STRAW COMBUSTION IN CIRCULATING FLUIDIZED BED AT LOW-TEMPERATURE: TRANSFORMATION AND DISTRIBUTION OF POTASSIUM

CORC > 青岛生物能源与过程研究所 > 中国科学院青岛生物能源与过程研究所 > 热化学转化事业部

	STRAW COMBUSTION IN CIRCULATING FLUIDIZED BED AT LOW-TEMPERATURE: TRANSFORMATION AND DISTRIBUTION OF POTASSIUM
	Yu, Chunjiang 1; Qin, Jianguang 1,2; Xu, Jing 3; Nie, Hu 1; Luo, Zhongyang 1; Cen, Kefa 1
刊名	CANADIAN JOURNAL OF CHEMICAL ENGINEERING
	2010-10-01
卷号	88 期号:5 页码:874-880
关键词	biomass straw combustion potassium transformation CFB
中文摘要	Potassium in straw is relatively high and exists mainly as readily available potassium (K(r)). The release and transformation of the K(r) during biomass combustion mean a decrease or loss of potash fertiliser value. The purpose of this work is to quantify the transformation and the distribution of the K(r) under conditions that can obviously reduce the loss of it, and then to try to offer some suggestions for new biomass projects. A pilot-scale circulating fluidized bed (CFB) combustor (0.5 MW(th)) has been applied to combust rice straw. The combustion temperature was kept at a low level (lower than 700 degrees C) to reduce the transformation of potassium. The K(r) and the total potassium (K(t)) in the rice straw, the bottom ash, and the flyash were determined after chemical fractionation and wet acid digestion, respectively. The mass balance of the biomass ash, the K(r) and the K(t) in stable operation were quantified. The experimental results showed that the flyash accounted for more than 95% of the total straw ash. The flyash contained around 92% of the K(t) and 86% of the K(r) of the straw. In the flyash about 3% of the K(r) of straw was transformed to unavailable potassium (K(u)) during combustion. On the basis of the obtained results, four suggestions that reduce the loss of the K(r) are given for the better development of biomass-fired power plants.
英文摘要	Potassium in straw is relatively high and exists mainly as readily available potassium (K(r)). The release and transformation of the K(r) during biomass combustion mean a decrease or loss of potash fertiliser value. The purpose of this work is to quantify the transformation and the distribution of the K(r) under conditions that can obviously reduce the loss of it, and then to try to offer some suggestions for new biomass projects. A pilot-scale circulating fluidized bed (CFB) combustor (0.5 MW(th)) has been applied to combust rice straw. The combustion temperature was kept at a low level (lower than 700 degrees C) to reduce the transformation of potassium. The K(r) and the total potassium (K(t)) in the rice straw, the bottom ash, and the flyash were determined after chemical fractionation and wet acid digestion, respectively. The mass balance of the biomass ash, the K(r) and the K(t) in stable operation were quantified. The experimental results showed that the flyash accounted for more than 95% of the total straw ash. The flyash contained around 92% of the K(t) and 86% of the K(r) of the straw. In the flyash about 3% of the K(r) of straw was transformed to unavailable potassium (K(u)) during combustion. On the basis of the obtained results, four suggestions that reduce the loss of the K(r) are given for the better development of biomass-fired power plants.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Chemical
研究领域[WOS]	Engineering
关键词[WOS]	INORGANIC ELEMENTS ; BIOMASS ; AGGLOMERATION ; RELEASE ; BEHAVIOR ; BOILERS ; ASH
收录类别	SCI
语种	英语
WOS记录号	WOS:000282667400020
公开日期	2011-09-09
内容类型	期刊论文
源URL	[http://ir.qibebt.ac.cn//handle/337004/612]
专题	青岛生物能源与过程研究所_热化学转化事业部
作者单位	1.Zhejiang Univ, State Key Lab Clean Energy Utilizat, Hangzhou 310027, Zhejiang, Peoples R China 2.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Shandong, Peoples R China 3.Univ Western Ontario, Dept Chem & Biochem Engn, London, ON N6A 5B9, Canada
推荐引用方式 GB/T 7714	Yu, Chunjiang,Qin, Jianguang,Xu, Jing,et al. STRAW COMBUSTION IN CIRCULATING FLUIDIZED BED AT LOW-TEMPERATURE: TRANSFORMATION AND DISTRIBUTION OF POTASSIUM[J]. CANADIAN JOURNAL OF CHEMICAL ENGINEERING,2010,88(5):874-880.
APA	Yu, Chunjiang,Qin, Jianguang,Xu, Jing,Nie, Hu,Luo, Zhongyang,&Cen, Kefa.(2010).STRAW COMBUSTION IN CIRCULATING FLUIDIZED BED AT LOW-TEMPERATURE: TRANSFORMATION AND DISTRIBUTION OF POTASSIUM.CANADIAN JOURNAL OF CHEMICAL ENGINEERING,88(5),874-880.
MLA	Yu, Chunjiang,et al."STRAW COMBUSTION IN CIRCULATING FLUIDIZED BED AT LOW-TEMPERATURE: TRANSFORMATION AND DISTRIBUTION OF POTASSIUM".CANADIAN JOURNAL OF CHEMICAL ENGINEERING 88.5(2010):874-880.