H2S biofiltration using expanded schist as packing material: influence of packed bed configurations at constant EBRT

2014 ◽  
Vol 90 (1) ◽  
pp. 50-56 ◽  
Author(s):  
Amaury Courtois ◽  
Yves Andrès ◽  
Éric Dumont
Keyword(s):  
Packed Bed ◽  
Packing Material

scholarly journals A packed bed Reactor Combined with Membrane Unit for the Elimination of Toluene Vapours using a Novel Packing Material

2020 ◽  
Vol 9 (1) ◽  
pp. 1679-1683
Keyword(s):  
Membrane Fouling ◽  
Membrane Separation ◽  
Packed Bed ◽  
Polymer Processing ◽  
Packing Material ◽  
Packed Bed Reactor ◽  
Membrane Unit ◽  
Membrane Array ◽  
The One ◽  
Oily Liquid

Toluene is a colorless and aromatic oily liquid primarily used in the petrochemical and polymer processing industries and has been used in this study as the target compound. Continuous experiments were performed in a biofilter on a laboratory scale, followed by a membrane reactor to monitor toluene as one single contaminant. This bioreactor device included a reactor with a packed bed and a membrane array. Pearl millet stacks and berl saddles have been used as packing material for the development of the attached microorganism. Toluene was efficiently treated, with toluene effluent concentrations held at less than 0.4 g m-3 and a Total Removal Efficiency (TRE) of more than 96 % achieved when fluctuating loads were faced by the packed bed reactor. The combined packed bed reactor system had a maximum RE of 93.8 g m -3 h -1 , which was higher than the one obtained with the packed bed reactor alone. In this work the influences on gas membrane separation were also explored in the combined bioreactor and membrane fouling.

H2S biofiltration using expanded schist as packing material: performance evaluation and packed-bed tortuosity assessment

2012 ◽  
Vol 87 (6) ◽  
pp. 725-731 ◽  
Author(s):  
E. Dumont ◽  
L. M. Ayala Guzman ◽  
M. S. Rodríguez Susa ◽  
Y. Andrès
Keyword(s):  
Performance Evaluation ◽  
Packed Bed ◽  
Packing Material

Non-Ideal Flow in Liquid-Solid Fixed Beds of Irregular-Shaped Particles: A Critical Review

2010 ◽  
Vol 8 (1) ◽  
Author(s):  
Vassilis J Inglezakis
Keyword(s):  
Packed Bed ◽  
Industrial Applications ◽  
Packing Material ◽  
Dispersion Coefficients ◽  
Packed Bed Reactors ◽  
Ideal Flow ◽  
Current Review ◽  
Time Dispersion ◽  
Wide Range ◽  
Fixed Beds

Available data and correlations for non ideal flow in liquid-solid fixed beds are summarized and reviewed with focus on irregular-shaped particles as packing material. The reason is that in many industrial applications (adsorption, ion exchange, catalysis, etc.) the particles used are of irregular shape while the vast majority of available data on dispersion and non ideal flow is on non-porous spherical or other ordered-shaped particles (saddles, rings, cylinders, tablets, etc.). In the same time, dispersion plays an important part, for example, in reactant and product transport in packed bed reactors, in adsorption, leaching, etc. In the present review all available correlations and data for liquid-solid fixed beds packed with irregular-shaped particles are collected for the prediction of the dispersion coefficients over a wide range of practical values particle Reynolds number. For the current review, 198 experimental points used and 6 Ped – Rep correlations are presented, all derived for irregular-shaped particles.

scholarly journals MASS TRANSFER IN LAMINAR REGION BETWEEN LIQUID AND PACKING MATERIAL SURFACE IN THE PACKED BED

1972 ◽  
Vol 5 (2) ◽  
pp. 132-136 ◽  
Author(s):  
TAKESHI KATAOKA ◽  
HIROYUKI YOSHIDA ◽  
KORETSUNE UEYAMA
Keyword(s):  
Mass Transfer ◽  
Packed Bed ◽  
Packing Material ◽  
Material Surface

Managing total reduced sulfur emissions at a Canadian kraft pulp mill

TAPPI Journal ◽  
2016 ◽  
Vol 15 (4) ◽  
pp. 265-272 ◽  
Author(s):  
ROHAN BANDEKAR ◽  
JIM FREDERICK ◽  
JAROSLAV STAVIK
Keyword(s):  
Direct Contact ◽  
Black Liquor ◽  
Pulp Mill ◽  
Packed Bed ◽  
Average Value ◽  
Emission Limit ◽  
Total Reduced Sulfur ◽  
Reduced Sulfur ◽  
Air Ingress ◽  
Solids Content

This study addresses the challenges a dissolving-grade pulp mill in Canada faced in 2014 in meeting its total reduced sulfur (TRS) gas emission limit. These emissions from the recovery boiler exit are controlled by passing the boiler exit gas through a TRS scrubber system. The mill employs a cyclonic direct contact evaporator to concentrate black liquor to firing solids content. The off-gases from the direct contact evaporator flow to the effluent gas control system that consists of a venturi scrubber, a packed bed scrubber, and a heat recovery unit. Emissions of TRS greater than the regulated limit of 15 ppm were observed for a 4-month period in 2014. The level of emissions measured during this period was significantly higher than about 12 ppm, the expected average value based on historic experience. The problem persisted from mid-June 2014 until the annual mill shutdown in October 2014. The main TRS components detected and the performance of the Teller scrubber in capturing them are examined. Other potential causes for these emissions are identified, including mechanical problems such as broken packing in the TRS packed bed scrubber, broken baffle plates in the scrubber, and cyclone evaporator leaks causing air ingress. Repairs were carried out during the mill shutdown, which eliminated the TRS emissions problem.

Modified Effectiveness Model for Crossflow Packed-Bed Humidifiers

2019 ◽  
Vol 5 (1) ◽  
pp. 27-33
Author(s):  
Mostafa Sharqawy ◽  
◽  
Robert Zinni
Keyword(s):  
Packed Bed ◽  
Effectiveness Model

Desulfurization of UCG Gas using a Packed-bed Dielectric Barrier Discharge

2015 ◽  
Vol 135 (7) ◽  
pp. 435-436 ◽  
Author(s):  
Kazuhiro Takahashi ◽  
Kohki Satoh ◽  
Hidenori Itoh ◽  
ichi Itakura
Keyword(s):  
Dielectric Barrier Discharge ◽  
Barrier Discharge ◽  
Packed Bed ◽  
Dielectric Barrier
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