Influence of additives on potassium retention behaviors during straw combustion: A mechanism study

[Display omitted] •Potassium retention ratio (PRR) variations of wheat stalk (WS) ashes were investigated.•Influences of three additives (KL, JFA, ADP) on WS PRR were discussed.•The formations of K-Al/Fe silicates with KL or JFA prompted an increase in the WS mixture PRR.•ADP addition led to K-Ca/Mg...

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Published in:Bioresource technology 2020-03, Vol.299, p.122515-122515, Article 122515
Main Authors: Li, Fenghai, Wang, Xiaochuan, Zhao, Chaoyue, Li, Yang, Guo, Mingxi, Fan, Hongli, Guo, Qianqian, Fang, Yitian
Format: Article
Language:English
Subjects:
Additive
Coal
Coal Ash
Oxidizing atmosphere
Potassium
Potassium retention ratio
Silicates
Temperature
Variation mechanism
Wheat straw ashes
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cited_by cdi_FETCH-LOGICAL-c368t-98b88b895e8efc62608dd65e3c1c6867473865ef970be6c2380138661b90834b3
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container_start_page 122515
container_title Bioresource technology
container_volume 299
creator Li, Fenghai
Wang, Xiaochuan
Zhao, Chaoyue
Li, Yang
Guo, Mingxi
Fan, Hongli
Guo, Qianqian
Fang, Yitian
description [Display omitted] •Potassium retention ratio (PRR) variations of wheat stalk (WS) ashes were investigated.•Influences of three additives (KL, JFA, ADP) on WS PRR were discussed.•The formations of K-Al/Fe silicates with KL or JFA prompted an increase in the WS mixture PRR.•ADP addition led to K-Ca/Mg phosphate generations and caused their PRR increase. The potassium retention behaviors of wheat stalk and its modification mechanisms in an oxidizing atmosphere by three additives [kaolinite, fly ash from Jincheng coal fluidized-bed gasification (JFA), and ammonium dihydrogen phosphate (ADP)] were investigated. The potassium retention ratios (PRRs) increased with increasing additive mass ratio. The ADP was the optimal selection for wheat stalks combustion when the three additives at the same mass ratio because of its highest PRR and a slow decrease in PRR with an increase in temperature. With the increasing three additive mass ratios, the PRRs of their mixed ashes showed a similar trend [rapid increase (
doi_str_mv 10.1016/j.biortech.2019.122515
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The potassium retention behaviors of wheat stalk and its modification mechanisms in an oxidizing atmosphere by three additives [kaolinite, fly ash from Jincheng coal fluidized-bed gasification (JFA), and ammonium dihydrogen phosphate (ADP)] were investigated. The potassium retention ratios (PRRs) increased with increasing additive mass ratio. The ADP was the optimal selection for wheat stalks combustion when the three additives at the same mass ratio because of its highest PRR and a slow decrease in PRR with an increase in temperature. With the increasing three additive mass ratios, the PRRs of their mixed ashes showed a similar trend [rapid increase (&lt;12%) and then a slow increase (12%–15%)]. The mass ratios of three additives were all &lt;1.0% and their mixed ash reached an appropriate PRR. For kaolinite or JFA, the formations of K–Al/Fe silicates prompted an increase in the PRR. For ADP, K–Ca/Mg phosphate generations increased the PRR.</description><identifier>ISSN: 0960-8524</identifier><identifier>EISSN: 1873-2976</identifier><identifier>DOI: 10.1016/j.biortech.2019.122515</identifier><identifier>PMID: 31865152</identifier><language>eng</language><publisher>England: Elsevier Ltd</publisher><subject>Additive ; Coal ; Coal Ash ; Oxidizing atmosphere ; Potassium ; Potassium retention ratio ; Silicates ; Temperature ; Variation mechanism ; Wheat straw ashes</subject><ispartof>Bioresource technology, 2020-03, Vol.299, p.122515-122515, Article 122515</ispartof><rights>2019</rights><rights>Copyright © 2019. 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The potassium retention behaviors of wheat stalk and its modification mechanisms in an oxidizing atmosphere by three additives [kaolinite, fly ash from Jincheng coal fluidized-bed gasification (JFA), and ammonium dihydrogen phosphate (ADP)] were investigated. The potassium retention ratios (PRRs) increased with increasing additive mass ratio. The ADP was the optimal selection for wheat stalks combustion when the three additives at the same mass ratio because of its highest PRR and a slow decrease in PRR with an increase in temperature. With the increasing three additive mass ratios, the PRRs of their mixed ashes showed a similar trend [rapid increase (&lt;12%) and then a slow increase (12%–15%)]. The mass ratios of three additives were all &lt;1.0% and their mixed ash reached an appropriate PRR. For kaolinite or JFA, the formations of K–Al/Fe silicates prompted an increase in the PRR. 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The potassium retention behaviors of wheat stalk and its modification mechanisms in an oxidizing atmosphere by three additives [kaolinite, fly ash from Jincheng coal fluidized-bed gasification (JFA), and ammonium dihydrogen phosphate (ADP)] were investigated. The potassium retention ratios (PRRs) increased with increasing additive mass ratio. The ADP was the optimal selection for wheat stalks combustion when the three additives at the same mass ratio because of its highest PRR and a slow decrease in PRR with an increase in temperature. With the increasing three additive mass ratios, the PRRs of their mixed ashes showed a similar trend [rapid increase (&lt;12%) and then a slow increase (12%–15%)]. The mass ratios of three additives were all &lt;1.0% and their mixed ash reached an appropriate PRR. For kaolinite or JFA, the formations of K–Al/Fe silicates prompted an increase in the PRR. 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subjects Additive
Coal
Coal Ash
Oxidizing atmosphere
Potassium
Potassium retention ratio
Silicates
Temperature
Variation mechanism
Wheat straw ashes
title Influence of additives on potassium retention behaviors during straw combustion: A mechanism study
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