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Title: Comparative ignition tests of coal under oxy-fuel conditions in a standardized laboratory test rig

Journal Article · · Fuel
 [1];  [1];  [1];  [2];  [3];  [3]
  1. Ruhr-Univ. Bochum (Germany). Dept. of Energy Plant Technology
  2. Sandia National Lab. (SNL-CA), Livermore, CA (United States). Combustion Research Facility
  3. Uniper Technologies GmbH, Gelsenkirchen (Germany). Dept. of Chemical & Environmental Services

Ignitability is important to characterize pulverized coal combustion, as it is directly related to flame stability. The current paper describes a practical test rig for rapid laboratory analysis of pulverized coal cloud ignition properties. The system has been designed for conventional coal combustion conditions using air as the oxidant. In the current work, the measurement principle of the device is described and its adaption to and applicability for oxy-fuel combustion tests is demonstrated. Four coals with different rank were measured in air and in oxy-fuel atmospheres containing 20–35 vol% O2 in CO2. Finally, the major influencing factors for the investigated samples were found to be the coal rank and the gas-phase oxygen concentration, while a minor influence of particle size was observed.

Research Organization:
Sandia National Lab. (SNL-CA), Livermore, CA (United States); Ruhr-Univ. Bochum (Germany); Uniper Technologies GmbH, Gelsenkirchen (Germany)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); German Research Foundation (DFG)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1473933
Alternate ID(s):
OSTI ID: 1549561
Report Number(s):
SAND--2018-9993J; 667812
Journal Information:
Fuel, Journal Name: Fuel Vol. 208; ISSN 0016-2361
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English