摘要:
A process for production of ammonia includes: providing a reaction stream including carbon monoxide and hydrogen; passing the reaction stream and steam over a water gas shift catalyst in a catalytic shift reactor, forming a shifted gas mixture depleted in carbon monoxide and enriched in hydrogen; passing the shifted gas mixture with an oxygen-containing gas over a selective oxidation catalyst at ≧175° C., forming a selectively oxidized gas stream with a portion of the carbon monoxide converted to carbon dioxide; removing some of the carbon dioxide from the selectively oxidized gas stream in a carbon dioxide removal unit; passing the carbon dioxide depleted stream over a methanation catalyst in a methanator to form a methanated gas stream, optionally adjusting its hydrogen:nitrogen molar ratio to form an ammonia synthesis gas; and passing the ammonia synthesis gas over an ammonia synthesis catalyst in an ammonia converter to form ammonia.
摘要:
Disclosed is a supported nanoparticle catalyst, methods of making the supported nanoparticle 5 catalysts and uses thereof. The supported nanoparticle catalyst includes catalytic metals M1, M2, M3, and a support material. M1 and M2 are different and are each selected from nickel (Ni), cobalt (Co), manganese (Mn), iron (Fe), copper (Cu) or zinc (Zn), wherein M1 and M2 are dispersed in the support material. M3 is a noble metal deposited on the surface of the nanoparticle catalyst and/or dispersed in the support material. The nanoparticle catalyst is 10 capable of producing hydrogen (H2) and carbon monoxide (CO) from methane (CH4) and carbon dioxide (CO2).
摘要:
A composite photocatalyst, a manufacturing method thereof, the kits including the composite photocatalyst, and a bactericide photocatalyst. A composite photocatalyst includes photocatalyst nanocrystals and platinum nanocrystals. The photocatalyst nanocrystals include a compound represented by the following chemical formula (1): A2+(B3+)2X4 chemical formula (1), wherein A2+ represents Zn2+, Cu2+, Fe2+, Mn2+, Ni2+, Co2+ or Ag22+; B3+ represents Fe3+, Mn3+ or Cr3+; and X represents O2−.
摘要:
The present invention provides a process and catalyst for the autothermal and dry reforming of methane to produce syngas. The process provides a direct single step gas phase reforming of methane or natural gas to syngas over Ni—Pt supported nanocrystalline ZrO2. The process provides methane conversion of 54-99% with H2/CO ratio of 1.14 to 1.42 (mol %) in the temperature range of 250 to 750 800° C. at atmospheric pressure.
摘要:
A photocatalyst partial oxidation of methanol reforming process can be rapidly started via the use of a photocatalytic reaction at a reaction temperature below 150° C., and hydrogen having a low carbon monoxide content is produced at a high methanol conversion rate.
摘要:
A zoned catalysed substrate monolith comprises a first zone and a second zone that are arranged axially in series. The first zone comprises a platinum group metal loaded on a support and a first base metal oxide or a first base metal loaded on an inorganic oxide. The first base metal oxide is iron oxide, manganese oxide, copper oxide, zinc oxide, nickel oxide, or mixtures thereof. The first base metal is iron, manganese, copper, zinc, nickel, or mixtures thereof. The second zone comprises copper or iron loaded on a zeolite and a second base metal oxide or a second base metal loaded on an inorganic oxide. The second base metal oxide is iron oxide, manganese oxide, copper oxide, zinc oxide, nickel oxide, or mixtures thereof. The second base metal is iron, manganese, copper, zinc, nickel, or mixtures thereof. The second base metal is different from the first base metal.
摘要:
A method of producing an alumina-supported cobalt catalyst for use in a Fischer-Tropsch synthesis reaction, which comprises: calcining an initial γ-alumina support material at a temperature to produce a modified alumina support material; impregnating the modified alumina support material with a source of cobalt; calcining the impregnated support material, activating the catalyst with a reducing gas, steam treating the activated catalyst, and activating the steam treated catalyst with a reducing gas.
摘要:
A heterogeneous catalyst that is a combination of rhodium, zinc, iron, a fourth metal and at least one metal selected from alkali metals and alkaline earth metals on a catalyst support (e.g. at least one of silica, alumina, titania, magnesia, zinc aluminate (ZnAl2O4), magnesium aluminate (MgAl2O4), magnesia-modified alumina, zinc oxide-modified alumina, zirconium oxide-modified alumina, and zinc oxide) and use of the catalyst in converting an alkylene to an oxygenate that has one more carbon atom than the alkylene.
摘要翻译:催化剂载体上的铑,锌,铁,第四金属和至少一种选自碱金属和碱土金属的金属的组合的多相催化剂(例如二氧化硅,氧化铝,二氧化钛,氧化镁,铝酸锌中的至少一种 (ZnAl 2 O 4),铝酸镁(MgAl 2 O 4),氧化镁改性氧化铝,氧化锌改性氧化铝,氧化锆改性氧化铝和氧化锌),并使用该催化剂将亚烷基转化为具有比碳原子多一个碳原子的氧化物 亚烷基。
摘要:
An oxidative steam reforming of methanol (OSRM) process at low temperature includes providing a gas mixture comprising methanol, steam and oxygen and conducting the gas mixture to flow through an AuCu/ZnO-based catalyst for undergoing OSRM process to generate hydrogen, wherein an initiation temperature of OSRM is less than 175° C. The AuCu/ZnO catalyst of the present invention may lower the initiation temperature of the OSRM process and remains to have good catalytic efficiency without undergoing pre-reduction. A steam reforming of methanol (SRM) process is also herein provided.
摘要:
A process and system (18) for reducing NOx in a gas using hydrogen as a reducing agent is provided. The process comprises contacting the gas stream (29) with a catalyst system (38) comprising sulfated zirconia washcoat particles (41), palladium, a pre-sulfated zirconia binder (44), and a promoter (45) comprising at least one of titanium, zinc, or a mixture thereof. The presence of zinc or titanium increases the resistance of the catalyst system to a sulfur and water-containing gas stream.