Transformation of minerals in coal and biomass upon heating and their impacts on co-firing

Tao Wu, Jie Feng Yan, Kai Qi Shi, Haitao ZHAO, Yao Dong Wang

Research output: Chapter in Book/Conference proceedingConference contributionpeer-review

Abstract

Co-firing has been adopted as a major approach for the efficient use of biomass as an energy source in large scale for two decades. Such a practice contributes to the decarbonisation in power generation sector and therefore to the mitigation of CO2 emission. However, due to the differences in terms of thermal behaviors between biomass and coal, the co-firing of some biomasses with coal still presents many engineering problems, such as excessive fouling and slagging, which subsequently result in deteriorated boiler efficiency. The understanding of the transformation of minerals upon heating and how minerals originated in biomass affect ash fusion characteristics is of some significance for both design and operation purposes. In this study, low temperature ash (LTA) samples of biomass and coal were prepared and analyzed by using X-ray diffraction (XRD), scanning electron microscopy (SEM) coupled energy diffraction spectrum (EDS), the results of which were compared with their corresponding high temperature ash (HTA) samples. The transformation of minerals upon heating was therefore studied. The ash fusion characteristic temperatures of ash samples derived from different biomass and coal blends were investigated. The ash fusion characteristic temperatures show some additive behaviors.

Original languageEnglish
Title of host publicationCivil, Materials and Environmental Sciences
Pages249-253
Number of pages5
DOIs
Publication statusPublished - 2013
Event2013 International Conference on Civil, Materials and Environmental Sciences, CMES 2013 - Vancouver, Canada
Duration: 17 Apr 201318 Apr 2013

Publication series

NameAdvanced Materials Research
Volume742
ISSN (Print)1022-6680

Conference

Conference2013 International Conference on Civil, Materials and Environmental Sciences, CMES 2013
Country/TerritoryCanada
CityVancouver
Period17/04/1318/04/13

Keywords

  • Biomass
  • Co-firing
  • Mineral content
  • Transformation

ASJC Scopus subject areas

  • Engineering (all)

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