摘要:
The invention provides a catalyst including a support, at least one noble metal from group VIII of the periodic table, silicon as a dopant, optionally boron, optionally at least one group VIB element, optionally phosphorous and optionally at least one halogen. The invention also provides a particular preparation of the catalyst. The invention also concerns the use of this catalyst in the hydrotreatment of hydrocarbon-containing feeds, more particularly its use for hydrogenating aromatic compounds in a gas oil cut.
摘要:
A process for activation of a hydroconversion catalyst, whereby said catalyst contains at least one metal or element of group VIII, at least one acid element and optionally at least one metal or element of group VI according to which a light petroleum fraction, at least one thionic compound and at least one nitrogenous compound are injected in said catalyst. This process is carried out such that the QS sulfur amount that is injected before the temperature of the catalyst reaches 250° C. is at least equal to half the QSO sulfur amount that is necessary for complete sulfurization of the catalyst.
摘要:
The invention relates to a device for dispensing a liquid additive into a fuel circulation circuit (2) for an internal combustion engine, in particular for an engine equipping a vehicle, said device comprising: a tank (26) containing the additive, an enclosure (24) communicating with the fuel circulation circuit (2) and inside which the tank (26) containing the additive is inserted, means for injecting additive connected to the tank (26) and the fuel circulation circuit (2) and making it possible to dispense the additive in the fuel circulation circuit (2), and control means for controlling the injection means.
摘要:
A composition contains an additive for assisting with regeneration of the PF in the form of an organic dispersion of iron particles in crystallized form and a detergent including a quaternary ammonium salt.
摘要:
Thermally stable, solid alumina-based compositions useful for the trapping of nitrogen oxides that are contained in gaseous fluids, notably in vehicular exhaust gases, are formed of alumina, cerium and a divalent metal M selected from among barium, strontium or an association of these two elements and which include at least 10% of the weight of element M expressed by weight of oxide in contrast to the total weight of the composition and also wherein the aluminate compound of the metal element M, i.e., MAl2O4, is absent and not detectable by X-ray diffraction of the composition, after calcination thereof with air at 700° C. for two hours.
摘要翻译:用于捕获气态流体(特别是车辆废气)中的氮氧化物的热稳定的固体氧化铝基组合物由氧化铝,铈和选自钡,锶或这些缔合物的二价金属M形成 两个元素,并且其包括与组合物的总重量相反的元素M的重量的至少10重量%,并且还包括金属元素M的铝酸盐化合物即MAI 2 O 4,并且不可检测 通过组合物的X射线衍射,在700℃下用空气煅烧2小时。
摘要:
The invention relates to a device for dispensing a liquid additive into a fuel circulation circuit (2) for an internal combustion engine, in particular for an engine equipping a vehicle, said device comprising:a tank (26) containing the additive,an enclosure (24) communicating with the fuel circulation circuit (2) and inside which the tank (26) containing the additive is inserted,means for injecting additive connected to the tank (26) and the fuel circulation circuit (2) and making it possible to dispense the additive in the fuel circulation circuit (2), andcontrol means for controlling the injection means.
摘要:
A method for processing a CO2-containing gas in order to reduce the carbon dioxide content thereof, includes contacting the gas with a compound of at least one rare earth element, whereby the carbon dioxide is adsorbed onto the compound and a carbon dioxide-depleted gas is thus obtained; such compound is more particularly an oxide, and the rare earth element is particularly selected from among cerium, lanthanum or praseodymium.
摘要:
The invention relates to a process for conversion of hydrocarbons in the presence of at least one catalyst with controlled acidity, characterized in that the level of activity of said catalyst in isomerization of the cyclohexane is less than 0.10 and/or in that the ratio of toluene hydrogenation activity to the cyclohexane isomerization activity is greater than 10.
摘要:
The present invention relates to a catalyst comprising an extruded essentially alumina-based support, constituted by a plurality of juxtaposed agglomerates partially in the form of packs of flakes and partially in the form of needles, and comprising at least one catalytic metal or a compound of a catalytic metal from group VIB, and/or optionally at least one catalytic metal or compound of a catalytic metal from group VIII. The catalyst also comprises at least one dopant selected from the group formed by boron, phosphorous, silicon (or a silica different from that subsequently added to the support) and halogens. The invention also relates to its use in a fixed bed reactor, for hydrorefining and hydroconverting hydrocarbon feeds.