摘要:
An article, at least a surface of the article being made of or containing an organic material, and a thermally sprayed layer of coating material on the surface.
摘要:
Systems for tethering an underwater vehicles using a low strength optical fiber tether. The tether system includes, a mechanical fuse that prevents a high load from acting on and severing the tether that is attached to the underwater vehicle, thus allowing use of far smaller cables than typically used. Upon separation of the fuse, a cable payout system pays out an optical fiber that keeps the underwater vehicle, typically a robotic craft, in communication with the surface vessel. The relatively light weight glass fiber may be reinforced and extended to lengths greater than 40 km allowing deep-sea exploration at depths up to 11,000 m.
摘要:
According to one embodiment of the present invention, an enhanced NH3 adsorbing automotive exhaust composition including a catalyst composition suitable for use in a selective catalytic reduction (SCR) system and an acidified support composition for enhancing NH3 adsorption capacity of the automotive exhaust composition is disclosed.
摘要:
An alumina-based lean NOx trap system for use in a lean burn engine such as a diesel engine is provided which includes at least one alumina-based lean NOx trap comprising a catalyst, an alumina NOx absorbent material, and optionally, from 0 to about 4 wt % of an alkaline earth metal oxide. The system preferably includes at least a first alumina-based lean NOx trap, and a second lean NOx trap which is positioned downstream from the first lean NOx trap in an engine exhaust. The second lean NOx trap may comprise an alumina-based trap or a conventional lean NOx trap. The lean NOx trap system converts at least a portion of NOx contained in the exhaust gas to N2 at a temperature between about 150° C. to about 500° C. The alumina-based lean NOx trap system also undergoes efficient desulphurization and maintains its activity with extended use.
摘要翻译:提供了一种用于稀燃燃烧发动机例如柴油发动机的氧化铝基稀空气捕集系统,其包括至少一个基于氧化铝的贫NOx回收器,其包含 催化剂,氧化铝NO x吸收材料和任选的0至约4重量%的碱土金属氧化物。 系统优选地包括至少第一氧化铝基贫NO x陷阱和位于第一贫NO x x的下游的第二贫NO x陷阱 发动机排气中的 SUB>陷阱。 第二贫NO x阱可以包括基于氧化铝的阱或常规的贫NO x阱陷阱。 贫NOx捕集系统将废气中包含的NO x x N 2的至少一部分在约150°C的温度下转化为N 2 C.至约500℃。基于氧化铝的贫NO X陷阱系统也经历有效的脱硫并且在延长使用时保持其活性。
摘要:
The present invention provides new platinum group metal (“PGM”) free catalytic compositions that comprise silver and/or cobalt stabilized ceria. These compositions facilitate soot oxidation during the regeneration of diesel particulate filters (DPF) thereby replacing PGM formulations. The compositions of the invention are particularly useful as washcoat compositions for DPFs as part of an automotive after-treatment system. Among the formulations tested, the silver-stabilized ceria and cobalt-stabilized ceria formulations e.g. can oxidize soot at 250-300° C. in the presence of NO2 and oxygen, while silver-stabilized ceria can oxidize diesel soot even in the presence of oxygen as the sole oxidizing agent at these temperatures. A perovshite composition containing Ag—La—Mn was very active at temperatures above 300° C.
摘要:
The present invention provides a regenerable catalyst composition suitable for entrapping SOx. The composition of the invention comprises a copper oxide having the formula (Cu/(A oxide) where A oxide is SiO2, Zr—SiO2, A12O3, TiO2—Al2O3, ZrO2 and In2O3 or mixtures thereof. Copper loading may vary from about 10 to 60 mol % and is preferably about 25 mol %. The catalyst composition adsorbs SOx as metal sulfate under lean conditions and desorbs accumulated SOx as SO2 under rich conditions. Such reversible SOx trap are able to operate under conventional NOx trap operating conditions to prevent sulfur poisoning of the NOx trap. Furthermore, these traps may be regenerated under rich conditions at 300-450° C. In another embodiment of the present invention, an irreversible SOx trap capable of collecting SOx under lean conditions is provided. The traps of this embodiment include praseodymia, zirconia-praseodymia and mixed manganese-yttria and mixtures thereof.
摘要翻译:本发明提供了适用于捕集SO x x的可再生催化剂组合物。 本发明的组合物包含具有式(Cu /(氧化物))的氧化铜,其中A氧化物为SiO 2,Zr-SiO 2,Al 2 3/3,TiO 2,Al 2 O 3,ZrO 2,N 3, 铜和负载可以在约10至60mol%之间变化,优选约25mol%,催化剂组合物吸附SO 3, 在贫条件下作为金属硫酸盐,在浓条件下,SO 2 SO 2作为SO 2 SO 2解吸,这种可逆的SO x X < 捕集阱能够在常规的捕集阱操作条件下进行操作,以防止NO x陷阱的硫中毒。此外,这些捕集阱可以在富含条件下在300-450 在本发明的另一个实施方案中,提供了能够在稀薄条件下收集SO x的不可逆SO 2捕集阱,该实施方案的捕集阱包括脯氨酸,z 氧化镨和混合锰 - 氧化钇及其混合物。