RENEWABLE ENERGY
·
2025
·
IF 9.1
Zhen He,Quanwei Lv,Xia Jiang,Yang Su,Guangmei Cao,Xianggang Zhang,Lingling Xie,Haijun Wu
The co-pyrolysis of straw and polyethylene (PE) enhances pyrolysis oil quality by reducing oxygenated compounds and increasing hydrocarbons. However, the synergistic mechanisms between straw's main components (cellulose, hemicellulose, and lignin) and PE are not well understood. This study investigated these interactions, revealing a two-stage reaction: cellulose and hemicellulose dominate the first stage, while PE and lignin dominate the second. Significant synergistic effects were observed at 550 °C during the co-pyrolysis of straw and PE, resulting in at least a 17.84 % increase in alkanes and a decrease in oxygenated compounds. Free radicals from PE facilitated the cleavage of carbonyl bonds and promoted deoxygenation, leading to more hydrocarbons. Hemicellulose inhibited ester conversion (ΔV esters = −3.00 %), while lignin suppressed ketone and alcohol formation (ΔV ketones = −12.14 %, ΔV alcohols = −1.07 %). These findings align with straw-PE co-pyrolysis results, providing new insights into the synergistic mechanisms between lignocellulosic biomass and plastics.
研究领域:
能源与环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2018
·
IF 4.908
Dan Luo,Wang Yin,Shengnan Liu,Ning Yang,Shuqian Xia,Peisheng Ma
Pyrolysis oil is a promising material for renewable energy through a hydrogenation process. However, the polymerization, initiated especially by pyrolysis oil water-soluble fraction (PS), is a big hurdle to hydrogenation. The types and structures of the polymerization chemicals, their polymerization mechanisms are very important for upgrading pyrolysis oil. This study firstly compared the polymerization rates of water-soluble fraction (PS) and water-insoluble fraction (PL) by accelerating aging fresh PS and PL at different temperatures (80 °C, 90 °C, 100 °C and 110 °C) for 24 h and at 110 °C for different durations (12 h, 24 h, 36 h, 48 h and 60 h), respectively. The thermogravimetric and differential thermogravimetry analysis results showed that PS polymerized much more rapidly than PL. Then, PS polymerization was further investigated by evaluating the changes in its physical properties (water content, viscosity and element content) and chemical compositions (gas chromatography and liquid chromatogram) before and after aging. The results showed that hydroxy aldehydes and ketones (especially glycoaldehyde, hydroxyacetone and levoglucosan), dicarbonyl compounds (especially succindialdehyde) and α, β-unsaturated carbonyl compounds (especially 3-methyl-2-cyclopenten-1-one and dehydrate resultants of some aldol condensation products) were mainly responsible for PS polymerization.
研究领域:
能源科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Yulin Zhang,Shuo Cheng,Guozhao Ji,Aimin Li
The light fractions of tire pyrolysis oil (TPO) are rich in valuable chemicals, such as limonene, but the utilization of TPO-derived limonene or limonene derivatives was limited by the difficulties to separate limonene from the rest compounds, especially p -cymene which has a similar molecular structure and physical properties (molecular size, melting point and boiling point) as limonene. In order to utilize limonene and separate p -cymene, this study took advantage of the difference in oxidizability between limonene and p -cymene, and proposed a method of epoxidizing TPO before the separation. After epoxidation, limonene was successfully converted into limonene epoxides, while aromatic compounds in TPO such as p -cymene were inert and non-oxidizable. Limonene epoxides have a higher boiling point than p -cymene, so the limonene epoxides can be easily refined by distillation. In order to accelerate the oxidation of limonene, a peroxophosphotungstate catalyst was used as a sustainable solvent-free process. The fraction of TPO between 160 and 190 °C which has 298 g/L limonene was tested in this study. The epoxidation of the TPO 160-190 could reach complete conversion to limonene 1,2-oxides and diepoxide limonene. The resulting oil could be divided into p -cymene enriched fraction and limonene epoxides enriched fraction by simple distillation, and the limonene epoxides enriched fraction contained more than 80% of limonene epoxides. The catalytic mechanism was proposed with the assistance of FT-IR, GC–MS, and 31 P NMR analysis. This work presents a novel strategy of epoxidizing limonene for limonene epoxide and p -cymene separation, which could bring a breakthrough for limonene epoxide and p -cymene production from waste-derived oils.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
REVIEWS ON ADVANCED MATERIALS SCIENCE
·
2024
·Vol. 63
·期 1
·
IF 3.6
Chuangmin Li,Lubiao Liu,Youwei Gan,Qinhao Deng,Shuaibing Yi
This research focuses on the aging resistance properties of asphalt, which are crucial for determining the lifespan of asphalt pavement. To combat aging, waste tire pyrolysis oil (TPO) is often added to asphalt, enhancing its resistance to aging but compromising high-temperature performance. This study offered a pioneering solution by integrating TPO with polyphosphoric acid (PPA) to address these issues. In this study, we conducted a series of tests to characterize the properties of PPA/TPO modified asphalt, including temperature sweep and bending beam rheometer tests. The results demonstrated that the presence of PPA in the PPA/TPO modified asphalt could improve its high-temperature performance while maintaining its low-temperature properties. Moreover, PPA in the PPA/TPO modified asphalt enhanced the modified asphalt’s resistance to fatigue and deformation during the aging process, while the presence of TPO effectively reduced the impact of thermo-oxidative aging on the modified asphalt during the aging process. Additionally, physicochemical interactions between the base asphalt and modifiers were observed before and after aging. In summary, this study had offered an innovative method to enhance the anti-aging properties of asphalt, and had provided more options for sustainable, environmentally friendly roads.
研究领域:
土木工程
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材料科学
✓ 已验证
DOI
高影响因子
FUEL
·
2019
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IF 5.128
Xiaohua Zhang,Hao Ma,Shubin Wu,Weikun Jiang,Weiqi Wei,Ming Lei
Great effort has been exerted to develop better, more effective fractionation techniques and improve the quality of bio-oil. Water extraction can be regarded as an effective method for bio-oil fractionation. In this study, fractionation of pyrolysis oil into water-soluble (WS) and water-insoluble (WI) phases by water extraction was investigated, and the influence of several factors, including water-to-oil ratio and water temperature, on the performance of the method were evaluated via several analytical techniques. When the water-to-oil ratio was 20:1 and the extraction temperature was 20 °C, polar and non-polar components were enriched in the WS (36.56 wt%) and WI (63.44 wt%) phases, respectively. Although extraction temperature had no significant effect on the properties of WS and WI, the distribution of polar and non-polar components was markedly affected by the dispersion and polarity of the compounds. 2D HSQC-NMR results revealed that side chain structures were more sensitive than aromatic structures to temperature. In view of these findings, an effective energy- and resource-saving extraction method featuring a water-to-oil ratio of 20:1 and extraction temperature of 20 °C is recommended for optimal water fractionation of pyrolysis oil.
研究领域:
能源生物学
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分析化学
✓ 已验证
DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
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2022
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IF 8.129
Haisheng Lin,Qingyin Li,Lijun Zhang,Shu Zhang,Xun Hu
The high tendency towards polymerization is a bottle-neck issue in upgrading of bio-oil, which, however, is highly desirable in co-hydrothermal carbonization (HTC) of biomass with bio-oil for enhancing production of hydrochar . In this study, co-HTC of bio-oil of the same origin with poplar sawdust was conducted at 180 to 260 °C. The results showed that the HTC in a water medium containing 10% bio-oil could enhanced the yield of hydrochar by ca. 36% at 220 or 260 °C through the cross-polymerization of the sugar-derived furans and ketones/aldehydes as well as the phenolics in bio-oil with the sawdust-derived organics. Furans/sugars in bio-oil showed much more contribution to the increase of hydrochar yield than the phenolics like guaiacol . The highly reactive organics in bio-oil even could react with the crystal region of cellulose at 180 °C, and affected property of hydrochar at especially the higher temperatures by promoting deoxygenation , enhancing carbonization, eliminating polar functionalities like -OH, retaining C=O for continued polymerization, etc. The co-existence of aliphatic organics and phenolics in bio-oil renders the simultaneous formation of highly volatile fraction and aromatic structures in the hydrochar. These created the carbon-rich hydrochar with higher crystallinity , lower hydrophilicity and improved comprehensive combustion index.
研究领域:
能源与环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Hui Niu,Dengqian Zhang,Yaning Pei,Wei Zhang,Chen Zhang,Cuiqing Li,Long Huang
Catalytic dechlorination of model plastic pyrolytic oil was investigated over different types of zeolites and ion-exchanged 13X zeolites at the low temperatures of 20–120 °C. Among different types of parent zeolites (13X, β, MCM-41), 13X had the highest catalytic dechlorination performance. After ion exchange of 13X with Ag + , its catalytic dechlorination performance was significantly enhanced, and the chlorine removal over Ag-13X reached 97.2 % after reaction for 5 h at 120 °C. The characterization results indicated that the acidity of the zeolite governed its catalytic dechlorination performance, and higher acid amount and stronger acid strength are preferred. Different types of chlorinated compounds followed different dechlorination mechanisms. The primary chlorinated alkanes (e.g., 1-chlorooctane) underwent nucleophilic substitution by the surface –OH groups or H 2 O to form alcohols and HCl, or dehydrochlorination reaction to produce olefins and HCl, while higher chlorinated alkanes with adjacent hydrogen (e.g., chlorocyclohexane) mainly underwent dehydrochlorination reaction to produce olefins and HCl. Chlorinated aromatics (e.g., chlorobenzene) was removed mainly by physical adsorption. Ag-13X showed good stability, and the chlorine removal still retained 72.1 % after 102 h on stream. After four dechlorination-regeneration cycles, the chlorine removal had only a slight decrease due to the partial collapse of its structure and slight loss of its acid amount.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2021
·Vol. 28
·期 36
·50500-50509
·
IF 4.223
He Qian,Huang Shengxiong,Luo Wei,Su Yifeng,Xia Mao,Zhou Nan,Zhou Zhi
In-situ catalytic pyrolysis has simple process configuration and low cost. Ex-situ catalytic pyrolysis can optimize the pyrolysis capacity and upgrade catalysis, and the catalytic can be reused. But there have been few studies researched on compare in-situ and ex-situ catalytic pyrolysis of the OS performed in similar reactor with two kinds of catalytic. This paper study the pyrolysis of oily sludge (OS) uses CaO and oily pyrolysis char as catalytic at 700 °C. Through analysis the pyrolysis oil (PO), pyrolysis solid (PS) and pyrolysis gas (PG) during pyrolysis procedure to research the difference between in-situ and ex-situ catalytic pyrolysis. The gas chromatography-mass spectrometry (GC-MS) results show that CaO was conducive to the synthesis of aromatics, which content more than aliphatics and heterocyclics in CaO-i (i: in-situ) and CaO-e (e: ex-situ) groups. However, char greatly inhibits the production of aromatic compounds and promotes the production of aliphatic compounds. Gas chromatography (GC) results present that the char and CaO can greatly increase the content of combustible gas and the content reach to 85.85%, the pyrolysis gas (PG) keep at the highest combustion performance in char-CaO-i group. Meanwhile, compared with uncatalyzed groups, the content of CH 4 and CO increased about 2.05% and 3.93%, respectively. Fourier transform infrared spectroscopy (FT-IR) show that char and CaO reduce the function groups number of pyrolysis solid (PS), and it shows that the pyrolysis reaction is more complete. This research is expecting to provide theory support for catalytic pyrolysis of OS.
研究领域:
环境科学
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能源工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2021
·
IF 2.694
Qiaoyan Shang,Jifa Xiao,Yan Li,Wenge Liu,Xiaojuan Liu,Guanwei Cui,Xifeng Shi,Shuqian Xia,Bo Tang
Biomass pyrolysis oil is considered to be a promising alternative to fossil energy for the synthesis of high value-added chemicals and fuels. 2-Methoxy-4-methyl phenol (MMP), 4-ethylphenol (EP), 3,5-dimethylphenol (DMP), and m-Cresol (MC) are the important phenolic compounds in pyrolysis oil. The investigation of phase equilibrium is crucial to design separation processes. In this work, the isobaric vapor–liquid equilibrium (VLE) experiment, correlation, and estimation of binary systems (cyclohexane + MMP/EP/DMP/MC) were investigated. The experimental data were verified by the Herington test and van Ness test, and all were thermodynamically consistent entirely. The binary energy interaction parameters were obtained by correlating the experimental data using NRTL, Wilson, and UNIQUAC activity coefficient models. The average absolute relative deviations (ARD %) of T, x1, and y1 correlated by NRTL, Wilson, and UNIQUAC models for four binary systems are below 0.2. In addition, the VLE data were correlated and estimated by the UNIFAC-DMD model. The new interaction parameters of the C–CH2 group in the UNIFAC-DMD model were obtained and used to estimate cyclohexane + DMP systems. The ARD % of T and y1 for cyclohexane + DMP systems were 1.02 and 0.43, respectively. The estimation accuracy of UNIFAC-DMD with new parameters was significantly improved.
研究领域:
化学工程
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能源科学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2021
·
IF 3.178
Qiaoyan Shang,Jifa Xiao,Xiaojuan Liu,Yujie Ling,Wenge Liu,Guanwei Cui,Xifeng Shi,Shuqian Xia,Bo Tang
Biomass pyrolysis oil is a renewable resource and some of compounds (such as ketones, phenols and furans) in biomass pyrolysis oil are very useful compounds that can be used as raw materials for production of fine chemicals. Vapor-liquid equilibrium (VLE) data are critical and fundamental for designing distillation separation process. The VLE experiment and calculation of ketone-related binary systems (2-butanone + cyclopentanone, 2,3-butanedione + cyclopentanone) at atmospheric pressure are studied in this work. Binary interaction parameters of activity coefficient models (NRTL, Wilson and UNIQUAC) are obtained by correlating VLE experimental data. The new group CH 2 COCH 2 is defined and the new group interaction parameters are presented and used to predict VLE data by UNIFAC-DMD model. The distillation separation process of ketones is designed and simulated based on VLE results. This work will provide theoretical basis and technical guidance for industrial separation process of biomass pyrolysis oil.
研究领域:
化学工程
·
可再生能源
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Xiaohua Li,Zhufeng Liu,Shanshan Shao,Yongbo Yu,Weicheng Wang,Tianrui Sun,Shiliang Wu
Steam reforming of bio-oil is a promising technology for the industrial-scale conversion of biomass into hydrogen energy, in which the catalyst plays the crucial role. This study proposes a Ni-Ca-Al-Ce-O catalyst, prepared by CaO loading onto Ni/CeO 2 ·Al 2 O 3 , and tested in the two-stage adsorption-enhanced reforming of biomass pyrolysis oil for hydrogen production. The effects of carrier type and Ni loading on the physicochemical properties of the Ca modified Ni-based reforming catalyst and its reforming performance were investigated, and its reusability was tested finally. The results revealed that more Ni metal active sites are available on CeO 2 ·Al 2 O 3 compared to biochar as carrier. However, side reactions such as ketonization were significantly promoted due to the metal oxides in red mud (RM), resulting in a large amount of methane as a by-product over the Ni/RM catalyst. When Ca additive introduced on the well selected Ni/CeO 2 ·Al 2 O 3 , the selectivity of hydrogen in the reforming gas was enhanced. Meanwhile, more spinel NiAl 2 O 4 was formed due to the interaction between NiO and Al 2 O 3 , which enhanced the stability and activity of the Ni-Ca-Al-Ce-O catalyst. With a Ca/Al ratio of 1:1, Ni was more uniformly dispersed, and the yield and selectivity of hydrogen reached 73.35 % and 76.90 %. In the reusability tests, the yield of hydrogen remained above 60 % after six runs, which was superior to that of similar reforming catalysts, suggesting that the proposed Ni-Ca-Al-Ce-O catalyst is reliable in terms of reusability.
研究领域:
能源化学
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2021
·
IF 4.598
Wenjian Guo,Shuxin Bai,Yicong Ye
Although numerous efforts have been focused on the high-value-added reutilization of resin matrix in abandoned composites, the evidence chain of whether high-value-added resin pyrolysis oil can be reused has not been comprehensively presented. Herein, the epoxy resin (EP) matrix in composite wastes was pyrolyzed into EP pyrolytic oil (EPO), and its detailed composition and effects on the microstructure, strength, and ablation of remanufactured carbon fiber (CF) composites were analyzed and evaluated. According to the results, more than half (57.8 wt%) of the EP matrix was converted into EPO, which mainly included phenol and its derivatives. Given that EPO contains a certain amount of phenol derivatives, the viscosity and wettability of EPO-formaldehyde (EPOF) prepolymer with CF was slightly poorer than that of industrial grade phenol formaldehyde (PF). In addition, CF reinforced EPOF (CF/EPOF) composites with strengths and ablation rates comparable to those of CF/PF composites were fabricated successfully, owing to good process performance of the EPOF prepolymer. The present work provides a comprehensive feasibility data support and basis for high-value-added reutilization of an abandoned resin matrix composite for the manufacture of composites.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）