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CFCS are saturated hydrocarbons ( Hydrocarbons) The halogen derivative

by:Arkool     2020-03-10
< p > the definition of freon, freon is saturated hydrocarbons ( Hydrocarbons) The floorboard of the halogen derivative, as in the 30 s of this century, with the development of chemical industry and the type of refrigerant, it solved the refrigeration KongDiaoJie seeking of refrigerants. Can be seen from the definition of freon, now what is called the non freon R134a has a, R410A and R407C are freon. < / p > < p > freon can destroy ozone because there is the existence of CL element in refrigerants, and along with the increase of the CL atom number of ozone depletion ability increase, with the increase of H element content of ozone depletion ability; The greenhouse effect is mainly due to the refrigerant in the process of slow oxidation decomposition, generate large amounts of greenhouse gases, such as CO2, etc. According to the molecular structure of the freon refrigerant, which can be roughly divided into the following three categories: < / p > < p > 1. CFCS < / p > < p > or CFC, mainly including the R11, R12, R113? , R115, R500, R114, due to the destruction of the ozone layer and is the largest, has been the Montreal protocol as a kind of controlled substances. Such material is currently bans the use, in the process of manufacture of polyurethane sponge, R11 by R141b as transitional substitutes. < / p > < p > 2。 Hydrogen CFCS < / p > < p > as for short, mainly including R22, R123, R141b and R142b, ozone depletion coefficient is only a few percent of R11, therefore, at present as kind substance is regarded as CFC type of the most important transitional alternative material. R22 were limited in the Montreal protocol in 2020, R123 are limited in 2030, developing countries can postpone for 10 years. < / p > < p > 3。 Hydrogen fluoride hydrocarbon < / p > < p > referred to as 'HFC, mainly includes everything, R125, R32, R407C, R410A, R152, ozone depletion coefficient is 0, but warming ozeme depletion potential is very high. In the Montreal protocol has not stipulated the use period, in the United Nations framework convention on climate change as a greenhouse gas in the Kyoto protocol. < / p > < p > we are using all of the refrigerants are all freon products, non freon refrigerant so far has not yet been developed. Before the new refrigerant developed, we have to solve is air conditioning unit to choose that kind of refrigerant, for our survival environment of damage is relatively small. We should should be banned in the first class products, rather than class 2, class 3 refrigerants. < / p > < p > < / p >
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