Pyrolysis characteristics of lignocellulosic biomass components in the presence of CaO

Chen, Xu; Li, Shujuan; Liu, Zihao; Chen, Yingquan; Yang, Haiping; Wang, Xianhua; Che, Qingfeng; Chen, Wei; Chen, Hanping

doi:10.1016/j.biortech.2019.121493

Cited by 127 publications

(44 citation statements)

References 34 publications

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“…Subsequently, the catalytic co-pyrolysis of GSs and WTs using low-cost Ca-based materials was studied at TRL-5. We would point out here that a ratio (GSs + WTs) to catalyst of 2 was selected, since we had previously observed that higher catalyst ratios excessively promoted cracking reactions, leading to the formation of undesired heavy condensable organic compounds [49,50]. On the other hand, the use of lower catalyst proportions in the feedstock hardly affected process performance compared to the non-catalytic test.…”

Section: Product Yieldsmentioning

confidence: 99%

Ca-based Catalysts for the Production of High-Quality Bio-Oils from the Catalytic Co-Pyrolysis of Grape Seeds and Waste Tyres

et al. 2019

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The catalytic co-pyrolysis of grape seeds and waste tyres for the production of high-quality bio-oils was studied in a pilot-scale Auger reactor using different low-cost Ca-based catalysts. All the products of the process (solid, liquid, and gas) were comprehensively analysed. The results demonstrate that this upgrading strategy is suitable for the production of better-quality bio-oils with major potential for use as drop-in fuels. Although very good results were obtained regardless of the nature of the Ca-based catalyst, the best results were achieved using a high-purity CaO obtained from the calcination of natural limestone at 900 °C. Specifically, by adding 20 wt% waste tyres and using a feedstock to CaO mass ratio of 2:1, a practically deoxygenated bio-oil (0.5 wt% of oxygen content) was obtained with a significant heating value of 41.7 MJ/kg, confirming its potential for use in energy applications. The total basicity of the catalyst and the presence of a pure CaO crystalline phase with marginal impurities seem to be key parameters facilitating the prevalence of aromatisation and hydrodeoxygenation routes over the de-acidification and deoxygenation of the vapours through ketonisation and esterification reactions, leading to a highly aromatic biofuel. In addition, owing to the CO2-capture effect inherent to these catalysts, a more environmentally friendly gas product was produced, comprising H2 and CH4 as the main components.

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Section: Product Yieldsmentioning

confidence: 99%

Ca-based Catalysts for the Production of High-Quality Bio-Oils from the Catalytic Co-Pyrolysis of Grape Seeds and Waste Tyres

et al. 2019

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“…Fig. 5 and Table 4 show that the organic fraction of non-catalytic wood derived bio-oil consists mainly of mono and polycyclic aromatic hydrocarbons, their isomers, such as, indene, fluorene, pyrene etc., with few compounds of phenols (see peaks 7,11,12,14,16,18), furans (see peaks 19, 20, 25, 38), and an acid (see peak 8). The explanation for the elimination of the majority of the oxygenated compounds typically found in wood derived bio-oil was due to the catalytic effect of wood derived char, which was formed in the lower zone of the reformer during the non-catalytic wood run.…”

Section: Bio-oilmentioning

confidence: 99%

“…As it was mentioned, previous work has shown that DIS char was mainly composed of calcium carbonate. Research has explored the importance of CaO as a catalyst in biomass gasification and pyrolysis [11][12][13][14][15][16]. It is well-known that compounds of alkali and alkaline earth metals (AAEMs) are active catalysts for bio-oil upgrading, as well as, for tar cracking in gasification [17].…”

Section: Introductionmentioning

confidence: 99%

Demonstration of catalytic properties of de-inking sludge char as a carbon based sacrificial catalyst

Fivga

Jahangiri

Bashir

et al. 2020

Journal of Analytical and Applied Pyrolysis

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Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document. When citing, please reference the published version. Take down policy While the University of Birmingham exercises care and attention in making items available there are rare occasions when an item has been uploaded in error or has been deemed to be commercially or otherwise sensitive.

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“…CLG has attracted wide attention in the literature 7‐24 . The main reactions involved are shown in Table 1 5,6 .…”

Section: Introductionmentioning

confidence: 99%

Promoted calcium looping H ₂ production via catalytic reforming of polycyclic aromatic hydrocarbon using a synthesized CO ₂ absorbent prepared by impregnation

Han

et al. 2021

Int J Energy Res

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Summary Promoting multicycle CO2 absorption ability and mechanical strength while enhancing heavy tar elimination performance of calcium‐based absorbents is a significant challenge for calcium looping gasification (CLG). A synthesized absorbent Fe/Ca‐Al was developed by an impregnation method consisting of two steps, during which an inert support and an iron catalytic component were integrated with calcium oxide (CaO). Fe/Ca‐Al was compared with three other candidate absorbents in terms of their basic properties and performances. Results indicated that the major components of the synthesized Fe/Ca‐Al were CaO, mayenite (Ca12Al14O33), and Ca2Fe2O5. The CO2 absorption ability of Fe/Ca‐Al gradually increased within 10 carbonation–calcination cycles and the mechanical strength was apparently promoted by the component Ca12Al14O33. Fe/Ca‐Al approached the largest conversion for the heavy tar model component 1‐methylnaphthalene (70.6%), the highest H2 yield (0.18 mol/[hr·g]), and the least coke deposition (8.18 mg/g) during reforming. The synergistic effects of Ca12Al14O33 and Ca2Fe2O5 on the performance of Fe/Ca‐Al were analyzed. The effects of the mass ratio Fe/CaO, temperature of reforming reaction, molar ratio of S/C in tar, and the absorbent particle size on the reforming performance of heavy tar were also explored. The results of this study should provide useful information and possible solutions for CLG to overcome development obstacles. Novelty Statement The present work simultaneously addresses the key challenges of CaO‐based absorbents, including not only cyclic carbonation reactivity and mechanical strength of the absorbents but also heavy tar reduction performance and the influence of different reaction conditions, which are rarely reported in the literature. A synthesized iron‐calcium absorbent is developed by a two‐step impregnation method, which is beneficial to enhance biomass heavy tar (such as PAH) reduction, cyclic CO2 capture, and mechanical strength of the absorbent for hydrogen production in calcium looping gasification.

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Pyrolysis characteristics of lignocellulosic biomass components in the presence of CaO

Cited by 127 publications

References 34 publications

Ca-based Catalysts for the Production of High-Quality Bio-Oils from the Catalytic Co-Pyrolysis of Grape Seeds and Waste Tyres

Ca-based Catalysts for the Production of High-Quality Bio-Oils from the Catalytic Co-Pyrolysis of Grape Seeds and Waste Tyres

Demonstration of catalytic properties of de-inking sludge char as a carbon based sacrificial catalyst

Promoted calcium looping H ₂ production via catalytic reforming of polycyclic aromatic hydrocarbon using a synthesized CO ₂ absorbent prepared by impregnation

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Pyrolysis characteristics of lignocellulosic biomass components in the presence of CaO

Cited by 127 publications

References 34 publications

Ca-based Catalysts for the Production of High-Quality Bio-Oils from the Catalytic Co-Pyrolysis of Grape Seeds and Waste Tyres

Ca-based Catalysts for the Production of High-Quality Bio-Oils from the Catalytic Co-Pyrolysis of Grape Seeds and Waste Tyres

Demonstration of catalytic properties of de-inking sludge char as a carbon based sacrificial catalyst

Promoted calcium looping H 2 production via catalytic reforming of polycyclic aromatic hydrocarbon using a synthesized CO 2 absorbent prepared by impregnation

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Promoted calcium looping H ₂ production via catalytic reforming of polycyclic aromatic hydrocarbon using a synthesized CO ₂ absorbent prepared by impregnation