摘要:
The present invention pertains to a process for carrying out a high-speed stop in a Fischer-Tropsch process which comprises providing a feed to a fixed bed reactor comprising a Fischer-Tropsch catalyst, the reactor being at reaction temperature and pressure, and withdrawing an effluent from the reactor, wherein the high-speed stop is effected by blocking provision of feed to the reactor and simultaneously blocking the withdrawal of effluent from the reactor.
摘要:
A process for carrying out a high-speed stop in a Fischer-Tropsch process which comprises providing a feed comprising CO and H2 to a fixed bed reactor comprising a Fischer-Tropsch catalyst, the reactor being at reaction temperature and pressure, the gaseous hourly space velocity in the reactor being in the range from 500 to 10000 Nl/l/h, and withdrawing an effluent from the reactor, wherein the high-speed stop is effected by blocking provision of H2 to the reactor while providingCO to the reactor, and withdrawing gaseous reactor content from the reactor, and wherein during the high-speed stop CO is added in an amount of 5-80 Nl/l/h.
摘要翻译:一种在费 - 托方法中进行高速停止的方法,其包括向包含费 - 托催化剂的固定床反应器提供包含CO和H 2的进料,反应器处于反应温度和压力下,气时空间 反应器中的速度在500至10000Nl / l / h的范围内,并且从反应器中排出流出物,其中高速停止通过在向反应器提供CO的同时阻止向反应器中提供H 2而进行,以及 从反应器中取出气态反应器内容物,其中在高速停止期间,以5-80Nl / l / h的量加入CO。
摘要:
The present invention provides a catalyst for producing alcohols from carboxylic acids by hydrogenation, containing Co metal as an essential component and one or more elements selected from Zr, Y, La, Ce, Si, Al, Sc, V and Mo as a first co-catalyst component, and having 20% or more of cubic phase in the crystal phase of the Co metal, the method for producing the catalyst, and the method for producing an alcohol from a carboxylic acid as a raw material by hydrogenation using the catalyst.
摘要:
A process for the preparation of a catalyst or catalyst precursor, comprising the steps of: (a) admixing: (i) a catalytically active metal or metal compound (ii) a carrier material (iii) a gluing agent; and (iv) optionally one or more promoters, and/or one or more co-catalysts; (b) forming the mixture of step (a); and (c) drying the product of step (b) for more than 5 hours at a temperature up to 100 C to form the catalyst or catalyst precursor. The catalyst material mixture does not need to be calcined after forming to achieve the required minimum strength for use in a suitable reaction, such as Fischer Tropsch.
摘要:
Method for producing a multifunctional material includes thermally treating a substrate having a surface layer formed of titanium, titanium oxide, a titanium alloy, or a titanium alloy oxide so that the temperature of the surface layer is raised to 600° C. or higher, to thereby provide, in the interior of the surface layer, a second layer formed of forest microcolumns of titanium oxide or a titanium alloy oxide; and subsequently cutting the second layer in parallel with the surface layer, to yield a material including the substrate and a layer formed of titanium-oxide- or titanium-alloy-oxide-formed forest microcolumns exposed on at least a portion of the substrate, as well as a material including a thin film, numerous continuous small-width with protrusions thereon, and forest microcolumns formed on the protrusions.
摘要:
In one aspect, the invention provides a catalyst for the production of synthesis gas, the catalyst comprising a) from about 0.1 to about 1.3% by weight of nickel that is supported on modified support, and b) a promoting agent. The catalyst can also comprise a dispersing agent. In another aspect, the invention provides a process for preparing the catalyst above, and a process for the catalytic partial oxidation of methane using the same catalyst.
摘要:
A process for preparing a shell metal catalyst or a precursor of a shell metal catalyst which process includes the steps of: applying a slurry having a diluent; a catalytically active metal or a precursor compound thereof; and optionally a refractory oxide; designated hereinafter as “first refractory oxide” of an element having an atomic number of at least 20 or a precursor of the first refractory oxide; onto the surface of particles of a core carrier; forming a wet coating; and removing at least a part of the diluent from the wet coating; wherein the slurry has at least 5% w of the catalytically active metal or the precursor compound thereof; calculated on the weight of the metal relative to the weight of calcinations residue which can be formed from the slurry by drying the slurry and calcining. The invention also relates to a shell metal catalyst or a precursor of a shell metal catalyst which is obtainable by the process; and the use of the shell metal catalyst in a chemical conversion process. The invention also relates to a process for producing hydrocarbons; which process involves contacting a mixture of carbon monoxide and hydrogen with a shell metal catalyst, wherein the catalytically active metal is a Group VIII metal which is present at least partly in metallic form.
摘要:
A plasma assisted reactor for the removal of carbonaceous combustion products or for simultaneous removal of carbonaceous products and nitrogen oxides from the exhaust emissions from an internal combustion engine, wherein the reactor includes a gas permeable bed made at least primarily of active materials comprising perovskite or vanadate.
摘要:
The present invention relates to a process for preparing nicotinic acid, which comprises directly subjecting a mixture of 3-methylpyridine, oxygen, and water to a vapor phase oxidation in the presence of a catalyst consisting of, as active ingredients, vanadium oxide (V2O5) and transition metal oxide both of which are supported on a carrier, to give the nicotinic acid, wherein crystal size of the active ingredients on the surface of the carrier is controlled in a range of from 40 to 200 nm through use of transition metal oxide. The present invention further relates to a catalyst used in the oxidation. In the method according to the present invention, the nicotinic acid can be obtained in a higher conversion and a higher selectivity. Therefore, the manufacturing cost can be reduced.
摘要:
Vanadium antimony oxide catalysts useful for the selective oxidation and ammoxidation of paraffins, olefins, and aromatic compounds are manufactured in a process comprising (i) forming a catalyst precursor slurry comprising a vanadium containing compound and an antimony containing compound in a liquid solvent medium which comprises an organic solvent, and (ii) recovering a vanadium antimony oxide from the slurry by drying the slurry in order to remove water and organic solvent.