Fast Pyrolysis of Pine Sawdust in a Fluidized-Bed Reactor

DeSisto, William J.; Hill, N. P.; Beis, Sedat H.; Mukkamala, Saikrishna; Joseph, Jincy; Baker, Cirila; Ong, Ta‐Hsuan; Stemmler, Elizabeth A.; Wheeler, M. Clayton; Frederick, B.G.; Heiningen, Adriaan van

doi:10.1021/ef901120h

Cited by 123 publications

(117 citation statements)

References 33 publications

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“…The pulverized bio-char had higher fixed carbon content (88.89% at 700 °C).The fine particle size let the heat transfer much easily, thus making the pyrolysis of pulverized bio-char more complete. In other studies (DeSisto et al 2010;Amutio et al 2012;Ronsse et al 2013), the fixed carbon content showed the same trend with slightly different values. These analyses showed that pyrolysis is an impurity removal process.…”

Section: Proximate Analysismentioning

confidence: 51%

“…Other species of bio-char show the same trend (Ronsse et al 2013;Guo and Bi 2015), but different kinds of biomass are quite different in ash content. The ash content of pulverized bio-char was much lower than that in the molded form, which is similar to pulverized sawdust bio-char (DeSisto et al 2010;Amutio et al 2012;Ronsse et al 2013). In briquette process, the volatiles in lignin and hemicelluloses would become slightly reduced.…”

Section: Proximate Analysismentioning

confidence: 72%

“…Compared with other bio-chars (DeSisto et al 2010;Amutio et al 2012), the surface area of molded bio-char was higher, which could be due to molded biomass' high volatile content, low ash content (Table 1), and organized structure. …”

Section: Bet Surface Areasmentioning

confidence: 93%

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Effects of Temperature and Heating Rate on the Characteristics of Molded Bio-char

Li¹,

Liu²,

Wang³

et al. 2016

BioResources

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A slow pyrolysis of pinewood was investigated in this paper. Through the briquette process, the pinewood sawdust becomes molded biomass. The molded bio-char was produced from molded biomass with different pyrolysis factors, and the bio-char's heating value, char yield rates, and physicochemical and morphological properties were investigated. Molded bio-char's characteristics depended principally on pyrolysis factors. At low temperature (400 °C), the char yield rate was positively correlated to the heating rate. But at higher temperatures (500 to 700 °C), the char yield rates decreased as heating rates increased. As pyrolysis temperature increased from 400 to 700 °C, the following increased in molded bio-char: fixed-carbon content, percentage carbon, heating value, ash content, as well as surface areas. And its pore structure, graphite degree, and polymerization degree achieved a higher level. Compared with pulverized bio-char, the molded bio-char had a higher char yield rate, ash content, graphite degree, and structure ordering. The molded bio-char obtained from a low temperature (400 °C) and high heating rate (15 °C/min) can be used as a reducing agent, the molded bio-char from 600 °C is recommend as an activated carbon precursor, and the molded bio-chars from low temperature (400 °C) have a higher efficiency as fuel.

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Section: Proximate Analysismentioning

confidence: 51%

Section: Proximate Analysismentioning

confidence: 72%

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Effects of Temperature and Heating Rate on the Characteristics of Molded Bio-char

Li¹,

Liu²,

Wang³

et al. 2016

BioResources

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“…Other names used for these types of setups are: screen-heater, captive sample reactor, wire net apparatus and heated grid reactor. Different types of feedstock (coal [19][20][21][22][23][24][25][26][27][28][29][30] , plastic 31 , cellulose 14,32,33 , lignin 34,35 , and biomass ) were (hydro) pyrolyzed/combusted. An overview of wire-mesh reactors used to study the fast pyrolysis process of biomass/model compounds is listed in Table 2.1 and will be discussed briefly.…”

Section: Overview Wire-mesh Reactorsmentioning

confidence: 99%

“…HPLC analyses were carried out to qualify the sugars (Agilent 1200 serie, PL Hi-PlexH (300•7.7 mm, part no PL 1170-6830) 65 0 C, RID (55 0 C); 0.6 ml/min 5mM H 2 SO 4 ). 1-H-NMR (chapter 2)6 spectra were interpreted by the classification in functional groups as suggested by Ingram et al 35 .…”

Section: Oilmentioning

confidence: 99%

Fast pyrolysis of biomass

Hoekstra¹

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Preparation of Biomass Char for Ironmaking and Its Reactivity

Zhang

et al. 2012

Ceramic Transactions Series

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Due to a large consumption of coal and coke, ironmaking process gives off huge quantities of waste gas into the air, such as carbon dioxide and sulfur dioxide. Therefore, biomass is supposed to be used in ironmaking process to partially replace metallurgical coal and coke for energy-saving and emission-cutting. As raw biomass is not suitable for ironmaking, pretreatment of biomass is needed. Laboratorial preparation of biomass char, suitable for industrial application, is carried out and proper preparation conditions of biochar are presented. And then, properties of biochar, especially its reactivity, are also investigated. It was concluded that biomass char is a kind of solid fuel with high reactivity and high purity, applicable to substitute for fossil fuels in ironmaking. INTRODUCTIONA large quantity of carbon resources, coal and coke, are consumed in ironmaking process to supply heat and reducing agent, causing serious environmental problems and resource crisis. In conventional ironmaking process, about 500 kg of fossil carbon would be consumed to produce one ton of steel, and nearly 2 tons of CO2 and other emissions would be emitted into the air simultaneously 1 . Biomass, carbon rich and carbon neutral, therefore, is getting more and more attention as a kind of renewable and clean energy in ironmaking process 2 " 3 . For example, Ueda S. et al had tried to add new burden with biomass char into the blast furnace to achieve low reducing agent operation and mitigate CO2 emission 4 " 5 . Besides, some researchers attempted to utilizing biomass in coke making, iron ore sintering and blast furnace auxiliary injection 6 " 8 .Theoretically, all of the energy used in carbon-based ironmaking could be replaced by biomass carbon except the essential coke for large blast furnaces 9 "'°. But in practice only a few steel plants use biomass to produce hot metal (for example, there are small blast furnaces in Brazil which use charcoal as reducing agent). The main reason is that raw biomass is not suitable for direct use in industry due to its high moisture content, poor grindability, low energy density and low bulk density, and consequently the pretreatment of raw biomass is indispensable".As a kind of attractive renewable energy with a promising prospect, the carbonization and pyrolysis of lots of raw biomass materials were studied by many researchers around the world with a long history 12 " 13 . However, previous research about the utilization of biomass is almost centered on its combustion, gasification and pyrolysis for power generation or chemicals' production, and little information is about preparing biomass char for ironmaking. In this article, the optimum condition (heating pattern, carbonization temperature and holding time) for producing biochar from biomass was suggested through a series of carbonizing experiments. Furthermore, effect of carbonizing condition of biomass on the reactivity of derived biochar with CO2 was investigated.

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Fast Pyrolysis of Pine Sawdust in a Fluidized-Bed Reactor

Cited by 123 publications

References 33 publications

Effects of Temperature and Heating Rate on the Characteristics of Molded Bio-char

Effects of Temperature and Heating Rate on the Characteristics of Molded Bio-char

Fast pyrolysis of biomass

Preparation of Biomass Char for Ironmaking and Its Reactivity

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