Molybdenum Sulfide/carbide Catalysts
Title | Molybdenum Sulfide/carbide Catalysts PDF eBook |
Author | |
Publisher | |
Pages | |
Release | 2007 |
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The present invention provides methods of synthesizing molybdenum disulfide (MoS.sub. 2) and carbon-containing molybdenum disulfide (MoS.sub. 2-xC.sub.x) catalysts that exhibit improved catalytic activity for hydrotreating reactions involving hydrodesulfurization, hydrodenitrogenation, and hydrogenation. The present invention also concerns the resulting catalysts. Furthermore, the invention concerns the promotion of these catalysts with Co, Ni, Fe, and/or Ru sulfides to create catalysts with greater activity, for hydrotreating reactions, than conventional catalysts such as cobalt molybdate on alumina support.
Molybdenum Carbide Catalysts
Title | Molybdenum Carbide Catalysts PDF eBook |
Author | Jae Sung Lee |
Publisher | |
Pages | 520 |
Release | 1984 |
Genre | Catalysts |
ISBN |
Studies of Molybdenum Carbide Catalysts
Title | Studies of Molybdenum Carbide Catalysts PDF eBook |
Author | Gurdeep Singh Ranhotra |
Publisher | |
Pages | 268 |
Release | 1986 |
Genre | |
ISBN |
Synthesis, Characterization, and Activity of Molybdenum Carbide Catalysts
Title | Synthesis, Characterization, and Activity of Molybdenum Carbide Catalysts PDF eBook |
Author | Michael Kraft Neylon |
Publisher | |
Pages | |
Release | 1999 |
Genre | |
ISBN | 9780599634268 |
The Structure and Function of Supported Molybdenum Nitride and Molybdenum Carbide Hydrotreating Catalysts
Title | The Structure and Function of Supported Molybdenum Nitride and Molybdenum Carbide Hydrotreating Catalysts PDF eBook |
Author | Gregory Martin Dolce |
Publisher | |
Pages | 360 |
Release | 1997 |
Genre | Catalysts |
ISBN |
The Feasibility of Mo2C Catalysts for the Reforming of Sulfur-Laden Transportation Fuels
Title | The Feasibility of Mo2C Catalysts for the Reforming of Sulfur-Laden Transportation Fuels PDF eBook |
Author | |
Publisher | |
Pages | 16 |
Release | 2006 |
Genre | |
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The objective of this project is to investigate the feasibility of using molybdenum carbide catalysts for the reforming of transportation fuels (gasoline and diesel) in the presence of sulfur. Using trimethyl pentane (TMP) and hexadecane (HD) as model fuels and thiophene and benzothiophene as model sulfur compounds, all of the original objectives of the project were successfully accomplished. We have found that the steam reforming (SR) of sulfur-free TMP can be carried out over bulk Mo2C catalysts at essentially stoichiometric feed conditions without coking, as long as the temperatures are at about 1000 C. However, the stable operating temperature can be lowered to 900 C, by adding molecular oxygen (oxidative-steam reforming (OSR)). The activity of a bulk molybdenum carbide catalyst for the steam (SR) of sulfur free hexadecane was found to be stable under very low steam:carbon ratios at temperatures as low as 885 degrees C under OSR conditions, and at 965 degrees C under SR conditions. For both TMP and HD, the degree of deactivation in the presence of sulfur was dependent on the sulfur concentration but was minimal at concentrations below 100 ppmw. While deactivation was completely reversible in the case of TMP steam reforming, spent catalysts from OSR could only be partially reactivated. However, sulfur poisoning was totally reversible for HD under both SR and OSR conditions.
The Effects of Sulfur and Oxygen on the Catalytic Activity of Molybdenum Carbide During Dry Methane Reforming
Title | The Effects of Sulfur and Oxygen on the Catalytic Activity of Molybdenum Carbide During Dry Methane Reforming PDF eBook |
Author | Meredith Lynn Pritchard |
Publisher | |
Pages | 130 |
Release | 2004 |
Genre | Catalytic reforming |
ISBN |