Torrefaction of cultivation residue of Auricularia auricula-judae to obtain biochar with enhanced fuel properties

Zhang, Yan; Yao, Aiying; Song, Kuiyan

doi:10.1016/j.biortech.2016.01.099

Cited by 34 publications

(9 citation statements)

References 31 publications

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“…With the increase of temperature, the crystallinity index decreased slightly from 43.60% to 42.79%, which indicated that the partial hydrogen bonding was destroyed and the macromolecular chain was broken (Zhang et al 2016c). With a further increase in temperature, the crystallinity index increased rapidly to 44.07% (230 °C).…”

Section: Xrd Analysismentioning

confidence: 76%

Effect of the Torrefaction Temperature on the Structural Properties and Pyrolysis Behavior of Biomass

Zheng¹,

Tao²,

Yang³

et al. 2017

BioResources

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To improve prospects for high-value utilization of biomass, torrefaction pretreatments were conducted at 210, 230, 250, 270, and 300 °C with a reaction time of 30 min. The pyrolysis of torrefied biomass was also performed on a fixed-bed reactor system at 450 °C. The effect of torrefaction temperature on the yield, energy yield, structure, physicalchemical characteristics, and production composition of bio-oil was studied. The torrefaction pretreatment improved the fuel characteristics of pyrolysis products. When the torrefaction temperature was increased, the -OH and C=O contents decreased, the C=C contents increased, the pyrolysis peak temperature decreased, the residual carbon contents noticeably increased, and the Ea value remained in the range of 69 to 129 kJmol -1. The pore volume increased and the crystallinity index decreased due to degradation and recrystallization. The solid yield of pyrolysis biomass decreased sharply in contrast to the liquid yield. When the torrefaction temperature increased, the bio-oil yield decreased from 36.82 wt.% to 20.13 wt.%. The phenol content in the bio-oil markedly increased; however, oxygen-containing compounds such as acids, sugars, and furans, significantly decreased, which indicated that torrefaction pretreatment efficiently improved the quality of the fuel.

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Section: Xrd Analysismentioning

confidence: 76%

Effect of the Torrefaction Temperature on the Structural Properties and Pyrolysis Behavior of Biomass

Zheng¹,

Tao²,

Yang³

et al. 2017

BioResources

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“…7. Several authors used this correlation in other torrefaction studies, due to its accuracy (R 2 = 0.935) (Ibrahim et al 2013;Wilk et al 2015;Zhang et al 2016).…”

Section: Lower Heating Valuementioning

confidence: 99%

Physicochemical Characterization of Torrefied Wood Biomass under Air as Oxidizing Atmosphere

Ramos-Carmona¹,

Delgado-Balcázar²,

Pérez³

2017

BioResources

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The effects of torrefaction under an oxidizing atmosphere on the physicochemical properties of patula pine wood chips were studied. Raw and torrefied pine were characterized to evaluate the effect of temperature and residence time on biofuel properties, such as bulk density, equivalent Hardgrove grindability index (HGIeq), ultimate and proximate analyses, heating value, and fuel value index (FVI). In contrast, the torrefaction process was characterized by mass and energy yields, and by the energymass co-benefit index (EMCI). Torrefaction was performed in a rotary kiln at temperatures between 180 °C and 240 °C during residence times between 30 min and 120 min. The torrefaction process under an oxidizing atmosphere tended to increase the fixed carbon/volatile matter ratio (from 0.19 to 2.5), while the H/C and O/C atomic ratios decreased 73% and 55%, respectively. The best properties of wood reached in the experimental plan were obtained at 210 °C during 75 min. For this torrefaction condition, energy yield, FVI, and EMCI were 85.91%, 1.91 MJ/cm 3 , and 4.41%, respectively. Additionally, the lower heating value for torrefied pine (18.65 MJ/kg) was higher than for the raw material (17.76 MJ/kg), and the HGIeq was 17% greater, which resulted in a better grindability behavior.

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“…The transformation technologies that are conductive to consuming biomass can be divided into three major groups: direct combustion routes, thermochemical routes (such as the transformation of biomass using steam gasification) and biochemical routes [ 4 ]. Biomass pellets as an important substitution of fossil fuels [ 5 , 6 , 7 ], which is widely used in industrial power generation and household cooking, will bring the benefits in environmental-friendly and economic aspects.…”

Section: Introductionmentioning

confidence: 99%

A Method of Adding Binder by High-Pressure Spraying to Improve the Biomass Densification

Zhang

Chen

et al. 2020

Polymers

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In order to cut down the usage amount of binder, mix it more evenly with the biomass raw materials and improve the quality of pellets in the densification process, this study explored the feasibility of promoting the densification of biomass by using a high-pressure spraying method to add liquid binder. In the study, a high-pressure sprayer was used to spray saturated brown sugar water into sawdust for densification tests. A three-factor orthogonal experiment was designed to analyze the physical characteristics of the pellets under different variables. Through analysis of range and multiple linear regression, the effect curve was drawn to analyze the impact of the high-pressure spraying method on densification. The results showed that under low compaction pressure of 14.9 MPa, the raw materials with adding 6% saturated brown sugar water can be densified into pellets, while the raw materials without binder cannot. Moreover, compared with the method of adding binder by stirring, the high-pressure spraying method obtained the pellets with fewer cracks on the surface and increased the relaxation density of pellets by 8.65%. Under high compaction pressure (75, 100, 124 and 149 MPa), the high-pressure spraying method has a significant effect on increasing the relaxation density, not only on the compressive strength.

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Torrefaction of cultivation residue of Auricularia auricula-judae to obtain biochar with enhanced fuel properties

Cited by 34 publications

References 31 publications

Effect of the Torrefaction Temperature on the Structural Properties and Pyrolysis Behavior of Biomass

Effect of the Torrefaction Temperature on the Structural Properties and Pyrolysis Behavior of Biomass

Physicochemical Characterization of Torrefied Wood Biomass under Air as Oxidizing Atmosphere

A Method of Adding Binder by High-Pressure Spraying to Improve the Biomass Densification

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