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High-Charge Density Polymerized Ionic Networks Boosting High Ionic Conductivity as Quasi-Solid Electrolytes for High-Voltage Batteries. PubMed SCIE
期刊论文 | 2019 , 11 (4) , 4001-4010 | ACS applied materials & interfaces
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Abstract :

Solid-state electrolytes are actively sought for their potential application in energy storage devices, especially lithium metal rechargeable batteries. However, one of the key challenges in the development of solid-state electrolytes is their lower ionic conductivity compared with that of liquid electrolytes (10<sup>-2</sup> S cm<sup>-1</sup> at room temperature), where a large gap still exists. Therefore, the pursuit of high ionic conductivity equal to that of liquid electrolytes remains the main objective for the design of solid-state electrolytes. Here, we show a series of high-charge density polymerized ionic networks as solid-state electrolytes that take inspiration from poly(ionic liquid)s. The obtained quasi-solid electrolyte slice displays an astonishingly high ionic conductivity of 5.89 × 10<sup>-3</sup> S cm<sup>-1</sup> at 25 °C (the highest conductivity among those of the state-of-art polymer gel electrolytes and polymer solid electrolytes) and ultrahigh decomposition potential, >5.2 V versus Li/Li<sup>+</sup>, which are attributed to the continuous ion transport channel formed by an ultrahigh ion density and an enhanced chemical stability endowed by highly cross-linked networks. The Li/LiFePO4 and Li/LiCoO2 batteries (3.0-4.4 V) assembled with the solid electrolytes show high stable capacities of around 155 and 130 mAh g<sup>-1</sup>, respectively. In principle, our work breaks new ground for the design and fabrication of the solid-state electrolytes in various energy conversion devices.

Keyword :

polymer electrolytes solid electrolytes ionic conductivity lithium metal batteries polymerized ionic networks

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GB/T 7714 Tian Xiaolu , Yi Yikun , Yang Pu et al. High-Charge Density Polymerized Ionic Networks Boosting High Ionic Conductivity as Quasi-Solid Electrolytes for High-Voltage Batteries. [J]. | ACS applied materials & interfaces , 2019 , 11 (4) : 4001-4010 .
MLA Tian Xiaolu et al. "High-Charge Density Polymerized Ionic Networks Boosting High Ionic Conductivity as Quasi-Solid Electrolytes for High-Voltage Batteries." . | ACS applied materials & interfaces 11 . 4 (2019) : 4001-4010 .
APA Tian Xiaolu , Yi Yikun , Yang Pu , Liu Pei , Qu Long , Li Mingtao et al. High-Charge Density Polymerized Ionic Networks Boosting High Ionic Conductivity as Quasi-Solid Electrolytes for High-Voltage Batteries. . | ACS applied materials & interfaces , 2019 , 11 (4) , 4001-4010 .
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Carbon-nanotube/sulfur cathode with in-situ assembled Si3N4/graphene interlayer for high-rate and long cycling-life lithium-sulfur batteries EI SCIE
期刊论文 | 2019 , 296 , 155-164 | Electrochimica Acta
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Abstract :

A Si3N4/graphene composite is designed as an interlayer for a carbon-nanotubes/sulfur cathode to improve electrochemical performance of lithium-sulfur batteries. In the interlayer, Si3N4 nanoparticles suppress the migration of the dissolved polysulfides and graphene sheets construct a 3-dimensional charge-transfer network. The carbon-nanotubes/sulfur@Si3N4/graphene cathode delivers an initial discharge capacity of 1334.7 mAh g−1 at 0.1 C and retains a capacity as high as 745.8 mAh g−1 after 200 cycles, with a capacity fade ratio of 0.22% per cycle. The cathode shows good cycling life, delivering a discharge capacity of 413.3 mAh g−1 for 1 C after 1000 cycles. According to the results of density functional theory calculation, the anchoring of the Si3N4/graphene interlayer to lithium polysulfide can be attributed to a coefficient chemical binding of Li-N and Si-S bonds generating from electronic conjugation effect between the Si3N4 supercell surface and the polysulfides. Generally, the improvement in electrochemical performance originates from the enhancements in Li+ diffusion coefficient and charge transfer, and from the restraining of the shuttle effect of the dissolved lithium polysulfide as a result of the Si3N4/graphene interlayer. © 2018 Elsevier Ltd

Keyword :

Chemical binding Conjugation effects Discharge capacities Electrochemical performance Initial discharge capacities Shuttle effect Sulfur cathodes Transfer network

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GB/T 7714 Qu, Long , Liu, Pei , Zhang, Peng et al. Carbon-nanotube/sulfur cathode with in-situ assembled Si3N4/graphene interlayer for high-rate and long cycling-life lithium-sulfur batteries [J]. | Electrochimica Acta , 2019 , 296 : 155-164 .
MLA Qu, Long et al. "Carbon-nanotube/sulfur cathode with in-situ assembled Si3N4/graphene interlayer for high-rate and long cycling-life lithium-sulfur batteries" . | Electrochimica Acta 296 (2019) : 155-164 .
APA Qu, Long , Liu, Pei , Zhang, Peng , Wang, Tao , Yi, Yikun , Yang, Pu et al. Carbon-nanotube/sulfur cathode with in-situ assembled Si3N4/graphene interlayer for high-rate and long cycling-life lithium-sulfur batteries . | Electrochimica Acta , 2019 , 296 , 155-164 .
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Spatial positioning effect of dual cocatalysts accelerating charge transfer in three dimensionally ordered macroporous g-C3N4 for photocatalytic hydrogen evolution Scopus SCIE
期刊论文 | 2019 , 243 , 94-105 | Applied Catalysis B: Environmental
SCOPUS Cited Count: 1
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© 2018 Elsevier B.V. The relatively low charge transfer efficiency remains the critical limiting factor for the practical application of solar-driven water splitting. In this work, a promising photocatalyst intensified by dual cocatalysts was developed via separately loading Au nanoparticles and CoP nanosheets onto the inside and outside surface of three dimensionally ordered macroporous (3DOM) g-C3N4 framework to significantly facilitate the ordered transfer of charges. The spatial positioning of dual cocatalysts and average wall thickness of 3DOM g-C3N4 framework were precisely controlled to reveal the optimal distribution position of Au and CoP as well as the most appropriate transfer distance for charges (from 3DOM g-C3N4 walls to the surface of cocatalysts), respectively. The results show that the spatial positioning effect of dual cocatalysts and optimization of charge transfer distance can endow the CoP/3DOM g-C3N4/Au photocatalyst with an excellent charge transfer efficiency, thereby contributing to high apparent quantum efficiency (AQE, 27.6% at 435 nm and 29.9% at 550 nm) and photocatalytic H2 evolution activity of 11,820.1 μmol h−1 g−1, which is up to 619.9, 6.5 and 5.6 times than that of 3DOM g-C3N4, CoP/3DOM g-C3N4 and 3DOM g-C3N4/Au, respectively. This work would provide a new platform to design high-performance artificial photocatalysts with superior charge transfer capacity.

Keyword :

3DOM g-C3N4 Charge transfer distance Dual cocatalysts Photocatalytic hydrogen evolution Spatial positioning effect

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GB/T 7714 Lin, Bo , Li, Jiali , Xu, Baorong et al. Spatial positioning effect of dual cocatalysts accelerating charge transfer in three dimensionally ordered macroporous g-C3N4 for photocatalytic hydrogen evolution [J]. | Applied Catalysis B: Environmental , 2019 , 243 : 94-105 .
MLA Lin, Bo et al. "Spatial positioning effect of dual cocatalysts accelerating charge transfer in three dimensionally ordered macroporous g-C3N4 for photocatalytic hydrogen evolution" . | Applied Catalysis B: Environmental 243 (2019) : 94-105 .
APA Lin, Bo , Li, Jiali , Xu, Baorong , Yan, Xiaoqing , Yang, Bolun , Wei, Jinjia et al. Spatial positioning effect of dual cocatalysts accelerating charge transfer in three dimensionally ordered macroporous g-C3N4 for photocatalytic hydrogen evolution . | Applied Catalysis B: Environmental , 2019 , 243 , 94-105 .
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Enhanced Cycling Performance for Lithium?Sulfur Batteries by a Laminated 2D g-C3N4/Graphene Cathode Interlayer EI SCIE PubMed
期刊论文 | 2019 , 12 (1) , 213-223 | ChemSusChem
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Decay in electrochemical performance resulting from the “shuttle effect” of dissolved lithium polysulfides is one of the biggest obstacles for the realization of practical applications of lithium–sulfur (Li–S) batteries. To meet this challenge, a 2D g-C3N4/graphene sheet composite (g-C3N4/GS) was fabricated as an interlayer for a sulfur/carbon (S/KB) cathode. It forms a laminated structure of channels to trap polysulfides by physical and chemical interactions. The thin g-C3N4/GS interlayer significantly suppresses diffusion of the dissolved polysulfide species (Li2Sx; 2<x≤8) from the cathode to the anode, as proven by using an H-type glass cell divided by a g-C3N4/GS-coated separator. The S/KB cathode with the g-C3N4/GS interlayer (S/KB@C3N4/GS) delivers a discharge capacity of 1191.7 mAh g−1 at 0.1 C after 100 cycles, an increase of more than 90 % compared with an S/KB cathode alone (625.8 mAh g−1). The S/KB@C3N4/GS cathode shows good cycling life, delivering a discharge capacity as high as 612.4 mAh g−1 for 1 C after 1000 cycles. According to XPS results, the anchoring of the g-C3N4/GS interlayer to Li2Sx can be attributed to a coefficient chemical binding effect of g-C3N4 and graphene on long-chain polysulfides. Generally, the improvement in electrochemical performance originates from a coefficient of the enhanced Li+ diffusion coefficient, increased charge transfer, and the weakening of the shuttle effect of the dissolved Li2Sx as a result of the g-C3N4/GS interlayer. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Keyword :

Cathode interlayers Chemical binding Chemical interactions Cycling performance Discharge capacities Electrochemical performance Laminated structures sulfides

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GB/T 7714 Qu, Long , Liu, Pei , Yi, Yikun et al. Enhanced Cycling Performance for Lithium?Sulfur Batteries by a Laminated 2D g-C3N4/Graphene Cathode Interlayer [J]. | ChemSusChem , 2019 , 12 (1) : 213-223 .
MLA Qu, Long et al. "Enhanced Cycling Performance for Lithium?Sulfur Batteries by a Laminated 2D g-C3N4/Graphene Cathode Interlayer" . | ChemSusChem 12 . 1 (2019) : 213-223 .
APA Qu, Long , Liu, Pei , Yi, Yikun , Wang, Tao , Yang, Pu , Tian, Xiaolu et al. Enhanced Cycling Performance for Lithium?Sulfur Batteries by a Laminated 2D g-C3N4/Graphene Cathode Interlayer . | ChemSusChem , 2019 , 12 (1) , 213-223 .
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In situ DRIFTS for the mechanistic studies of 1,4-butanediol dehydration over Yb/Zr catalysts EI SCIE
期刊论文 | 2019 , 138-151 | Journal of Catalysis
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To study the effect of acid-base properties of catalysts on 1,4-butanediol (BDO) dehydration to 3-buten-1-ol (BTO), Yb/Zr catalysts with different Yb content were synthesized by a wet impregnation method. The texture property, crystalline form and surface properties of the catalysts were characterized by N2 physisorption, XRD, NH3-TPD, CO2-TPD and in situ DRIFTS. The catalytic performance of BDO dehydration was also tested in a fixed-bed reactor. The experimental results showed that the activity of BDO dehydration and the selectivity of by-product tetrahydrofuran (THF) decreased with the increased Yb content, while the selectivity of the main product BTO gradually increased. The yield of BTO maximized at 64.5% when the Yb content reached 15%, which showed the best catalytic performance. Comprehensive analysis of experimental results showed that the activity of BDO dehydration and the selectivity to the by-product THF were manipulated by the acid sites of the catalysts, while BTO selectivity was tuned by both acid and basic sites of the catalysts. A higher density ratio of basic/acid sites favored the BTO formation and inhibited the formation of by-products THF. The in situ DRIFTS study of BDO dehydration over m-ZrO2 and Yb2O3 elucidated that the hydroxyl groups of BDO molecules first interacted with acid sites to form several types of butoxides. Further abstraction of β-H by basic oxygen anion could convert these butoxides into aldehyde species, which finally reacted to form BTO. The DRIFTS results were consistent with the experimental conclusions that the acid sites of the catalysts could interact with hydroxyl groups and basic sites facilitate the β-H abstraction of BDO and thereby enhancing the formation of BTO. © 2018

Keyword :

1 ,4-Butanediol Acid-base property Catalytic performance Comprehensive analysis Mechanistic studies Situ DRIFT Texture properties Wet impregnation method

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GB/T 7714 Mi, Rongli , Hu, Zhun , Yang, Bolun . In situ DRIFTS for the mechanistic studies of 1,4-butanediol dehydration over Yb/Zr catalysts [J]. | Journal of Catalysis , 2019 : 138-151 .
MLA Mi, Rongli et al. "In situ DRIFTS for the mechanistic studies of 1,4-butanediol dehydration over Yb/Zr catalysts" . | Journal of Catalysis (2019) : 138-151 .
APA Mi, Rongli , Hu, Zhun , Yang, Bolun . In situ DRIFTS for the mechanistic studies of 1,4-butanediol dehydration over Yb/Zr catalysts . | Journal of Catalysis , 2019 , 138-151 .
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Co-pyrolysis behavior of microalgae biomass and low-rank coal: Kinetic analysis of the main volatile products. PubMed Scopus SCIE
期刊论文 | 2019 , 271 , 202-209 | Bioresource technology
SCOPUS Cited Count: 3
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Abstract :

This work studied the kinetic characteristics of volatile products from co-pyrolysis of microalgae and low-rank coal. Iso-conversional method was applied to calculate the reaction order, activation energy and pre-exponential factor of gaseous products (H2, CO, CH4, and CO2) and benzene. The results indicated the activation energy of H2 generating from both individual and mixing samples was the highest, meaning H2 was the hardest to generate during the pyrolysis process. The values of activation energy from the formation of CO and benzene from low-rank coal and green algae were 31.11, 32.44, 18.21 and 24.31 kJ·mol<sup>-1</sup>, respectively. The formation of benzene and CO were easier than other volatile products due to the lower activation energy. Synergistic effects were observed from the formation of CO2, the addition of green algae decreased the activation energy. The order of the activation energy was in agreement with that of the releasing sequence of main volatile products.

Keyword :

Kinetic analysis Low-rank coal Microalgae biomass Co-pyrolysis Synergistic effects

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GB/T 7714 Wu Zhiqiang , Li Yaowu , Zhang Bo et al. Co-pyrolysis behavior of microalgae biomass and low-rank coal: Kinetic analysis of the main volatile products. [J]. | Bioresource technology , 2019 , 271 : 202-209 .
MLA Wu Zhiqiang et al. "Co-pyrolysis behavior of microalgae biomass and low-rank coal: Kinetic analysis of the main volatile products." . | Bioresource technology 271 (2019) : 202-209 .
APA Wu Zhiqiang , Li Yaowu , Zhang Bo , Yang Wangcai , Yang Bolun . Co-pyrolysis behavior of microalgae biomass and low-rank coal: Kinetic analysis of the main volatile products. . | Bioresource technology , 2019 , 271 , 202-209 .
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Multi-scale CFD simulations of bubbling fluidized bed methanation process EI Scopus
期刊论文 | 2018 | Chemical Engineering Journal
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The two-fluid model coupled with the improved local-structure-dependent drag model and the modified chemical kinetics is employed to account for the multi-scale phenomenon in a bubbling fluidized bed methanation process for the production of synthetic natural gas. The accuracy of this multi-scale CFD model is verified by a series of experimental data under different operating temperatures, inlet compositions, inlet velocities and initial bed heights. The cold flow CFD simulations are further carried out to evaluate the effects of the chemical reactions on the meso-scale structure. The results demonstrate that the bubble volume fraction and bubble velocity decreases due to the gas volume contraction caused by the methanation reactions. Three-region distribution of the gas temperature is obtained by simultaneously solving the multi-scale CFD model and the energy equations and the simulation results are compared with those based on the isothermal flow assumption. The results indicate that the distributions of solid volume fraction and mole fractions obtained based on the isothermal flow assumption are almost coincident with those obtained by solving the energy equations, which confirms the rationality of the isothermal flow assumption in a fluidized bed reactor. © 2018 Elsevier B.V.

Keyword :

Bubbling fluidized bed CFD simulations Fluidized bed reactors Mesoscale structure Multi-scale Operating temperature Solid volume fraction Synthetic natural gas

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GB/T 7714 Li, Jiageng , Yang, Bolun . Multi-scale CFD simulations of bubbling fluidized bed methanation process [J]. | Chemical Engineering Journal , 2018 .
MLA Li, Jiageng et al. "Multi-scale CFD simulations of bubbling fluidized bed methanation process" . | Chemical Engineering Journal (2018) .
APA Li, Jiageng , Yang, Bolun . Multi-scale CFD simulations of bubbling fluidized bed methanation process . | Chemical Engineering Journal , 2018 .
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Catalytic Decomposition of Nitrogen Oxides by Bimetallic Catalysts Synthesized by Dielectric Barrier Discharge Plasma Technology EI Scopus CSSCI-E
会议论文 | 2018 , 53 | 3rd International Conference on Advances in Energy and Environment Research, ICAEER 2018
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Nitrous oxide (N2O) is a common greenhouse gas and urgent need to be contained. Direct catalytic decomposition of N2O by high activity catalyst into N2 and O2 is a low-cost and harmless method. Bimetallic catalysts show good catalytic activity in many classes of reactions, and plasma technologies, applied to prepare of catalyst, are considered to be a promising method. In our contribution, DBD cold plasma is applied to synthesize Rhodium and Cobalt bimetallic catalysts for catalytic N2O decomposition. The influence of cobalt and rhodium content on N2O decomposition activity shows that the optimal amount of metal is determined as 5wt. % cobalt and 0.5wt. % rhodium loaded on Al2O3. The best working voltage is determined as 18kV. The results indicated that the Rh/Al2O3 catalysts prepared by atmospheric-pressure DBD cold plasma showed smaller size and high dispersion of Rh particles, so that the metal-support interaction and the catalytic activity are enhanced. Atmospheric-pressure DBD cold plasma is proved to be an environmentally friendly and efficient method for preparing high performance Rhodium and Cobalt bimetallic catalysts for catalytic N2O decomposition. © The Authors, published by EDP Sciences, 2018.

Keyword :

Bimetallic catalysts Catalytic decomposition Catalytic N2O decomposition Dielectric barrier discharge plasmas Metal-support interactions N2O decomposition Plasma technology Rh/Al2O3 catalyst

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GB/T 7714 Shi, Libin , Qi, Suitao , Jiao, Tianyou et al. Catalytic Decomposition of Nitrogen Oxides by Bimetallic Catalysts Synthesized by Dielectric Barrier Discharge Plasma Technology [C] . 2018 .
MLA Shi, Libin et al. "Catalytic Decomposition of Nitrogen Oxides by Bimetallic Catalysts Synthesized by Dielectric Barrier Discharge Plasma Technology" . (2018) .
APA Shi, Libin , Qi, Suitao , Jiao, Tianyou , Qu, Jifeng , Tan, Xiao , Yi, Chunhai et al. Catalytic Decomposition of Nitrogen Oxides by Bimetallic Catalysts Synthesized by Dielectric Barrier Discharge Plasma Technology . (2018) .
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Kinetic analysis on gaseous products during co-pyrolysis of low-rank coal with lignocellulosic biomass model compound: Effect of lignin EI
会议论文 | 2018 , 152 , 916-921 | 2018 Applied Energy Symposium and Forum, Carbon Capture, Utilization and Storage, CCUS 2018
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Co-pyrolysis of coal and lignocellulosic biomass can reduce the consumption of non-renewable fossil fuel and improve the proportion of renewable energy. Products distribution and kinetic analysis can provide fundamental information about the process design and facility development. In this paper, kinetic analysis on the main gaseous products during co-pyrolysis of low-rank coal with lignocellulosic biomass model compound was explored via a drop tube furnace combined with process mass spectrometer. Lignin was selected as the typical model compound, which is also the main content of black liquor from the paper industry. Releasing properties of the main volatile products from individual and mixing materials under various lignin mixing ratios were obtained. Iso-conversional method was applied to calculate the kinetic parameters, including reaction order, frequency factor, and activation energy. The activation energy about forming of CO2, CO, CH4, and H2 from low-rank coal was 40.23 kJ/mol, 20.39 kJ/mol, 48.39 kJ/mol and 37.37 kJ/mol. The frequency factor were 1.48, 0.12, 6.43 and 0.43 respectively. The activation energy about forming of CO2, CO, CH4, and H2 from lignin was 15.42 kJ/mol, 32.28 kJ/mol, 12.94 kJ/mol and 35.21 kJ/mol. Copyright © 2018 Elsevier Ltd. All rights reserved.

Keyword :

Copyrolysis Drop tube furnaces Iso-conversional method Kinetic analysis Lignocellulosic biomass Low rank coals Products distributions Renewable energies

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GB/T 7714 Fan, Yingjie , Li, Yaowu , Wu, Zhiqiang et al. Kinetic analysis on gaseous products during co-pyrolysis of low-rank coal with lignocellulosic biomass model compound: Effect of lignin [C] . 2018 : 916-921 .
MLA Fan, Yingjie et al. "Kinetic analysis on gaseous products during co-pyrolysis of low-rank coal with lignocellulosic biomass model compound: Effect of lignin" . (2018) : 916-921 .
APA Fan, Yingjie , Li, Yaowu , Wu, Zhiqiang , Sun, Zongyu , Yang, Bolun . Kinetic analysis on gaseous products during co-pyrolysis of low-rank coal with lignocellulosic biomass model compound: Effect of lignin . (2018) : 916-921 .
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On-line analysis on fast pyrolysis of lignocellulosic biomass: Thermal behavior and kinetic analysis of hemicellulose EI
会议论文 | 2018 , 152 , 1290-1295 | 2018 Applied Energy Symposium and Forum, Carbon Capture, Utilization and Storage, CCUS 2018
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Abstract :

Thermal conversion of lignocellulosic biomass can provide various products for the energy demand of low carbon city. Pyrolysis is the initial step of other thermochemical method, which is also a potential technology for biomass conversion. Previous research mainly focuses on the thermal behavior of the whole component in lignocellulosic biomass during pyrolysis. The organic component has a significant influence on the products distribution and kinetic characteristic. Thus, in this research hemicellulose (HCE) was selected as one of the typical organic components in biomass. Products distribution and characteristic of gas were explored by a tube furnace and an on-line mass spectrometer from 650oC to 850oC. Iso-conversional method was applied to obtain the kinetic parameters of gaseous products (H2、CO、CH4 and CO2) from HCE. The results indicated that gas and tar were the main products from fast pyrolysis of HCE. The yield of gas increased from 26.65 wt.% to 44.63 wt.% as the increase of temperature. CO and CO2 were the main content of gaseous, which accounted about 80 % the gas. The volume of H2 increased from 5.28 vol.% to 15.82 vol.% when temperature increased from 650oC to 850oC. The high heating value of the gaseous products was between 10.95 and 12.52 MJ·Nm-3. Releasing properties of the main volatile products from HCE were also obtained, and the intensity of gaseous was similar with the yield changing. The activation energy for CO2, CO, CH4, and H2 were 22.35 kJ·mol-1, 36.13 kJ·mol-1, 26.65 kJ·mol-1, 21.66 kJ·mol-1. The pre-exponential of H2, CO, CH4 and CO2 was 0.3436 s-1, 1.5898 s-1, 1.0298 s-1, 0.4937 s-1, respectively. Copyright © 2018 Elsevier Ltd. All rights reserved.

Keyword :

Iso-conversional method Kinetic analysis Kinetic characteristics Lignocellulosic biomass Potential technologies Products distributions Thermal behaviors Typical organic component

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GB/T 7714 Wu, Zhiqiang , Li, Yaowu , Meng, Haiyu et al. On-line analysis on fast pyrolysis of lignocellulosic biomass: Thermal behavior and kinetic analysis of hemicellulose [C] . 2018 : 1290-1295 .
MLA Wu, Zhiqiang et al. "On-line analysis on fast pyrolysis of lignocellulosic biomass: Thermal behavior and kinetic analysis of hemicellulose" . (2018) : 1290-1295 .
APA Wu, Zhiqiang , Li, Yaowu , Meng, Haiyu , Yang, Wangcai , Yang, Bolun . On-line analysis on fast pyrolysis of lignocellulosic biomass: Thermal behavior and kinetic analysis of hemicellulose . (2018) : 1290-1295 .
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