I found the following on my laptop three weeks after I got home, probably
written in the Tokyo airport during my "extra" Saturday, courtesy of the
dateline.. If I sent it before, please excuse!
On my trip I saw a monstrous pressurized recirculating fluidized bed combustor
in Finland. It was impressive as a major engineering feat. One justification
is that the hot gas filtering with ceramic candles are relatively cheaper at
high pressure. However, the cost of the equipment is very high for combustion.