Production of ultrapure hydrogen in a Pd-Ag membrane reactor using Ru/La2O3 Catalysts

B. FAROLDI, C. CARRARA, E. A. LOMBARDO, L. CORNAGLIA

Natal, Brasil

Congreso; 8th Natural Gas Conversion Symposium; 2007

Catalytic dry reforming is the reaction of  carbon  dioxide  with  methane  to  produce syngas.  If the main goal is to  produce H2, this reaction  can be carried out  in two different ways: in a fixed-bed  reactor followed by the purification steps, or in a  membrane reactor combining the  reaction  and the purification in a single vessel. In the latter option, the system offers the possibility of overcoming the thermodynamic limitations of this endothermic reaction, allowing the attainment of higher methane conversions at  lower temperatures. Dense Pd/Ag membranes exhibit almost 100%  selectivity towards hydrogen, so that ultrapure hydrogen could be produced.