. Selected values of the factors C V and C L in Equations (39) and (40) according to [21] Packing Figure 23 presents some experimental results of a packed column operated with hot water and air (like a cooling tower) [6]. In this system the mass transfer of water from liquid into gas phase causes a decrease of liquid temperature which can be easily measured.…”

Section: Mass Transfer In Packed Columnsmentioning

confidence: 99%

Distillation, 2. Equipment

Stichlmair

2010

Ullmann's Encyclopedia of Industrial Chemistry

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The article contains sections titled: 1. Introduction 2. Tray Columns 2.1. Design Principles 2.2. Operation Region of Tray Columns 2.3. Two‐Phase Flow on Trays 2.4. Mass Transfer in the Two‐Phase Layer 3. Packed Columns 3.1. Design Principles 3.2. Operation Region of Packed Columns 3.3. Two‐Phase Flow in Packed Columns 3.4. Mass Transfer in Packed Columns

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“…7, the driving force for oxygen transfer (C * -C) can be estimated using the mass transfer coefficient, k L and the effective interfacial area of the packing, a, from correlations given in the literature [15] and the oxygen consumed by both the BOD and the COD removal measured in the experiments under various air-liquid contacting times. The results obtained are presented in Fig.…”

Section: Effect Of Aeration Intervals On the Bod 5 Removalmentioning

confidence: 99%

Intermittent Aeration in Biological Treatment of Wastewater

Doan¹,

Lohi²

2009

American J. of Engineering and Applied Sciences

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Problem statement: E-coating process is widely used to provide a protective coating layer on metal parts in the automotive and metal finishing industry. The wastewater from the coating process contains organic compounds that are used in the cleaning, pretreatment and coating steps. Organic pollutants can be removed biologically. In the aerobic biological treatment, water aeration accounts for a significant portion of the total operating cost of the treatment process. Intermittent aeration is thus of benefit since it would reduce the energy consumption in the wastewater treatment. In the present study, wastewater from an electro-coating process was treated biologically using a packed column as an aerator where the wastewater was aerated by a countercurrent air flow. The objective was to obtain an optimum aeration cycle. Approach: Intermittent aeration time was varied at different preset cycles. An operational optimum of the aeration time (or air-water contacting time in the column) was determined from the BOD 5 removal after a certain treatment period. For continuous aeration of the wastewater, the air-liquid contacting time in the column was 52 min for 24 h of treatment. A unit energy consumption for pumping liquid and air, which was defined as the energy consumption per percent BOD 5 removed, was used as a criterion to determine the optimum contacting time. Results: Optimum air-liquid contacting times were found to be about 38, 26 and 22 min for the treatment times of 24, 48 and 72 h, consecutively. This indicates that 27-58% saving on the unit energy consumption can be achieved using intermittent aeration of the wastewater. On the basis of the overall BOD 5 removal, 17% and 23% savings in energy were observed with the intermittent aeration as compared to the continuous aeration of the wastewater for 48 and 72 h. Conclusion: The results obtained indicate that an appropriate intermittent aeration cycle can bring about a substantial energy saving while an adequate treatment of wastewater is maintained.

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Prediction of Mass Transfer Columns with Dumped and Arranged Packings

Cited by 359 publications

References 6 publications

Modeling the Water Scrubbing Process and Energy Requirements for CO₂ Capture to Upgrade Biogas to Biomethane

Modeling the Water Scrubbing Process and Energy Requirements for CO₂ Capture to Upgrade Biogas to Biomethane

Distillation, 2. Equipment

Intermittent Aeration in Biological Treatment of Wastewater

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Prediction of Mass Transfer Columns with Dumped and Arranged Packings

Cited by 359 publications

References 6 publications

Modeling the Water Scrubbing Process and Energy Requirements for CO2 Capture to Upgrade Biogas to Biomethane

Modeling the Water Scrubbing Process and Energy Requirements for CO2 Capture to Upgrade Biogas to Biomethane

Distillation, 2. Equipment

Intermittent Aeration in Biological Treatment of Wastewater

Contact Info

Product

Resources

About

Modeling the Water Scrubbing Process and Energy Requirements for CO₂ Capture to Upgrade Biogas to Biomethane

Modeling the Water Scrubbing Process and Energy Requirements for CO₂ Capture to Upgrade Biogas to Biomethane