Patent ID: 6997118

Claim:
A system for producing a gas stream having fuel or heat value comprising: a fluid channel including a first stage section and a second stage section, the fluid channel including a U-shaped section that transitions the first stage section to the second stage section; a pulse combustion device in communication with the first stage section of the fluid channel, the pulse combustion device comprising a pulse combustor coupled to at least one resonance tube, the pulse combustion device being configured to combust a solid or liquid fuel and create a pulsating combustion stream and an acoustic pressure wave, the fluid channel being shaped to transmit the acoustic pressure wave from the first stage section to the second stage section; a sulfur capturing agent injection port for injecting a sulfur capturing agent into the second stage section of the fluid channel, the sulfur capturing agent being configured to remove sulfur-containing gases from the pulsating combustion stream and to undergo acoustic agglomeration with any particles contained in the pulsating combustion stream; a particulate removal device in communication with the fluid channel for receiving the combustion stream and removing particulates contained in the stream; and wherein the fluid channel in conjunction with the pulse combustion device are configured such that the first stage section of the fluid channel operates at a first exit temperature and the second stage section operates at a second exit temperature, the first exit temperature being greater than the second exit temperature, the second exit temperature being less than about 1900° F.