By T.P. Nelson
This booklet describes substitute formulations and packaging strategies for the relief or removal of chlorofluorocarbon (CFC) use as an aerosol propellant. Use of CFCs in particular different types of aerosols thought of "nonessential" used to be banned via the U.S. in 1978. fresh renewed curiosity in extra lowering all over the world construction and intake of CFCs, and different chemical substances implicated within the depletion of the earth's stratospheric ozone layer, is liable for this learn, which covers at the moment exempted and excluded CFC aerosol purposes and their possible choices.
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Extra resources for Alternative Formulations and Packaging to Reduce use of Chlorofluorocarbons
A recommended compromise is the use of two to 10 Handbook of air pollution analvsis four statistically random sites for simultaneous measurement and corresponding caution in determining statistical confidence in the results. Sampling site selection is the next major step in conjunction with classifying the nature of the source emission. e. at the pollution control device, for device efficiency testing) (c) Availability of a platform for men and equipment (d) Accessibility of the platform to the men and equipment (e) Access to the stack interior from a suitable port (f) Provision of power supply for sampling equipment, and (g) Satisfaction of flow disturbance criteria.
Variable catalytic conversion of N0 2 and S02 was believed responsible. Roberts and Friedlander [91J have reported a filter treatment consisting of soaking in dilute HCl, washing excess acid with distilled water and firing at 3500 C, which made glass fibre filters inert to reaction with S02' Neutral quartz filters treated with phosphoric or hydrochloric acid and fired at 7500 C have been shown to be inert in the sampling of acidic sulphates [96, 97]. During sampling, collected particles may react mutually or with ambient gaseous pollutants.
Sansone  studied sampling for particulates following a 90° bend. As would be expected, the particulate concentration was found to be higher at the wall further from the centre of curvature of the bend. It was also found that, under turbulent flow conditions, particle concentrations were higher around the periphery of the flow duct. General sampling techniques 29 ~ "6 Co "4 1-2 0-6 0-8 ,,0 / / / / / / / / // / / /' 1-2 1-4 16 "8 Uo U 0-8 0-6 KEY C Concentration Sampled Co True Concentration U Uo Sampling Speed Wind Speed Fig.
Alternative Formulations and Packaging to Reduce use of Chlorofluorocarbons by T.P. Nelson