Topic
Buffer gas
About: Buffer gas is a research topic. Over the lifetime, 3565 publications have been published within this topic receiving 47283 citations.
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17 Nov 1998
TL;DR: In this paper, a process for producing at least an oxygen product gas stream, and power from a gas turbine, by compressing a feed gas stream containing elemental oxygen and heating it on the retentate side of an ion transport reactor membrane section, is presented.
Abstract: A process for producing at least an oxygen product gas stream, and power from a gas turbine, by compressing a feed gas stream containing elemental oxygen and heating the feed gas stream on the retentate side of an ion transport reactor membrane section to produce a heated feed gas stream. Oxygen permeating the ion transport reactor membrane section is reacted with a first fuel gas stream to produce a first combustion products gas stream. The heated feed gas stream is separated using an ion transport separator membrane section having a retentate side and a permeate side into an oxygen-depleted gas stream on the retentate side and an oxygen-containing gas stream on the permeate side. At least a portion of the first combustion products gas stream can be recovered, and energy is extracted from at least one gas stream to be expanded in a gas turbine to produce energy.
30 citations
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TL;DR: A simple strontium vapor cell is described, characterized using laser spectroscopy, and was found to offer stable and robust operation, with an estimated lifetime of >10 000 h.
Abstract: We describe a simple strontium vapor cell for laser spectroscopy experiments. Strontium vapor is produced using an electrically heated commercial dispenser source. The sealed cell operates at room temperature, and without a buffer gas or vacuum pump. The cell was characterized using laser spectroscopy, and was found to offer stable and robust operation, with an estimated lifetime of >10 000 h. By changing the dispenser, this technique can be readily extended to other alkali and alkaline earth elements.
30 citations
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TL;DR: In this article, the authors investigated photodecomposition of dimethylnitrosamine in the gas phase following irradiation into the S1 (nπ*) S0 (363.5 nm) and S2 (ππ*)S0 (248.1 nm) transitions at room temperature.
Abstract: Photodecomposition of dimethylnitrosamine in the gas phase ( ∼ 1 Torr) has been investigated following irradiation into the S1 (nπ*) S0 (363.5 nm) and S2 (ππ*) S0 (248.1 nm) transitions at room temperature. With a quantum yield of unity, excitation into the S1 state yields the fragments (CH3)2N⋅ and NO which then recombine leaving no photoproducts. The addition of O2 results in only one photoproduct, (CH3)2NNO2. Irradiating into the S2 state, the products CH2NCH3, (CH2NCH3)3, CH2NOH, N2O, NO, H2, and N2 were identified by capillary gas chromatography mass spectrometry. In the presence of N2 as a buffer gas the photoproducts are only CH2NCH3, (CH2NCH3)3, N2O, and H2. For both excitation conditions a mechanism is proposed involving cleavage of the N, N-bond as the main primary photolytic process.
30 citations
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TL;DR: In this paper, the authors studied the time-resolved emission spectra from the plasma induced by laser ablation of uranium samples and proposed a model that explains qualitatively the phenomena that are responsible for this time behaviour.
30 citations
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01 Jan 1954
TL;DR: In this paper, the authors estimate the total distance traveled by a car after running out of gas by using velocity measurements as the car decelerates and using a function to approximate the data, thereby allowing them to use a Riemann sum.
Abstract: Elena and J. T. are cruising at 65 mph (95 feet per second) on their way to Calculus Camp when their car runs out of gas. Elena sees a sign posted at the side of the freeway stating " GAS – ONE MILE ". She quickly decides to determine how far the car will travel by taking velocity measurements as the car decelerates. 1. Approximately, how far did the car travel in the first 5 seconds? Explain how you got your answer. 2. Using the data provided, approximate the total distance traveled by the car after it runs out of gas. With your study team, decide the most accurate way to determine the distance traveled. 3. Did the car reach the gas station before stopping? If not, how far did Elena and J. T. have to walk? Part II. After arriving at Calculus Camp, J. T. and Elena realized that they could have made a much better estimate of the distance traveled after running out of gas than they had in part I. Elena suggested using a function to approximate the data, thereby allowing them to use a Riemann sum.
30 citations