Method for filtering benzo-a-pyrene from a gas stream

摘要

The present invention relates to a method of filtering, at the end user's home, business or the like, a gas stream in which benzo-a- pyrene has been concentrated at sufficient levels to be a significant health hazard. Steps of the invention include:PP(a) introducing the natural gas stream to a filter selected from a group that includes at least activated charcoal and impingement adsorbing media whereby benzo-a- pyrene concentrated in the gas stream at sufficient levels to be a health threat by aperiodic loading of such network in which benzo-a-pyrene become clumped into packets due to dampening effects of the compressor- driven equipment and multiple customer outlet usage coupled with surprising longivity of the in situ benzo-a-pyrene, is filtered from the gas stream and captured irrespective of mode of transport,P P(b) passing the filtered natural gas stream to the customer's gas appliance wherein safe use of the energy associated with the stream occurs,PP(c) periodically and safely removing the filter of step (a) for disposing of captured benzo-a-pyrene, PP(d) inserting a new filter in place of the removed filter of step (c).