4.7 Article

Co-firing of pulverized coal with Pinion Pine/Juniper wood in raw, torrefied and pyrolyzed forms

期刊

FUEL PROCESSING TECHNOLOGY
卷 161, 期 -, 页码 273-282

出版社

ELSEVIER SCIENCE BV
DOI: 10.1016/j.fuproc.2015.11.020

关键词

Biomass co-firing; Pulverized coal; Torrefaction; Bio-char

资金

  1. Center for Agronomic and Woody Biofuels [P0135964-E]
  2. Utah State University

向作者/读者索取更多资源

A program was funded by the U.S. Forest Service to perform pilot-scale co-firing studies at the University of Utah in a 1.5 MW pulverized-coal test facility, to examine the emissions, deposition behavior and ash characteristics, when co-firing pulverized coal with wood culled from pinion juniper (P-J)forests in Utah. The woody material was evaluated in each of three forms: 1) raw, untreated material; 2) torrefied material, and 3) biochar from the pyrolysis of the P-J material. The different types of the thermally processed P-J material were produced by Amaron Energy in a 1/2 t per day prototype pyrolysis facility prior to the testing at the University of Utah. Results of the pilot-scale co-firing trials indicated essentially no major differences in gaseous emissions or un-burned carbon in flyash or baghouse ash when co-firing pulverized coal with any of the 3 biomass fuels for the conditions investigated. In addition, no significant deposition problems would be anticipated using 5-10% biomass on a thermal input basis. Operation with 10% or greater percentage of raw or torrefied wood resulted in feeding problems at this scale; however, the bio-char could be fed with no problems for levels as high as 20% (the highest percentage tested). (C) 2015 Elsevier B.V. All rights reserved.

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