Patent ID: 8308847

Claim:
A filter for removing a sulfur-containing-gas, which removes the sulfur-containing-gas by being brought into contact with the sulfur-containing-gas in a gas flow path, the filter comprising a former filter disposed on an upstream side of the gas flow path, and a latter filter disposed on a downstream side of the gas flow path, wherein the former filter comprises a first material for removing a sulfur-containing-gas, the first material comprising a porous support, and iodine which is supported on the porous support, and is produced by catalytic pyrolysis of ammonium iodide at a thermal decomposition ratio of 80% or more by use of the porous support as a catalyst, and the latter filter comprises a second material for removing a sulfur-containing-gas, the second material comprising an activated carbon fiber, and an alkali component which is supported on the activated carbon fiber.