Bimetallic Catalysts for Isomerization of Alkanes (A Review)

Incorporating a second metal into the monometallic bifunctional catalyst structure results in appearance of new catalytic characteristics and increase in the catalytic productivity. This type of catalyst is called bimetallic catalyst, which is better than a monometallic one in industrial processes, because it enhances some catalytic features like metal dispersion, activity, selectivity, stability, and lifespan. Different researches have asserted that the bimetallic catalyst increases the yield of the desired branched alkanes and decreases the undesired low-molecular-weight gaseous products. The enhancement of catalytic properties of the bimetallic catalyst is ascribed mainly to the electronic features and geometric structure of nanoparticles of two metals and increases the Lewis acidity and balance between metals and a supporter. In this paper, the theoretical and experimental fundamentals of bimetallic catalysis are reviewed based on many trusted experimental works of different researchers.