Cetane improvement of diesel with a novel bimetallic catalyst

Tuning cis-decalin Selectivity in Naphthalene Hydrogenation Over Carbon-supported Rhodium Catalyst Under Supercritical Carbon dioxide

“…Vapor and liquid phase hydrogenation of naphthalene over supported metal catalysts has been investigated by several researchers [9][10][11][12][13][14]. However, high temperature (>473 K) and acidic nature of catalyst supports used in the dearomatization form hydrocracking byproducts and high molecular weight products that cause the decrease in the yield of cyclic saturated hydrocarbons in vapor phase reaction [9,10,14].…”

Structure and Size of Bimetallic Palladium-Platinum Clusters in an Hydrotreatment

“…Many patents and articles claim that PdPt supported bimetallic catalysts are more thio-tolerant than pure metals [13] particularly for a selected range of Pd/Pt ratio [14][15][16][17]. Regarding academic studies, several studies have been already dedicated to the structure at the atomic scale of this bimetallic catalyst [18][19][20][21][22].…”

Pd/Pt on Ti-containing Mixed Oxides as Dearomatization Catalysts: Physico-chemical Characterization and Activity

“…On decreasing the H 2 /THN molar ratio, the yield in HMW compounds further decreases, while the losses in the C balance increase by more than 20%, confirming the requirement for a large H 2 excess [12][13][14][15]18,34]. Although THN conversion reaches maximum for a molar ratio equal to 12.0, the losses in the C losses increased by decreasing the excess H 2 , with minimum value together with the highest yield in DeHN for the H 2 /THN=15.0 molar ratio.…”

“…Since noble metal catalysts are easily poisoned by small amounts of S-containing compounds, the HDS catalyst in the first-stage reactor has to reduce the S-level up to a few wt ppm. Enhanced activity and thio-tolerance have been claimed for the Pd/Pt couple on several supports [15,16].…”

“…In recent years, noble metals have been widely investigated [12][13][14] as active phases for hydrotreating catalysts, since only a two-stage hydrotreating process, using noble metals catalyst in the second stage, can achieve deep levels of aromatic hydrogenation under mild operating conditions (i.e., moderate H 2 pressure and low temperature). Since noble metal catalysts are easily poisoned by small amounts of S-containing compounds, the HDS catalyst in the first-stage reactor has to reduce the S-level up to a few wt ppm.…”