Product characteristics of rice straw pyrolysis at different temperature: Role of inherent alkali and alkaline earth metals with different occurrence forms

Zhang, Yujie; Lv, Peng; Wang, Jiaofei; Wei, Juntao; Cao, Pengwei; Bie, Nanxi; Bai, Yonghui; Yu, Guangsuo

doi:10.1016/j.joei.2022.01.016

Cited by 23 publications

(6 citation statements)

References 49 publications

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“…RYield, REquil and RGibbs blocks are developed to model the pyrolysis reactor. As shown in Table 6 , the simulated results of biomass pyrolysis are verified by the work of Zhang [ 20 ]. Due to the difference between simulation and actual reaction process, there are relative errors between simulation results and experiment results.…”

Section: Methodssupporting

confidence: 63%

“…According to Equations (4)–(6), the efficiency of H 2 generation, efficiency of bio-oil generation and efficiency of biochar generation are 6.35%, 23.07% and 24.18%, respectively. The efficiency of hydrogen generation from coal can reach 15% [ 20 ]; in contrast, that for biomass can only approach about 5% [ 14 ]. Nevertheless, although the efficiency of hydrogen generation for pyrolysis gas is lower than coal, using pyrolysis gas as a reductant in the chemical looping hydrogen generation process can enhance the efficiency of hydrogen generation from biomass.…”

Section: Resultsmentioning

confidence: 99%

“…Then, the crushed rice straw is sent to the pyrolysis reactor. According to the related reference [ 20 ], the reaction temperature and pressure of the pyrolysis reactor are set to be 600 °C and 0.1 MPa, respectively. Exiting from the pyrolysis reactor, biochar is separated from the mixture of gas and bio-oil via the separator.…”

Section: Methodsmentioning

confidence: 99%

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New Process Combining Fe-Based Chemical Looping and Biomass Pyrolysis for Cogeneration of Hydrogen, Biochar, Bio-Oil and Electricity with In-Suit CO2 Separation

Zhou

Jin

et al. 2023

Molecules

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Fe-based chemical looping gasification is a clean biomass technology, which has the advantage of reducing CO2 emissions and the potential of self-sustaining operation without supplemental heating. A novel process combining Fe-based chemical looping and biomass pyrolysis was proposed and simulated using Aspen Plus. The biomass was first subjected to pyrolysis to coproduce biochar, bio-oil and pyrolysis gas; the pyrolysis gas was subjected to an Fe looping process to obtain high-purity hydrogen and carbon dioxide. The influences of the pyrolysis reactor operating temperature and fuel reactor operation temperature, and the steam reactor and air reactor on the process performance are researched. The results showed that, under the operating condition of the established process, 23.07 kg/h of bio-oil, 24.18 kg/h of biochar, 3.35 kg/h of hydrogen and a net electricity of 3 kW can be generated from 100 kg/h of rice straw, and the outlet CO2 concentration of the fuel reactor was as high as 80%. Moreover, the whole exergy efficiency and total exergy loss of the proposed process was 58.98% and 221 kW, respectively. Additionally, compared to biomass direct chemical looping hydrogen generation technology, the new process in this paper, using biomass pyrolysis gas as a reactant in the chemical looping hydrogen generation process, can enhance the efficiency of hydrogen generation.

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Section: Methodssupporting

confidence: 63%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

New Process Combining Fe-Based Chemical Looping and Biomass Pyrolysis for Cogeneration of Hydrogen, Biochar, Bio-Oil and Electricity with In-Suit CO2 Separation

Zhou

Jin

et al. 2023

Molecules

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“…During the pyrolysis process, the externally added compounds − and the inherent substances of different samples exhibit catalytic effects, as explained in various studies. , Alkali and alkaline elements significantly affect the thermal degradation profile . Zarnegar reviewed the effect of different catalysts, such as activated char, supported metals, and alkali/alkaline metals, on the pyrolysis product yield and quality performance improvement.…”

Section: Introductionmentioning

confidence: 99%

“… 20 , 21 Alkali and alkaline elements significantly affect the thermal degradation profile. 22 Zarnegar 23 reviewed the effect of different catalysts, such as activated char, supported metals, and alkali/alkaline metals, on the pyrolysis product yield and quality performance improvement. Although there have been extensive studies on the catalytic effects of different substances during the pyrolysis process, all of these catalytic studies were limited to one or two genetically distinct substances.…”

Section: Introductionmentioning

confidence: 99%

Thermo-kinetic Study of Genetically Different Carbon-Source Materials

Saini,

Barma,

Rao

et al. 2023

ACS Omega

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A nonisothermal thermogravimetric analysis (TGA) technique was applied to determine the devolatilization kinetic parameters of completely different genesis samples of four groups: coal, biomass, lignite, and petcoke. The physical and chemical characteristics were determined using the proximate and ultimate analysis and the ash composition profile using the X-ray fluorescence method. Heating rates of 10, 15, and 20 °C/min were used in the temperature range of 25−1000 °C during the slow pyrolysis under an inert gas atmosphere. A widely used and proposed first-order Coats− Redfern kinetic model was applied, which showed the highest values of activation energies (E a ) for the petcoke sample from 57.17 to 67.58 kJ/mol at three different heating rates, while the lignite sample represented the lowest E a values between 12.84 and 16.03 kJ/mol. The thermo-kinetic behavior was explained based on the catalytic effect of the ash composition profile, morphology, and structure of the substances determined using different analytical techniques. For the TGA process, the application of scanning electron microscopy, Fourier-transform infrared spectroscopy, etc., for the physiochemical analysis of the four genetically different carbonsource materials represented the novelty of the present work.

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Effect of alkali metal on pyrolysis characteristics and pyrolysis gas products of Triarrhena lutarioriparia

Zhou

Gao

Tian

et al. 2022

Biomass Conv. Bioref.

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Product characteristics of rice straw pyrolysis at different temperature: Role of inherent alkali and alkaline earth metals with different occurrence forms

Cited by 23 publications

References 49 publications

New Process Combining Fe-Based Chemical Looping and Biomass Pyrolysis for Cogeneration of Hydrogen, Biochar, Bio-Oil and Electricity with In-Suit CO2 Separation

New Process Combining Fe-Based Chemical Looping and Biomass Pyrolysis for Cogeneration of Hydrogen, Biochar, Bio-Oil and Electricity with In-Suit CO2 Separation

Thermo-kinetic Study of Genetically Different Carbon-Source Materials

Effect of alkali metal on pyrolysis characteristics and pyrolysis gas products of Triarrhena lutarioriparia

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