Results 41 - 50 of 53

• Role of Lubrication Oil in Particulate Emissions from a Hydrogen-Powered Internal Combustion Engine
  10/1/2007 - Peer reviewed journal articles
  The primary goal of this study was to investigate the formation of combustion-generated particles derived from lubrication oil in the absence of fuel-produced soot.
• Numerical Analysis of the Influence of In-Seam Horizontal Methane Drainage Boreholes on Longwall Face Emission Rates
  9/1/2007 - Peer reviewed journal articles
  This study investigates different horizontal methane drainage borehole patterns, borehole lengths, and degasification times prior to and during panel extraction to evaluate their effectiveness in reducing methane emissions using a dynamic 3D reservoir m...
• Reservoir Simulation-Based Modeling for Characterizing Longwall Methane Emissions and Gob Gas Venthole Production
  7/1/2007 - Peer reviewed journal articles
  This paper presents the development and results of a comprehensive, "dynamic," three-dimensional reservoir model of a typical multi-panel Pittsburgh coalbed longwall mine. Results presented in this paper include a simulation of gas flow patterns from th...
• Comparing Measurements of Carbon in Diesel Exhaust Aerosols Using the Aethalometer, NIOSH Method 5040, and SMPS
  4/1/2007 - Peer reviewed journal articles
  The objective of this paper is to compare the results among (1) a NIOSH published standard to determine the mass of EC and OC on filter samples, (2) the aethalometer, which uses light extinction to measure "black carbon" or BC, and (3) measuring particl...
• The Effects of Water Spray Placement for Controlling Respirable Dust and Face Methane Concentrations
  4/1/2006 - Peer reviewed journal articles
  A series of laboratory evaluations examined the impact of water spray pressure, curtain setback distance, and external and underboom spray use for controlling respirable dust levels and sulfur hexafluoride tracer gas concentrations around a continuous m...
• Methods to Determine the Status of Mine Atmospheres - an Overview
  4/1/2006 - Conference papers, Peer reviewed journal articles
  This paper serves as an overview to remind and/or instruct readers about gas-sampling methodologies and gas analyses to assist in determining the status of underground atmospheres.
• The Use of Light Scattering and Ion Chamber Responses for the Detection of Fires in Diesel Contaminated Atmospheres
  6/1/2002 - Peer reviewed journal articles
  Experiments were conducted to determine the optical scattering properties of diesel particulate matter (DPM) and various combustion aerosols from both flaming and smoldering combustion sources at discrete angles of 151 and 301 in the forward direction...
• Ignition Hazard From Internally-generated H2 in Sealed Mining Equipment
  7/1/2001 - Peer reviewed journal articles
  A number of ignition incidents involving mining and farm equipment have illustrated the surprising danger of drilling, cutting, or otherwise penetrating sealed compartments or frames that are filled with metal scrap for ballast.
• Particulate Penetration of Porous Foam Used as a Low Flow Rate Respirable Dust Size Classifier
  7/1/2000 - Peer reviewed journal articles
  Because of the need to provide short-term or real-time estimates of worker respirable dust exposure, porous foam may be a viable classification media for a low flow rate, disposable respirable dust sampler for use in the coal mining industry.
• Flammability of Gas Mixtures Containing Volatile Organic Compounds and Hydrogen
  5/1/2000 - Peer reviewed journal articles
  An experimental program was conducted to evaluate the accuracy of some current methods for predicting the flammability of gas mixtures containing hydrogen and flammable or nonflammable volatile organic compounds (VOCs) in air.