FUEL
·
2025
·
IF 7.5
Wenlong Gao,Jinpeng Wei,Yuyu Wang,Yulong Ma,Fei Pan,Feng Lin,Wenxin Ji,Yuanyuan Li,Yonggang Sun
In response to the key challenges such as the complexity of deoxidation pathways and the low selectivity of aromatics commonly encountered in lignin catalytic conversion, this study proposes an innovative nickel-based spinel-modified multi-dimensional pore molecular sieve composite catalyst. By precisely regulating the cross-scale pore topology and enhancing the synergy between active components and the support, the catalyst integrates three functionalities-efficient deoxidation, directional aromatization, and coking inhibition. Experimental results demonstrate that NiAl 2 O 4 @MCM-41(7:1), which features a two-dimensional hexagonal straight pore structure, achieves a monocyclic aromatic hydrocarbons (MAHs) selectivity of 54.46%, attributed to its unique confined diffusion characteristics. This performance significantly surpasses that of NiAl 2 O 4 @SBA-15 with a two-dimensional through-pore structure and NiAl 2 O 4 @KIT-6 with a three-dimensional cubic pore structure. When the mass ratio of NiAl 2 O 4 to MCM-41 was optimized to 3:1 (NiAl 2 O 4 @MCM-41(3:1)), the spatial matching effect of the interfacial active sites was maximized, further increasing the selectivity of MAHs to 63.04%. In-situ infrared dynamic analysis reveals a spatiotemporal cascade catalytic mechanism: lignin macromolecules are first cleaved into oxygen-containing intermediates at the NiAl 2 O 4 sites outside the pores, followed by directional demethoxylation and dehydroxylation reactions within the confined pores of the molecular sieve. Besides, the stability of the catalyst was systematically evaluated. This process enables in-situ removal of coke precursors and efficient regulation of aromatic hydrocarbon formation pathways. This strategy offers a novel paradigm for the dynamic synergy of multiple active sites in biomass catalytic transformation.
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高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Kaixuan Wang,Liping Yang,Hexing Li,Fang Zhang
A unique strategy for the direct preparation of primary amine-functionalized ordered mesoporous phenolic resin (NH2-MPRN) was presented. The essence of our approach avoided the side reactions in the m-nitrophenol–formaldehyde resol synthesis using m-nitrophenol and formaldehyde as the monomers. Importantly, these resols can efficiently assemble with triblock copolymer F127 to form a mesostructured composite. The final prolysis treatment removed the F127 template to produce ordered mesopores, and meanwhile, the accompanying reductive gas in situ transferred the nitro groups to primary amines. Notably, the obtained NH2-MPRN material delivered fast toxic hexavalent chromium sorption kinetics with high uptake capacity and selectivity due to a mesoporous structure, high amine availability, and a hydrophobic surface. Interestingly, almost all of adsorbed chromium species existed as low-toxic trivalent chromium in the resin owing to the cooperative detoxification process by the neighboring primary amines and phenolic hydroxyl groups. Also, it showed the reversible detoxification for at least five times.
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2018
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IF 2.88
Huan Yang,Li He,Yuwei Long,Hongxi Li,Shuang Pan,Hui Liu,Xiaoli Hu
Herein, nitrogen, sulfur co-doped fluorescent carbon dots (N,SCDs) were synthesized by simple and facile microwave-assisted pyrolysis using ammonium citrate and cysteamine hydrochloride as precursors. The obtained N,SCDs exhibited outstanding photostability, excitation-wavelength independence, excellent fluorescence properties with fluorescence quantum yield (FLQY) up to 54.8%. Significantly, the fluorescence of N,SCDs was effectively quenched by Cr(VI) based on inner filter effect (IFE). Subsequently, the fluorescence of the N,SCDs-Cr(VI) system successfully recovered with addition of ascorbic acid (AA) owing to redox reaction between Cr(VI) and AA. Therefore, N,SCDs could be employed as an efficient fluorescent “turn-off” probe for highly sensitive detection of Cr(VI), with a liner detection range from 0.35 to 126.0 μmol L −1 and a detection limit of 0.11 μmol L −1 . Meanwhile, the N,SCDs-Cr(VI) system could be used as an fluorescent “turn-on” sensor for detection of AA with a detection limit of 0.17 μmol L −1 and a liner detection range of 0.57–264.0 μmol L −1 . Interestingly, a molecular logic gate was constructed based on the fluorescence recover of the N,SCDs-Cr(VI) system in the presence of AA. Most importantly, this fluorescent probe has been applied for determination of Cr(VI) and AA in environmental and biological fields with satisfactory results.
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高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2026
·
IF 6.7
Yuhang Li,Haifeng Jiang,Jiahao Qi,Junyu Chen,Wenpeng Hong
This study investigated the catalytic pyrolysis of pine sawdust over transition-metal-modified g-C 3 N 4 catalysts (Ni/g-C 3 N 4 , Zn/g-C 3 N 4 , and Co/g-C 3 N 4 ) to enhance phenolic selectivity and elucidate metal–support synergistic effects. Among these catalysts, Co/g-C 3 N 4 exhibited the best performance in enhancing the relative content of phenolic compounds. Compared with non-catalytic pyrolysis at 550 ℃, the phenolic content increased by 24.66%. In addition, the results indicated that a CO 2 atmosphere negatively affected phenolic formation. The temperature-programmed TG-FTIR and evolved-gas analyses revealed that the presence of the Co/g-C 3 N 4 catalyst could promote the formation of CO and limit the generation of CH 4 and C 2 -C 3 hydrocarbons during the catalytic pyrolysis process. The related mechanism analysis showed that the interaction between Co 2 + /Co 3+ species on g-C 3 N 4 and Lewis-basic N sites enabled an interfacial synergistic effect for the selective formation of catechol and methyl-catechol. Furthermore, the exploratory multi-output regression analysis further verified that catalyst type primarily governed phenolic enrichment, whereas temperature mainly influenced syngas formation. Overall, this study provides a deeper understanding of the reaction pathways for the selective generation of phenolic compounds in biomass catalytic pyrolysis, and offers a practical approach for the integration of experimental analysis and data-driven methods.
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高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2026
·
IF 6.7
Xuepeng Wang,Zengtong Deng,Wei Deng,Yimin Xiong,Jun Xu,Long Jiang,Yi Wang,Sheng Su,Song Hu,Jun Xiang
Bio-oil holds great promise as a renewable alternative to fossil fuels via upgrading. Its catalytic pyrolysis upgrading is often limited by severe coking, which hinders further technological advancement. Component interaction plays an important role in coke formation during bio-oil pyrolysis. However, the influence remains unclear when the catalyst is introduced. Therefore, this study aims to elucidate the interactions among components during catalytic bio-oil pyrolysis and to investigate their effects on aromatic evolution and coking behavior. Results indicate that increasing temperature from 600 °C to 800 °C inhibits coke formation during bio-oil pyrolysis, decreasing coke yield (based on heavy components basis) from 31.2 % to 20.1 %. Interactions among bio-oil components can facilitate the cracking of heavy tar into small-molecule aromatics, thereby suppressing the formation of large aromatic systems, decreasing coke yields (based on heavy components) from 27.5 % to 23.1 % at 600 °C. In contrast, the introduction of a catalyst promotes the transformation of monocyclic aromatics into bicyclic ones, but inhibits their further condensation into coke, further decreasing coke yields (based on heavy components) from 18.5 % to 16.8 % at 800 °C. This work provides valuable insights into understanding the coking mechanism during catalytic pyrolysis of bio-oil and offers guidance for catalyst design.
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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
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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ENERGY CONVERSION AND MANAGEMENT
·
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
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
BIORESOURCE TECHNOLOGY
·
2026
·
IF 9
Fei Wu,Kai Sun,Wenjian Liu,Shu Zhang,Xun Hu
Pre-carbonization plus activation is commonly used for activation of biomass. Nonetheless, pre-carbonization via pyrolysis removes a significant portion of aliphatic structures, diminishing mass yield of resulting activated carbon (AC) from activation. In this study, pyrolysis-condensation (pyro-condensation) was proposed as a method for pre-carbonization prior to activation of peach, cellulose, and lignin with K 2 C 2 O 4 , which could achieve recycled polymerization of volatiles to maximize mass yield of biochar and correspondingly AC. The results confirmed double or even triple of biochar yields with peach or cellulose via pyro-condensation, attributed to volatile recycling and carbon retention via aliphatic polymerization. The mass yields of AC from subsequent activation were also tripled with cellulose and doubled with lignin when compared with the pyrolysis-activation route. Moreover, pyro-condensation plus activation enhanced specific surface area of AC (i.e. 1243.6 versus 1048.1 m 2 g −1 from pyrolysis-activation route with peach), abundance of mesoporous structures (12.8% versus 3.2% with cellulose) and enlarged pore size (1.9 versus 1.6 nm with cellulose). The in-situ IR characterization confirmed abundant aliphatic structures in form of −C- H, –OH, C O and C-O- C in the biochar from pyro-condensation, which were formed from re-polymerization of volatiles and filled voids of biochar, rendering smooth surface. The AC from pyro-condensation pretreatment exhibited superior phenol adsorption performance (maximum capacity: 426.3 mg/g, 49.5% higher than the counterpart with pyrolysis pretreatment) and excellent reusability. The abundant aliphatic components induced more intense cracking in the followed activation, forming AC of more developed pores, higher thermal stability, higher degree of aromatization and lower overall impacts on environment.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Xiangyi Zhang,Zhili Guo,Weina Jia,Guobo Chen,Weijun Mo,Xuefeng Yan,Liangmin Yu
Carbon materials offer advantages such as low density and high conductivity but suffer from poor impedance matching. Although constructing hollow porous structures can address this issue, conventional templating and template-free strategies often lead to severe agglomeration and structural collapse during high-temperature processing. To overcome these limitations, this study successfully prepared N-doped hollow porous carbon flowers (N-HPCF) with a tunable cavity size using a confined-space pyrolysis strategy. By carbonizing PAD@PDVB precursors with different divinylbenzene (DVB) coating amounts, a series of N-HPCF with various cavity size were obtained. The optimized N-HPCF2 (PAD:DVB = 24:18) exhibits a specific surface area of 85.71 m²·g −1 , and a pore volume of 0.5676 cm³ ·g −1 . It achieves excellent EMWA performance with a minimum reflection loss (RL min ) of −56.79 dB, an effective absorption bandwidth (EAB) of 5.02 GHz at 2.0 mm, and a radar cross-section reduction of 28.8 dB·m 2 . The enhanced performance is attributed to the synergistic effect of the N-doped, flower-like morphology and hollow porous structure, which optimize impedance matching and provide multiple loss mechanisms. Furthermore, a metamaterial design (N-HPCF1–2-3) achieved an EAB of up to 12 GHz (6–18 GHz) in reflectivity simulations, demonstrating that rational structural design effectively enhances EMW absorption performance.
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高影响因子
危险品化学品经营许可证（带存储）