Equilibrium and kinetics of adsorption of high molecular weight n-paraffins on a calcium LTA molecular sieve

Águeda, V.I.; Uguina, M.Á.; Delgado, José A.; Holik, M. T.; Aranda, Daniel; López, Ignacio; Lázaro, Jesús; Peláez, Javier

doi:10.1007/s10450-016-9846-1

Cited by 11 publications

(3 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These trends were opposing, thus indicating the possibility of obtaining different products depending on the process arrangement. Similar observations were made later on different type X and Y zeolites [223] and on 5A zeolite [224]. The effects of material polarity (Si/Al ratio) and pore size on adsorption have been studied as well on a range of materials [52,225].…”

Section: Linear From Branched Hydrocarbonssupporting

confidence: 65%

Nanoporous Materials for Gas Storage

Ania

Raymundo-Piñero²

2019

Green Energy and Technology

View full text Add to dashboard Cite

the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilms or in any other physical way, and transmission or information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed. The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. The publisher, the authors, and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher nor the authors or the editors give a warranty, express or implied, with respect to the material contained herein or for any errors or omissions that may have been made. The publisher remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

show abstract

Section: Linear From Branched Hydrocarbonssupporting

confidence: 65%

Nanoporous Materials for Gas Storage

Ania

Raymundo-Piñero²

2019

Green Energy and Technology

View full text Add to dashboard Cite

show abstract

“…Due to equilibrium limitations, low temperatures are needed in order to minimize hydrocracking. ,, A strategy which prevents hydrocracking from taking place and thus increases the yield and productivity of the unit includes separation of the branched products from the effluent and recycling of the linear and monobranched hydrocarbons to the head of the unit. , The separation of linear from branched isomers is done by adsorption using zeolite 5A as the adsorbent. This zeolite has been implemented in liquid- (SMB) and vapor-phase (VSA/TSA) hydrocarbon separation processes since the 1960s. ,,,− In fact, molecular sieving separations of linear and branched paraffins were one of the first major industrial successes of zeolites. ,,, Other zeolites, such as X, Y, and ZSM-5, have been commercialized for this purpose, as well. − …”

Section: Chemical Separations By Zeolitesmentioning

confidence: 99%

Zeolites in Adsorption Processes: State of the Art and Future Prospects

2022

View full text Add to dashboard Cite

Zeolites have been widely used as catalysts, ion exchangers, and adsorbents since their industrial breakthrough in the 1950s and continue to be state-of the-art adsorbents in many separation processes. Furthermore, their properties make them materials of choice for developing and emerging separation applications. The aim of this review is to put into context the relevance of zeolites and their use and prospects in adsorption technology. It has been divided into three different sections, i.e., zeolites, adsorption on nanoporous materials, and chemical separations by zeolites. In the first section, zeolites are explained in terms of their structure, composition, preparation, and properties, and a brief review of their applications is given. In the second section, the fundamentals of adsorption science are presented, with special attention to its industrial application and our case of interest, which is adsorption on zeolites. Finally, the state-of-the-art relevant separations related to chemical and energy production, in which zeolites have a practical or potential applicability, are presented. The replacement of some of the current separation methods by optimized adsorption processes using zeolites could mean an improvement in terms of sustainability and energy savings. Different separation mechanisms and the underlying adsorption properties that make zeolites interesting for these applications are discussed.

show abstract

“…Alkandary et al reported that for a liquid mixture of linear paraffins with isooctane (iC8), the adsorption equilibrium of C12–C20 n -alkanes in the 5A zeolite at room temperature (RT) is established after several dozen hours. In another work, Águeda et al studied the adsorption equilibrium and kinetics of n C5, n C10, n C14, and n C18 mixed with iC8 in Ca-LTA, reporting the highest sorption capacity for n C10 and the highest affinity for n C14. Silva and Rodriguez , obtained type I adsorption isotherms of n C5 and n C6 in pellets of zeolite 5A at a temperature of 373 K or higher.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Alkanes in Zeolites LTA and FAU: Quasi-Equilibrated Thermodesorption Supported by Molecular Simulations

et al. 2019

View full text Add to dashboard Cite

Adsorption of n-alkanes from pentane to decane (C5−C10) in zeolites LTA (ITQ-29 and 5A) and faujasite (FAU, dealuminated high-silica Na-FAU, NaY, and NaX) as well as branched hexane isomers in FAU was investigated by means of experimental quasi-equilibrated temperature-programmed desorption and adsorption (QE-TPDA) and theoretical Monte Carlo molecular simulations. A novel QE-TPDA method of studying porosity provided highquality desorption−adsorption profiles and adsorption isobars of hydrocarbons. A unique two-step adsorption of long-chain alkanes in LTA zeolites was observed and explained in detail based on the results of the theoretical calculations. Although adsorption of n-alkanes in FAU is a one-step process, it also does not occur in a uniform manner because of strong lateral interactions at high loadings. We also investigated the influence of cation content on adsorption equilibrium and energetics for the studied adsorbent−adsorbate systems, finding a nonlinear relation between heat of adsorption and content of cations in FAU. Investigations on packing of the molecules of n-alkanes were also performed, revealing relations between chain length of the probe molecule and sorption capacity of the studied materials.

show abstract

Equilibrium and kinetics of adsorption of high molecular weight n-paraffins on a calcium LTA molecular sieve

Cited by 11 publications

References 25 publications

Nanoporous Materials for Gas Storage

Nanoporous Materials for Gas Storage

Zeolites in Adsorption Processes: State of the Art and Future Prospects

Adsorption of Alkanes in Zeolites LTA and FAU: Quasi-Equilibrated Thermodesorption Supported by Molecular Simulations

Contact Info

Product

Resources

About