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Properties of coarse particles in the atmosphere of the United Kingdom
Atmospheric Environment, 2011Abstract The recent rapid expansion of PM2.5 monitoring alongside PM10 has allowed estimation of concentrations of coarse particles (PM2.5–10) by difference. This has been carried out for sites using comparable measurement techniques for both metrics, and the properties of the hourly average concentration data have been evaluated.
Yan-Ju Liu, Roy M. Harrison
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Gas-phase mercury in the atmosphere of the United Kingdom
Atmospheric Environment, 1998Abstract Measurements of total gaseous mercury have been made over a period of 1 yr using a cold vapour atomic fluorescence absorption technique at Harwell, a rural site in central southern England. The mean concentration was 1.68 ng m−3, with a maximum hourly mean concentration of 20.5 ng m−3 and a minimum hourly mean concentration of 0.26 ng m−3 ...
G. J. Dollard +2 more
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A Report on the Calibration of an Atmospheric and Vacuum Distillation Unit
Petroleum Science and Technology, 2013For a crude oil distillation unit of 5 million tons/year (595.2 t/h), its calibration of heavy load was done in the paper. The yields of atmospheric gas oil and total distillate oil can reach 24.69% and 69.53%, respectively, close to their design values, and comprehensive energy consumption of the unit was 341.38 MJ/t, less than its design value, which
W. Li, J. Liu
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Trends in atmospheric reactive nitrogen for the Eastern United States
Environmental Pollution, 2011Reactive nitrogen can travel far from emission sources and impact sensitive ecosystems. From 2002 to 2006, policy actions have led to decreases in NO(x) emissions from power plants and motor vehicles. In this study, atmospheric chemical transport modeling demonstrates that these emissions reductions have led to a downward trend in ambient measurements ...
Robin L. Dennis +2 more
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Variations of atmospheric temperature with altitude in the United States
Electrical Engineering, 1941It has long been recognized that with increase in altitude the density of air decreases and influences the voltage rating and temperature rise of electrical apparatus. However, different standards for apparatus do not give the same weight to these factors.
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Problems in automatic control of atmospheric-vacuum units
Chemistry and Technology of Fuels and Oils, 1994Of all the sections in AVT [atmospheric-vacuum tubestill] units, the distillation towers are the most difficult to control; this is particularly true in units operating to produce lube stocks. In the atmospheric towers, three or four side streams are usually taken as end-products with specified properties; in the vacuum towers, two or three sides ...
A. P. Verevkin, Yu. M. Munirov
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ON THE DESIGN FLEXIBILITY OF ATMOSPHERIC CRUDE FRACTIONATION UNITS
Chemical Engineering Communications, 1998Abstract This paper is devoted to study the effect of the design parameters on atmospheric crude distillation units. The following conclusions are obtained: Pump-around circuits play only a role in energy integration, but they have imperceptible effects on the separation goals.
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Natural sulfur emissions to the atmosphere of the continental United States
Global Biogeochemical Cycles, 1992Seasonal emissions of biogenic sulfur gases from marine and terrestrial sources were assessed for 13 regions of the continental United States. The resulting inventory was compared to volcanic and anthropogenic sulfur emissions from the same regions. Terrestrial biogenic sulfur emissions were less than 1% of the total sulfur emissions in each region ...
Brian Lamb, Timothy S. Bates
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Suggested Units for Quantities Related to Visibility in the Atmosphere
Journal of the Air Pollution Control Association, 1984When interpreting data for the scattering, absorption, or extinction of light in the atmosphere by aerosols, it is often useful to report data for the effectiveness of the aerosol in causing these phenomena. Depending on whether the mass or volume concentration of the aerosol is known, this can be done by reporting values for the cross section per unit
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Receiver unit for a channel with turbulent atmosphere [PDF]
Measurement Techniques, 1982 V. P. Klimashin, S. E. Sebko
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