An aerosol-generating system is provided, including a nicotine source； a volatile delivery enhancing compound source, wherein a volatile delivery enhancing compound comprises an acid； and a heating means for heating one or both of the nicotine source and the volatile delivery enhancing compound source, wherein one or both of the nicotine source and the volatile delivery enhancing compound source is encapsulated in a cylindrical polymeric capsule, and the cylindrical polymeric capsule includes a thermally conductive material.
