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Raymond Gorte
Raymond John Gorte is an American chemical engineer, currently the Russel Pearce and Elizabeth Crimian Heuer Endowed Professor of Chemical and Biomolecular Engineering (CBE) and Materials Science & Engineering (MSE) at the University of Pennsylvania. Throughout his career at the University of Pennsylvania and the University of Minnesota, he has advanced the study of fuel cells and catalysts including heterogeneous metals and zeolite materials. He is a member of the U.S. National Academy of Engineering. Early life and education Gorte was born in Wisconsin and grew up in Manitowoc, Wisconsin. In 1976, he earned a Bachelor of Science in chemical engineering from the University of Wisconsin-Madison. He completed his Ph.D. in chemical engineering at the University of Minnesota in 1981 with advisor Lanny D. Schmidt on the topic of platinum catalysis of nitric oxide decomposition. His thesis was published in 1981 with the title, "The Kinetic Interaction of Nitric-Oxide with Single Cr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manitowoc, Wisconsin
Manitowoc ( ) is a city in Manitowoc County, Wisconsin, United States, and its county seat. It is located on Lake Michigan at the mouth of the Manitowoc River. According to the 2020 census, Manitowoc had a population of 34,626. History Purported to mean ''dwelling of the Manitou, great spirit'', Manitowoc derived its name from either the Ojibwe word ''manidoowaak(wag)'', meaning spirit-spawn(s), or ''manidoowaak(oog)'', meaning spirit-wood(s), or ''manidoowak(iin)'', meaning spirit-land(s). In the Menominee language, it is called ''Manetōwak'', which means "place of the spirits". The Menominee ceded this land to the United States in the 1836 Treaty of the Cedars, following years of negotiations over how to accommodate the Oneida Indian Nation, Oneida, Stockbridge-Munsee Community, Stockbridge-Munsee, and Brothertown Indians, Brothertown peoples who had been Indian removal, removed from New York to Wisconsin. In 1838, an act of the Territorial Legislature separated Manitowoc Coun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philadelphia
Philadelphia ( ), colloquially referred to as Philly, is the List of municipalities in Pennsylvania, most populous city in the U.S. state of Pennsylvania and the List of United States cities by population, sixth-most populous city in the United States, with a population of 1,603,797 in the 2020 United States census, 2020 census. The city is the urban core of the Philadelphia metropolitan area (sometimes called the Delaware Valley), the nation's Metropolitan statistical area, seventh-largest metropolitan area and ninth-largest combined statistical area with 6.245 million residents and 7.379 million residents, respectively. Philadelphia was founded in 1682 by William Penn, an English Americans, English Quakers, Quaker and advocate of Freedom of religion, religious freedom, and served as the capital of the Colonial history of the United States, colonial era Province of Pennsylvania. It then played a historic and vital role during the American Revolution and American Revolutionary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Interaction Energy
In physics, interaction energy is the contribution to the total energy that is caused by an interaction between the objects being considered. The interaction energy usually depends on the relative position of the objects. For example, Q_1 Q_2 / (4 \pi \varepsilon_0 \Delta r) is the electrostatic interaction energy between two objects with charges Q_1, Q_2. Interaction energy A straightforward approach for evaluating the interaction energy is to calculate the difference between the objects' combined energy and all of their isolated energies. In the case of two objects, ''A'' and ''B'', the interaction energy can be written as: Theoretical and Computational Chemistry, 1999, Ideas of Quantum Chemistry, 2007 and Quantum Magnetic Resonance Imaging Diagnostics of Human Brain Disorders, 2010 \Delta E_\text = E(A,B) - \left( E(A) + E(B) \right), where E(A) and E(B) are the energies of the isolated objects (monomers), and E(A,B) the energy of their interacting assembly (dimer). For large ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proton Affinity
The proton affinity (PA, ''E''pa) of an anion or of a neutral atom or molecule is the negative of the enthalpy change in the reaction between the chemical species concerned and a proton in the gas phase: ::: A- + H+ -> HA ::: B + H+ -> BH+ These reactions are always exothermic in the gas phase, i.e. energy is released ( enthalpy is negative) when the reaction advances in the direction shown above, while the proton affinity is positive. This is the same sign convention used for electron affinity. The property related to the proton affinity is the gas-phase basicity, which is the negative of the Gibbs energy for above reactions, i.e. the gas-phase basicity includes entropic terms in contrast to the proton affinity. Acid/base chemistry The higher the proton affinity, the stronger the base and the weaker the conjugate acid ''in the gas phase''. The (reportedly) strongest known base is the ortho-diethynylbenzene dianion (''E''pa = 1843 kJ/mol), followed by the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thermochemistry
Thermochemistry is the study of the heat energy which is associated with chemical reactions and/or phase changes such as melting and boiling. A reaction may release or absorb energy, and a phase change may do the same. Thermochemistry focuses on the energy exchange between a system and its surroundings in the form of heat. Thermochemistry is useful in predicting reactant and product quantities throughout the course of a given reaction. In combination with entropy determinations, it is also used to predict whether a reaction is spontaneous or non-spontaneous, favorable or unfavorable. Endothermic reactions absorb heat, while exothermic reactions release heat. Thermochemistry coalesces the concepts of thermodynamics with the concept of energy in the form of chemical bonds. The subject commonly includes calculations of such quantities as heat capacity, heat of combustion, heat of formation, enthalpy, entropy, and free energy. Thermochemistry is one part of the broader field o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Faujasite
Faujasite (FAU-type zeolite) is a mineral group in the zeolite family of silicate minerals. The group consists of faujasite-Na, faujasite-Mg and faujasite-Ca. They all share the same basic formula by varying the amounts of sodium, magnesium and calcium. Faujasite occurs as a rare mineral in several locations worldwide. Faujasite materials are widely synthesized industrially. The relatively low-silica (Si/Al2) one is called Zeolite Y. In addition, the aluminum component in zeolite Y can be removed by acid-treatment and/or steam-treatment, and the resulting faujasite is called USY (Ultrastable zeolite Y). USY is used in fluid catalytic cracking process as a catalyst. Discovery and occurrence Faujasite was first described in 1842 from an occurrence in the Limberg Quarries, Sasbach am Kaiserstuhl, Sasbach, Kaiserstuhl (Baden-Württemberg), Kaiserstuhl, Baden-Württemberg, Germany. The sodium modifier faujasite-Na was added following the discovery of the magnesium and calcium rich ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ZSM-5 Oil Company in 1975, it is widely used in the as a heterogeneous catalyst for reactions.
ZSM-5, Zeolite Socony Mobil–5 (framework type MFI from ZSM-5 (five)), is an aluminosilicate zeolite belonging to the pentasil family of zeolites. Its chemical formula is NanAlnSi96–nO192·16H2O (0 St ...
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Amorphous Silica-alumina
Amorphous silica-alumina is a synthetic substance that is used as a catalyst or catalyst support. Julius Scherzer, Adrian J. Gruia, (1996), ''Hydrocracking Science and Technology'', CRC Press, It can be prepared in a number of ways for example: * Precipitation of hydrous alumina onto amorphous silica hydrogel * Reacting a silica sol with an alumina sol * Coprecipitation from sodium silicate / aluminium salt solution Water-soluble contaminants, e.g. sodium salts, are removed by washing. Some of the alumina is present in tetrahedral coordination as shown by NMR studies 29Si MASNMR and 27Al NMR Amorphous silica-alumina contains sites which are termed Brønsted acid (or protic) sites, with an ionizable hydrogen atom, and Lewis acid (aprotic), electron accepting sites and these different types of acidic site can be distinguished by the ways in which, say, pyridine attaches. On Lewis acid sites it forms complexes and on the Brønsted sites it adsorbs as the pyridinium ion. As of 20 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solid Acid
Solid acids are acids that are insoluble in the reaction medium. They are often used as heterogeneous catalysts. Many solid acids are zeolites. A variety of techniques are used to quantify the strength of solid acids. Examples Examples of inorganic solid acids include silico-aluminates (zeolites, alumina, silico-aluminophosphate), and sulfated zirconia. Many transition metal oxides are acidic, including titania, zirconia, and niobia. Such acids are used in cracking. Many solid Brønsted acids are also employed industrially, including polystyrene sulfonate, solid phosphoric acid, niobic acid, and hetero polyoxometallates. Applications Solid acids are used in catalysis in many industrial chemical processes, from large-scale catalytic cracking in petroleum refining to the synthesis of various fine chemicals. One large scale application is alkylation, e.g., the combination of benzene and ethylene to give ethylbenzene. Another application is the rearrangement of cyclohex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerium(IV) Oxide
Cerium(IV) oxide, also known as ceric oxide, ceric dioxide, ceria, cerium oxide or cerium dioxide, is an oxide of the rare-earth metal cerium. It is a pale yellow-white powder with the chemical formula CeO2. It is an important commercial product and an intermediate in the purification of the element from the ores. The distinctive property of this material is its reversible conversion to a Non-stoichiometric compound, non-stoichiometric oxide. Production Cerium occurs naturally as oxides, always as a mixture with other rare-earth elements. Its principal ores are bastnaesite and monazite. After extraction of the metal ions into aqueous base, Ce is separated from that mixture by addition of an oxidant followed by adjustment of the pH. This step exploits the low solubility of CeO2 and the fact that other rare-earth elements resist oxidation.. Cerium(IV) oxide is formed by the calcination of cerium oxalate or cerium hydroxide. Cerium also forms cerium(III) oxide, , which is unst ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anode
An anode usually is an electrode of a polarized electrical device through which conventional current enters the device. This contrasts with a cathode, which is usually an electrode of the device through which conventional current leaves the device. A common mnemonic is ACID, for "anode current into device". The direction of conventional current (the flow of positive charges) in a circuit is opposite to the direction of electron flow, so (negatively charged) electrons flow from the anode of a galvanic cell, into an outside or external circuit connected to the cell. For example, the end of a household battery marked with a "+" is the cathode (while discharging). In both a galvanic cell and an electrolytic cell, the anode is the electrode at which the oxidation reaction occurs. In a galvanic cell the anode is the wire or plate having excess negative charge as a result of the oxidation reaction. In an electrolytic cell, the anode is the wire or plate upon which excess positive charge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Methane
Methane ( , ) is a chemical compound with the chemical formula (one carbon atom bonded to four hydrogen atoms). It is a group-14 hydride, the simplest alkane, and the main constituent of natural gas. The abundance of methane on Earth makes it an economically attractive fuel, although capturing and storing it is difficult because it is a gas at standard temperature and pressure. In the Earth's atmosphere methane is transparent to visible light but absorbs infrared radiation, acting as a greenhouse gas. Methane is an Organic chemistry, organic Organic compound, compound, and among the simplest of organic compounds. Methane is also a hydrocarbon. Naturally occurring methane is found both below ground and under the seafloor and is formed by both geological and biological processes. The largest reservoir of methane is under the seafloor in the form of methane clathrates. When methane reaches the surface and the Atmosphere of Earth, atmosphere, it is known as atmospheric methane. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
