BIORESOURCE TECHNOLOGY
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2026
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IF 8.2
Xuan Tao,Hanlin Jin,Xuxun Wang,Xiaolei Shi,Shuai Gao,Lujiang Xu,Wei Chen,Zhen Fang
Correlation between biomass composition and catalytic phenolic content was built. • Lignin volatiles formed more phenolics via side-chain cleavage over N -doped biochar. • Phenolic proportion in holocellulose bio-oil nearly doubled under catalysis. • “Heterocyclic isomerization” pathway towards phenolics was newly proposed. • Phenolic formation mechanisms of different components were refined and calculated. Biomass catalytic pyrolysis is a promising approach for high‑value phenolic production. Herein, a N‑doped lignin‑derived biochar catalyst (LBC) was prepared via low‑temperature synchronous pyrolysis-activation-ammoniation using enzymatic hydrolysis lignin as feedstock. LBC featured a high specific surface area (826.115 m 2 /g, 85.35% micropores), abundant O‑C O /–OH group (34.5%), and dominant pyrrolic‑N (46.8%) for enhancing Lewis basicity. Ex‑situ catalytic pyrolysis of three major biomass components reduced bio‑oil yield but increased gas yield (CO yield from xylan increased from 168.71 to 221.69 ml/g, and H 2 yield was enhanced by 65.82%). Lignin pyrolysis achieved high phenolic content (60%), and LBC promoted side‑chain cleavage of intermediate to form simple phenolics. Phenolic content of holocellulose derived bio-oil doubled to nearly 10%, and phenolic selectivity in bamboo sawdust reached up to 54%, which positively correlated with lignin content. Multi‑component synergy further elevated phenolic content than theoretical levels. Transition of catalyst properties was mainly attributed to coke deposition from lignin volatiles and loss of active sites. DFT calculations detailedly evaluated the energetics and feasibility of competing pathways for lignin side‑chain cleavage reaction and demethoxylation into simple phenolics. For holocellulose, the calculations identified levoglucosan as the key phenolic precursor, which tended to form phenolics via a favorable low-energy-barrier “heterocyclic isomerization” pathway. This work revealed the synergistic mechanism between biomass components and catalyst property, providing guidance for high‑value phenolic production from biomass. Download: Download high-res image (119KB) Download: Download full-size image
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DOI
PubMed
高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2026
·
IF 6.5
Weixin Xu,Shuomei Wang,Songze Wang,Wenqi Sang,Chen Fan,Sicong Tian,Zongguo Wen,Lujia Han
Thermochemical conversion of lignocellulosic biomass into syngas contributes to renewable hydrogen and carbon utilization, advancing the development of carbon-neutral energy solutions. However, the current biomass gasification process suffers from high energy consumption due to the need for excessive steam input. In this study, a series of CeO 2 -supported Ni catalysts with tailored oxygen vacancy concentrations was prepared by doping Gd, Zr, and La as promoters into the support, aiming to enable the catalytic self-reforming of real biomass volatiles without exogenous steam. Comprehensive characterization techniques, including electron paramagnetic resonance (EPR), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS), revealed the critical role of surface oxygen vacancy concentration in determining the catalytic activity. The optimized 10Ni/CeLaO 2 catalyst achieved a total crude syngas yield of 15.4 mmol·g straw −1 at 700 °C, which is 70.4% higher than the non-catalytic system and 20.1% higher than undoped 10Ni/CeO 2 . Moreover, it also exhibits excellent stability with 87.3% oxygen vacancy retention and minimal carbon deposition (0.09 g g H2 −1 ) after reaction. This study provides key insights into the potential of employing oxygen vacancy engineering for efficient biomass thermochemical conversion without exogenous steam input.
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高影响因子
CHEMICAL PAPERS
·
2026
·
IF 2.7
Hu Zhijun,Zhang Juntao,Wei Benmei,Li Sheng,Long Yangke
Porous carbon derived from waste biomass exhibits significant potential for removing environmental contaminants due to its adsorptive properties. However, a structural trade-off exists between achieving the high porosity necessary for optimal adsorption capacity and the high energy consumption with equipment corrosion resulting from the pore-forming process. In this study, a novel strategy based on a free-radical-assisted hydrothermal process was presented for synthesizing porous biochar. Peroxymonosulfate (PMS) serves as the free radical source, enabling controlled oxidation of corn stalk pith during a straightforward hydrothermal pretreatment at 120 °C, followed by carbonization at 700 °C to form internal pores. This innovative approach enhanced the sulfamethoxazole (SMX) adsorption capacity by approximately threefold, from 43.37 mg/g to 130.22 mg/g. Although the PMS-pretreated porous biochar surface displayed superhydrophilic properties due to carboxyl group modification, results analyses indicate that SMX adsorption is primarily driven by π–π conjugation, hydrophobic interactions, and hydrogen bonding, relying on specific surface area rather than electrostatic interactions. This study presents a beneficial attempt at a free-radical-based pretreatment for the straightforward and robust synthesis of porous biochar. Graphical abstract The alternative text for this image may have been generated using AI.
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高影响因子
PROGRESS IN REACTION KINETICS AND MECHANISM
·
2026
·Vol. 51
·期 1
·
IF 13.8
Donghua Xu,Haoyu Xiao,Shengwei Feng,Yingquan Chen,Xianhua Wang,Hanping Chen,Haiping Yang
A limited understanding of the pyrolysis mechanisms hinders the efficient thermochemical conversion and recovery of nylon waste. This study investigates the pyrolysis behavior, volatile evolution, and backbone degradation mechanisms of nylon 6/6 by integrating thermogravimetry-Fourier transform infrared spectroscopy-gas chromatography/mass spectrometry (TG-FTIR-GC/MS) and density functional theory (DFT) calculations. According to TG analysis, nylon 6/6 undergoes pyrolysis mainly in the range of 390–515 °C, with a mass loss of 95.86 wt%, and exhibits the most intense degradation at approximately 480 °C. Kinetic analysis using the Coats-Redfern integral and Achar differential methods indicates that nylon 6/6 pyrolysis follows the first-order reaction model with an apparent activation energy of 278 kJ/mol. Online FTIR and offline GC/MS identify the characteristic gaseous products, including CO2, NH3, 1-amino-5-hexene (13.54%), and cyclopentanone (79.64%). Furthermore, DFT calculations elucidate the electrostatic potential (ESP) distribution, Fukui function indices, and bond dissociation energies (BDEs) of the nylon 6/6 model molecule. Results demonstrate that the nucleophilic attack of the terminal amino group and the free radical attack of H· facilitate the cleavage of the amide structure. The generated hexamethylenediamine and adipic acid segments subsequently undergo deamination and cyclization reactions to form 1-amino-5-hexene and cyclopentanone, respectively. By elucidating the backbone degradation mechanisms and product formation pathways during nylon 6/6 pyrolysis, the multi-scale study provides a theoretical basis for the recovery of high-value fuels and chemicals from nylon waste.
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DOI
高影响因子
POWDER TECHNOLOGY
·
2025
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IF 4.6
Junlei Wang,Shilong Li,Wen Du,Yunfei Xu,Jinyu Li,Kun Wang
The conventional co-precipitation wet chemical method for preparing LiNi x Co y Mn 1-x-y O 2 (NCM) cathode materials for lithium-ion batteries starts with the synthesis of Ni-Co-Mn hydroxide precursors, which are then calcined at high temperatures and thermally decomposed into oxides , followed solid-state reacting with lithium sources to obtain the NCM cathode materials. However, this hydroxide precursor route has several drawbacks, including multiple processing steps, pollution from strong bases, significant generation of liquid waste, and high energy consumption. In the current study, the Ni-Co-Mn oxide precursor route is explored via flame-assisted spray pyrolysis (FASP), which offers prompt reaction time, very few steps, and equipment without producing liquid wastes. Specifically, two types of oxide precursors, NiCoMnO 4 and Ni 0.8 Co 0.1 Mn 0.1 O 1.1 , were synthesized by FASP utilizing the co-flow diffusion flame burner system, which were subsequently mixed with cost-effective lithium carbonate (Li 2 CO 3 ) and subjected to calcination , resulting in the preparation of two types ternary NCM cathode materials, NCM111 and NCM811. Characterization results demonstrate that NiCoMnO 4 features a spherical mesoporous structure with a smooth surface, and a spinel-dominated composite oxide structure, whereas Ni 0.8 Co 0.1 Mn 0.1 O 1.1 exhibits a rough particle surface with a predominant rock salt phase NiO structure. Electrochemical test results show that NCM111 and NCM811 cathode materials exhibited excellent cycling stability, showing capacity retention of 88.5 % and 87.1 %, respectively, after 100 cycles, outperforming that of commercial counterparts and conventional synthesis approaches documented in literature. Thus, the Ni-Co-Mn oxide precursor route via FASP establishes a viable approach for preparing ternary NCM cathode materials
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121375
·
IF 7.2
Jinchuan Dai,Tingting Shen,Zhe Meng,Zuotai Zhang,Xiao-Ying Lu,Feiyun Sun,Yuanyuan Tang
As the production and consumption of electronic products increasingly rely on ternary lithium-ion batteries, the need for effective recycling and disposal methods for these batteries becomes crucial. This study introduces a novel, efficient co-pyrolysis method for recycling Li(Ni 1/3 Co 1/3 Mn 1/3 )O 2 (NCM) cathode materials from spent ternary lithium-ion batteries. Employing a 1.0:0.35 mass ratio of NCM: polyvinyl chloride (PVC) in an oxygen-free environment, high recovery rates of Li (91.3 %), Ni (93.5 %), Co (93.6 %), and Mn (94.5 %) metals are achieved. The NCM cathode materials begin to decompose at temperatures below 500℃ and are fully reduced and segregated into Ni-Co alloy, MnO, and Li 2 CO 3 at 550℃ in this process. Notably, the decomposition and reduction temperature of 550℃ is significantly lower than those reported in other studies. Moreover, the NCM cathode material, were regenerated from the pyrolysis products through a straightforward high-temperature solid-phase process, and the regenerated NCM demonstrates remarkable electrochemical properties with strong cycling and rate performance. This method significantly contributes to environmental conservation, offering a green solution for recycling ternary battery waste while also addressing the challenge of waste PVC plastics. This dual-faceted approach mitigates environmental burden and resource wastage, marking a stride towards sustainable waste management and circular economy.
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高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 11
·期 7
·5395-5402
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IF 1.5
Xin Zhao,Yun Deng,Jiang Cheng
High-quality SnO 2 :F films with an area of 15×15 cm 2 were prepared from stannic chloride (SnCl 4 ) solution via a house-made ultrasonic spray pyrolysis instrument. The focus of this investigation was on the volatilization of solution and doping process of fluorine, the main influencing factors on F doping content, and the effects of F doping content on the crystal structure, surface morphology, electrical, and optical properties. The results indicated that the crystallinity was enhanced with increasing doping concentration; the films exhibited (101) oriented growth and the resistivity decreased at first and then increased. During the preparation route, the droplet momentum and the temperature field above the hot plate demonstrate the most dominate influence on the film’s properties. The spray droplet gradually hydrolyzed during the moving process from sprinkler to substrate while the F doping content decreased with the increasing distance between the sprinkler and the substrate. By controlling the doping of F, high-quality and large area SnO 2 :F films with a resistivity of 1.2×10 -3 Ω⋅cm and a visible light transmittance of 82% were prepared, demonstrating a promising application for organic solar cells and low emissivity glass.
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高影响因子
ENERGY CONVERSION AND MANAGEMENT
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2022
·
IF 11.533
Liqiang Zhang,Jiaojiao Liu,Dawei Li,Zhengda Yang,Xinwei Wang,Riyi Lin
To explore an effective method of utilizing nitrogen-rich microalgae, the two-step pyrolysis (TSP) characteristic of Nannochloropsis sp (NCS) over ZSM-5 were studied by pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) and thermogravimetric analyzer (TG). The results showed that the TG process of NCS was classified into three stages. ZSM-5 increased the final weight loss and the pyrolysis temperature of NCS. The kinetic analysis was conducted by Flynn-Wall-Ozawa method, and showed that the pyrolysis of NCS conformed to one-dimensional shrinking core model. ZSM-5 did not affect the kinetic model, but decreased the activation energy. Compared with one-step pyrolysis, TSP improved the selectivity of N-heterocyclic compounds in the first step. Catalytic TSP further reduced the complexity of products significantly, and increased the selectivity of olefins in the first step, nitriles and aromatic hydrocarbons in the second step. The possible catalytic TSP reaction pathways of NCS were proposed.
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高影响因子
RSC Advances
·
2019
·Vol. 9
·期 72
·42316-42323
·
IF 3.049
Chong Wang,Changzhen Zhan,Xiaolong Ren,Ruitao Lv,Wanci Shen,Feiyu Kang,Zheng-Hong Huang
Lithium ion capacitors (LICs), bridging the advantages of batteries and electrochemical capacitors, are regarded as one of the most promising energy storage devices. Nevertheless, it is always limited by the anodes that accompany with low capacity and poor rate performance. Here, we develop a versatile and scalable method including ball-milling and pyrolysis to synthesize exfoliated MoS2 supported by N-doped carbon matrix derived from chitosan, which is encapsulated by pitch-derived carbon shells (MoS2/CP). Because the carbon matrix with high nitrogen content can improve the electron conductivity, the robust carbon shells can suppress the volume expansion during cycles, and the sufficient exfoliation of lamellar MoS2 can reduce the ions transfer paths, the MoS2/CP electrode delivers high specific capacity (530 mA h g−1 at 100 mA g−1), remarkable rate capability (230 mA h g−1 at 10 A g−1) and superior cycle performance (73% retention after 250 cycles). Thereby, the LICs, composed of MoS2/CP as the anode and commercial activated carbon (21 KS) as the cathode, exhibit high power density of 35.81 kW kg−1 at 19.86 W h kg−1 and high energy density of 87.74 W h kg−1 at 0.253 kW kg−1.
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高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Xiefei Zhu,Zejun Luo,Wenwen Guo,Wenfei Cai,Xinzhe Zhu
The biochar with porous structure and functionalized surface from biomass waste is strongly appealing as a CO 2 adsorbent due to its cost-effectiveness and eco-friendliness. In this study, N/S dual-doped porous biochar was fabricated from bio-oil refining residue through one-step carbonization-activation combined with in-situ doping. The CO 2 adsorption performance and mechanisms of biochar were investigated in pure CO 2 and simulated fuel gas based on its porous architecture and physicochemical properties. Specifically, the biochar derived from refining residue had abundant pores with a high proportion of micropores (above 87%). In addition, the biochar prepared at 800 °C exhibited relatively outstanding CO 2 adsorption performance (2.21 mmol/g) due to its ideal pore structure and more abundant surface functional groups (N and S). Although the increase in induced temperature promoted the pore development of biochar to obtain a higher specific surface area (957.44 m 2 /g), it had no significant positive effect on the subsequent CO 2 adsorption. Moreover, biochar demonstrated excellent recyclability through ten consecutive adsorption-desorption. The pathway advocated here for tailoring porous biochar from bio-oil refining residue will open up a new perspective in exploring the large-scale preparation of biochar from waste by-products of biomass pyrolysis-refining system for CO 2 capture.
研究领域:
环境科学
·
材料科学
·
碳捕集与封存
·
废物资源化
·
可持续能源
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高影响因子
FUEL
·
2026
·
IF 7.5
Haozhao He,Tao Wang,Qu Zhang,Bo Li,Xianze Wang,Wenyan Mu,Dongling Wu
The high content of heavy components in coal pyrolysis tar constrains its high-value utilization. Although semi-coke-based catalysts are cost-effective and promising for catalytic upgrading, their performance needs further enhancement. In this study, a novel nickel chloride-lactic acid (NiCl 2 -LA) deep eutectic solvent (DES) was designed. Leveraging nickel-lactic acid coordination and the inherent hydrogen bond network of DES, it penetrates semi-coke to promote nickel-semi-coke reactions, anchor nickel species with good dispersion, and finally synthesize nickel-supported semi-coke-based catalyst (Ni/C) via carbothermal reduction. Characterization results indicated that the Ni/C catalyst possesses a hierarchical pore architecture dominated by mesopores, with an increased specific surface area, enhanced degree of graphitization, and well-dispersed Ni nanoparticles on the semi-coke support. Based on this, during catalytic pyrolysis, the semi-coke support and well-dispersed Ni active sites exerted a synergistic effect, promoting the release of coal pyrolysis volatiles and increasing the tar yield from 8.30 % to 10.90 %. Simultaneously, by facilitating the cleavage of C–H and C–C bonds, they drove the conversion of heavy tar components to light components, elevating the relative content of monocyclic aromatic hydrocarbons from 1.16 % to 3.96 %. Moreover, the proportions of light components (BP ≤ 360 ℃) and light oil (BP ≤ 170 ℃) reached 62.60 % and 18.15 %, respectively, both at relatively high levels. This study validates that the functional properties of DES can be harnessed for the targeted design and preparation of high-activity catalysts, providing a viable strategy for the upgrading of light components in coal pyrolysis tar.
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高影响因子
FUEL PROCESSING TECHNOLOGY
·
2026
·
IF 7.7
Shangpeng Pan,Kaiwen Yun,Rui Shan,Shuxiao Wang,Taoli Huhe,Xiang Ling,Haoran Yuan,Yong Chen
For the high-value resource recovery of waste epoxy resin, this study prepared Nb and Ga modified ZSM-5 zeolite catalysts and systematically evaluated their performance in the catalytic pyrolysis of epoxy resin for aromatic hydrocarbon production. The results indicate that the bimetallic catalyst 8Nb4Ga (with 8% Nb and 4% Ga loading) exhibited the optimal catalytic activity, achieving the highest aromatic hydrocarbon yield of 68.6% under the conditions of 650 °C and a feedstock-to-catalyst mass ratio of 1:1. Characterization analyses confirmed that the metal species were well-dispersed on the ZSM-5 support without destroying the zeolite framework structure, though they induced changes in the pore structure. The introduction of Ga contributed to the formation of more mesoporous structures. Kinetic analysis revealed that the 8Nb4Ga catalyst significantly increased the apparent activation energy of the pyrolysis process, indicating that it guides the reactants through a higher-energy-barrier yet more selective pathway for aromatic hydrocarbon formation. This research provides theoretical support for the targeted catalytic conversion of waste epoxy resins into high-value aromatics.
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高影响因子
危险品化学品经营许可证（带存储）