Innerliner wrap for smoking articles

A smoking article comprising a tobacco filler, an innerliner wrap encasing said filler, and an outer wrap over said innerliner wrap, said innerliner wrap comprising a combustible porous paper sheet of cellulosic fibers and finely pulverized activated carbon particles combined intimately with a precipitate of calcium citrate, said carbon particles having a porous surface whereby said calcium citrate is located into and onto said carbon particles to coat both the inner and outer surfaces.

The method for forming a porous paper sheet for use as a combustible innerliner wrap for a tobacco smoking article comprising suspending carbon in the form of finely pulverized, activated particles particles in a solution including a calcium salt, providing a solution including a citrate salt, mixing and stirring said suspension and solution whereby calcium citrate precipitates into and onto said carbon particles to coat both the inner and outer surfaces, mixing said coated carbon in a slurry of cellulosic fiber, and forming said porous paper sheet.