Essays about: "catalyst poisoning"

Showing result 1 - 5 of 8 essays containing the words catalyst poisoning.

  1. 1. Sulfur poisoning and regeneration of copper zeolites for NH3-SCR : Effect of SO2/SO3 ratio

    University essay from Luleå tekniska universitet/Kemiteknik

    Author : Åsa Högström; [2018]
    Keywords : Cu-zeolites; Ammonia-SCR; Sulfur poisoning; Regeneration; Kinetic model;

    Abstract : The road transportation is a big source for the release of NOx emissions. NOx has been confirmed to cause negative affect on the air-quality especially in the urban areas, there are therefore regulations for allowed released amount from vehicles. READ MORE

  3. 2. Effect of Biofuel Impurities on the Diesel Oxidation Catalyst

    University essay from KTH/Skolan för kemivetenskap (CHE)

    Author : Liene Kienkas; [2017]
    Keywords : DIESEL OXIDATION CATALYST; POISONING; PHOSPHORUS; SODIUM; CALCIUM; MATERIAL CHARACTERIZATION; ACTIVITY TESTING;

    Abstract : Scania provides sustainable transport systems powered by bioethanol, biogas, biodiesel along with hybrid and conventional solutions. Today Scania offers the largest variety of engines operating on alternative fuels in the market. The number of the alternative fuel operated vehicles sold in 2016 increased by 40 % [1]. READ MORE

  4. 3. Sulfur tolerance of SCR catalysts : Development of a lab testing method

    University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Author : Cornelia Lantto; [2017]
    Keywords : ;

    Abstract : NOx emissions from diesel vehicles are a currently well-discussed matter due to the related health and environmental issues. At the same time, diesel vehicles are an important part of transportation in society as diesel engines are more fuel efficient than gasoline engines. READ MORE

  5. 4. PILCs for trapping phosphorus in a heavy duty engine exhaust system : An experimental evaluation of the phosphorus sorption capability of different clay materials

    University essay from Uppsala universitet/Strukturkemi

    Author : Anders Kvarned; [2016]
    Keywords : PILC; PCH; phosphorus sorption; exhaust treatment; catalyst poisoning;

    Abstract : In order to fulfil the requirements in the EURO VI standard, regulating emissions from heavy duty vehicles, the exhaust aftertreatment system needs to maintain its efficiency for at least seven years or 700 000 km. In diesel applications the diesel oxidation catalyst (DOC) is located closest to the engine and is thus the most vulnerable to poisoning contaminants, such as phosphorus originating from fuel and oil additives, which deactivates the catalyst. READ MORE

  6. 5. Evaluation of Non-Noble Metal Catalysts for CO Oxidation

    University essay from KTH/Skolan för kemivetenskap (CHE)

    Author : Daniel Jonsson; [2016]
    Keywords : CO oxidation; sulfur; deactivation; catalysis; CuO;

    Abstract : The aim of the study is to evaluate the ability of non-noble metal catalysts to function as the commercially used noble metal catalyst. The exhaust gas that was used in the project is generated from a heater developed by ReformTech AB with diesel as fuel. The compound that was focused on is carbon monoxide that has a concentration of 300-750 ppm. READ MORE