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*  Patent US7026273 - Lubricating oil compositions - Google Patents
... phosphorus derivatives deriving from the ZDDPs can poison the components of exhaust gas catalytic converters. Catalytic ... and oxides of nitrogen, from internal engine combustion exhaust emissions. Such converters use catalysts which are installed in ... where they are believed to poison the catalyst. Accordingly, the use of engine oils containing phosphorus additives may ... converters are used to reduce pollution and to meet governmental regulations requiring reduction in the levels of undesirable ...
  http://www.google.com/patents/US7026273?dq=7,003,515
*  Catalyst poisoning - Wikipedia
... but may be undesirable when the catalyst is rendered ineffective (e.g. Lead in catalytic converters). Poisoning refers ... platinum oxide finely divided on carbon) is less susceptible. Common poisons for these two metals are sulfur and nitrogen- ... and α is the fraction of the surface that is poisoned. Usually, catalyst poisoning is undesirable as it leads to a loss of ... the poison will be evenly distributed throughout the catalyst and will result in homogeneous poisoning of the catalyst. ...
  https://en.wikipedia.org/wiki/Catalyst_poisoning
*  Selective catalytic reduction - Wikipedia
... is a means of converting nitrogen oxides, also referred to as NO. x with the aid of a catalyst into diatomic nitrogen (N. 2) , ... Of more concern to SCR performance is poisons, which will destroy the chemistry of the catalyst and render the SCR ineffective ... formation of ammonium sulfate and ammonium bisulfate due to the sulfur content of the fuel as well as the undesirable catalyst- ... "Environmental Effects of Nitrogen Oxides". Electric Power Research Institute, 1989 *^ "Archived copy". Archived from the ...
  https://en.wikipedia.org/wiki/Selective_catalytic_reduction
*  Hybrid fischer-tropsch catalysts and processes for use thereof - Chevron U.S.A. Inc.
Common poisons for FT catalysts include sulfur, nitrogen-containing compounds such as hydrogen cyanide and ammonia. Catalyst ... As an alternative or in addition to the metal oxide promoter, the catalyst may comprise a metal promoter selected from Groups ... techniques well known to those skilled in the art so as to distend the catalytic metals in a uniform thin layer on the catalyst ... of an acidic component such as a zeolite enables the hybrid Fischer-Tropsch catalyst to limit the formation of undesirable ...
  http://www.freepatentsonline.com/9023899.html
*  Patent US7220502 - Process and system for converting carbonaceous feedstocks into energy ... - Google Patents
... such as sulfur oxides and nitrogen oxides. However, to date none of these clean coal programs aim to eliminate the emissions of ... In the Fischer-Tropsch catalytic reactor 30, the syngas in line 22 is reacted over a catalyst 70 to form higher boiling ... contain contaminates that are catalyst poisons. Therefore, extreme care must be taken in the acceptance of such a broad classes ... The syngas is quite clean, with undesirable compounds at the 10−5 mole percent level (i.e. 0.1 ppm). This syngas ratio H2/CO of ...
  http://www.google.co.uk/patents/US7220502
*  Catalysts | Free Full-Text | Oxidation Catalysts for Elemental Mercury in Flue Gases-A Review | HTML
For each type of catalyst the possible mechanisms as well as the effect of flue gas components on activity and stability are ... A review article published in 2006 covers the progress in the elemental mercury (Hgel) catalytic oxidation area. This paper ... noble metal and transition metal oxide based catalysts have been investigated at both the laboratory and plant scale with this ... The possible future directions of catalyst development in this environmental research area are outlined. ...
  http://www.mdpi.com/2073-4344/2/1/139/htm
*  Glossary of Terms
Nitrous Oxide. A chemical compound made up of nitrogen and oxygen, N2O. It is a liquid that turns into a gas when injected into ... Catalyst. A substance that initiates or increases the rate of a chemical reaction, without itself being used up in the process. ... The undesirable accumulation of carbon (coke) deposits in the internal combustion engine or in a refinery plant. The process of ... Catalytic Converter. An integral part of vehicle emission control systems since 1975. Oxidizing converters remove hydrocarbons ...
  http://www.machinerylubrication.com/Glossary
*  Catalytic converter - Wikipedia
... "catalyst poison" and would effectively disable a catalytic converter by forming a coating on the catalyst's surface. Catalytic ... A three-way catalytic converter has three simultaneous tasks: Reduction of nitrogen oxides to nitrogen (N2) 2 CO + 2 NO → 2 CO2 ... The converter heats up quickly, due to its exposure to the very hot exhaust gases, enabling it to reduce undesirable emissions ... catalyst is sufficiently oxygen-saturated. Catalyst poisoning occurs when the catalytic converter is exposed to exhaust ...
  https://en.wikipedia.org/wiki/Catalytic_converter
*  PPT - CHEMICAL FUELS PowerPoint Presentation - ID:6638269
catalytic converter as the lead present poisons the catalyst *thus destroying the active sites. ... ii) Nitrogen: Determined by digesting a known quantity (1g) of powdered air-dried coal sample in a kjeldhal's flask with conc. ... Oxides of sulphur pollutes the environment and leads to * corrosion.. *(iv) Ash: The ash content of coal sample is determined ... The product contains a very little amount of undesirable. * sulphur. *There is a saving in production costs since high temper- ...
  https://www.slideserve.com/karina-webster/chemical-fuels
*  Patent US3900646 - Method of plating metal uniformly on and throughout porous structures - Google Patents
Catalytic oxidative dehydrogenation process and catalyst. US6072097 *. Sep 3, 1998. Jun 6, 2000. Regents Of The University Of ... Thus, if catalyst poisoning occurs during subsequent use, the outer metal layers can be readily removed such as by dipping in ... The chamber is purged for 1 hour and 10 minutes first with nitrogen and for the final l0 minutes with a mixture of nitrogen and ... beryllium oxide and zirconium oxide. In accordance with a preferred embodiment, it is desirable to use as ceramic materials ...
  http://www.google.com/patents/US3900646?dq=ascentive
*  Exhaust gas - Wikipedia
Catalytic converters in cars intend to break down the pollution of exhaust gases using a catalyst. Scrubbers in ships intend to ... Mono-nitrogen oxides NO and NO2 (whether produced this way or naturally by lightning) react with ammonia, moisture, and other ... Carbon monoxide poisoning is the most common type of fatal air poisoning in many countries. Carbon monoxide is colorless, ... A relatively small part of combustion gas is undesirable, noxious, or toxic substances, such as carbon monoxide (CO) from ...
  https://en.wikipedia.org/wiki/Exhaust_gas
*  US7252756B2 - Preparation of components for refinery blending of transportation fuels - Google Patents
... fuel or components for refinery blending of transportation fuels having a reduced amount of sulfur and/or nitrogen-containing ... Sulfur is a catalyst poison that reduces catalytic activity. Furthermore, in the context of catalytic control of Diesel ... The higher nitrogen distillate feedstocks are generally coker distillate and the catalytic cycle oils. These distillate ... Study of the operation conditions with a vanadium oxide based catalyst. US5582714A (en) 1996-12-10. Process for the removal of ...
  https://patents.google.com/patent/US7252756B2/en
*  Rhenium - Wikipedia
Rhenium in the form of rhenium-platinum alloy is used as catalyst for catalytic reforming, which is a chemical process to ... Rhenium catalysts are very resistant to chemical poisoning from nitrogen, sulfur and phosphorus, and so are used in certain ... The most common oxide is the volatile colourless Re2O7. Rhenium trioxide ReO3 adopts a perovskite-like structure. Other oxides ... Rhenium can cause superalloys to become microstructurally unstable, forming undesirable TCP (topologically close packed) phases ...
  https://en.wikipedia.org/wiki/Rhenium
*  Purification of unsaturated dinitriles by contacting with chi-alumina prior to hydrogenation - Patent # 4235808 -...
It has been found that, during such catalytic hydrogenationprocesses, the catalyst becomes poisoned which results in a short ... of the above-noted ruthenium on gamma-alumina catalyst composition. The reactor was flushed with nitrogen and the catalystwas ... Any suitable suppressant can be employed to suppress undesirable side reactions in the hydrogenation of unsaturated dinitriles ... Examples of such suitable hydrogen-reducible compounds include oxides, halides, nitrates, oxalates, acetates, carbamates, ...
  http://www.patentgenius.com/patent/4235808.html
*  Catalysis in industry
The exhaust gases also contain nitrogen(II) oxide (nitric oxide, NO), and this is removed by reactions catalysed principally by ... Many catalysts are prone to poisoning which occurs when an impurity attaches itself to the surface of the catalyst and prevents ... Both the oxide and the metals have catalytic roles to play, an example of bifunctional catalysis. There are hydroxyl groups on ... Some reactions lead to undesirable side products. For example in the cracking of gas oil, carbon is formed which is deposited ...
  http://essentialchemicalindustry.org/processes/catalysis-in-industry.html
*  The Secret History of Lead | The Nation
Arie Haagen-Smit reported that the interaction of hydrocarbons (HC) and oxides of nitrogen (NOX) caused smog in Los Angeles. By ... lead poisoning usually had to be severe enough to cause death or severe brain damage to be considered a diagnosed poisoning ... Nor was it the concern of other auto makers, who followed suit announcing that they too would adopt the catalyst to meet ever- ... "Of late the lead industries have been receiving much undesirable publicity," LIA reminded its members, as if it had forgotten ...
  https://www.thenation.com/article/secret-history-lead/?page=0,0
*  Patent US7342142 - Hydrogenation of polytrimethylene ether glycol - Google Patents
A process comprising contacting PO3G having color with hydrogen in the presence of a hydrogenation catalyst, wherein the PO3G, ... or poison, the catalyst. The amount of catalyst could be as low as about 0.05% of the composition, or 0.01%, or 0.005% or even ... mixed copper and zinc oxides, and mixed copper and chromium oxides. An example of the preferred catalyst is nickel, which may ... Catalytic hydrogenation is the reaction of a compound with hydrogen in the presence of a catalyst. Hydrogenation has been used ...
  http://www.google.com/patents/US7342142?dq=5708422
*  March 20, 2000 The Nation
Arie Haagen-Smit reported that the interaction of hydrocarbons (HC) and oxides of nitrogen (NOX) caused smog in Los Angeles. By ... lead poisoning usually had to be severe enough to cause death or severe brain damage to be considered a diagnosed poisoning ... 1928. Lead Industries Association formed to combat 'undesirable publicity.' 1928. Surgeon General tells NYC there are 'no good ... Nor was it the concern of other auto makers, who followed suit announcing that they too would adopt the catalyst to meet ever- ...
  http://worldcarfree.net/resources/freesources/Secret.htm
*  Nouvelle page 4
It can include nitrogen oxides, carbon oxides, water vapor, sulfur oxides, particles and many chemical pollutants. flue gas ... catalytic incinerator: A control device that oxidizes volatile organic compounds (VOCs) by using a catalyst to promote the ... dermal toxicity: The ability of a pesticide or toxic chemical to poison people or animals by contact with the skin. ... If organic matter decays when there is no oxygen present (anaerobic conditions or putrefaction), undesirable tastes and odors ...
  http://vietsciences.free.fr/tuvung/environment.htm
*  Patente US5843390 - Method of using a catalytic filter - Google Patentes
... from the filter stream before the dust can clog active catalytic sites and effectively catalytically coverts undesirable ... The filter employs composite fibers of expanded polytetrafluoroethylene (PTFE) filled with catalytic particles. The composite ... A method of using an improved catalytic filter material for removing contaminants such as NOx from a fluid stream. ... for sulphur di:oxide determn. - involves ammonia removal using nitrogen oxide(s) removing catalyst. ...
  http://www.google.es/patents/US5843390
*  Apparatus for generation and use of lift gas - Patent # 7871036 - PatentGenius
... wherein the catalyst is copper on alumina or copper on zinc oxide.. 15. The method of claim 12, wherein the catalyst is an iron ... sulfur can poison catalyst involved with the reforming reaction). Note that other reforming reaction fuel sources may also need ... Where air is used as the oxidizer, there will also be nitrogen left over which can serve as part of the lift gas, or be removed ... However, when it comes time to vent the auxiliary balloon during the day, the lift gas is run through a catalytic reactor to ...
  http://www.patentgenius.com/patent/7871036.html
*  EP0765189B1 - Layered catalyst composite - Google Patents
... substantially simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides ... The structure of the layered catalyst composite of the present invention is designed wherein there is a first layer and a ... The present invention relates to a layered catalyst composite of the type generally referred to as a three-way conversion ... Catalytic manner to therefor to catalytic reduction of nitrogen oxides US6764665B2 (en) 2001-10-26. 2004-07-20. Engelhard ...
  https://patents.google.com/patent/EP0765189B1/en
*  US7341977B2 - Method of sorbing sulfur compounds using nanocrystalline mesoporous metal oxides - Google Patents
... nanocrystalline metal oxide. In a preferred embodiment, nanocrystalline metal oxide particles are formed into pellets ( 14 ) ... Preferred metal oxide compounds either exhibit soft Lewis acid properties or are impregnated with a material exhibiting soft ... Generally, compounds according to the present invention comprise mesoporous, nanocrystalline metal oxides. ... Poison resistant catalyst systems and associated processes US8765628B2 (en) * 2010-11-09. 2014-07-01. Exxonmobil Research And ...
  https://patents.google.com/patent/US7341977
*  Patent US3878564 - Blood and tissue detoxification method - Google Patents
... water and nitrogen which are easily dissipated. The cells have hydrophobic cathodes having a membrane thereover of silicone ... Method and apparatus for blood and tissue detoxification by oxidation of excess undesirable or toxic substances such as ammonia ... it is believed that the Cl ions do not actually reach the Ag catalyst and thus no Cl" poisoning can occur. ... silver oxide, gold or other catalysts inert to ammonia. The outer surface of the cathode is coated with a layer of silicone ...
  http://www.google.com/patents/US3878564?dq=6272333
*  Patent US4085030 - Pyrolysis of carbonaceous materials with solvent quench recovery - Google Patents
... is particularly effective when done in combination with solids removal because solids can poison and plug up catalyst beds, ... Fluidized catalytic cracking apparatus. US9109177. Dec 10, 2012. Aug 18, 2015. Ensyn Renewables, Inc.. Systems and methods for ... this is undesirable because more valuable char has to be burned to achieve desired char temperatures than if carbon dioxide ... 4, the transport gas can be a hot air stream mixed with a diluent gas essentially free of free oxygen such as nitrogen or a ...
  http://www.google.com/patents/US4085030?dq=6106459