Furan Products Research Articles

Control Formation of Furans and Pyrazines Resulting from Dual Glycation Sites in Nα,Nε-Di(1-deoxy-d-xylulos-1-yl)lysine via Elevating Thermal Degradation Temperatures.

Lysine (Lys) glycated by xylose (Xyl) at α-NH2 [Nα(1-deoxy-D-xylulos-1-yl)lysine (Nα-Xyl-Lys ARP)] or ε-NH2 [Nε-(1-deoxy-D-xylulos-1-yl)lysine (Nε-Xyl-Lys ARP)] significantly impacted the thermal degradation pathways of Amadori rearrangement products (ARPs). Nα-Xyl-Lys ARP was found to undergo retro-aldolization on the sugar fragment more readily to form glyoxal/methylglyoxal than Nε-Xyl-Lys ARP. Furans and pyrazines formation during the degradation of the diglycated lysine [Nα,Nε-di(1-deoxy-d-xylulos-1-yl)lysine (Nα,Nε-di-Xyl-Lys ARP)] was delayed at 120 °C relative to Nε-Xyl-Lys ARP. This was attributed to the complex degradation of Nα,Nε-di-Xyl-Lys ARP, which slowed the substantial formation of deoxypentosones and the effective release of Lys. At 140 °C, the dual glycated Nα,Nε-di-Xyl-Lys ARP was more conducive to promoting the redistribution of electrons and facilitating molecular rearrangement. This accelerated the efficient decomposition of dual glycated groups in Nα,Nε-di-Xyl-Lys ARP and enabled glyoxal to actively participate in Strecker degradation. Thus, the production of furans and pyrazines was substantially increased, and the variety of pyrazines was expanded from three types to eight types. An appropriate increase to pH 7.5 effectively avoided the overprotonation of hydroxyl and amino groups (pH 5.5), simultaneously enhancing furans and pyrazines yield while minimizing the formation of pyridines under alkaline conditions.

Highly Efficient Production of Furfural from Corncob by Barley Hull Biochar-Based Solid Acid in Cyclopentyl Methyl Ether–Water System

Furfural, an important biobased compound, can be synthesized through the chemocatalytic conversion of D-xylose and hemicelluloses from lignocellulose. It has widespread applications in the production of valuable furans, additives, resins, rubbers, synthetic fibers, polymers, plastics, biofuels, and pharmaceuticals. By using barley hulls (BHs) as biobased support, a heterogeneous biochar Sn-NUS-BH catalyst was created to transform corncob into furfural in cyclopentyl methyl ether–H2O. Sn-NUS-BH had a fibrous structure with voids, a large comparative area, and a large pore volume, which resulted in more catalytic active sites. Through the characterization of the physical and chemical properties of Sn-NUS-BH, it was observed that the Sn-NUS-BH had tin dioxide (Lewis acid sites) and a sulfonic acid group (Brønsted acid sites). This chemocatalyst had good thermostability. At 170 °C for 20 min, Sn-NUS-BH (3.6 wt%) was applied to transform 75 g/L of corncob with ZnCl2 (50 mM) to generate furfural (80.5% yield) in cyclopentyl methyl ether–H2O (2:1, v/v). This sustainable catalytic process shows great promise in the transformation of lignocellulose to furfural using biochar-based chemical catalysts.

Enhanced selectivity in the production of furans/olefins through ex-situ catalytic pyrolysis over metal-modified TS-1

Catalytic pyrolysis technology is one of the most environmental and efficient approach in converting biomass waste into high-value chemicals and fuels. In this study, the ex-situ catalytic pyrolysis of cellulose to produce furans and olefins was reported using various metal-loaded TS-1 as catalysts. The experimental results showed that the Au/TS-1 exhibited an exceptional catalytic activity in the production of furans and olefins, achieving a selectivity of 49.17 % and 40.65 %, respectively. Ni/TS-1 effectively promoted the formation of ethylene, yielding a selectivity of 97.49 % and a yield of 6.11 C-mol%. Under the optimized conditions: pyrolysis temperature of 550 ℃, catalytic temperature of 600 ℃, and catalyst to cellulose mass ratio of 20:1, the Au/TS-1 catalyst achieved a furans selectivity of 41.91 % with a yield of 11.94 C-mol%, while olefins selectivity and yield were 49.84 % and 18.99 C-mol%, respectively. At this condition, Au/TS-1 still has excellent catalytic activity after 10 cycles and has good catalytic effect towards different biomass feedstocks. Furthermore, the possible mechanism to produce furans and olefins was revealed. This research offers valuable insights for guiding the directed conversion of biomass into value-added chemicals, paving the way for a more sustainable future.

Microwave-enhanced pyrolysis of bamboo for furfural-rich bio-oil production over WS2 catalyst

The efficient utilization of bamboo waste has attracted increasing interest as a promising solution to address the challenges associated with climate change and promote a more environmentally friendly approach to resource utilization. Herein, we demonstrated the highly selective production of furfural from bamboo through a microwave-assisted pyrolysis (MAP) process using WS2 catalysts. Firstly, the content of furfural can be precisely regulated by manipulating key process conditions such as microwave power, temperature and the mass ratio of WS2 to bamboo. Notably, compared to non-catalyzed MAP, the presence of the WS2 catalyst significantly enhanced the production of both furfural and furan components. The optimal content of furfural and furan components reached up to 66.9 area% and 75.6 area% in bio-oil under the conditions of 700 W, 400 °C and a 3:10 WS2 to bamboo ratio for 15 min. Furthermore, the liquid oil mainly consisted of C5 and C6 products (86.5 area%), indicating that MAP enhances the selectivity of small molecular products and furan compounds when coupled with the WS2 catalyst. Experimental results revealed that WS2 played bifunctional roles as a microwave absorbent and catalyst, promoting the bio-oil content and limiting the secondary pyrolysis of furan components, leading to a high selectivity of furan and a high content of furan products. This work provides valuable insights into producing furan-rich bio-oil from bamboo through MAP over transition metal dichalcogenides materials.

Production and recovery system for furan compounds from rice straw using an ionic liquid (1-methylimidazolium hydrogen sulfate) and vacuum steam distillation

Furan compounds, including 5-hydroxymethylfurfural and furfural, can be synthesized from biomass and have garnered attention for their potential applications in biofuels and resin precursors. In this study, the synthesis of the furan compounds from rice straw was explored using a combined approach of ionic liquid treatment, specifically 1-methylimidazolium hydrogen sulfate ([MIM]HSO4), and vacuum steam distillation. Through the optimization of various processing parameters, we established that the best conditions for the furan compound production include: a cold trap cooling temperature of – 196 ℃, a system pressure of 10 hPa, a treatment temperature of 180 ℃, a reaction duration of 30 min, a sample loading of 1wt%, and a particle size range of 45–90 µm. Under these conditions, the resultant yield of the furan compounds was quantified at 27.9wt%. Additionally, the recyclability of the utilized ionic liquid was evaluated. Notably, even after four recycling cycles (encompassing a total of five reactions), the yield of the furan compounds remained consistent, underscoring the viability of ionic liquid reuse.

Efficient production of furans by CO2-assisted pyrolysis of cellulose with carbon-supported Ni/Co catalysts

Production of high-grade bio-oil through catalytic pyrolysis technology was of great significance for alleviating the current energy shortage problem. This study synthesized a series of carbon-supported transition metal catalysts and their catalytic influence on the product distribution, behavior and liquid component during cellulose pyrolysis in N2 and CO2 atmosphere were analyzed. The obtained results indicated that the unique flower-like structure of carbon significantly elevated strengths to generate gaseous products and the enrichment of furan compounds during pyrolysis. The inclusion of CO2 further enhanced the secondary reaction of liquid product, and the maximum increment of syngas yield was 14.50 wt% after adding Ni/Co–C catalyst. Moreover, CO2 participated in thermal conversion process of biomass as an oxygen source and thus more sugars were converted into furans. The Ni/Co–C catalyst and CO2 produced favorable synergistic effect during cellulose pyrolysis, which resulted in the highest relative content of furans, with the value of 26.77%. Therefore, this study presented an efficient means to access to furan-rich bio-oil via catalytic pyrolysis of biomass.

Production and Synthetic Possibilities of 5-Chloromethylfurfural as Alternative Biobased Furan

As fossil-based resource depletion intensifies and the use of lignocellulosic biomass gains more and more momentum for the development of biorefineries, the production of furans has received a great deal of attention considering their outstanding synthetic possibilities. The production of 5-hydroxymethylfurfural (HMF) is quite established in the recent scientific literature, with a large number of studies having been published in the last few years. Lately, there has been a growing interest in the synthesis of 5-chloromethylfurfural (CMF) as a novel building block of similar molecular structure to that of HMF. CMF has some advantages, such as its production taking place at milder reaction conditions, a lower polarity that enables easier separation with the aid of organic media, and the presence of chlorine as a better leaving group in synthesis. Precisely the latter aspect has given rise to several interesting products to be obtained therefrom, including 2,5-dimethylfuran, 2,5-furandicarboxylic acid, and 5-methylfurfural, to name a few. This work covers the most relevant aspects related to the production of CMF and an array of synthetic possibilities. Through varied catalysts and reaction conditions, value-added products can be obtained from this chemical, thus highlighting the advances in the production and use of this chemical in recent years.

Application of zeolites for the production of biofuels and furans from hexose sugars in ethanol

The use of zeolites as catalysts in the transformation of glucose and 5-hydroxymethylfurfural (HMF) into 5-ethoxymethylfurfural (EMF) was evaluated. The behaviour of the catalysts could be explained by their morphology, composition, acid properties and chemical coordination of the active sites. The progress of the reaction was followed by High Performance Liquid Chromatography (HPLC) and 13C Nuclear Magnetic Resonance (NMR). Several intermediates were identified, and a reaction path is proposed. Different cosolvents were also employed in this study to enhance the selectivity towards different possible valuable compounds, and they were found to have a positive influence for the production of EMF and furfural.

The Potential of Platanus orientalis L. Bark for High-Grade Resource Utilization

Forest wood biomass can be used as a renewable resource for the sustainable production of fuels and chemicals. In this study, the methanol, methanol/ethanol, and ethanol/benzene solvent extracts of Platanus orientalis L. bark were analyzed using FTIR, IH NMR, 13C NMR, 2D-HSQC NMR, GC-MS, and TOF-LC-MS. The results revealed that the bark of Planus orientalis contained a wide variety of chemical compounds, such as 30-triacontanol, 1-Hexanol, hexadecanoic acid, methyl ester, 2-ethyl-, γ-Sitosterol, and 3,4,5-tri methoxy-Phenol. In addition, the fast pyrolysis of P. orientalis L. bark (POL-B) with nano-catalysts (Co3O4, Fe2O3, and Co3O4/Fe2O3) was investigated using pyrolysis/gas chromatography/mass spectrometry (Py-GC/MS) and a thermogravimetric analyzer coupled with an FTIR spectrophotometer (TG-FTIR). The TG results revealed that the nano-catalysts significantly affected the pyrolysis of P. orientalis bark. The nano-Fe2O3 catalyst was shown to increase acid and ketone compound production during the catalytic pyrolysis of cellulose. According to the Py-GC-MS results, the pyrolytic products contained several value-added chemicals and high-quality bio-oil. The nano-catalysts promoted the production of aromatics, phenols, ketones, olefins, furans and alkane compounds. These natural-product active molecules and bio-oil, as high-grade raw materials, could be used in many industrial and agricultural fields for the production of wetting agents, stabilizers, plasticizers and resins. In addition, a number of active molecules could be used as drugs and biomedical active ingredients for anti-cancer and anti-inflammatory purposes.

Glycerol-based liquefied palm kernel shell product and its blend with citric acid as bio-based wood adhesive

Concerns for the environment and for human health have become critical factors that motivate creating bio-based wood adhesives. Therefore, this study proposes replacing toxic chemicals with alternative adhesives. In the first step, glycerol was added to the natural phenolic compounds from liquefaction of palm kernel shell (PKS), having a high content of lignin. The obtained glycerol-based liquefied PKS, and its blend with citric acid, were tested for bonding in a study on the effects of hot-pressing conditions (temperature and time). The results revealed that the liquefaction system in this study achieved an 83% conversion of the PKS components into glycerol-based liquefaction. According to the Fourier transform infrared and carbon-13 nuclear magnetic resonance analyses, the glycerol-based PKS contained lignin derivatives and furan products. This accounted for its great performance in bonding rubberwood veneers. The tensile shear strength was improved by blending with 15% citric acid, especially when applying the high 190 °C pressing temperature for 15 min.

Fe(CO)5-catalyzed oxidative photolytic cyclization of ferrocenated en-yne-aldehydes: Synthesis of ferrocene appended furans

En-yne-aldehydes are important organic motifs due to having a high synthetic potential of cyclization. Herein, the ferrocenated en-yne-aldehydes were successfully transformed into ferrocene appended furans by oxidative, photolytic exo-cyclic ring closure reaction in the presence of an earth-abundant metal catalyst, i.e., iron pentacarbonyl. Along with the formation of the furan ring, the carbon adjacent to furan gets oxidized into a carbonyl group. The transformation takes just 30 min to accomplish the desired product. The formation of these unusual ferrocene appended furan products were confirmed by single crystal X-Ray diffraction studies, FTIR, 1H & 13C NMR, and HRMS spectrometry. The general scope of the reaction was established and a library of 11 new ferrocene-appended furan products were developed. Here, the established reaction protocol was found to be active for aryl, alkyl, cycloalkyl, and ferrocenyl-substituted ene-yne-aldehydes and produced good to significant yield of the respective furan products. To the best of our minds, this report serves as the first example of iron-catalyzed photolytic oxidative cyclization of ferrocenated en-yne-aldehydes, and the products are first time reported in this report.

NiSn intermetallic nanoparticles with geometrically isolated Ni sites for selective C-O cleavage of furfural

Selective C-O bond cleavage is critical in upgrading biomass derivatives to chemicals and fuels. However, eliminating side reactions from the aromatic rings is challenging, in large part because of the difficulty in precisely modulating the local atomic structure of the active sites. Herein, we report a Ni3Sn intermetallic nanoparticle with geometrically isolated Ni sites for hydrodeoxygenation of furfural, which shows considerable activity and 91 % selectivity toward 2-methylfuran at 96 % conversion, in stark contrast to the performance of Ni nanoparticle that mainly produces furan, CH4 and C4 products derived from the ring chemistry. Experimental and theoretical calculations demonstrate that the isolated Ni sites in Ni3Sn surface limits the furan ring interaction, while the electron donation from Sn to Ni facilitates the carbonyl O bonding to Ni sites. It therefore prevents side reactions from ring chemistry, but allows a facile sequential reaction of selective carbonyl hydrogenation followed by C-OH scission to 2-methylfuran.

Analytical (hydro)pyrolysis of pinewood and wheat straw in chloride molten salts: A route for 2-methyl furan production

2-methyl furan (MF) is a fuel additive with improved fuel characteristics compared to bio-ethanol. Unfortunately, the production of MF (from furfural (FF) hydrogenation) is not economically feasible. Interestingly, molten salts in biomass pyrolysis have shown to promote the formation of furans (mainly FF). Because molten salts hydropyrolysis could be an alternative route to both produce FF and convert it into MF, an assessment is indispensable. Molten salts pyrolysis and hydropyrolysis of pinewood and wheat straw and related model compounds were studied in a micro-reactor. The effect of hydropyrolysis process variables was assessed on the total detectable condensable vapors and MF formation.At low pressures (0.4 MPa), the chloride salts favored the production of FF and acetic regardless of the reaction atmosphere. Under a high pressure of hydrogen though (1.6 and 3.0 MPa), the conversion of FF to MF was enhanced through hydrogenation, hydrodeoxygenation and demethylation reactions. Molten salts hydropyrolysis at 350 °C and pressures of either 1.6 MPa (biomass mass fraction of 0.09) or 3.0 MPa (biomass mass fraction of 0.24) were optimal and yielded ca. 8 wt% to 9 wt% MF. Reaction temperatures >350 °C were unfavorable for the MF yield and instead promoted furfural decarbonylation to furan.

Production of 2-methyl furan, a promising 2nd generation biofuel, by the vapor phase hydrodeoxygenation of biomass-derived furfural over TiO2 supported Cu[sbnd]Ni bimetallic catalysts

This work investigates the vapor phase hydrodeoxygenation (HDO) of FFR to 2-MeF over a series of TiO2-supported mono and bimetallic Cu-Ni catalysts with a fixed Cu content (10 wt%) and varying Ni content (0–20 wt%). The catalysts were synthesized through a simple wet impregnation method, and their properties were studied in depth through an array of analytical techniques such as X-ray diffraction (XRD), H2-temperature programmed reduction (H2-TPR), Scanning Electron Microscopy (SEM), N2-physisorption, Raman spectroscopy, and NH3-temperature programmed desorption (TPD). The catalyst characterizations revealed that the addition of Ni in progressively larger amounts resulted in greater dispersion of Cu species and an increase in the surface area & porosity of the bimetallic catalysts, arising from the strong interactions between NiO and CuO species. Detailed studies were carried out to evaluate the effect of various process parameters such as Ni content, temperature, and contact time on the selectivity of 2-MeF. Ni content of the bimetallic catalysts and temperature played a significant role in product distribution than the contact time. The bimetallic catalyst with the composition 10%Cu-10%Ni was observed to be the optimum, providing a FFR conversion of 100%, and a 2-MeF selectivity of 84.5% at 200 °C, H2/FFR molar ratio = 15, and WHSV = 0.87 gFFR h−1 gcatalayst−1 after 6 h time-on-stream (TOS). During the long-term catalytic activity evaluation, the catalyst exhibited a stable 100% FFR conversion and ∼ 85% selectivity towards 2-MeF over a period of 12 h. Even after a period of 15 h, conversion and selectivity values remained >90% and 70%, respectively.

Improved Light Hydrocarbon, Furans, and BTEX Production from the Catalytic Assisted Pyrolysis of Agave salmiana Bagasse over Silica Mesoporous Catalysts

The pyrolysis of the biomass Agave salmiana bagasse (10 K/min, ambient to 700 °C) was investigated in the absence and presence of Aerosil and MCM-41 catalysts. MCM-41 was synthetized using a typical hydrothermal method and characterized with XRD, SAXS, SEM, TEM, and nitrogen physisorption to confirm the presence of unidimensional 3.4 nm diameter pores. Pyrolysis products were monitored online with mass spectrometry (MS), analyzing the production of 29 different compounds, clustered in several groups, namely, olefins (ethene, 2-butene, 1,3-butadiene), oxygenated compounds (methanol, 2-methylbutanol, acetic acid), furan derivatives (furan, furfural, 2-methylfurane), and aromatic compounds (BTEX). Complete decomposition of the cellulose and hemicellulose content of the biomass was observed at temperatures below 400 °C. Lignin decomposition was completed by 550 °C. Catalyst-assisted pyrolysis showed reduced acetic acid and methanol formation with Aerosil and MCM-41. The use of Aerosil does not affect the overall production of olefins, yet increases benzene yield, while reducing the production of phenol, furan, and furan derivatives. With MCM-41, there is increased production of olefins, furan, furan derivatives, cyclohexanone and BTEX, yet phenol production is decreased. At temperatures below 400 °C, the product formation pattern is comparable to non-catalytic pyrolysis.

Mechanism study on the interaction between holocellulose and lignin during secondary pyrolysis of biomass: In terms of molecular model compounds

A thorough examination of the interaction between holocellulose and lignin during secondary pyrolysis of biomass is essential for the targeted management of pyrolysis products. In this work, the interaction between holocellulose and lignin model compounds was explored utilizing a self-designed micro-pyrolysis device with a U-tube reactor. The content and distribution of liquid/gaseous products were investigated to determine potential interaction reaction routes. Holocellulose-lignin interaction was discovered to enhance the formation of furan products from the ring-opened C5/C6 monomer while blocking its conversion to anhydrous pyranose. The homolysis of methoxy groups on lignin model compounds is important for their interaction with holocellulose. Although phenol is generally stable, the phenolic hydroxyl group boosts the activity of the holocellulose monomer. The holocellulose monomer significantly promotes the cracking of the branched chains of guaiacol and syringol while inhibiting eugenol cleavage. Furfural induces eugenol condensation, resulting in the formation of dimers such as naphthalene and naphthalenol. The interaction between holocellulose monomer and eugenol primarily enhances the carboxylation of eugenol vinyl groups to generate aromatic acid compounds. The finding improves knowledge of the interactions that occur during secondary pyrolysis of biomass.

Effect of Acid Pretreatment on the Primary Products of Biomass Fast Pyrolysis

A high load of inorganics in raw lignocellulosic biomass is known to inhibit the yield of bio-oil and alter the chemical reactions during fast pyrolysis of biomass. In this study, palm kernel shell (PKS), an agricultural residue from palm oil production, and two other woody biomass samples (mahogany (MAH) sawdust and iroko (IRO) sawdust) were pretreated with distilled water or an acidic solution (either acetic, formic, hydrochloric (HCl) or sulfuric acid (H2SO4)) before fast pyrolysis in order to investigate its effect on the primary products and pyrolysis reaction pathways. The raw and pretreated PKS, MAH and IRO were pyrolysed at 600 °C and 5 s with a micro-pyrolyser connected to a gas chromatograph–mass spectrometer/flame ionisation detector (GC-MS/FID). Of the leaching solutions, HCl was the most effective in removing inorganics from the biomass and enhancing the primary pyrolysis product formed compared to the organic acids (acetic and formic acid). The production of levoglucosan was greatly improved for all pretreated biomasses when compared to the original biomass but especially after HCl pretreatment. Additionally, the relative content of the saccharides was maximised after pretreatment with H2SO4, which was due to the increased production of levoglucosenone. The relative content of the saccharides increased by over 70%. This increase may have occurred due to a possible reaction catalysed by the remaining acid in the biomass. The production of furans, especially furfural, was increased for all pretreatments but most noticeable when H2SO4 was used. However, the relative content of acids and ketones was generally reduced for PKS, MAH and IRO across all leaching solutions. The relative content of the phenol-type compound decreased to a large extent during pyrolysis after acid pretreatment, which may be attributed to dehydration and demethoxylation reactions. This study shows that the production of valuable chemicals could be promoted by pretreatment with different acid solutions.

Aromatics production from segmented co-pyrolysis of poplar sawdust and high-density polyethylene: Enhancing the synergistic effects

Catalytic co-pyrolysis of biomass and plastic waste is a promising approach for producing renewable biofuels and value-added chemicals. However, because of their different pyrolysis behaviors, the synergy between biomass and plastic is limited, and low-yield aromatics are produced. Herein, a modified segmented catalytic co-pyrolysis technology was proposed, and the effects of pyrolysis parameters were studied in detail to enhance the synergistic effect between feedstocks. For the biomass section (segment 1), catalytic fast pyrolysis (CFP) of poplar sawdust was conducted, and results showed that employing 15 wt% MgCl2 at 500 °C facilitated the production of furans. For the plastic section (segment 2), CFP of high-density polyethylene (HDPE) were performed. It was showed that instead of Y and beta zeolites, the utilization of ZSM-5 as a pyrolysis catalyst with a loading of ZSM-5/HDPE = 1.0, and a temperature of 600 °C was beneficial for the production of short-chain olefins. For the segmented co-pyrolysis of poplar sawdust and HDPE (segment 1 + segment 2), the biomass-to-plastic ratio was crucial in aromatics production. A ratio of 1:1 was found to be most effective in producing MAHs (54.8 area%), which was ∼3.9 or 1.6 times that for the separate CFP of biomass or HDPE. This was also consistent with its higher enhancement factor, confirming that the synergy between poplar sawdust and HDPE was dramatically enhanced. Finally, a segmented catalytic co-pyrolysis reaction pathway was proposed.

The weak interaction between polar aprotic solvent and saline water enables efficient production of furans from lignocellulosic biomass

Unlocking the intermolecular weak interaction between bio-solvent γ-valerolactone and saline water, we propose a novel perspective on the production of furans from lignocellulosic biomass in an environmentally benign biphasic system.

Characteristics, kinetics and product distribution on pyrolysis process for waste wind turbine blades

The surge in the number of waste wind turbine blades (WWTB) and improper disposal have resulted in the waste of land resources and potential environmental risks. The pyrolysis characteristics and product distribution of WWTB were discussed by thermogravimetry (TG), pyrolysis with gas chromatography and mass spectrometric (Py-GC/MS), and fixed bed reactor. The kinetic results showed that the average activation energy of WWTB is 125.24 kJ/mol (Flynn Wall Ozawa), 120.45 kJ/mol (Kissinger Akahira Sunose), and 124.66 kJ/mol (Friedman), which was much lower than that of sludge, pine, coal, etc. It indicated that the pyrolysis process of WWTB was more likely to occur with less energy consumption. Furthermore, Py-GC/MS results demonstrated that the carbon chain distribution of primary pyrolysis products was mostly C9–C16 (48.97–72.73 %), including mainly phenolic compounds, alcohols, ketones and carboxylic acids. The higher pyrolysis temperature was beneficial to promote the decarboxylation reaction, decarbonylation reaction and cyclization reaction in the pyrolysis reaction. Subsequently, the results of Py-GC/MS and fixed-bed reactor proved that low-temperature fast pyrolysis can contribute to the directional recovery of phenols such as bisphenol A. High temperature and long residence time would increase the production of aromatics and furans. This study clarified the applicability of pyrolysis for WWTB and provided a reference for the selection of pyrolysis process parameters and the prevention of secondary pollution of pyrolysis.