Further development of a microchannel steam reformer for diesel fuel

Abstract This paper presents results from the ongoing optimisation of a microchannel steam reformer for diesel fuel which is developed in the framework of the development of a PEM fuel cell system for vehicular applications. Four downscaled reformers with different catalytic coatings of precious metal were operated in order to identify the most favourable catalyst formulation. Diesel surrogate was processed at varying temperatures and steam to carbon ratios ( S / C ). The reformer performance was investigated considering hydrogen yield, reformate composition, fuel conversion, and deactivation from carbon formation. Complete fuel conversion is obtained with several catalysts. One catalyst in particular is less susceptible to carbon formation and shows a high selectivity. To optimise the reformer geometry, a fifth downscaled reformer was implemented with an increased channel height. In operation the reformer shows advantages in performance and pressure losses in comparison to the original geometry.

[1]  B. Tuinstra,et al.  Diesel fuel processing for fuel cells : DESIRE , 2006 .

[2]  Gunther Kolb,et al.  Fuel Processing: For Fuel Cells , 2008 .

[3]  Peter Pfeifer,et al.  Reforming of diesel fuel in a micro reactor for APU systems , 2008 .

[4]  R. C. Samsun,et al.  Autothermal reforming of commercial Jet A-1 on a 5kWe scale , 2007 .

[5]  Gunther Kolb,et al.  Development and evaluation of a microreactor for the reforming of diesel fuel in the kW range , 2009 .

[6]  R. Reimert,et al.  Noble metal catalysts supported on gadolinium doped ceria used for natural gas reforming in fuel cell applications , 2007 .

[7]  Vito Specchia,et al.  Diesel fuel processor for PEM fuel cells: Two possible alternatives (ATR versus SR) , 2006 .

[8]  Klaus Lucka,et al.  Mixture preparation by cool flames for diesel-reforming technologies , 2003 .

[9]  Chunshan Song,et al.  Sulfur poisoning of CeO2–Al2O3-supported mono- and bi-metallic Ni and Rh catalysts in steam reforming of liquid hydrocarbons at low and high temperatures , 2010 .

[10]  Klaus Lucka,et al.  Diesel Steam Reforming for PEM Fuel Cells , 2008 .

[11]  Heinrich Köhne,et al.  Experimental and computational investigations of a compact steam reformer for fuel oil and diesel fuel , 2011 .

[12]  J. Thormann,et al.  Diesel-Dampfreformierung in Mikrostrukturreaktoren , 2009 .

[13]  G. Kolb,et al.  Microstructured reactors for diesel steam reforming, water-gas shift and preferential oxidation in the kiloWatt power range , 2009 .

[14]  K. Karan,et al.  Thermodynamic analysis of diesel reforming process: Mapping of carbon formation boundary and representative independent reactions , 2009 .

[15]  Jens R. Rostrup-Nielsen,et al.  Steam reforming of liquid hydrocarbons , 1998 .

[17]  A. Lindermeir,et al.  On-board diesel fuel processing for an SOFC–APU—Technical challenges for catalysis and reactor design , 2007 .

[18]  C. H. Bartholomew,et al.  Sulfur Poisoning of Metals , 1982 .