Collect. Czech. Chem. Commun. 1992, 57, 836-844

Characterization of Mo-Containing Systems Supported on AlPO4-5 and Aluminium Phosphate and Their Behavior in Thiophene Conversion

Alla A. Spojakina, Nina G. Kostova and Ljubomir Dimitrov

Institute of Kinetics and Catalysis, Bulgarian Academy of Science, 1113 Sofia, Bulgaria


The properties of AlPO4-5 with zeolite-like structure and amorphous aluminium phosphate modified by nickel and/or molybdenum (1 wt.% and 10 wt.%, respectively) have been studied using ESR and IR spectroscopy and catalytic testing in hydrodesulfurization (HDS) of thiophene. The chemical interaction between all components of catalysts with formation of polymolybdate structures is revealed. The impact of the support is reflected in the difference of composition of polymolybdates, and different interactions with the hydrogen sulfide eliminated in thiophene conversion. The selectivity of the thiophene conversion and adsorption of H2S eliminated depend on the method of introduction of components only for AlPO4-5.