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Showing result 1 - 5 of 57 essays matching the above criteria.

  1. 1. The active phase of Pt(110) during catalytic CO oxidation

    University essay from Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

    Author : Hira Qazilbash; [2024]
    Keywords : Physics and Astronomy;

    Abstract : CO oxidation is an important topic in heterogeneous catalysis, due to its role in industrial processes such as pollution reduction in the auto industry, and ethanol or other fuel production. In the automotive catalytic converters CO oxidation reduces the poisonous CO to CO2 by reacting with O2. READ MORE

  3. 2. Biodiesel production from rape seed oil catalyzed by calcium oxide doped with lithium

    University essay from KTH/Kemiteknik

    Author : Abdulbasit Abdalla; Emilia Odgren; [2023]
    Keywords : Biodiesel; transesterifiering; FFA; glycerol; FAME; förtvålningsreaktion; Li-CaO; BET; EDS; SEM; heterogena katalysatorer; utbyte; kinetik;

    Abstract : Biodiesel ses som ett av de främsta substituten för fossila bränslen, då den relativt enkelt kan appliceras i redan existerande dieselmotorer. Dagens produktion av biodiesel använder sig av homogena katalysatorer som inte återanvänds i processen, men för en mer cirkulär och i längden en billigare process ses heterogena katalysatorer som ett alternativ. READ MORE

  4. 3. The grass is always tastier on the fruitful side : exploring the potentials, opportunities and challenges of urban food production: a case study of Uppsala

    University essay from SLU/Dept. of Urban and Rural Development

    Author : Sanaz Kalantari; Rana Toprak; [2023]
    Keywords : Urbanization; grass lawns; urban agriculture; food production; Uppsala; Ultuna Permakultur; municipal sector; planning; establishing; management; ecosystems; human-nature connectedness; extinction of experience; top-down; bottom-up; landscape architecture;

    Abstract : Urbanization has globally led to economic and infrastructural growth but has also resulted in environmental degradation, decreased access to fertile agricultural land, increased food demand, and fragmentation of essential ecosystems. These challenges are prevalent in Swedish cities, including Uppsala, where green spaces are predominantly covered by lawns. READ MORE

  5. 4. The effect of material properties on PEM fuel cell catalysts on durable oxidation reduction activity

    University essay from KTH/Kemiteknik

    Author : Xiaoling Jiang; [2023]
    Keywords : PEM fuel cell; catalyst; ORR activity; particle size; degradation; PEM-bränslecell; katalysator; syrgasreduktionsaktivitet; partikelstorlek; åldring;

    Abstract : I detta examensarbete utforskas påverkan av partikelstorleken hos Pt-katalysatorer på kolbärare på syrereduktionen i polymerelektrolytmembran (PEM)-bränsleceller. Den elektrokemiskt aktiva ytarean, aktiviteten för syrereduktion och tillhörande degraderingshastigheter för de undersökta katalysatorerna beräknas och jämförs. READ MORE

  6. 5. Development and understanding of a model V2O5/anatase TiO2(101) SCR catalyst

    University essay from Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

    Author : Johanna Paulsson; [2023]
    Keywords : Physics and Astronomy;

    Abstract : A model V2O5/ anatase TiO2(101) SCR catalyst is studied with the purpose of developing and understanding the reaction mechanism through which this catalyst reduces NOx. Several reaction mechanisms have been proposed for this catalyst in the past, but there is still no agreement on which of these describe the reaction the best, if any. READ MORE