Catalytic fast pyrolysis of biomass impregnated with K3PO4 to produce phenolic compounds: Analytical Py-GC/MS study

Lü, Qiang; Zhang, Zhibo; Yang, Xinyu; Chen, Dong; Zhu, Xun

doi:10.1016/j.jaap.2013.08.011

Cited by 115 publications

(41 citation statements)

References 38 publications

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“…In addition, previous study has shown that drying and dehydration reactions during torrefaction reduced generation of water in subsequent microwave pyrolysis (Zheng et al, 2013). It is known that the GC/MS technique could not give the quantitative analysis of the pyrolytic products, however, the chromatographic peak area% is linear with its content (Lu et al, 2013). The relative contents of different groups of liquid products from microwave pyrolysis of original and pretreated rice husk samples are presented in Fig.…”

Section: Influence Of Pretreatment On Liquid Productsmentioning

confidence: 99%

Effects of water washing and torrefaction pretreatments on rice husk pyrolysis by microwave heating

Zhang

Dong

Zhang

et al. 2015

Bioresource Technology

124

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Section: Influence Of Pretreatment On Liquid Productsmentioning

confidence: 99%

Effects of water washing and torrefaction pretreatments on rice husk pyrolysis by microwave heating

Zhang

Dong

Zhang

et al. 2015

Bioresource Technology

124

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“…In order to overcome this problem, selective pyrolysis of biomass to produce special bio-oils rich in target chemicals has gained increased attention in recent years. Different selective pyrolysis techniques have been proposed to produce valuable chemicals, such as 1-hydroxy-3,6-dioxabicyclo[3.2.1]octan-2-one (LAC) [9,10], furfural (FF) [11][12][13][14], 4-vinyl phenol [15], crotonic acid [16], methanol [17], light furan compounds [18], anhydrooligosaccharides [19], phenolic compounds [20][21][22][23], aromatic hydrocarbons [24][25][26][27], olefins [28], etc. Despite these pioneering techniques, selective pyrolysis of biomass is still in its early stage of development.…”

Section: Introductionmentioning

confidence: 99%

Selective Production of Levoglucosenone from Catalytic Fast Pyrolysis of Biomass Mechanically Mixed with Solid Phosphoric Acid Catalysts

Zhang

Lü

et al. 2015

Bioenerg. Res.

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Solid phosphoric acid (SPA) catalysts with different carriers were prepared and used for catalytic fast pyrolysis of poplar wood to produce levoglucosenone (LGO), a valuable anhydrosugar derivative that can be used in various organic synthesis applications. Pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) experiments were performed to evaluate the catalytic capabilities of these catalysts under different reaction conditions. The results indicated that SPA catalyst prepared with the SBA-15 carrier exhibited the best catalytic capability for selectively producing LGO. Both the catalytic pyrolysis temperature and catalyst-to-biomass ratio affected the pyrolytic products greatly. The maximal LGO yield reached as high as 8.2 wt% from poplar wood, obtained at the pyrolysis temperature of 300°C and the catalyst-to-biomass ratio of 1. The by-products during the catalytic pyrolysis process were mainly acetic acid (AA) and furfural (FF). In addition, the SPA catalyst possessed better catalytic capability than the liquid phosphoric acid (H 3 PO 4 ) catalyst to produce LGO.

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“…During the pyrolysis of lignin or biomass, especially during the fast pyrolysis process, a lot of aromatic compounds (mainly phenolics) will be formed, and they are valuable compounds that cover a wide application range [9]. However, mixed phenolic compounds will be formed during conventional pyrolysis process due to the poor pyrolytic selectivity, and most of the phenolics are in very low contents, making the recovery of individual phenolic compounds very difficult [10][11][12]. Mechanism studies on lignin pyrolysis can help clarify the key reactions involved in the formation of different phenolic compounds and contribute to the development of selective pyrolysis techniques for the target products.…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis mechanism of a β-O-4 type lignin dimer model compound

Zhang

Jiang

et al. 2015

J Therm Anal Calorim

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To help understand the pyrolysis mechanism of lignin, a non-phenolic lignin dimer model compound with b-O-4 linkage, namely 1-methoxy-2-(4-methoxyphenethoxy) benzene, was prepared. Its pyrolysis mechanism was investigated by density functional theory calculations and confirmed by the analytical pyrolysis-gas chromatography/mass spectrometry experiments. Possible pyrolytic pathways were proposed and analyzed based on three initial pyrolysis mechanisms of the model compound, including the C b -O homolytic mechanism, the C a -C b homolytic mechanism and the C b -O concerted decomposition mechanism. The results indicate that the lignin dimer model compound is thermally stable at low pyrolysis temperature (300°C), whereas at moderate pyrolysis temperature (500°C), four major pyrolytic products will be generated via the initial C b -O concerted decomposition and C b -O homolysis, including the 1-methoxy-4-vinylbenzene, 2-hydroxybenzaldehyde, 1-ethyl-4-methoxybenzene and 2-methoxyphenol. Products from the C a -C b homolysis can hardly be formed, due to the high-energy barriers and limitation of the available free hydrogen atoms. Secondary cracking of the primary pyrolytic products will take place to form some light compounds, which will be enhanced with the increase in pyrolysis temperature.

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Catalytic fast pyrolysis of biomass impregnated with K3PO4 to produce phenolic compounds: Analytical Py-GC/MS study

Cited by 115 publications

References 38 publications

Effects of water washing and torrefaction pretreatments on rice husk pyrolysis by microwave heating

Effects of water washing and torrefaction pretreatments on rice husk pyrolysis by microwave heating

Selective Production of Levoglucosenone from Catalytic Fast Pyrolysis of Biomass Mechanically Mixed with Solid Phosphoric Acid Catalysts

Pyrolysis mechanism of a β-O-4 type lignin dimer model compound

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