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Combustion characteristics of barley straw stored with CaCO3 during fluidized bed combustion using quartz and olivine as bed materials

Bozaghian, Marjan and Rebbling, Anders and Larsson, Sylvia and Xiong, Shaojun and Skoglund, Nils (2017). Combustion characteristics of barley straw stored with CaCO3 during fluidized bed combustion using quartz and olivine as bed materials. I/In: 5th Central European Biomass Conference, 18-20 January, 2017, Graz, Austria.
[Conference Paper]

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Abstract

In order to achieve a continuous feedstock supply for power plants a large quantity of harvested material must be stored for long-term periods. During storage, especially during right conditions of temperature, moisture and oxygen, solid agricultural fuels are susceptible to microbial activities. Microbial respiration not only leads to loss of organic carbon, but also to an increased temperature in the stored fuel which may lead to self-ignition.
There is on-going work studying the effect of adding Ca as CaO or CaCO3 during storage of straw with the aim of creating an unfavorable alkaline microenvironment that prevents microbial growth during storage. The effect of this amendment during storage is still being explored, but the effect in the combustion step of the process in terms of determining the potential of Ca-additives to positively affect overall ash chemistry have yet to be certainly quantified.
Utilization of agricultural crops for energy purposes in heat and power plants has proven to be challenging in numerous ways. Compared to woody fuels, agricultural fuels can cause severe ash-related operational problems in combined heat and power plants through by fouling, slagging and/or bed agglomeration due to their high concentrations of inorganic constituents.
The objective of the present study is therefore to determine the fouling and bed agglomeration characteristics during fluidized-bed combustion of barley straw stored with different dosages of Ca to biomass with the main ash-forming elements shown in Figure 1, using two types of bed materials, quartz and olivine.

Authors/Creators:Bozaghian, Marjan and Rebbling, Anders and Larsson, Sylvia and Xiong, Shaojun and Skoglund, Nils
Title:Combustion characteristics of barley straw stored with CaCO3 during fluidized bed combustion using quartz and olivine as bed materials
Year of publishing :2017
Page range:1
Number of Pages:1
Publisher:Swedish University of Agricultural Sciences, SLU, 5th Central European Biomass Conference
Language:English
Publication Type:Conference Paper (Poster)
Refereed:No
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
(A) Swedish standard research categories 2011 > 1 Natural sciences > 104 Chemical Sciences > Inorganic Chemistry
(A) Swedish standard research categories 2011 > 2 Engineering and Technology > 209 Industrial Biotechnology > Bioenergy
Keywords:barley, storage, energy crops
URN:NBN:urn:nbn:se:slu:epsilon-e-5028
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-5028
ID Code:15204
Faculty:S - Faculty of Forest Sciences
Department:(S) > Department of Forest Biomaterials and Technology (from 131204)
Deposited By: SLUpub Connector
Deposited On:01 Oct 2018 09:36
Metadata Last Modified:01 Oct 2018 09:38

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