Real-Time Estimation of Elemental Carbon Emitted from a Diesel Engine
详细信息 查看全文
- 作者：Arthur L. Miller ; Matthew C. Habjan ; Kihong Park
- 刊名：Environmental Science & Technology
- 出版年：2007
- 出版时间：August 15, 2007
- 年：2007
- 卷：41
- 期：16
- 页码：5783 - 5788
- 全文大小：279K
- 年卷期：v.41,no.16(August 15, 2007)
- ISSN：1520-5851
文摘
New Mining Safety and Health Administration (MSHA)regulations limit the mass concentration of airborne dieselparticulate matter (DPM) or, more specifically, theconcentration of elemental carbon (EC), in undergroundmines. The mine operators are responding by introducinga variety of controls to reduce DPM in the mines,potentially including the evaluation of new maintenanceprocedures to reduce underground mine vehicle emissions.There is currently a lack of an inexpensive and dependablemethod to directly measure the DPM concentrationemitted from the vehicle tailpipe. To that end, this workdemonstrated a simple field portable method for estimatingthe mass concentration of elemental carbon exiting thetailpipe of a diesel engine using a direct reading photometer.Simultaneous measurements of tailpipe exhaust weremade with a Thermo Electron Personal DataRAM 1200photometer (particulate mass concentration based on lightscattering) and by analyzing PM2.5 and PM1.0 samplescollected on quartz fiber filters using the National Instituteof Occupational Safety and Health (NIOSH) method 5040(mass concentration of EC via thermal-optical method).Results indicate surprisingly good correlation (R2 = 0.97)of the two methods when the data are adjusted for relativehumidity (RH) and corrected using an empirically generatedcalibration factor. Although preliminary, it may be possibleto implement this method in maintenance shops to monitoremission trends and to compare emissions of variousvehicles in a fleet. Such data will be useful for fleet planningto meet new air quality standards.