1,246 research outputs found
Flow Reactor Oxidation of Ammonia–Hydrogen Fuel Mixtures
No full textHydrogen-assisted oxidation of ammonia under flow reactor conditions was investigated through experiments and chemical kinetic modeling. Novel experiments, conducted in a tubular laminar flow reactor as a function of the NH3/H-2 ratio, stoichiometry, and temperature (725-1475 K), were analyzed along with literature results from tubular and jet-stirred flow reactors. Ignition and oxidation of NH3 is strongly promoted by the presence of H-2 under all conditions investigated. In general, the behavior is captured well by the kinetic model. With an increasing fraction of H-2 in the fuel mixture, the generation of chain carriers gradually shifts from being controlled by the amine reaction subset to being dominated by the oxidation chemistry of H-2, which is known more accurately. However, under reducing conditions, the H-2 consumption rate is strongly underpredicted. This shortcoming suggests that the thermochemistry of amine radicals and/or the formation of higher amines need further assessment. The present analysis shows that for lean oxidation of NH3/H-2 mixtures in tubular flow reactors, data obtained at higher temperatures, particularly for NO formation, may be strongly affected by the reaction during preheating or by mixing (dependent on reactor design) in the inlet section prior to the isothermal zone. Modeling predictions for the high pressure, medium-temperature ignition conditions in a large diesel engine indicate that NH3/H-2 fuel mixtures may still require a cofuel to secure stable ignition
Carboxylation of carbenes in low-temperature matrixes
No full textPT: J; CR: ADAM W, 1971, J AM CHEM SOC, V93, P557 ADAM W, 1973, J ORG CHEM, V38, P2269 BAMFORD WR, 1952, J CHEM SOC, P4735 BONNEAU R, 1989, J CHEM SOC CHEM COMM, P510 CHAMPAM OL, 1972, J AM CHEM SOC, V94, P1365 COE PL, 1982, J CHEM SOC CHEM COMM, P362 EISENTHAL KB, 1985, TETRAHEDRON, V41, P1543 GANZER GA, 1986, J AM CHEM SOC, V108, P1517 GOULD IR, 1985, TETRAHEDRON, V41, P1587 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 GRILLER D, 1985, TETRAHEDRON, V41, P1525 LIU MTH, 1980, J CHEM SOC CHEM COMM, P1482 LIU MTH, 1987, TETRAHEDRON LETT, V28, P1011 MALTSEV AK, 1985, IAN SSSR KH, P2159 MCMAHON RJ, 1987, J AM CHEM SOC, V109, P2456 MILLIGAN DE, 1962, J CHEM PHYS, V35, P2911 MOSS RA, 1989, ACCOUNTS CHEM RES, V22, P15 PLATZ MS, 1990, KINETICS SPECTROSCOP, P239 PUZA M, 1971, SYNTHESIS-STUTTGART, P481 SANDER W, 1988, ANGEW CHEM INT EDIT, V27, P572 SANDER W, 1988, ANGEW CHEM, V100, P577 SANDER W, 1988, J ORG CHEM, V53, P2091 SANDER W, 1990, ANGEW CHEM INT EDIT, V29, P344 SANDER W, 1990, ANGEW CHEM, V102, P362 SANDER WW, 1987, SPECTROCHIM ACTA A, V43, P637 SANDER WW, 1989, J ORG CHEM, V54, P333 SANDER WW, 1989, J ORG CHEM, V54, P4265 SIEBRAND W, 1986, ACCOUNTS CHEM RES, V19, P238 WHELAND R, 1970, J AM CHEM SOC, V92, P6057; NR: 29; TC: 22; J9: J ORG CHEM; PG: 3; GA: HB875Source type: Electronic(1
What Is It Like to Be a Bat-Author? Viktor Pelevin's Empire V
No full textIn this paper, Viktor Pelevin's novel Empire V (2006) is analysed, with its main concern with the status of language, in fiction as well as in contemporary Russian culture. The work is seen as a kind of sequel to Generation 17: whereas that novel predominantly focused on the problem of consciousness, its problematical relation with reality, but expressed this problem in language, in Empire V the problem of language as the form of consciousness is foregrounded; inevitably thus the status of the text we are reading and the relation it has to its author is problematized - as is the relation it has to its reader. It is a text that reflects on what language, its material, does. The possibility is suggested that this novel tries to rind a way out of postmodernism's anxieties about the conscious personality being an illusion, created by his own language.</p
What Is It Like to Be a Bat-Author? Viktor Pelevin's Empire V
No full textIn this paper, Viktor Pelevin's novel Empire V (2006) is analysed, with its main concern with the status of language, in fiction as well as in contemporary Russian culture. The work is seen as a kind of sequel to Generation 17: whereas that novel predominantly focused on the problem of consciousness, its problematical relation with reality, but expressed this problem in language, in Empire V the problem of language as the form of consciousness is foregrounded; inevitably thus the status of the text we are reading and the relation it has to its author is problematized - as is the relation it has to its reader. It is a text that reflects on what language, its material, does. The possibility is suggested that this novel tries to rind a way out of postmodernism's anxieties about the conscious personality being an illusion, created by his own language.</p
Experimental study of the combustion properties of methane/hydrogen mixtures
No full textIn this thesis the combustion properties of methane / hydrogen mixtures are investigated by measering autoignition delay times in methane/hydrogen mixtures under conditions relevant for gasengines. Moreover HCN and C2H2 measurements have been performed in fuel-rich one dimensional laminar CH4/H2/air flames. All measurements have been compared with numerical calculations.
What Is It Like to Be a Bat-Author? Viktor Pelevin's Empire V
No full textIn this paper, Viktor Pelevin's novel Empire V (2006) is analysed, with its main concern with the status of language, in fiction as well as in contemporary Russian culture. The work is seen as a kind of sequel to Generation 17: whereas that novel predominantly focused on the problem of consciousness, its problematical relation with reality, but expressed this problem in language, in Empire V the problem of language as the form of consciousness is foregrounded; inevitably thus the status of the text we are reading and the relation it has to its author is problematized - as is the relation it has to its reader. It is a text that reflects on what language, its material, does. The possibility is suggested that this novel tries to rind a way out of postmodernism's anxieties about the conscious personality being an illusion, created by his own language.</p
From Sander to Schiavo: Morality, Partisan Politics, and America’s Culture War over Euthanasia, 1950–2010
No full textThe article discusses cultural conflicts and social policies regarding euthanasia in the United states from 1950 to 2010. The author highlights high-profile legal cases related to euthanasia including, the trial of Dr. Herman Sander, the first U.S. physician to stand trial for euthanasia, the case surrounding the termination of coma-patient Terri Schiavo's life support, and the trial of physician Jack Kevorkian. Other topics discussed include the impact of moral activism on politics, U.S. President Ronald Reagan's views on euthanasia, and the U.S. Supreme Court's rulings in euthanasia cases
Desain Rangka Mesin Bandsaw Dan Belt Sander
No full textProgress in the increasingly developing field of technology is an aspect of knowledge and technology that requires higher education to be able to increase their ability to master technology. The purpose of converting energy to machines is to help make human work easier. Plywood/wood cutting machine saw from manual becomes a useful machine for Bengkalis State Polytechnic students. The objectives are 1. To make it easier for the user when cutting plywood, 2. To find out the design process for the bandsaw machine frame and belt sander, 3. To know the planning procedures for the bandsaw machine frame design and belt sander. Study literature used by the author by looking for references related to design to create a project.
In this process, the authors designed a bandsaw and belt sander frame design where the design will be designed in such a way and function as a reference in the process of making the tool, this tool uses an unp iron frame 80 x 45 x 5 mm and hollow iron 30 x 30 x 1.8 mm by using a 1-phase electric motor and also using 2 wheels. This bandsaw saw machine is for cutting plywood and wood of small and large sizes. Belt sander for the sanding process after cutting which is a design with a scale of 1:100.
Keywords: Design Bandsaw And Belt Sander Desig
Experimental study of the combustion properties of methane/hydrogen mixtures
No full textIn this thesis the combustion properties of methane / hydrogen mixtures are investigated by measering autoignition delay times in methane/hydrogen mixtures under conditions relevant for gasengines. Moreover HCN and C2H2 measurements have been performed in fuel-rich one dimensional laminar CH4/H2/air flames. All measurements have been compared with numerical calculations
Experimental study of the combustion properties of methane/hydrogen mixtures
No full textIn this thesis the combustion properties of methane / hydrogen mixtures are investigated by measering autoignition delay times in methane/hydrogen mixtures under conditions relevant for gasengines. Moreover HCN and C2H2 measurements have been performed in fuel-rich one dimensional laminar CH4/H2/air flames. All measurements have been compared with numerical calculations
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