New Fuel BCDF (Bio-Carbonized-Densified-Fuel)The Effect of Semi-Carbonization

Honjo, Tsuyoshi; Fuchihata, Manabu; Ida, Tamio; Sano, Hiroshi

doi:10.1016/b978-008044276-1/50222-1

Cited by 5 publications

(3 citation statements)

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“…After 6 MPa, the compression does not affect the final biochar mass. Although the change on the trend in the mass yield in this study is the opposite of that reported by , it follows the results reported by Honjo et al (2003). Honjo et al (2003) reported that the increase in compressive load of 8.4 to 24.5 MPa at 270°C gave a reduction of about 9% in the mass yield of Japanese cypress-derived biochar.…”

Section: Composition and Yieldssupporting

confidence: 79%

“…Although the change on the trend in the mass yield in this study is the opposite of that reported by , it follows the results reported by Honjo et al (2003). Honjo et al (2003) reported that the increase in compressive load of 8.4 to 24.5 MPa at 270°C gave a reduction of about 9% in the mass yield of Japanese cypress-derived biochar. Agar et al (2016) also found that the mass yield of biochars prepared from aspen and beech decreased by about 8% under a compressed nitrogen atmosphere from 0.1 to 2.1 MPa.…”

Section: Composition and Yieldssupporting

confidence: 79%

“…On the other hand, Xiao et al (2015) reported that the application of mechanical compression to rice straw during the torrefaction in an inert atmosphere was able to provide biochars with greater mass yields, but gave lower energy yields compared to those prepared by gas pressurization. Honjo et al (2003) prepared the biochar by mechanically compressing douglas fir sawdust at 8.4-24.5 MPa and then heating at 200-270°C. They found that the mass yield decreased slightly at 200°C and then decreased significantly at 270°C.…”

Section: Introductionmentioning

confidence: 99%

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Torrefaction Characteristics of Japanese Cedar Sawdust with a Mechanical Compression in Air Atmosphere

Fernanda

Kawahara

Higashi

et al. 2019

J. Chem. Eng. Japan

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In this study, biochars were prepared from Japanese cedar sawdust with a mechanical compression at di erent temperatures in an air atmosphere. The compression pressure at a given constant value was applied to the raw material during the torrefaction process. Experimental results indicated that the compression positively improved the fuel properties of the biochar obtained. The carbon content in biochar increased; whereas the oxygen and hydrogen contents decreased. The H/C ratio of biochar was generally proportional to its O/C ratio, and biochars prepared at temperatures of more than 300°C were in proximity to bituminous or sub-bituminous coals in the van Krevelen diagram. Torrefaction at 300°C and 3 MPa gave biochar with a higher heating value of 29.8 MJ/kg and an energy yield of 0.85. Furthermore, the di erential thermal analyses showed that the peaks corresponding to the release of volatile matters from biochar decreased with an increase in the compressive load. Consequently, torrefaction of Japanese cedar sawdust with compression in an air atmosphere would be a promising method to produce biochars as an alternative fuel.

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Section: Composition and Yieldssupporting

confidence: 79%