PMID- 22468843
OWN - NLM
STAT- MEDLINE
DCOM- 20120910
LR  - 20131121
IS  - 1520-5851 (Electronic)
IS  - 0013-936X (Linking)
VI  - 46
IP  - 9
DP  - 2012 May 1
TI  - Ash particulate formation from pulverized coal under oxy-fuel combustion 
      conditions.
PG  - 5214-21
LID - 10.1021/es204196s [doi]
AB  - Aerosol particulates are generated by coal combustion. The amount and properties 
      of aerosol particulates, specifically size distribution and composition, can be 
      affected by combustion conditions. Understanding the formation of these particles 
      is important for predicting emissions and understanding potential deposition. 
      Oxy-fuel combustion conditions utilize an oxygen-enriched gas environment with 
      CO(2). The high concentration of CO(2) is a result of recycle flue gas which is 
      used to maintain temperature. A hypothesis is that high CO(2) concentration 
      reduces the vaporization of refractory oxides from combustion. A high-temperature 
      drop-tube furnace was used under different oxygen concentrations and CO(2) versus 
      N(2) to study the effects of furnace temperature, coal type, and gas phase 
      conditions on particulate formation. A scanning mobility particle sizer (SMPS) 
      and aerodynamic particle sizer (APS) were utilized for particle size 
      distributions ranging from 14.3 nm to 20 mum. In addition, particles were 
      collected on a Berner low pressure impactor (BLPI) for elemental analysis using 
      scanning electron microscopy and energy dispersive spectroscopy. Three particle 
      size modes were seen: ultrafine (below 0.1 mum), fine (0.1 to 1.0 mum), and coarse 
      (above 1 mum). Ultrafine mass concentrations were directly related to estimated 
      particle temperature, increasing with increasing temperature. For high silicon 
      and calcium coals, Utah Skyline and PRB, there was a secondary effect due to 
      CO(2) and the hypothesized reaction. Illinois #6, a high sulfur coal, had the 
      highest amount of ultrafine mass and most of the sulfur was concentrated in the 
      ultrafine and fine modes. Fine and coarse mode mass concentrations did not show a 
      temperature or CO(2) relationship. (The table of contents graphic and abstract 
      graphic are adapted from ref 27.).
CI  - (c) 2012 American Chemical Society
FAU - Jia, Yunlu
AU  - Jia Y
AD  - Department of Chemical Engineering, University of Utah, 50 South Central Campus 
      Drive, Salt Lake City, Utah 84112, USA.
FAU - Lighty, JoAnn S
AU  - Lighty JS
LA  - eng
PT  - Journal Article
PT  - Research Support, U.S. Gov't, Non-P.H.S.
DEP - 20120416
PL  - United States
TA  - Environ Sci Technol
JT  - Environmental science & technology
JID - 0213155
RN  - 0 (Coal Ash)
RN  - 0 (Particulate Matter)
RN  - 142M471B3J (Carbon Dioxide)
RN  - N762921K75 (Nitrogen)
SB  - IM
MH  - Carbon Dioxide/chemistry
MH  - Coal Ash/*analysis
MH  - *Hot Temperature
MH  - Nitrogen/chemistry
MH  - Particle Size
MH  - Particulate Matter/*analysis
EDAT- 2012/04/04 06:00
MHDA- 2012/09/11 06:00
CRDT- 2012/04/04 06:00
PHST- 2012/04/04 06:00 [entrez]
PHST- 2012/04/04 06:00 [pubmed]
PHST- 2012/09/11 06:00 [medline]
AID - 10.1021/es204196s [doi]
PST - ppublish
SO  - Environ Sci Technol. 2012 May 1;46(9):5214-21. doi: 10.1021/es204196s. Epub 2012 
      Apr 16.