Regeneration of Hydrophobic Zeolites with Steam

Küntzel, J.; Ham, R.; Melin, T.

doi:10.1002/(sici)1521-4125(199912)22:12<991::aid-ceat991>3.0.co;2-l

Cited by 12 publications

(9 citation statements)

References 3 publications

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“…3,4,5,6,7,8 Existing methods for the removal or collection of oils from an oil-water mixture utilise absorbent materials 9 such as zeolites, 10,11 organoclays, 12 non-woven polypropylene, 13,14 or natural fibres 15 (such as straw, 16 cellulose, 14 or wool 17 ).…”

Section: Introductionmentioning

confidence: 99%

Ultrafast Oleophobic–Hydrophilic Switching Surfaces for Antifogging, Self-Cleaning, and Oil–Water Separation

Brown

Atkinson

Badyal

2014

ACS Appl. Mater. Interfaces

151

123

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. (2014) 'Ultra-fast oleophobic-hydrophilic switching surfaces for anti-fogging, self-cleaning, and oil-water separation.', ACS applied materials interfaces., 6 (10). pp. 7504-7511.Further information on publisher's website:http://dx.doi.org/10.1021/am500882yPublisher's copyright statement:This document is the Accepted Manuscript version of a Published Work that appeared in nal form in ACS Applied Materials Interfaces, copyright c American Chemical Society after peer review and technical editing by the publisher. To access the nal edited and published work see http://pubs.acs.org/doi/abs/10.1021/am500882y. Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. be further enhanced by the incorporation of surface roughness to an extent that it reaches a sufficiently high level (water contact angle <10° and hexadecane contact angle >110°) which, when combined with the inherent ultra-fast switching speed, yields oil-water mixture separation efficiencies exceeding 98%.

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Section: Introductionmentioning

confidence: 99%

Ultrafast Oleophobic–Hydrophilic Switching Surfaces for Antifogging, Self-Cleaning, and Oil–Water Separation

Brown

Atkinson

Badyal

2014

ACS Appl. Mater. Interfaces

151

123

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“…After regeneration of adsorbent bed, the condensed adsorbate can be recovered by separation techniques, multiplying benefits of steam regeneration 8 . Steam regeneration has been repeatedly shown to be very effective and economic to regenerate active carbons and hydrophobic zeolites 20 .…”

Section: Steam Regenerationmentioning

confidence: 99%

“…During steam regeneration unlike purge gas regeneration the temperature don't drop significantly along the length of bed as the heat released due to adsorption is uniform throughout the bed 22 . In Steam regeneration, the high heat of condensation of steam allows the bed to be heated up rapidly, allowing for a faster desorption from the adsorbent; the desorbate is however only swept out of the bed when the latter is hot enough such that at least some steam remains in gaseous form and can sufficiently purge the adsorbate 20 . Steam also activates adsorbent and do not cause polymerization of adsorbate 16 .…”

Section: Steam Regenerationmentioning

confidence: 99%

“…In steam regeneration additional adsorbate is introduced to system as water, which is not desired in both phases and must be removed from adsorber for re-adsorption step 20 . Hence arises need of energy intensive drying step.…”

Section: Steam Regenerationmentioning

confidence: 99%

“…The criteria selected for the mass flow rate of steam is the bed pressure drop and is generally kept same as during adsorption step 20 , however maintaining a minimum flow rate is essential to reduce partial pressure of adsorbates in vapour phase and transfer solvent out of bed 18 .The amount of steam required for regeneration will depend on interaction between solvent and activated carbon 18 . Kuntzel et al 20 on comparison of two different steam flow rates concluded that to achieve same degree of regeneration same amount of steam will be utilized and for high steam flow rate regeneration time will be less and for low steam flow rate time of regeneration will be more. Steam consumption during desorption step can be quantified either as • Grams of steam used per gram of adsorbate desorbed.…”

Section: Reaction Of Steam With Adsorbentmentioning

confidence: 99%

See 2 more Smart Citations

Steam Regeneration of Adsorbents: An Experimental and Technical Review

2013

Chem Sci Trans

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Once adsorption process is over adsorbent is to be discarded as waste. Generation of waste adsorbent is a serious environmental problem. Adsorbents can be regenerated and put to reuse in the same process line. Steam is well known in process industry and can be utilized for regeneration of spent adsorbents. Use of steam for regeneration has multiple benefits however regeneration as a whole process is less studied. This paper reviews the utilization of the steam for regeneration of adsorbents with special reference to technical and experimental aspects.

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Reusing Waste to Save Our Water: Regenerable Bioadsorbents for Effective Oil Sequestration

Machado,

Mulky

2024

ChemBioEng Reviews

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As climate change and environmental damage in the world are rising, the need for efficient waste management and purification is ever‐increasing. At present, the existence of oil in water constitutes a large proportion of this pollution. This oil comes from various sources, including effluents released by industries and oil spills. As such, the removal of oil from marine waters is crucial to combat pollution and preserve the ecology. Bioadsorption has emerged as an efficient method, but the sustainability and eco‐friendliness of this method are yet to be seen. This review summarizes the removal of different types of oil from the marine environment using bioadsorption, i.e., adsorption by biological materials. It briefly describes the adsorption mechanism by means of various bioadsorbents with oil. The preparation and performance of different types of bioadsorbents used in industries are discussed, along with some examples of bioadsorbents that can be applied for the removal of various oils from water. Also, an overview of the regeneration of the adsorbent by various methods is given.

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Regeneration of Hydrophobic Zeolites with Steam

Cited by 12 publications

References 3 publications

Ultrafast Oleophobic–Hydrophilic Switching Surfaces for Antifogging, Self-Cleaning, and Oil–Water Separation

Ultrafast Oleophobic–Hydrophilic Switching Surfaces for Antifogging, Self-Cleaning, and Oil–Water Separation

Steam Regeneration of Adsorbents: An Experimental and Technical Review

Reusing Waste to Save Our Water: Regenerable Bioadsorbents for Effective Oil Sequestration

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