The impact of sulphur poisoning during dry reforming (DR) of methane on a Rh/gamma-Al2O3 catalyst was studied by adding up to 30 ppmv of SO2 or H2S to the feed (CH4/CO2/N-2 = 1/1/2) at reaction temperatures in the range 800-900 degrees C. As low as 1 ppmv of sulphur in the feed adversely affected the H-2 and CO yield, and S-poisoning reached a saturation level for contents >= 10 ppmv, independently from the type of S-bearing compound. The impact of S addition on the RWGS reaction, occurring simultaneously to DR, was also investigated under steady state operation. Transient poisoning experiments showed a rapid drop of syn-gas production and a corresponding increase in the temperature level, suggesting that sulphur directly bonded to Rh active sites. An increase of coke formation on the catalyst was detected with respect to S-free conditions, and this effect was studied by Raman spectroscopy and thermogravimetric analysis. Sulphur inhibition was reversible and the Rh-catalyst slowly recovered its initial activity after the removal of sulphur from the feed. (C) 2015 Elsevier B.V. All rights reserved.