Molybdenum Compounds

Abstract

Molybdenum, found naturally as molybdenite, is converted through MoO 3 to compounds in a wide range of oxidation states, coordination numbers, and states of aggregation. The diverse chemistry of molybdenum is manifest in a wide array of uses in biological and industrial systems. Molybdenum, an essential component of many enzymes, plays a primary role in nitrogen fixation and nitrate reduction in bacteria and plants, and sulfite and xanthine oxidation for microorganisms, plants, and animals. Industrially, molybdenum compounds are important in lubrication, where the disulfide and oil‐soluble molybdenum sulfur complexes serve as antifriction and antiwear agents; in hydrodesulfurization and hydrotreating of petroleum; ammoxidation and other catalytic processes; in anticorrosion formulations; as flame and smoke retardants; and in a variety of coatings and pigments. Biomedically, molybdenum is used in nuclear medicine and is under study in a number or therapeutic procedures. The trioxide, several molybdates, and the disulfide are available as bulk chemicals.

Theoretical Study of the Reactivity of Fe+ toward OCS

“…The chemistry of transition metal sulfur systems has attracted increasing attention due to their industrial and biological relevance . The industrial interest of transition metal sulfur species includes catalysis, corrosion, lubrication, battery technology, , etc. In many biological systems, it has been found that sulfur coordination is necessary for the functioning of numerous biological transition metal centers as a key part of its active site. , Nowadays, many transition metal sulfides have been utilized as enzymes and heterogeneous catalysts, where transition metal centers play an important role as potentially reactive sites and are capable of reacting with a large number of small molecules such as H 2 , C 2 H 6 , H 2 O, O 2 , SO 2 , and OCS.…”

Development of GREET Catalyst Module

“…Co(NO3)2 is produced by reacting CoO with nitric acid (Richardson, 2000), and the energy and material flow data for production of both CoO and nitric acid are available in GREET. Ammonium heptamolybdate is obtained by reacting ammonia solution with MoO3, while MoO3 is produced by calcining MoS2 ore (Stiefel, 2000). We describe the production of ammonium heptamolybdate also known as ammonium molybdate in a separate report (Benavides et al 2015).…”

Development of GREET Catalyst Module

“…Co(NO 3 ) 2 is produced by reacting CoO with nitric acid (Richardson, 2000), and the energy and material flow data for production of both CoO and nitric acid are available in GREET. Ammonium heptamolybdate is obtained by reacting ammonia solution with MoO 3 , while MoO 3 is produced by calcining MoS 2 ore (Stiefel, 2000). GREET does not include data specific to molybdenum compounds.…”