Patent ID: 8283386

Claim:
A method of operating a two-phase fluidised bed reactor, the method including feeding at a low level at least one gaseous reactant into a vertically extending fluidised body of solid particles, the fluidised body being contained in at least two vertically extending shafts housed side by side within a common reactor shell, each shaft being divided into a plurality of vertically extending channels at least some of which are in flow communication and the fluidised body being present in at least some of the channels, and at least some of the shafts and/or channels being at least partially defined by heat exchange surfaces; allowing the gaseous reactant to react as it passes upwardly through the fluidised body present in at least some of the channels of the shafts, thereby to form a gaseous product; allowing gaseous product and/or unreacted gaseous reactant to disengage from the fluidised body in a head space above the fluidised body; and withdrawing gaseous product and unreacted gaseous reactant, if present, from the head space.