Synthesis of iron nanoparticles-based hydrochar catalyst for ex-situ catalytic microwave-assisted pyrolysis of lignocellulosic biomass to renewable phenols

Dai, Leilei; Zeng, Zihong; Yang, Qi; Yang, Sha; Wang, Yunpu; Liu, Yuhuan; Ruan, Roger; He, Chao; Yu, Zhenting; Jiang, Lin

doi:10.1016/j.fuel.2020.118532

Cited by 52 publications

(14 citation statements)

References 59 publications

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“…The oxidation of metal species was also observed in the case of Fe/hydrochar catalysts used in ex situ microwave-assisted pyrolysis of rice husk and corn cob [64]. α-Fe and Fe 3 C phases present on the catalyst surface were completely oxidized to Fe 3 O 4 during the reaction, which led to the decrease in the activity of the catalyst.…”

Section: Zsm-5 and Mgomentioning

confidence: 83%

Catalyst Stability—Bottleneck of Efficient Catalytic Pyrolysis

Grams

Ruppert

2021

Catalysts

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The pyrolysis of lignocellulosic biomass is one of the most promising methods of alternative fuels production. However, due to the low selectivity of this process, the quality of the obtained bio-oil is usually not satisfactory and does not allow for its direct use as an engine fuel. Therefore, there is a need to apply catalysts able to upgrade the composition of the mixture of pyrolysis products. Unfortunately, despite the increase in the efficiency of the thermal decomposition of biomass, the catalysts undergo relatively fast deactivation and their stability can be considered a bottleneck of efficient pyrolysis of lignocellulosic feedstock. Therefore, solving the problem of catalyst stability is extremely important. Taking that into account, we presented, in this review, the most important reasons for catalyst deactivation, including coke formation, sintering, hydrothermal instability, and catalyst poisoning. Moreover, we discussed the progress in the development of methods leading to an increase in the stability of the catalysts of lignocellulosic biomass pyrolysis and strengthening their resistance to deactivation.

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Section: Zsm-5 and Mgomentioning

confidence: 83%

Catalyst Stability—Bottleneck of Efficient Catalytic Pyrolysis

Grams

Ruppert

2021

Catalysts

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“…Among them, tailor-made metal-based catalysts for biomass pyrolysis to specific products have become a hot topic of current research. 140,[215][216][217] Nevertheless, most research on metal-based catalysts in the field of biomass pyrolysis only focus on the preparation of catalysts and their catalytic effects on pyrolysis products. There are few in-depth discussions and further studies regarding the catalytic mechanisms of tailormade design catalysts for specific products.…”

Section: Discussionmentioning

confidence: 99%

“…136,137 For example, in a previous study for ketonization of fast pyrolysis oil derived oxygenates, Weber et al 136,137 found that when the magnetite content in red mud catalysts increased from 45% to 86%, the conversion rate of acetic acid increased from 0 to 0.751 mol mol −1 fed . Besides, many studies have shown that Fe-based catalysts have good selectivity for phenols, [140][141][142] while density functional theory (DFT) has been used to study the adsorption of phenol on the surface of a single metal Fe 0 ; it has been found that Fe has a good ability to cleave the C-O bond in phenols, which may lead to high selectivity of Fe for aromatics. 143 The contradiction between these two opinions may be due to the fact that Fe rarely exists in the form of Fe 0 in the catalyst.…”

Section: Fementioning

confidence: 99%

Research progress on the role of common metal catalysts in biomass pyrolysis: a state-of-the-art review

et al. 2022

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“…However, the bio-oil obtained by MAP of CS still contains considerable oxygen content (29.5 wt.%), which will inevitably lead to the generation of organic compounds with high oxygen contained in the pyrolysis organisms, among which phenols are the representative ( Ferrera-Lorenzo et al, 2014b ). For example, Dai et al ( Dai et al, 2020 ) prepared phenol-rich bio-oil by catalytic pyrolysis of corn cob with supported catalyst containing iron, and the phenol content reached 49.7 area% and the yield of bio-oil was 26.9 wt.%. By adjusting the composition of the catalyst and the reaction conditions, the selectivity reached 91.1 area%.…”

Section: Introductionmentioning

confidence: 99%

Selective Production of Phenol-Rich Bio-Oil From Corn Straw Waste by Direct Microwave Pyrolysis Without Extra Catalyst

Zhao

Jiang

et al. 2021

Front. Chem.

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We report a sustainable strategy to cleanly address biomass waste with high-value utilization. Phenol-rich bio-oil is selectively produced by direct pyrolysis of biomass waste corn straw (CS) without use of any catalyst in a microwave device. The effects of temperature and power on the yield and composition of pyrolysis products are investigated in detail. Under microwave irradiation, a very fast pyrolysis rate and bio-oil yield as high as 46.7 wt.% were obtained, which were competitive with most of the previous results. GC-MS analysis showed that temperature and power (heating rate) had great influences on the yield of bio-oil and the selectivity of phenolic compounds. The optimal selectivity of phenols in bio-oil was 49.4 area% by adjusting the operating parameters. Besides, we have made detailed statistics on the change trend of some components and different phenols in bio-oil and given the law and reason of their change with temperature and power. The in situ formed highly active biochar from CS with high content of potassium (1.34 wt.%) is responsible for the improvement of phenol-rich oils. This study offers a sustainable way to fully utilize biomass waste and promote the achievement of carbon neutrality.

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Synthesis of iron nanoparticles-based hydrochar catalyst for ex-situ catalytic microwave-assisted pyrolysis of lignocellulosic biomass to renewable phenols

Cited by 52 publications

References 59 publications

Catalyst Stability—Bottleneck of Efficient Catalytic Pyrolysis

Catalyst Stability—Bottleneck of Efficient Catalytic Pyrolysis

Research progress on the role of common metal catalysts in biomass pyrolysis: a state-of-the-art review

Selective Production of Phenol-Rich Bio-Oil From Corn Straw Waste by Direct Microwave Pyrolysis Without Extra Catalyst

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