Reed-based biochar production in a fluidized bed pyrolysis reactor

被引：0

作者：

Shahin F.A. ^{[1
]}

Abbassi B.E. ^{[1
]}

Rudra R.P. ^{[1
]}

机构：

[1] School of Engineering, University of Guelph, 50 Stone Road E, Guelph, N1G 2W1, ON

来源：

Journal of Solid Waste Technology and Management | 2018年 / 44卷 / 04期

关键词：

Adsorption; Biochar; Carbonization; Phragmites australis; Pyrolysis;

D O I：

10.5276/JSWTM.2018.303

中图分类号：

学科分类号：

摘要：

Reed plants are abundantly available in most wetland areas around the world. Due to their high carbon content, reed plants have high potential as a suitable precursor for biochar production. In this investigation, phragmites australis reed plant was collected, prepared and used to produce biochar at different pyrolysis/carbonization temperatures (500, 600, 700, 800 and 900 °C) and times (15, 30, 60, 90 and 120 min.). Pyrolysis was carried out under an inert atmosphere using a fluidized bed reactor, the minimum fluidization velocity was found to be 50 mL/min. The experimental system consists of a vertical electrical muffle furnace and a Ushape reactor made of a 316-grade stainless steel tube. The effects of pyrolysis temperature and time on both yield and quality of the product were studied. The quality of the reed derived biochar was measured in terms of iodine number which provides information on the adsorption characteristics of the biochar. Further characterization such as proximate and ultimate analysis as well as yield at different carbonization temperatures and times were investigated using a CHN microanalyzer and a thermogravimetric analyzer (TGA). The surface morphology and porosity of the produced biochar were investigated using a scanning electron microscope (SEM). It has been shown that biochar yield decreased with increased temperature, indicating increased devolatilization of the raw feedstock. The results also showed that carbonization yield was nearly constant above 700 °C. Furthermore, no further carbonization occurred at times greater than 60 min. To determine the adsorption capacity of the carbonized material, biochar was tested using the iodine adsorption method. The highest adsorption capacity of 193.7 mg/g was obtained at 900 °C and 60 min. © 2018 Widener University School of Civil Engineering. All Rights Reserved.

引用

页码：303 / 310

页数：7

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