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تحقیق و طراحی مهندسی شیمی
جزئیات رویداد
همایش ، رویداد ، ژورنال
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  • catalyst ‘light-off’ experiments on a diesel oxidation catalyst connected to a diesel engine—methodology and techniques

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    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 873
    • تعداد پرسش و پاسخ ها: 0
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     a methodology was developed, which helped to investigate the ‘light-off’ characteristics of a real diesel oxidation catalyst (doc) while it was connected to a diesel engine. as a demonstration of the technique, trials were performed on a ford 2.0 l engine, with a pt on γ-alumina doc (o.d. = 106 mm; length = 114 mm). by operating the engine at a constant speed (e.g. 2000 rpm), it was shown that when the engine torque was varied (e.g. from 5 to 47 n m), the gas inlet temperature to the doc could also be varied (e.g. from 146 to 285 °c), while the gas composition and the mass flow of gas remained relatively constant—this enabled more scientific studies of catalyst ‘light-off’ to be performed on a real exhaust system. experiments were also performed with higher background levels of a reactant (e.g. co concentrations = 3000, 4000 and 5000 ppm), and hysteresis between ‘light-off’ and ‘light-down’ was observed. it was also shown how valuable additional information may be obtained from experiments using a thin-slice doc (o.d. = 106 mm; length = 5 mm), and the co inhibition effect was demonstrated on a real engine exhaust.

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