2051-30-1Relevant articles and documents
The formation features of C10–C20 regular petroleum isoprenanes
Gordadze,Giruts,Poshibaeva,Koshelev
, p. 672 - 676 (2016/10/04)
To model the formation processes of C10–C20 petroleum isoprenanes, thermolysis of regular and irregular C20–C40 isoprenanes (phytane, crocetane, squalane, and lycopane) and the suggested precursors of regular pe
Catalytic Production of Branched Small Alkanes from Biohydrocarbons
Oya, Shin-Ichi,Kanno, Daisuke,Watanabe, Hideo,Tamura, Masazumi,Nakagawa, Yoshinao,Tomishige, Keiichi
, p. 2472 - 2475 (2015/08/24)
Squalane, C30 algae-derived branched hydrocarbon, was successfully converted to smaller hydrocarbons without skeletal isomerization and aromatization over ruthenium on ceria (Ru/CeO2). The internal CH2-CH2 bonds located between branches are preferably dissociated to give branched alkanes with very simple distribution as compared with conventional methods using metal-acid bifunctional catalysts.
High-performance ring-opening catalysts based on iridium-containing zeolite Beta in the hydroconversion of decalin
Santi, Dominic,Holl, Tobias,Calemma, Vincenzo,Weitkamp, Jens
, p. 46 - 57 (2013/06/04)
Decalin was converted in a flow-type reactor under a hydrogen pressure of 5.2 MPa on Ir/H,A-Beta zeolite catalysts, where A stands for an alkali metal cation. In one series of catalysts, the Ir content was 3 wt.%, and the nature of A was varied from lithi
Study on selectivity of β-myrcene hydrogenation in high-pressure carbon dioxide catalysed by noble metal catalysts
Bogel-Lukasik,Gomes Da Silva,Nogueira,Bogel-Lukasik,Nunes Da Ponte
experimental part, p. 1847 - 1856 (2011/03/19)
Hydrogenation of monoterpenes, such as β-myrcene, in high-density carbon dioxide over 0.5 wt.% Pd, or Rh, or Ru supported on alumina was investigated. Hydrogenation catalysed by Rh and Ru is generally faster in a single supercritical (sc) phase (gaseous reagents and solid catalyst) than in a biphasic system (liquid + gas reactants + solid catalyst). The reaction catalysed by Pd occurs faster in two phases. The final composition of the reaction mixture is strongly dependent on the noble metal catalyst used for the reaction. Palladium gives mainly 2,6-dimethyloctane (≈95%), rhodium produces 2,6-dimethyloctane with a yield higher than 40%, and around 40% of 2,6-dimethyloct-2-ene, while ruthenium gives around 10% of 2,6-dimethyloctane and 50% of 2,6-dimethyloct-2-ene leaving the highest amount of unreacted β-myrcene. The Pd catalyst is highly active with an excellent selectivity in enabling the one-pot synthesis of 2,6-dimethyloctane through β-myrcene hydrogenation in the presence of scCO2. The overall activity of the noble metal catalysts decreased in the order Pd > Rh > Ru. The problem of leaching of the active metal from the catalyst rod was also investigated. The Royal Society of Chemistry 2009.
Two-stage Reduction of Carbon Dioxide by Hydrogen in a Discharge and in the Presence of a Cobalt-Zirconium Catalyst Deposited on Kieselguhr
Eremin, E. N.,Rubstsova, E. A.,Ivanter, V. I.,Belova, V. M.
, p. 1722 - 1724 (2007/10/02)
The reduction of carbon dioxide by hydrogen has been investigated in a circulation system at a pressure of 1066 GPa, for discharge parameters of 1.9 kV and 150 mA, and at a temperature of 190 to 195 deg C in the catalytic reactor.The overall rate of the reaction was determined by the rate of its catalytic stage; for a contact time between the gas and the catalyst shorter than 3 s, the reaction is displaced towards the formation of paraffinic hydrocarbons.The qualitative and quantitative compositions of the liquid phase depended on its condensation conditions.At positive condensation temperatures, a condensate with relatively heavy components was obtained, up to 60-80percent of which consisted of C9H20-C12 H26 hydrocarbons.Their predominance in the condensate can be explained by secondary reactions on the catalyst involving relatively light saturated hydrocarbons.
