Abstract:
A catalyst composition comprises a self-bound zeolite and a Group 12 transition metal selected from the group consisting of Zn, Cd, or a combination thereof, the zeolite having a silicon to aluminum ratio of at least about 10, the catalyst composition having a micropore surface area of at least about 340 m2/g, a molar ratio of Group 12 transition metal to aluminum of about 0.1 to about 1.3, and at least one of: (a) a mesoporosity of greater than about 20 m2/g; (b) a diffusivity for 2,2-dimethylbutane of greater than about 1×10−2 sec−1 when measured at a temperature of about 120° C. and a 2,2-dimethylbutane pressure of about 60 torr (about 8 kPa).
Abstract:
Provided are a low-temperature SCR catalyst for denitrating diesel vehicle exhaust, and preparation method thereof. The catalyst uses a molecular sieve as a carrier, and uses metallic elements such as copper and iron as active components. The catalyst preparation method comprises: preprocessing the molecular sieve; conducting multiple equal-volume impreparations; after impreparation, drying to dehydrate, and calcining; and finally pulping and coating to prepare the catalyst. The catalyst employs base metals such as copper and iron instead of precious metals as active components, thus reducing costs, being harmless to humans, and being environmentally friendly. The preparation method of the catalyst is simple and feasible with low requirements for raw materials, employs a repeated but small-quantity method of equalvolume impregnation; and enables active ions to be dispersed more uniformly as compared with the existing conventional preparation methods, thus improving utilization and improving low-temperature catalytic activity and durability.
Abstract:
A process for vapor-phase carbonylation of methanol to methyl formate, whereby a feed gas containing methanol, carbon monoxide, hydrogen and oxygen is passed through a reactor loaded with a supported nano-scaled platinum group metal heterogeneous catalyst to produce methyl formate by a vapor-phase carbonylation reaction, under reaction conditions with a space velocity of 500-5000 h−1, a temperature of 50-150° C. and a pressure of 0.01-2 MPa. Supported nano-scaled platinum group metal heterogeneous catalysts are prepared via ultrasonic dispersion and calcination. Methyl formate is produced and isolated under relatively mild conditions.
Abstract:
A unique process and catalyst is described that operates efficiently for the direct production of a high cetane diesel type fuel or diesel type blending stock from stoichiometric mixtures of hydrogen and carbon monoxide. This invention allows for, but is not limited to, the economical and efficient production high quality diesel type fuels from small or distributed fuel production plants that have an annual production capacity of less than 10,000 barrels of product per day, by eliminating traditional wax upgrading processes. This catalytic process is ideal for distributed diesel fuel production plants such as gas to liquids production and other applications that require optimized economics based on supporting distributed feedstock resources.
Abstract:
A method for forming a catalyst can comprise: heating a Ge-ZSM-5 zeolite powder at a temperature of 400 to 600C; ion-exchanging the heat-treated zeolite powder with an alkali metal and impregnating the heat-treated zeolite powder with noble metal; heating the ion-exchanged, impregnated zeolite powder to a temperature of 250 to 350C; mixing the second heat-treated zeolite powder with a solid silica binder and a colloidal silica binder to form a mixture, wherein if the solid silica has a purity of less than or equal to 66 wt% of silica oxide based on the total weight of the solid silica, then the mixture is free of an extrusion aide and the colloidal silica has a particle size of less than 20 nm as measured along a major axis; forming the mixture into a shaped body; and heating the shaped body to result in the catalyst.
Abstract:
The subject of the present invention is a supported catalyst for the abatement of nitrogen(I) oxide especially from nitric acid plants as well as from other sources of gases emitted to atmosphere, and a method for its manufacture. The method for the preparation of the catalyst is characterised in that it contains an active phase of a spinel structure composed of cobalt oxide and zinc oxide at a weight ratio of 4-8:1 in terms of straight oxides Co 3 O 4 :ZnO and an alkaline promoter in the form of potassium at a weight ratio of 50-120:1 with respect to Co 3 O 4 , loaded on a formed support composed of α-Al 2 O 3 , whereas the amount of the active phase is 1-25% wt., preferably 5-20% wt. of the catalyst.
Abstract translation:本发明的主题是一种用于氮(I)氧化物爱的特别是从硝酸植物以及从排放到大气中的气体的其他来源的消减的负载型催化剂,以及用于其制造的方法。 用于催化剂的制备方法是DASS它包含在以4-8重量比氧化钴和氧化锌组成的尖晶石结构的活性相:在直氧化物换算的Co 3 O 4 1:ZnO和 在50〜120的重量比在钾的形式碱性启动子:1相对于Co 3 O 4,装在载体上形成由±-Al 2 O 3的,而主动相的量是1- 25%(重量),催化剂的优选5-20%(重量)。
Abstract:
A smoking article characterized by comprising a carbon monoxide reducing agent comprising particles comprising a calcium aluminate represented by the formula (CaO) m (Al 2 O 3 ) n , where 1/6 ‰¤ m/n ‰¤ 4/1, wherein the particles have a BET specific surface area of 2 m 2 /g or more and less than 20 m 2 /g.
Abstract:
A method for producing a catalyst for a Fischer-Tropsch synthesis, comprising a reduction step of obtaining the catalyst for a Fischer-Tropsch synthesis through a reduction treatment of an unreduced catalyst, wherein the unreduced catalyst comprises a carrier obtained by calcining a carrier precursor containing silica and a zirconium compound, and cobalt oxide and/or ruthenium oxide carried on the carrier; the content of zirconium in the unreduced catalyst is 0.01 to 7% by mass in terms of zirconium oxide relative to the total mass of the unreduced catalyst; and in the reduction step, a reducing gas is brought into contact with the unreduced catalyst under the conditions of a GHSV of 200 h -1 or more and 1500 h -1 or less and a linear velocity of 20 mm/s or more to perform the reduction treatment of the unreduced catalyst.
Abstract:
Process for preparing a hydrotreating catalyst comprising of from 5 wt % to 50 wt % of molybdenum, of from 0.5 wt % to 20 wt % of cobalt, and of from 0 to 5 wt % of phosphorus, all based on total dry weight of catalyst, which process comprises (a) treating a nickel containing carrier with molybdenum, cobalt and of from 1 to 60% wt of gluconic acid, based on weight of carrier, and optionally phosphorus, (b) optionally drying the treated carrier at a temperature of from 40 to 200° C., and (c) calcining the treated and optionally dried carrier at a temperature of from 200 to 650° C. to obtain the calcined treated carrier.