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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
71

The heat capacity of solid Hydrogen-Deuteride /

McGee, Albert Quince January 1973 (has links)
No description available.
72

Anisotropic interactions in dilute orthohydrogen alloys /

Cochran, William Thomas January 1978 (has links)
No description available.
73

Hydrogen future

Whittaker, Alexander January 2015 (has links)
Hydrogen electrolysis has gone through a number of stages in research and applications. From what we can see from this report, there are several ways of producing hydrogen electrolysis, and several applications. The main purposes of this report however, is not to describe what hydrogen electrolysis is and its applications. Research and experiments has already proven that it is a functioning technology. The aim is to gather the necessary information, both theoretically and practically to be able, from a technical and business point of view analyze if this in fact is a realistic solution. To maintain a system of sustainable energy has always been an attractive market and there has existed a number of technologies that has had their share of the fame. However, most of these solutions have shown not to be viable, lucrative or technically scalable. Hence, the important issue to address is whether this is a solution worth investing in. The information gathered for the theory is based on technical reports, academic scripture and literature. All of which can be back tracked to its original source. The practical test is done by using a test kit made for universities and other institutes to better understand how hydrogen electrolysis works. The materials used are all scientifically acceptable according to the theories and technologies surrounding hydrogen electrolysis. Hence, the data gathered from the test kits are all accurate according to current research.
74

Design principles for multifunctional microchemical systems application to portable hydrogen production /

Deshmukh, Soumitra R.. January 2006 (has links)
Thesis (Ph.D.)--University of Delaware, 2006. / Principal faculty advisor: Dionisios G. Vlachos, Dept.of Chemical Engineering. Includes bibliographical references.
75

Temperature and concentration dependence of hydrogen diffusion in vanadium measured by optical transmission

Book, Stefan January 2014 (has links)
Hydrogen diffusion is investigated in a 50 nm film of vanadium and a vanadium superlattice. Diffusion constants for three different temperature and pressure pairs are determined for the 50 nm film. The diffusion constants for the temperature and pressure pairs are determined to be 4.5 $\pm$ 0.1 $\cdot 10^{-5} \text{ cm}^{-2}$ at 463 K and 0.05 H/V, 5.6 $\pm$ 0.1 $\cdot 10^{-5} \text{ cm}^{-2}$ at 463 K and 0.12 H/V and 8.0 $\pm$ 0.2 $\cdot 10^{-5} \text{ cm}^{-2}$ at 493 K and 0.05 H/V. The temperature and concentration dependence of the diffusion constants are determined. A concentration dependence of the diffusion constant is found with a higher rate of diffusion for a higher hydrogen concentration. The activation energy of chemical diffusion is determined to be 0.38 $\pm$ 0.03 eV.
76

The Icelandic example : planning for hydrogen fueled transportation in Oregon /

Fisher, Jeffrey Dean, January 2009 (has links)
Typescript. Includes vita and abstract. Includes bibliographical references (leaves 85-91). Also available online in Scholars' Bank.
77

Vehicle & infrastructure relationships in hydrogen transportation networks : development of the H₂VISION modeling tool /

Meyer, Patrick E. January 2006 (has links)
Thesis (M.S.)--Rochester Institute of Technology, 2006. / Typescript. Includes bibliographical references (leaves 164-168).
78

Studies on catalyst materials and operating conditions for ammonia decomposition / アンモニア分解における触媒材料及び動作条件の研究

Younghwan, Im 24 November 2021 (has links)
京都大学 / 新制・課程博士 / 博士(工学) / 甲第23578号 / 工博第4933号 / 新制||工||1770(附属図書館) / 京都大学大学院工学研究科物質エネルギー化学専攻 / (主査)教授 江口 浩一, 教授 陰山 洋, 教授 阿部 竜 / 学位規則第4条第1項該当 / Doctor of Philosophy (Engineering) / Kyoto University / DGAM
79

Kinetics of the Catalytic Decomposition of Methane into Pure Hydrogen and Carbon on a Silica-Supported Nickel Catalyst

Babkoor, Mohammed 12 1900 (has links)
The catalytic decomposition of methane offers an interesting route to obtain a stream of pure COx-free hydrogen and carbon materials in the solid phase with potential applications to improve the viability of the process. In this work, we have studied the kinetics of this process using a silica-supported nickel catalyst in a packed bed reactor. In order to ensure the intrinsic kinetic regime, the effects of external and mass transfer on the overall kinetics were examined at relevant reaction conditions. The external mass transfer was found to affect the kinetics at 500 ⁰C and a space velocity of 80 h–1. The internal mass transfer was found to not limit the kinetics when a catalyst particle size in the range of 1000-2000 µm was used. Within the intrinsic kinetic regime, we found that the reaction order with respect to methane is in the range of 0.77-0.94, the activation energy is 110 kJ mol–1 and the rate determining step is the dissociation of the first C-H bond. In addition, the kinetics of the catalyst deactivation follows a first-order behavior with respect to the activity of the catalyst, with an activation energy of 125 kJ mol–1. At the end of the study, a mathematical model for the best-fit model was found using MATLAB. With the whole set of data, the best fit is obtained with a Langmuir-Hinshelwood type rate law.
80

COINCIDENCE DETECTION OF PROTONS AND METASTABLE HYDROGEN ATOMS FROM DISSOCIATIVE IONIZATION OF MOLECULAR HYDROGEN BY ELECTRON IMPACT (TIME-OF-FLIGHT).

CHO, HYUCK. January 1985 (has links)
A coincidence has been observed between H(2S) and H⁺ fragments resulting from the bombardment of H₂ with 100 eV electrons. A significant source of this coincidence is believed to be the 2sσ(g) state of H₂⁺. The time-of-flight (TOF) distribution of H(2S) fragments from the 2sσ(g) state was measured and converted to the kinetic energy distribution from which the potential energy of the 2sσ(g) state in the Franck-Condon region was constructed. The result is in good agreement with a published calculation.

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