Combined pretreatment with torrefaction and washing using torrefaction liquid products to yield upgraded biomass and pyrolysis products

Chen, Dengyu; Mei, Jiaming; Li, Haiping; Li, Yiming; Lu, Mengting; Ma, Tingting; Ma, Zhongqing

doi:10.1016/j.biortech.2016.12.088

Cited by 201 publications

(57 citation statements)

References 30 publications

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“…Torrefaction products could be investigated for upgrading the biomass pyrolysis products. It could improve the properties of fuel while increasing metal contents of sample, and it was reported that water and acid content was reduced while increasing phenol content of bio‐oil , …”

Section: Introductionmentioning

confidence: 99%

“…It could improve the properties of fuel while increasing metal contents of sample, and it was reported Nomenclature: HHV, higher heating value (MJ kg −1 ); H/C, hydrogen per carbon ratio (−); O/C, oxygen per carbon ratio (−); m, mass (g); EDR, energy densification ratio (−); T, temperature (°C); t, residence time (min); Bd, bulk density (kg m −3 ); db, dry basis (−); N, nitrogen (%); VM, volatile matter (%); FC, fixed carbon (%); M, moisture content (%) that water and acid content was reduced while increasing phenol content of bio-oil. [6][7][8]9 The most important difference between torrefaction process and other thermal processes is the slow heating rate. In the process, minimum volatile loss and maximum production of solid fuel are aimed by ensuring removal of moisture and breaking of hydrogen bonds with the effect of temperature.…”

Section: Introductionmentioning

confidence: 99%

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Upgrading lignocellulosic waste to fuel by torrefaction: Characterisation and process optimization by response surface methodology

Kutlu

Koçar

2018

Int J Energy Res

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Summary Torrefied biomass is a commercial fuel, which is particularly produced from woody biomass via torrefaction and alternative to coal to reduce greenhouse gas emissions in the short term. In this study, torrefaction conditions of cotton stalk were optimised, and the effect of bulk density together with temperature and residence time on process yields and characterisation of torrefied cotton stalk was investigated. Response surface methodology using Box‐Behnken design was employed for the design of experiments and optimization. Cotton stalk was torrefied at a temperature between 260°C and 320°C, in 10, 35, and 60 minutes with bulk density of 125, 150, and 175 kgm−3. Temperature was the most effective parameter for the six responses (higher heating value, carbon content, hydrogen/carbon and oxygen/carbon ratios, mass loss, and energy yield). Besides, temperature/bulk density interaction was found to be significant for all responses whereas residence time/bulk density interaction was effective for process yields. The optimization results showed that more economical torrefied biomass with similar quality of lignite could also be produced under process conditions of 305°C‐32 minutes‐158 kgm−3. At this point, higher heating value and carbon content of product were calculated as 19.7 MJ kg−1 and 64%, respectively.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Upgrading lignocellulosic waste to fuel by torrefaction: Characterisation and process optimization by response surface methodology

Kutlu

Koçar

2018

Int J Energy Res

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“…Biomass pyrolysis is a thermochemical degradation process operating in an inert or very low stoichiometric oxygen atmosphere that converts solid biomass into three phase products, namely gaseous (combustible gas), liquid (bio-oil), and solid (bio-char) products (Yang et al 2016;Chen et al 2017aChen et al , 2017b. Compared to fast pyrolysis with a fast heating rate (generally over 300 °C/min) and short residence time (0.5 s to 10 s), the main product of slow pyrolysis with a moderate heating rate of 1 °C/min to 30 °C/min was the solid bio-char instead of the liquid bio-oil (Duman et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Physicochemical Characteristics of Bio-char Pyrolyzed from Moso Bamboo and Rice Husk with Different Pyrolysis Temperatures

Zhang¹,

Ma²,

Zhang³

et al. 2017

BioResources

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Bio-char pyrolyzed from biomass waste has been notably applied in various industries due to its versatile physicochemical characteristics. This paper investigated the difference of the properties of the bio-char derived from moso bamboo and rice husk under different pyrolysis temperatures (200 °C to 800 °C). As the temperature increased, the biochar yield for both bamboo bio-char (BC) and rice husk bio-char (RHC) decreased, while the carbon element content and fixed carbon, the value of higher heating value (HHV) and pH increased for both BC and RHC. At 800 °C, BC had a higher HHV of 32.78 MJ/kg than RHC of 19.22 MJ/kg, while RHC had a higher yield of char (42.99 wt.%) than BC (26.3 wt.%) because of the higher ash content (47.51 wt.%) in RHC. SiO2 was the dominant component in the ash of RHC, accounting for 86.26 wt.%. The surface area (SBET) of RHC (331.23 m 2 /g) was higher than BC (259.89 m 2 /g). However, the graphitization degree of BC was higher than RHC at the same temperature. The systematic study on the evolution of the basic properties of BC and RHC will provide a good reference for their high value-added application.

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“…Cirrhosis data were sometimes inconsistent between the various sources for an individual patient. To overcome this variation, we implemented the following hierarchical classification algorithm to identify cirrhosis: (i) decompensated cirrhosis identified using our validated Classification and Regression Tree model; (ii) F4 liver biopsy or Fibroscan >12.5; (iii) FIB4 > 5.88; and (iv) the presence of ICD9/10 diagnosis codes for cirrhosis.…”

Section: Methodsmentioning

confidence: 99%

Impact of sustained virologic response on risk of type 2 diabetes among hepatitis C patients in the United States

Zhang

Gordon

et al. 2018

Journal of Viral Hepatitis

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Data regarding the impact of hepatitis C (HCV) therapy on incidence of type 2 diabetes mellitus are limited. We used the data from the longitudinal Chronic Hepatitis Cohort Study-drawn from four large US health systems-to investigate how response to HCV treatment impacts the risk of subsequent diabetes. Among HCV patients without a history of type 2 diabetes mellitus or hepatitis B, we investigated the incidence of type 2 diabetes from 12 weeks post-HCV treatment through December 2015. Cox proportional hazards models were used to test the effect of treatment status (sustained virologic response [SVR] or treatment failure) and baseline risk factors on the development of diabetes, considering any possible risk factor-by-SVR interactions, and death as a competing risk. Among 5127 patients with an average follow-up of 3.7 years, diabetes incidence was significantly lower among patients who achieved SVR (231/3748; 6.2%) than among patients with treatment failure (299/1379; 21.7%; adjusted hazard ratio [aHR] = 0.79; 95% CI: 0.65-0.96). Risk of diabetes was higher among African American and Asian American patients than White patients (aHR = 1.82 and 1.75, respectively; P < .05), and among Hispanic patients than non-Hispanics (aHR = 1.86). Patients with BMI ≥ 30 and 25-30 (demonstrated higher risk of diabetes aHR = 3.62 and 1.72, respectively; P < .05) than those with BMI < 25; patients with cirrhosis at baseline had higher risk than those without cirrhosis (aHR = 1.47). Among a large US cohort of patients treated for HCV, patients who achieved SVR demonstrated a substantially lower risk for the development of type 2 diabetes mellitus than patients with treatment failure.

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Combined pretreatment with torrefaction and washing using torrefaction liquid products to yield upgraded biomass and pyrolysis products

Cited by 201 publications

References 30 publications

Upgrading lignocellulosic waste to fuel by torrefaction: Characterisation and process optimization by response surface methodology

Upgrading lignocellulosic waste to fuel by torrefaction: Characterisation and process optimization by response surface methodology

Comparison of the Physicochemical Characteristics of Bio-char Pyrolyzed from Moso Bamboo and Rice Husk with Different Pyrolysis Temperatures

Impact of sustained virologic response on risk of type 2 diabetes among hepatitis C patients in the United States

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