摘要:
The present invention relates to a process for the preparation of nanocrystalline metal oxide particles comprising the steps of a) the introduction of a starting compound into a reaction chamber by means of a carrier fluid, b) the subjecting of the starting compound in a treatment zone to a pulsating thermal treatment, c) the forming of nanocrystalline metal oxide particles, d) the removal of the nanocrystalline metal oxide particles obtained in steps b) and c) from the reactor, wherein the starting compound is introduced into the reaction chamber in the form of a solution, slurry, suspension or in solid aggregate state. Further, the present compound relates to a catalyst material, obtainable by the process according to the invention, in particular a catalyst material for use in the preparation of methanol from carbon monoxide and hydrogen.
摘要:
A high-temperature open-cell porous body, the body comprises crystalline inorganic particles and 0.5 to 3-weight percent glass. The crystalline inorganic particles are bonded together by the glass to form a matrix with interconnected pores having a porosity of greater than 20-percent. The crystalline inorganic particles may further include interconnected micro pores, the latter combination providing a matrix with both macro porosity and micro porosity.
摘要:
The purpose of the present invention is to provide a catalyst for exhaust gas purification, which is capable of effectively processing an exhaust gas, particularly carbon monoxide (CO) and hydrocarbon (HC) in the exhaust gas at a low temperature, and a method for producing the catalyst for exhaust gas purification. The purpose is achieved by a catalyst for exhaust gas purification, which is obtained by having a carrier that contains Al2O3 and one or more metal oxides selected from the group consisting of zirconium oxide (ZrO2), cerium oxide (CeO2), yttrium oxide (Y2O3), neodymium oxide (Nd2O3), silicon oxide (SiO2) and titanium oxide (TiO2) support one or more catalyst components selected from the group consisting of gold (Au), silver (Ag), platinum (Pt), palladium (Pd), rhodium (Rh), iridium (Ir), ruthenium (Ru) and osmium (Os). The metal oxides have particle diameters of less than 10 nm.
摘要翻译:本发明的目的是提供一种排气净化用催化剂,其能够在低温下有效地处理排气中的废气,特别是一氧化碳(CO)和烃(HC) 生产废气净化催化剂。 其目的是通过具有含有Al 2 O 3的载体和选自氧化锆(ZrO 2),氧化铈(CeO 2),氧化钇(Y 2 O 3)等的一种以上的金属氧化物而得到的废气净化用催化剂实现。 ),氧化钕(Nd 2 O 3),氧化硅(SiO 2)和氧化钛(TiO 2)支持一种或多种选自金(Au),银(Ag),铂(Pt),钯(Pd) ,铑(Rh),铱(Ir),钌(Ru)和锇(Os)。 金属氧化物的粒径小于10nm。
摘要:
Provided are catalyst composites useful for the production of vinyl acetate monomer, as well as methods of making using same. The catalyst composites may comprise a support comprising silica and about 1 to about 3 wt-% alumina, wherein the support has a surface area of about 175 to about 300 m2/g; and an eggshell layer on the support comprising Pd and Au.
摘要:
Systems and methods for treating a fluid with a body are disclosed. Various aspects involve treating a fluid with a porous body. In select embodiments, a body comprises ash particles, and the ash particles used to form the body may be selected based on their providing one or more desired properties for a given treatment. Various bodies provide for the reaction and/or removal of a substance in a fluid, often using a porous body comprised of ash particles. Computer-operable methods for matching a source material to an application are disclosed. Certain aspects feature a porous body comprised of ash particles, the ash particles have a particle size distribution and interparticle connectivity that creates a plurality of pores having a pore size distribution and pore connectivity, and the pore size distribution and pore connectivity are such that a first fluid may substantially penetrate the pores.
摘要:
The present invention relates to a method for producing the activated catalyst for Fischer-Tropsch synthesis comprising: a first step of reducing a catalyst for Fischer-Tropsch synthesis; a second step of preparing liquid hydrocarbon in which a part or all of molecular oxygen is eliminated; and a third step of introducing the reduced catalyst prepared in the first step into the liquid hydrocarbon prepared in the second step while blocking its contact with air. Since the reduced catalyst used for Fischer-Tropsch synthesis is introduced into liquid hydrocarbon from which molecular oxygen is removed or coated by liquid hydrocarbon, the catalyst for Fischer-Tropsch synthesis activated based on the present invention maintains a high activity even if exposed to the air for a long time, thereby easily facilitating the long-term storage and long-distance transfer of the reduced catalyst.
摘要:
An emission control catalyst for treating an engine exhaust includes non-precious metal group (“NPGM”) mixed phase oxide catalyst having a mullite phase containing optionally in close contact with other metal oxides. The mixed phase catalyst may be included in one or more layers or zones of a multi-layered or multi-zoned emission control catalyst and optionally in combination with precious metal catalysts such as Pt, Pd and Au.
摘要:
A hydrogenation treatment catalyst is provided for heavy hydrocarbon oil, in which a hydrogenation-active component is supported on a silica-containing porous alumina carrier containing 0.1% to 1.5% by mass of silica based on the carrier. The total pore volume is 0.55 to 0.75 mL/g. Of the total volume of pores having a pore diameter of 3 to 30 nm (1) 30% to 45% have a pore diameter of 5 to 10 nm, (2) 50% to 65% have a pore diameter of 10 to 15 nm, and (3) the total volume of pores having a pore diameter in a range of ±1 nm from the average pore diameter is 25% or more. The total volume of pores having a pore diameter of 30 nm or more is 3% or less. The average pore diameter of pores having a pore diameter of 10 to 30 nm is 10.5 to 13 nm.
摘要:
Zeolites are industrially important materials possessing high Bronsted acidity and shape-selectivity. However, their inherently small pores restrict application for catalytic conversion of bulky molecules. A method of synthesis of ‘artificial’ zeolites. The artificial zeolites have well-tailored Bronsted and Lewis acid sites prepared on mesostructured silica to circumvent this limitation. This novel approach utilizes atomic layer deposition to tailor both porosity and acid speciation, providing exquisite control over catalytic behavior and enabling systematic studies.
摘要:
This invention reveals a method for synthesizing a hydrotreating catalyst wherein the support is prepared by mixing of peptized alumina with an amorphous silica or crystalline aluminum silicate as one component of the catalyst. The catalyst comprises a group VI metal and/or a group VIII metal of the periodic table. The catalyst exhibits improved hydrocracking, hydrodesulfurization and hydrodemetallization activities and has a relatively stable life with time on stream. Thus, the invention concerns a method for developing a catalyst for hydroprocessing of heavy hydrocarbon feedstocks which is characterized by two steps: the first step consists of the optimization of a catalyst formulation with respect to the textural properties, number of acid sites, active metal incorporation. The second step consists of the evaluation with real feedstock and catalyst stability with time-on-stream.