کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7139510 1462022 2018 33 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
In situ, multiparameter optical sensor for monitoring the selective catalytic reduction process of diesel engines
ترجمه فارسی عنوان
در محل، سنسور نوری چند پارامتر برای نظارت بر روند کاتالیزوری انتخابی موتورهای دیزل
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
Selective catalytic reduction (SCR) is an effective technique to reduce nitrogen oxide (NOX) emission in high-temperature combustion processes. SCR requires strict reaction conditions, including proper temperature and ammonia (NH3) injection volume. To satisfy SCR conditions, we present a low-cost, in situ optical sensor for multiparameter measurement during SCR processes. The sensor simultaneously detected NH3 concentration, water (H2O) concentration, temperature, and pressure by using a single near-infrared diode laser. To ensure the high-quality multiparameter measurement, we realized two novel ideas: (1) wavelength modulation spectroscopy (WMS) with varied modulation amplitude and (2) an optimized multispectral fitting algorithm. We demonstrated the method by theory analysis, model simulation, laboratory verification, and field-testing with a diesel engine. The relative measurement uncertainty of NH3 concentration, H2O concentration, temperature, and pressure were 8.4%, 8.0%, 5.3% and 7.0%, respectively. The results of the field test were consistent with those obtained by thermocouples and electrochemical sensors. The presented sensor is quite suitable for SCR processes and other harsh-environment applications because of its low cost and robustness. The proposed multispectral detection method also can be used for other WMS applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 267, 15 August 2018, Pages 255-264
نویسندگان
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