Chemical emission regulations, case

Case Studies on Chemical Flue Gas Treatment as a Means of Meeting Particulate Emission Regulations... 

The reasons for such strict regulation of air pollution are obvious protecting human health and the environment. Potential air pollutants are not only toxic in many cases, but they can travel over great distances, thereby impacting areas remote from the sources of emissions. There are two environments that are of concern, once chemicals are emitted to the surroundings ... 

The chemical and solvent processes previously discussed remove acid ga from the gas stream but result in a release of H2S and CO2 when the solvent is regenerated. The release of H2S to the atmosphere may be limited by environmental regulations. The acid gases could be routed to an incinerator or flare, w hich would convert the HiS to SO2. The allowable rate of SO2 release to the atmosphere may also be limited by environmental regulations. For example, currently the Texas Air Control Board generally limits H2S emissions to 4 Ib/hr (17.5 tons/year) and SO2 emissions to 25 tons/year. There are many specific restrictions on these limits, and the allowable limits are revised periodically. In any case, env ironmental regulations severely restrict the amount of H S that can be vented or flared in the regeneration cycle. 

This Act has been much amended and now forms a relevant statutory provision for the Health and Safety at Work, etc. Act 1974. Originally it provided for the registration and control of certain classes of chemical works. The Act has now been amended and the classes of premises, the scheduled works , are now included in the Health and Safety (Emission into Atmosphere) Regulations 1983 (amended 1989). There are 62 main categories of works, and in some cases only certain processes within a category are covered ... 

The relevant legislation for tanneries regarding the use of chemicals can be found both in legislation regarding environmental permits for the industrial installations which in some cases addresses substitution of chemicals. One example of this is the EU Industrial Emissions Directive [4] which regulates emissions from industrial installation within the EU. One key aspect in this directive is how problematic chemicals should be substituted to more environmentally friendly alternatives by tanneries. 

Obviously, acute or chronic toxicity is not an issue with the use of C02. Similarly, the ecological impact of carbon dioxide is negligible when used as a solvent, and C02 is—by definition—not regulated as a VOC. The application of C02 as a solvent in chemical synthesis would not generate any additional carbon dioxide and therefore would not contribute to greenhouse gas emission. Even for large-scale applications, no toxic or environmental risk would arise in case of any accidental contamination of the immediate environment with the solvent C02 if sufficient ventilation is provided. 

These two cases, and other examples could easily be mentioned from both land and air transport (e.g. operator working times), road traffic regulations, the environment (chemicals, soil emissions), construction and certification of airframes, emphasise consistent cultural traits that create differences between ways of regulating safety in different regions of Europe. 

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