Experimental Study of the Effect of Catalyst Properties on Hydrodynamics and Mass Transfer in a Slurry Reactor
This work was devoted to study the influence of well-known catalyst carriers (activated utilized in catalytic reactions carbon and silica) on the hydrodynamic parameters and mass transfer rate in a slurry reactor. The influence of silica and activated carbon particles concentration up to 20% v/v on...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
University of Diyala
2020-03-01
|
| Series: | Diyala Journal of Engineering Sciences |
| Subjects: | |
| Online Access: | https://djes.info/index.php/djes/article/view/20 |
| _version_ | 1817996099395256320 |
|---|---|
| author | Hiba M. Abdullah Mohammad F. Abid Orooba N. Abdullah |
| author_facet | Hiba M. Abdullah Mohammad F. Abid Orooba N. Abdullah |
| author_sort | Hiba M. Abdullah |
| collection | DOAJ |
| description |
This work was devoted to study the influence of well-known catalyst carriers (activated utilized in catalytic reactions carbon and silica) on the hydrodynamic parameters and mass transfer rate in a slurry reactor. The influence of silica and activated carbon particles concentration up to 20% v/v on regime transition, average gas holdup, mass transfer coefficient, and CO2 removal was studied in a semi- batch slurry bubble column reactor (SBC) with a porous gas sparger. The effects of hydrophobicity and surfactant were also investigated. It was concluded the gas holdup is reduced and the point of transition from laminar to turbulent regime is shifted to less gas velocity when the hydrophobic and hydrophilic particles concentration was larger than 3% (v/v). The Particle hydrophobicity, gas velocity, and electrolyte concentration have positive impacts on gas holdup while slurry concentration gave a different trend. Experimental results show that the optical fiber probe is valid to use in a slurry bubble column and can also generate useful data such as bubble rise velocity and bubble distribution. The optical fiber probe was proved to be good technique for estimation of volumetric mass transfer coefficient within an error of ±18%. Mass transfer experiments with gaseous CO2 showed a behavior of removal in the same trend of increasing gas holdup with gas velocity. A noticeable removal of gaseous pollutants was observed for non-wettable particles at solid loading of 3%v/v.
Mathematical correlations were formulated for CO2 removal as function of studied operating variables with correlation factors of 0.95-0.98. The present study depicts the effect of catalyst carrier on the hydrodynamic characteristics and mass transfer in a slurry reactor
|
| first_indexed | 2024-04-14T02:17:07Z |
| format | Article |
| id | doaj.art-eeb6b5f4a0e54fefb727161f91ba1c40 |
| institution | Directory Open Access Journal |
| issn | 1999-8716 2616-6909 |
| language | English |
| last_indexed | 2024-04-14T02:17:07Z |
| publishDate | 2020-03-01 |
| publisher | University of Diyala |
| record_format | Article |
| series | Diyala Journal of Engineering Sciences |
| spelling | doaj.art-eeb6b5f4a0e54fefb727161f91ba1c402022-12-22T02:18:11ZengUniversity of DiyalaDiyala Journal of Engineering Sciences1999-87162616-69092020-03-0113110.24237/djes.2020.13102Experimental Study of the Effect of Catalyst Properties on Hydrodynamics and Mass Transfer in a Slurry ReactorHiba M. Abdullah0Mohammad F. Abid1Orooba N. Abdullah2Department of Chemical Engineering, University of TechnologyDepartment of Chemical Engineering, University of Technology Department of Chemical Engineering, University of Technology This work was devoted to study the influence of well-known catalyst carriers (activated utilized in catalytic reactions carbon and silica) on the hydrodynamic parameters and mass transfer rate in a slurry reactor. The influence of silica and activated carbon particles concentration up to 20% v/v on regime transition, average gas holdup, mass transfer coefficient, and CO2 removal was studied in a semi- batch slurry bubble column reactor (SBC) with a porous gas sparger. The effects of hydrophobicity and surfactant were also investigated. It was concluded the gas holdup is reduced and the point of transition from laminar to turbulent regime is shifted to less gas velocity when the hydrophobic and hydrophilic particles concentration was larger than 3% (v/v). The Particle hydrophobicity, gas velocity, and electrolyte concentration have positive impacts on gas holdup while slurry concentration gave a different trend. Experimental results show that the optical fiber probe is valid to use in a slurry bubble column and can also generate useful data such as bubble rise velocity and bubble distribution. The optical fiber probe was proved to be good technique for estimation of volumetric mass transfer coefficient within an error of ±18%. Mass transfer experiments with gaseous CO2 showed a behavior of removal in the same trend of increasing gas holdup with gas velocity. A noticeable removal of gaseous pollutants was observed for non-wettable particles at solid loading of 3%v/v. Mathematical correlations were formulated for CO2 removal as function of studied operating variables with correlation factors of 0.95-0.98. The present study depicts the effect of catalyst carrier on the hydrodynamic characteristics and mass transfer in a slurry reactor https://djes.info/index.php/djes/article/view/20Slurry reactorcatalyst supportHydrodynamicsparticle hydrophobicityOptical fibersmass transfer coefficient |
| spellingShingle | Hiba M. Abdullah Mohammad F. Abid Orooba N. Abdullah Experimental Study of the Effect of Catalyst Properties on Hydrodynamics and Mass Transfer in a Slurry Reactor Diyala Journal of Engineering Sciences Slurry reactor catalyst support Hydrodynamics particle hydrophobicity Optical fibers mass transfer coefficient |
| title | Experimental Study of the Effect of Catalyst Properties on Hydrodynamics and Mass Transfer in a Slurry Reactor |
| title_full | Experimental Study of the Effect of Catalyst Properties on Hydrodynamics and Mass Transfer in a Slurry Reactor |
| title_fullStr | Experimental Study of the Effect of Catalyst Properties on Hydrodynamics and Mass Transfer in a Slurry Reactor |
| title_full_unstemmed | Experimental Study of the Effect of Catalyst Properties on Hydrodynamics and Mass Transfer in a Slurry Reactor |
| title_short | Experimental Study of the Effect of Catalyst Properties on Hydrodynamics and Mass Transfer in a Slurry Reactor |
| title_sort | experimental study of the effect of catalyst properties on hydrodynamics and mass transfer in a slurry reactor |
| topic | Slurry reactor catalyst support Hydrodynamics particle hydrophobicity Optical fibers mass transfer coefficient |
| url | https://djes.info/index.php/djes/article/view/20 |
| work_keys_str_mv | AT hibamabdullah experimentalstudyoftheeffectofcatalystpropertiesonhydrodynamicsandmasstransferinaslurryreactor AT mohammadfabid experimentalstudyoftheeffectofcatalystpropertiesonhydrodynamicsandmasstransferinaslurryreactor AT oroobanabdullah experimentalstudyoftheeffectofcatalystpropertiesonhydrodynamicsandmasstransferinaslurryreactor |