Co-combustion of Agricultural Straw with Municipal Sewage Sludge in a Fluidized Bed: Role of Phosphorus in Potassium Behavior

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	Co-combustion of Agricultural Straw with Municipal Sewage Sludge in a Fluidized Bed: Role of Phosphorus in Potassium Behavior
	Ren, Qiangqiang; Li, Linna
刊名	ENERGY & FUELS
	2015-07-01
卷号	29 期号:7 页码:4321-4327
英文摘要	The influence of municipal sewage sludge addition on the agglomeration characteristic during straw combustion in a fluidized bed was investigated in a bubbling fluidized-bed reactor (5 kWth) with quartz sand as the bed material. In addition, chemical reactions between the alkali metal and three kinds of phosphorus-containing model compounds were studied to investigate the effect of phosphorus on the behavior of the alkali metal during wheat straw combustion. The element contents, the crystalline phases, the morphology, and the elemental composition in the residual ash samples from the combustion experiments were characterized by X-ray fluorescence (XRF), X-ray diffraction (XRD), and scanning electron microscopy (SEM), respectively. The results show that the agglomeration tendency decreases and the defluidization time is prolonged during co-combustion of municipal sewage sludge and wheat straw. The addition of municipal sewage sludge in wheat straw leads to the formation of alkali-rich phosphate silicate that restrains the reaction between the alkali and quartz sand. XRD results exhibit that, besides aluminum, phosphorus in the municipal sewage sludge can react with the potassium in both fly ash and bottom ash to form compounds with a high melting temperature. Reactions between the phosphorus-rich additive and alkali metal in wheat straw lead to the formation of K-Ca-P compounds. The formation of alkali phosphates reveals the capturing mechanism of the potassium phosphate during combustion of the blend of municipal sewage sludge and wheat straw.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Energy & Fuels ; Engineering, Chemical
研究领域[WOS]	Energy & Fuels ; Engineering
关键词[WOS]	CHLORINE DEPOSITION ; ASH DEPOSITION ; ALKALI VAPORS ; WHEAT-STRAW ; CFB BOILER ; BIOMASS ; COMBUSTION ; CORROSION ; FUEL ; COAL
收录类别	SCI
语种	英语
WOS记录号	WOS:000360026900035
公开日期	2015-12-22
内容类型	期刊论文
源URL	[http://ir.etp.ac.cn/handle/311046/98957]
专题	工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI）
作者单位	Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Ren, Qiangqiang,Li, Linna. Co-combustion of Agricultural Straw with Municipal Sewage Sludge in a Fluidized Bed: Role of Phosphorus in Potassium Behavior[J]. ENERGY & FUELS,2015,29(7):4321-4327.
APA	Ren, Qiangqiang,&Li, Linna.(2015).Co-combustion of Agricultural Straw with Municipal Sewage Sludge in a Fluidized Bed: Role of Phosphorus in Potassium Behavior.ENERGY & FUELS,29(7),4321-4327.
MLA	Ren, Qiangqiang,et al."Co-combustion of Agricultural Straw with Municipal Sewage Sludge in a Fluidized Bed: Role of Phosphorus in Potassium Behavior".ENERGY & FUELS 29.7(2015):4321-4327.