2 research outputs found

    Ambient Temperature Hydrocarbon Selective Catalytic Reduction of NO<sub><i>x</i></sub> Using Atmospheric Pressure Nonthermal Plasma Activation of a Ag/Al<sub>2</sub>O<sub>3</sub> Catalyst

    No full text
    Atmospheric pressure nonthermal-plasma-activated catalysis for the removal of NO<sub><i>x</i></sub> using hydrocarbon selective catalytic reduction has been studied utilizing toluene and <i>n</i>-octane as the hydrocarbon reductant. When the plasma was combined with a Ag/Al<sub>2</sub>O<sub>3</sub> catalyst, a strong enhancement in activity was observed when compared with conventional thermal activation with high conversions of both NO<sub><i>x</i></sub> and hydrocarbons obtained at temperature ≤250 °C, where the silver catalyst is normally inactive. Importantly, even in the absence of an external heat source, significant activity was obtained. This low temperature activity provides the basis for applying nonthermal plasmas to activate emission control catalysts during cold start conditions, which remains an important issue for mobile and stationary applications

    An efficient microwave-assisted chelation (MWAC) post-synthetic modification method to produce hierarchical Y zeolites

    No full text
    We report a low-cost, highly energy efficient microwave-assisted chelation (MWAC) method, which enabled the post-synthetic modification of synthetic zeolites for adopting hierarchical structures within minutes. Exemplified by Zeolite Y, hierarchical Y zeolites prepared in this way showed exceptional specific external surface areas of >300 m2 g−1 and mesopore volumes of >0.46 cm3 g−1. Comparative assessments revealed that developed zeolites have shown significantly improved catalytic activities for catalysis involving large substrates, such as catalytic cracking and hydrocracking of plastics
    corecore