However, instead of being exhausted to the atmosphere, according to the invention, {HEAD ~ this gaseous stream} is provided to {TAIL ~ a reaction chamber}, such as, for example, a pyrolysis chamber 
is provided to
However , instead of being exhausted to the atmosphere , according to the invention , { HEAD ~ this gaseous stream } is provided to { TAIL ~ a reaction chamber } , such as , for example , a pyrolysis chamber
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH