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University of Massachusetts Amherst

2004

Articles 31 - 43 of 43

Full-Text Articles in Chemical Engineering

H. Pacific Polymer Federation Conference Reports, Otto Vogl Jan 2004

H. Pacific Polymer Federation Conference Reports, Otto Vogl

Emeritus Faculty Author Gallery

Reports of the first through the sixth Pacific Polymer Federation Conferences, held biennially 1989-1999. Also includes reporting on the Pacific Polymer Federation.

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Influence Of Boundary Slip On The Optimal Excitations In Thermocapillary Driven Spreading, Jm Davis, Sm Troian Jan 2004

Influence Of Boundary Slip On The Optimal Excitations In Thermocapillary Driven Spreading, Jm Davis, Sm Troian

Jeffrey M. Davis

Thin liquid films driven to spread on homogeneous surfaces by thermocapillarity can undergo frontal breakup and parallel rivulet formation with well-defined wavelength. Previous modal analyses have relieved the well-known divergence in stress that occurs at a moving contact line by matching the front region to a precursor film. Because the linearized disturbance operator is non-normal, a generalized, nonmodal analysis is required to probe film stability at all times. The effect of the contact line model on nonmodal stability has not been previously investigated. This work examines the influence of boundary slip on thermocapillary driven spreading using a transient stability analysis, …

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Renewable Alkanes By Aqueous-Phase Reforming Of Biomass-Derived Oxygenates, George W. Huber, R. D. Cortright, J. A. Dumesic Jan 2004

Renewable Alkanes By Aqueous-Phase Reforming Of Biomass-Derived Oxygenates, George W. Huber, R. D. Cortright, J. A. Dumesic

George W. Huber

A clean stream of alkanes from renewable biomass resources is obtained through aqueous-phase reforming in a single reactor. Alkanes are produced from biomass-derived sorbitol through a bifunctional pathway (see scheme) that involves the dehydration of sorbitol on acid sites (SiO2/Al2O3) and hydrogenation of intermediates on a metal catalyst under a H2 atmosphere. Hydrogen is produced from sorbitol and water on the metal catalyst in the same reactor.

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Effect Of Sn On The Reactivity Of Cu Surfaces, George W. Huber, A. Gokale, J. A. Dumesic, M. Mavrikakis Jan 2004

Effect Of Sn On The Reactivity Of Cu Surfaces, George W. Huber, A. Gokale, J. A. Dumesic, M. Mavrikakis

George W. Huber

Periodic, density functional theory (DFT-GGA) calculations, using PW91 (self-consistently) and RPBE functionals, have been employed to determine preferred binding sites, adsorbate structures, and binding energies for the adsorption of atomic (H, N, O, S, and C), molecular (NO and CO), and radical (OH) species on Cu(111) and CuSn(0001) alloy surfaces. Our results indicate the following order in the binding energies from the least to the most strongly bound:  NO < CO < H < OH < N < O < S < C for Cu-terminated CuSn(0001). On Cu(111), the corresponding relative order of adsorbates from the least strongly bound to the most strongly bound is CO < NO < H < OH < N < O < S < C. On the Sn-terminated CuSn(0001) surface, CO does not adsorb and the relative order of adsorbates from the least strongly bound to the most strongly bound is NO < H < OH < N < S < O < C. For all adsorbates, the binding on Cu-terminated CuSn(0001) is stronger than on Cu(111), resulting from a combination of electronic and strain effects caused by the addition of Sn to Cu. CO dissociation is endothermic on Cu-terminated CuSn(0001) and Cu(111) surfaces, while CO oxidation is exothermic on these surfaces. OH dissociation is endothermic on all three surfaces. On all surfaces studied, thermodynamics of NO decomposition are much more favorable than those of CO and OH dissociation on the corresponding surfaces. Our microcalorimetric studies of the interaction of NO with Cu/SiO2 and Cu6Sn5/SiO2 samples give initial heats of 270 (2.80 eV) and 130 (1.35 eV) kJ/mol, respectively. These values correspond to the decomposition of NO to give adsorbed oxygen plus gaseous N2 on Cu/SiO2 and adsorbed oxygen plus gaseous N2O on the Sn-terminated phase of Cu6Sn5/SiO2.

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8th Bratislava International Conference On Modified Polymers: Modpol2003, Otto Vogl, Maria Omastova Jan 2004

8th Bratislava International Conference On Modified Polymers: Modpol2003, Otto Vogl, Maria Omastova

Otto Vogl

No abstract provided.

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A. Cover Page, Title Page, Table Of Contents, And Forward, Otto Vogl Jan 2004

A. Cover Page, Title Page, Table Of Contents, And Forward, Otto Vogl

Otto Vogl

The History of the Pacific Polymer Federation (PPF) describes the background and pursuit that was needed to create the PPF and bring it to a functioning organization. It includes a general description, as well as edited Pacific Polymer Newsletters and articles that have been written in Polymer News describing additional PPF activities and the Pacific Polymer Conferences.

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D. Founding Of The Pacific Polymer Federation, Otto Vogl Jan 2004

D. Founding Of The Pacific Polymer Federation, Otto Vogl

Otto Vogl

An account of the process which led to the founding of the Pacific Polymer Federation and a copy of the Constitution of the Pacific Polymer Federation.

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E. President Of The Pacific Polymer Federation, Otto Vogl Jan 2004

E. President Of The Pacific Polymer Federation, Otto Vogl

Otto Vogl

A history of the first president of the Pacific Polymer Federation.

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H. Pacific Polymer Federation Conference Reports, Otto Vogl Jan 2004

H. Pacific Polymer Federation Conference Reports, Otto Vogl

Otto Vogl

Reports of the first through the sixth Pacific Polymer Federation Conferences, held biennially 1989-1999. Also includes reporting on the Pacific Polymer Federation.

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G. Excerpts Of Pacific Polymer Federation Newsletters, Otto Vogl Jan 2004

G. Excerpts Of Pacific Polymer Federation Newsletters, Otto Vogl

Otto Vogl

Excerpts of Pacific Polymer Federation Newsletters 1-13, 1989-2003. Covers the presidencies of Otto Vogl, Takeo Saegusa, Joseph Salamone, Chung Yup Kim, Fosong Wang, Takeshi Ogawa, and Supawan Tantayanon.

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F. Growth Of The Pacific Polymer Federation, Otto Vogl Jan 2004

F. Growth Of The Pacific Polymer Federation, Otto Vogl

Otto Vogl

Describes the growth and development of the Pacific Polymer Federation,

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B. The Signing Of The Constitution Of The Pacific Polymer Federation, Otto Vogl Jan 2004

B. The Signing Of The Constitution Of The Pacific Polymer Federation, Otto Vogl

Otto Vogl

The Constitution of the Pacific Polymer Federation was signed on October 19, 1987 in Tokyo, Japan at the Inter-national House in Roppongi, Tokyo by the Chairman of the ACS Division of Polymer Chemistry, S, R. Eby, and the Chair-man of the Foreign Affairs Committee, O. Vogl; by the President of the Society of Polymer Science Japan, M. Takayanagi; Chairman and Vice President for International Affairs, A. Abe. For the Polymer Division of the Royal Aus-tralian Institute of Chemistry, Chairman D.J.T. Hill and Chair-man of the International Committee, J.H. O'Donnell signed the Constitution.

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C. Pacific Polymer Federation Presidents, Otto Vogl Jan 2004

C. Pacific Polymer Federation Presidents, Otto Vogl

Otto Vogl

Names and photographs of the presidents of the Pacific Polymer Federation.

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