Exhaust treatment and filtration system for molten carbonate fuel cells

A filter system for adsorbing contaminants from an exhaust system from a molten carbonate fuel cell prior to passage of the exhaust stream through an oxidation catalyst comprising

• a filter substrate,
• a high surface area inorganic adsorbent secured to the filter substrate by an inorganic binder, and
• an inorganic acidic material coated onto the filter substrate.

A process for preparing a filter system for filtering exhaust gases from a molten carbonate fuel cell prior to passage through an oxidation catalyst comprising

• preparing a filter substrate,
• coating the filter substrate with an inorganic adsorbent by use of an inorganic binder, and
• treating the coated filter substrate with an acidic material.

A process for preparing a filter system for filtering exhaust gases from a molten carbonate fuel cell comprising preparing a filter substrate and coating the filter substrate with a blend of an inorganic adsorbent, an inorganic binder and an acidic material.

A process for filtering contaminants which are present in an exhaust stream of a molten carbonate fuel cell comprising

• passing a fuel stream through the molten carbonate fuel cell,
• passing at least a portion of an exhaust stream containing inorganic contaminants through a filter system, and
• filtering the inorganic contaminants from the exhaust stream by use of the filter system, wherein the filter system comprises a filter substrate, an inorganic adsorbent secured to the filter substrate by an inorganic binder and an acidic material coated onto the filter substrate.

The process of claim 18 further comprising passing at least a portion of the filtered exhaust stream after passage through the filter system through an oxidation catalyst system.