@inproceedings{2739333e575b4d7d8ff291f940ab83d1,
title = "Program topic: 1. Combustion particulate formation from pulverized coal under oxy-fuel combustion conditions",
abstract = "Aerosol particulates are one of a variety of products generated by coal combustion. Combustion conditions can affect the formation of aerosol particulates, specifically, size distribution, amount, and composition. Understanding the formation of fine particulates is important for predicting emissions and understanding potential deposition. Oxy-fuel coal combustion conditions provide exhaust gas with a high concentration of CO2 versus CO2/N2 due to the recycled flue gas. The hypothesis is that this high CO2 concentration reduces the vaporization of refractory oxides from combustion according to the reaction: MOn(s) + CO(g) ↔ CO2(g) + MOn-1(g). This research investigated particulate formation in a drop tube furnace under different flue gas scenarios. Ash particulate formation has been studied as a function of furnace temperature, coal type, and gas phase conditions, namely, CO2 versus N2. A Scanning Mobility Particle Sizer (SMPS) and an Aerodynamic Particle Sizer (APS) were utilized for ash particle size distributions in sizes ranging from 14.3 nm to 20 microns. In addition, particles were collected on an eleven-stage, Berner Low Pressure Impactor (BLPI) for elemental analysis using Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS). Ultra fine ash deposition was directly related to temperature, increasing with increasing temperature. The results showed a change of particle size for high calcium and silicon coals as hypothesized.",
keywords = "Ash formation, Coal combustion, Elemental analysis, Oxyfuel",
author = "Yunlu Jia and Lighty, {Joann S.}",
year = "2011",
language = "English",
isbn = "9781618393982",
series = "28th Annual International Pittsburgh Coal Conference 2011, PCC 2011",
pages = "1005--1013",
booktitle = "28th Annual International Pittsburgh Coal Conference 2011, PCC 2011",
note = "28th Annual International Pittsburgh Coal Conference 2011, PCC 2011 ; Conference date: 12-09-2011 Through 15-09-2011",
}