A diesel fuel processor for stable operation of solid oxide fuel cells system: II. Integrated diesel fuel processor for the operation of solid oxide fuel cells

Post-reforming experimental results for the complete removal of light hydrocarbons from diesel reformate are introduced in part I. In part II of the paper, an integrated diesel fuel processor is investigated for the stable operation of SOFCs. Several post-reforming processors have been operated to suppress both sulfur poisoning and carbon deposition on the anode catalyst. The integrated diesel fuel processor is composed of an autothermal reformer, a desulfurizer, and a post-reformer. The autothermal reforming section in the integrated diesel fuel processor effectively decomposes aromatics, and converts fuel into H2-rich syngas. The subsequent desulfurizer removes sulfur-containing compounds present in the diesel reformate. Finally, the post-reformer completely removes the light hydrocarbons, which are carbon precursors, in the diesel reformate. We successfully operate the diesel reformer, desulfurizer, and post-reformer as microreactors for about 2500h in an integrated mode. The degradation rate of the overall reforming performance is negligible for the 2000h, and light hydrocarbons and sulfur-containing compounds are completely removed from the diesel reformate. ► Diesel autothermal reformate contains the residual low hydrocarbons and sulfur compounds. ► The residual low hydrocarbons and sulfur compounds degrades the SOFC anode. ► The introduced fuel processor is composed of ATR, desulfurizer, and post-reforming. ► The introduced fuel processor was operated for 2500h. ► The fuel processor completely removed the low hydrocarbons and sulfur compounds.