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Institution

Lehigh University

EducationBethlehem, Pennsylvania, United States
About: Lehigh University is a education organization based out in Bethlehem, Pennsylvania, United States. It is known for research contribution in the topics: Catalysis & Fracture mechanics. The organization has 12684 authors who have published 26550 publications receiving 770061 citations.


Papers
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Journal ArticleDOI
TL;DR: Les polymeres acides (chlorure polyvinylique surchlore, fluorure de polyvinyle and fluorure polybutyral vinylique) absorbent fortement les vapeurs de solvants basiques as mentioned in this paper.
Abstract: Les polymeres acides (chlorure polyvinylique surchlore, fluorure de polyvinyle, fluorure de polyvinylidene, polybutyral vinylique) absorbent fortement les vapeurs de solvants basiques et les polymeres basiques (PMMA) absorbent fortement les vapeurs de solvants acides. Importance des proprietes acidobasiques des polymeres dans l'adherence au verre

165 citations

Journal ArticleDOI
TL;DR: In this paper, a thorough calorimetric investigation of graphite-supported iridium particle chemistry was conducted, and the results indicated that differential calorimeters can be valuable tools for providing information of the type required for detailed kinetic modeling of reactions taking place on catalyst surfaces.
Abstract: Summary A thorough calorimetric investigation of graphite-supported iridium particle chemistry was conducted. A careful determination of the particle size distribution assisted in the interpretation. The stoichiometry of oxygen, carbon monoxide, and hydrogen was determined: CO/Ir, = 0.50, O/h, = 1.0, H/h, = 1.0. The differential heats of adsorption of these molecules on the iridium surface was found to be very similar to those reported for alumina-supported iridium particles, suggesting support effects are minimal. Differential rate data were made available for the first time. It is clear that this basic information regarding adsorption stoichiometries, rates, and heats will be useful in future studies of the surface composition of multimetallic supported catalysts that contain iridium. The calorimeter allowed a study of the interaction between hydrogen and oxygen on an iridium surface. The rate, heat, stoichiometry, and sequence of steps that occur when differential hydrogen reduction of a preoxidized surface is carried out were all studied. It was found that the heat of reaction and the rate of reaction between dosed hydrogen and adsorbed oxygen progressively decreased. The measured integral heat, however, agreed with a simple thermodynamic model. The results of this study suggests that differential calorimeters can be valuable tools for providing information of the type required for detailed kinetic modeling of reactions taking place on catalyst surfaces. They also suggest that this type of calorimetry can provide detailed insight into the mechanism of surface reaction, an area of intense research at the present time.

165 citations

Journal ArticleDOI
TL;DR: Knowledge of organ donation facts was found to be related to whether subjects carried or requested an organ donor card, their attitude towards organ donation and their willingness to donate their own organs or the organs of a deceased loved one.

165 citations

Journal ArticleDOI
TL;DR: The divided-wall column is a practical way to implement the topology of the Petlyuk column that features two columns (a prefractionator into which the feed is introduced and a main column from which a sidestream product is withdrawn) with interconnected vapor and liquid streams arising from a single reboiler and a single condenser as mentioned in this paper.
Abstract: Industrial applications of the divided-wall column for the separation of ternary mixtures have increased in recent years with about 40 columns reported to be in service. The divided-wall column is a practical way to implement the topology of the Petlyuk column that features two columns (a prefractionator into which the feed is introduced and a main column from which a sidestream product is withdrawn) with interconnected vapor and liquid streams arising from a single reboiler and a single condenser. Many papers discuss the steady-state design issues and propose heuristic and rigorous design optimization methods. The dynamic control of the divided-wall column has been explored in a relatively small number of papers. Control is more difficult than with a conventional two-column separation sequence because there is more interaction among controlled and manipulated variables since the four sections of the column are coupled. The vapor split is fixed at the design stage and cannot be changed during operation, b...

165 citations

Journal ArticleDOI
14 Aug 2003-Nature
TL;DR: It is found that the long profiles of beds of highly erosive glaciers tend towards steady-state angles opposed to and slightly more than 50 per cent steeper than the overlying ice–air surface slopes, and that additional subglacial deepening must be enabled by non-glacial processes.
Abstract: Glaciers often erode, transport and deposit sediment much more rapidly than nonglacial environments1, with implications for the evolution of glaciated mountain belts and their associated sedimentary basins. But modelling such glacial processes is difficult, partly because stabilizing feedbacks similar to those operating in rivers2,3 have not been identified for glacial landscapes. Here we combine new and existing data of glacier morphology and the processes governing glacier evolution from diverse settings to reveal such stabilizing feedbacks. We find that the long profiles of beds of highly erosive glaciers tend towards steady-state angles opposed to and slightly more than 50 per cent steeper than the overlying ice–air surface slopes, and that additional subglacial deepening must be enabled by non-glacial processes. Climatic or glaciological perturbations of the ice–air surface slope can have large transient effects on glaciofluvial sediment flux and apparent glacial erosion rate.

165 citations


Authors

Showing all 12785 results

NameH-indexPapersCitations
Yang Yang1712644153049
Gang Chen1673372149819
Yi Yang143245692268
Mark D. Griffiths124123861335
Michael Gill12181086338
Masaki Mori110220066676
Kai Nan An10995351638
James R. Rice10827868943
Vinayak P. Dravid10381743612
Andrew M. Jones10376437253
Israel E. Wachs10342732029
Demetrios N. Christodoulides10070451093
Bert M. Weckhuysen10076740945
José Luis García Fierro100102747228
Mordechai Segev9972940073
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202338
2022140
20211,040
20201,054
2019933
2018935