Co-pyrolysis and co-hydrothermal liquefaction of seaweeds and rice husk: Comparative study towards enhanced biofuel production

Hu, Yamin; Wang, Shuang; Li, Jiancheng; Wang, Qian; He, Zhixia; Feng, Yongqiang; Abomohra, Abd El‐Fatah; Afonaa-Mensah, Stephen; Hui, Chi Wai

doi:10.1016/j.jaap.2017.11.016

Cited by 80 publications

(30 citation statements)

References 57 publications

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“…However, drying also significantly concentrates the dry matter and the energy content of the biomass as a mild torrefaction step. The moisture content of the biomass plays a vital role in the stability of the produced bio-oil [24]. The high water content of the crude bio-oil results in phase separation, which is a handicap for fuel applications [25].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Infrared Radiation Combined with Hot Air Convection for Energy-Efficient Drying of Biomass

et al. 2019

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Cost-effective biomass drying is a key challenge for energy recovery from biomass by direct combustion, gasification, and pyrolysis. The aim of the present study was to optimize the process of biomass drying using hot air convection (HA), infrared (IR), and combined drying systems (IR-HA). The specific energy consumption (SEC) decreased significantly by increasing the drying temperature using convective drying, but higher air velocities increased the SEC. Similarly, increasing air velocity in the infrared dryer resulted in a significant increase in SEC. The lowest SEC was recorded at 7.8 MJ/kg at an air velocity of 0.5 m/s and an IR intensity of 0.30 W/cm2, while a maximum SEC (20.7 MJ/kg) was observed at 1.0 m/s and 0.15 W/cm2. However, a significant reduction in the SEC was noticed in the combined drying system. A minimum SEC of 3.8 MJ/kg was recorded using the combined infrared-hot air convection (IR-HA) drying system, which was 91.7% and 51.7% lower than convective and IR dryers, respectively. The present study suggested a combination of IR and hot air convection at 60 °C, 0.3 W/cm2 and 0.5 m/s as optimum conditions for efficient drying of biomass with a high water content.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Infrared Radiation Combined with Hot Air Convection for Energy-Efficient Drying of Biomass

et al. 2019

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“…Wang et al investigated the interactions by co‐pyrolyzing different terrestrial biomass components and found that there existed distinct interactions between co‐pyrolysis of lignin‐cellulose but minor interactions between lignin‐xylan. In our previous research, the interaction of macroalgae and terrestrial plant during pyrolysis has been studied and there exited a synergistic effect between them . The results revealed that the crude oil quality was promoted by deoxygenation reaction and the hydrogen to carbon ratio and the content of aromatic substances were increased, while the bio‐oil yield was decreased .…”

Section: Introductionmentioning

confidence: 99%

Co‐pyrolysis characteristics of polysaccharides‐cellulose and the co‐pyrolyzed compound distributions over two kinds of zeolite catalysts

et al. 2020

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Summary Co‐pyrolysis characteristics of soluble polysaccharides‐cellulose were investigated through thermogravimetric analysis (TGA), kinetic analysis, analytical pyrolyser coupled with gas chromatograph‐mass spectrometer (Py‐GC/MS) and subsequent density functional theory (DFT). Results from TGA and differential thermogravimetric analysis (DTG) analyses indicated that there were synergistic effects in the polysaccharides‐cellulose (PS‐CE) blends pyrolysis process. Surprisingly in co‐pyrolysis process from Py‐GC/MS analysis, the furans were suppressed, while the anhydrosugars were increased. The DFT calculation showed that free radicals pyrolyzed from soluble polysaccharides could suppress the ring‐opening reaction of D‐glucopyranose. The co‐pyrolyzed chemical compound distribution over the catalysts (MCM‐41, ZSM‐5 and their mixtures) was also detected through Py‐GC/MS analysis. Both the zeolites showed high selectivity for 5‐methyl‐2‐furaldehyde and 2‐furaldehyde. The two kinds of zeolites could induce the generation of furans but suppress the production of anhydrosugars, which was the opposite effect of the co‐pyrolysis of PS‐CE.

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“…Rice husk (RH) is widely distributed and has potential to be used for bio-oil production [12][13][14][15][16]. According to the statistics in the United States Department of Agriculture, the global rice production has increased to 657.9 million tons in 2019, which indicates the production of a large amount of RH as a byproduct [17].…”

Section: Introductionmentioning

confidence: 99%

Integrated Leaching and Thermochemical Technologies for Producing High-Value Products from Rice Husk: Leaching of Rice Husk with the Aqueous Phases of Bioliquids

Gao

Karnowo

et al. 2020

Energies

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It remains challenging to develop a techno-economically feasible method to remove alkali and alkaline earth metal species (AAEMs) from rice husk (RH), which is a widely available bioresource across the world. In this study, the AAEMs leaching effect of aqueous phases of both bio-crude prepared by hydrothermal liquefaction (AP-HT) and bio-oil prepared by pyrolysis (AP-Pyro) of RH were systematically investigated. The results indicated that although the acidity of AP-HT and AP-Pyro are much lower than that of HCl, they performed a comparable removal efficiency on AAEMs (Na: 56.2%, K: 96.7%, Mg: 91.0%, Ca: 46.1% for AP-HT, while Na: 58.9%, K: 96.9%, Mg: 94.0%, Ca: 86.3% for AP-Pyro) with HCl. The presence of phenolics in bio-oil could facilitate the penetration of water and organic acids into the inner area of RH cells, thus enhancing the AAEMs removal via chelate reactions. The thermal stability of leached RH during thermochemical conversions was studied via TG and Py-GC-MS. The results showed that the heat conduction efficiency in leached RH was enhanced with a high pyrolysis rate, resulting in a narrow carbon chain distribution (C5–C10) of derived chemical compounds.

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Co-pyrolysis and co-hydrothermal liquefaction of seaweeds and rice husk: Comparative study towards enhanced biofuel production

Cited by 80 publications

References 57 publications

Evaluation of Infrared Radiation Combined with Hot Air Convection for Energy-Efficient Drying of Biomass

Evaluation of Infrared Radiation Combined with Hot Air Convection for Energy-Efficient Drying of Biomass

Co‐pyrolysis characteristics of polysaccharides‐cellulose and the co‐pyrolyzed compound distributions over two kinds of zeolite catalysts

Integrated Leaching and Thermochemical Technologies for Producing High-Value Products from Rice Husk: Leaching of Rice Husk with the Aqueous Phases of Bioliquids

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