Mass transfer in a multiple stage cross-current packed column Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/mk61rk59j

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • A cascade crosscurrent column, packed with Pall rings, was employed for ammonia absorption from ammonia-rich air phase by contacting with water. Absorption efficiency was presented as the percentage of NH₃ removed as well as the volume of a transfer unit. A review of the literature concerning the theoretical and experimental investigation of mass transfer in the crossflow columns was presented. Information extracted from the tracer studies along with the mass transfer results confirmed the existence of two distinct regions; the transition between the two regions could be visually observed in the column. A decrease in the absorption efficiency was observed due to the expansion of the packing section. Upon reduction in the number of baffles, the absorption efficiency decreased further. It was also concluded that the mixing activities in the packing and on the baffles after the transition compensated for the loss of efficiency due to the dead space, created by the criss-crossing of the liquid. Based on the experimental results and visual observations in the crosscurrent column, the bypass model for the region prior to the transition and the zero bypass model for the region after the transition were proposed. The models were successful in predicting the experimental data. Correlations were developed that adequately predicted the percentage bypass in the column, with original packing, expanded packing and expanded packing with six baffles, for the operating conditions investigated in this work. Favorable pressure drop results, obtained by other investigators, combined with the results of this work suggested the cascade crosscurrent packed column to be an attractive alternative to the conventional towers for the ammonia-air-water system.
Resource Type
Date Available
Date Copyright
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi (Monochrome) using ScandAll PRO 1.8.1 on a Fi-6770A in PDF format. CVista PdfCompressor 5.0 was used for pdf compression and textual OCR.
Replaces
Additional Information
  • description.provenance : Submitted by Kirsten Clark (kcscannerosu@gmail.com) on 2013-08-22T23:06:10Z No. of bitstreams: 1 BayanGhawamedin1981.pdf: 1035145 bytes, checksum: b78bed15f3199f4edfec3350363c6220 (MD5)
  • description.provenance : Made available in DSpace on 2013-08-27T17:29:34Z (GMT). No. of bitstreams: 1 BayanGhawamedin1981.pdf: 1035145 bytes, checksum: b78bed15f3199f4edfec3350363c6220 (MD5) Previous issue date: 1980-07-11
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-08-23T18:30:35Z (GMT) No. of bitstreams: 1 BayanGhawamedin1981.pdf: 1035145 bytes, checksum: b78bed15f3199f4edfec3350363c6220 (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-08-27T17:29:34Z (GMT) No. of bitstreams: 1 BayanGhawamedin1981.pdf: 1035145 bytes, checksum: b78bed15f3199f4edfec3350363c6220 (MD5)

Relationships

Parents:

This work has no parents.

Last modified

Downloadable Content

Download PDF

Items