Synergistic effect of mixing wheat straw and lignite in co-pyrolysis and steam co-gasification

Zhao, Shuheng; Yang, Panbo; Liu, Xiaofeng; Zhang, Quanguo; Hu, Jianjun

doi:10.1016/j.biortech.2020.122876

Cited by 35 publications

(7 citation statements)

References 46 publications

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“…For coals of various rank, the concentration of syngas has been reported to range between 58% and 83% [6,17,26], while for some agricultural residues, such as cotton straw, corn stalk and rice husk, it is reported to vary between 61% and 74% at temperatures of 800-900 °C [4,5,31]. The distribution of gases within the generated product at 1000 °C was reflected in the higher heating value of the gas mixture from the gasification of the fuels For coals of various rank, the concentration of syngas has been reported to range between 58% and 83% [6,17,26], while for some agricultural residues, such as cotton straw, corn stalk and rice husk, it is reported to vary between 61% and 74% at temperatures of 800-900 • C [4,5,31]. The distribution of gases within the generated product at 1000 • C was reflected in the higher heating value of the gas mixture from the gasification of the fuels studied.…”

Section: Gasification Performance Of Fuels and Their Mixture With Ste...mentioning

confidence: 99%

“…The co-gasification of low-rank coals with agricultural wastes for the production of syngas under a steam or carbon dioxide atmosphere has not been sufficiently studied. The co-processing of lignite with wheat straw [26] or sunflower seed cake [6] via steam gasification showed that the biomass material exhibited a positive synergetic effect on the blends, attributed to the volatile content of biomass and the inherent alkali/alkaline earth metals. Similar results were obtained by the carbon dioxide gasification of lignite with soybean stalk or orange peel [14].…”

Section: Introductionmentioning

confidence: 99%

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Gasification Performance of Barley Straw Waste Blended with Lignite for Syngas Production under Steam or Carbon Dioxide Atmosphere

Vamvuka,

Zacheila

2024

Applied Sciences

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The gasification performance of lignite/barley straw mixtures for syngas production was investigated. The experiments were carried out under a steam or carbon dioxide atmosphere, in fixed-bed and thermogravimetric–mass spectrometry systems. The thermal behavior, reactivity, conversion, product gas composition, liquid and gaseous by-products and interactions between fuels were determined and correlated with the structural characteristics and inherent minerals in ashes, which were analyzed via mineralogical, chemical and fusibility tests. Devolatilization of the materials up to 600 °C resulted in the carbon enrichment of chars and a 30–90-fold increase in the specific surface area. Gaseous and liquid by-products with higher heating values of 5–7 MJ/m3 and 20–28 MJ/kg could offer valuable energy. Upon steam gasification up to 1000 °C, product gas was enriched in hydrogen and carbon monoxide. The syngas yield and heating value of the gas mixture were higher for barley straw fuel (0.77 m3/kg, 11.4 MJ/m3), which, when blended with the lignite, produced upgraded products. Upon carbon dioxide gasification up to 1000 °C, barley straw char exhibited a 3-times higher rate than the lignite, as well as higher conversion (94.5% vs. 62.9%) and a higher syngas yield (0.84 m3/kg vs. 0.55 m3/kg). Lignite/barley straw blends showed synergistic effects and presented higher gasification reactivity and conversion in comparison to lignite. The overall performance of lignite was improved with the steam reagent, while that of barley straw was improved with the carbon dioxide reagent.

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Section: Gasification Performance Of Fuels and Their Mixture With Ste...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Gasification Performance of Barley Straw Waste Blended with Lignite for Syngas Production under Steam or Carbon Dioxide Atmosphere

Vamvuka,

Zacheila

2024

Applied Sciences

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“…Under these conditions, the predominant product is the gas fraction, which accounts for 85% [Malińska et al, 2014]. The fast pyrolysis process takes place under conditions of rapid temperature rise (> 103 °C•s -1 ) and short reaction time (< 2 s) with rapid cooling of volatiles leading to the formation of biooil and biochar as an intermediate [Zhao et al, 2020]. In addition, catalysts and microwave assistance are often used in the thermal conversion of biomass to improve product distribution and quality [Lu et al, 2021;Zulkornain et al, 2022].…”

Section: Conditions For the Formation Of Biochar By Pyrolysismentioning

confidence: 99%

Analysis of the Use of Biochar from Organic Waste Pyrolysis in Agriculture and Environmental Protection

Niedziński¹,

Labetowicz²,

Stępień³

et al. 2023

J. Ecol. Eng.

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Nowadays, research on the use of pyrolysis products in the broadly understood economy is widely conducted in the world. This publication presents the results of research on the use of biochar primarily as a material for use in agriculture and environmental protection. In particular, its use to improve soil properties and as a component of organic fertilisers or composts, as well as an ingredient for animal bedding in livestock buildings or an additive for silage is discussed. In addition, the possibilities of using biochar in the energy sector as a solid fuel and in the broader field of environmental protection for remediation of contaminated land, for carbon sequestration and as a raw material for the production of activated carbons are discussed.

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“…Co-pyrolysis includes the devolatilization of biomass and coal to form coke, tar and gases, resulting in solid-gases and gases-tar reactions [16][17][18]. The high hydrogen content indicates that biomass could act as a hydrogen donor in co-pyrolysis with coal [6,19,20]. Hence, co-pyrolysis of coal and biomass can not only pave the theoretical support for greater efficiency with better utilization of biomass and coal, but also reduce the activation energy of the reaction for co-pyrolysis of coal and biomass [21,22], which are conducive to industrializing and large-scale development.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effects between Lignin, Cellulose and Coal in the Co-Pyrolysis Process of Coal and Cotton Stalk

et al. 2023

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In this work, Qiqunahu (QQH) coal, cotton stalk, cellulose and lignin extracted from cotton stalk were selected as raw materials to study the effects of the co-pyrolysis of coal and cotton stalk. Online thermogravimetric mass spectrometry (TG-MS) was used to analyse mass loss and gas release characteristics during co-pyrolysis. The results reveal that the mixture of cotton stalk and coal can significantly enhance the reactivity of the blends and promote the formation of effective gas. The cellulose in the cotton stalk promotes the generation of H2 and CO2 during the co-pyrolysis of coal and cotton stalks. Lignin promotes the production of CH4 and CO2. Cellulose and lignin show an inhibitory effect on the precipitation of small molecular weight hydrocarbon gases during co-pyrolysis. This study provides a better understanding for the co-pyrolysis of biomass and coal.

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Synergistic effect of mixing wheat straw and lignite in co-pyrolysis and steam co-gasification

Cited by 35 publications

References 46 publications

Gasification Performance of Barley Straw Waste Blended with Lignite for Syngas Production under Steam or Carbon Dioxide Atmosphere

Gasification Performance of Barley Straw Waste Blended with Lignite for Syngas Production under Steam or Carbon Dioxide Atmosphere

Analysis of the Use of Biochar from Organic Waste Pyrolysis in Agriculture and Environmental Protection

Synergistic Effects between Lignin, Cellulose and Coal in the Co-Pyrolysis Process of Coal and Cotton Stalk

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