JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Yulai Zhao,Haoran Chen,Longqiang Xiao,Xiangyu Yin,Linxi Hou
The urgent demand for high-performance energy storage components has been driving the exploration for superior battery-type electrode materials for hybrid supercapacitors , which is challenging but of considerable significance. In this paper, a one-step pyrolysis route was elaborated to prepare oxygen-enriched hierarchical porous carbon supported Co-Ni nanoparticles Co-Ni/OHPCs) by facile self-crosslinking assisted high internal phase emulsion (HIPE) templating. The oxygen-enriched porous carbon framework provides large specific surface area and structural stability, meanwhile Co doping can significantly reinforce the electrochemical performance of the Co-Ni/OHPCs battery-type electrodes. By optimizing the ratio of Ni 2+ to Co 2+ ions, the obtained Co-Ni/OHPC electrodes exhibited excellent electrochemical performance of 817.3 F g −1 at a scan rate of 5 mV s −1 . Furthermore, coupling with an activated porous carbon anode, the assembled hybrid supercapacitor (HSC) possessed an appreciable energy density of 66.94 Wh kg −1 at 409.9 W kg −1 and a capacitance retention ratio of 73.89% after 5000 cycles, showing considerable application prospects. This structural design strategy provides new inspiration for the reasonable optimization of new electrode materials for promising hybrid supercapacitors.
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高影响因子
Journal of Water Process Engineering
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2023
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IF 7
Qiang Qu,Ling Qiu,Ming-Zhuo Li,Guo-Tao Sun,He-Yu Chen,Xiao-Hui Guo
Magnetic biochar was successfully prepared from the waste Zanthoxylum branch and applied for Cr (VI) removal from wastewater. Modification parameters including concentration of iron-containing solution, ratio of Fe (III)/Fe (II), and pyrolysis temperatures were systematically investigated. There was a synergistic effect of synthesis conditions on the porous structure and the form distribution of iron. Based on the adsorption experiments, 900MZB8–1 displayed the best Cr (VI) removal performance (42.68 mg/g). The fitting result confirmed that the Cr (VI) removal reaction was the homogeneous chemisorption , and the predicted maximum removal capacity could reach at 215.44 mg/g. Moreover, the XPS analysis indicated that 79 % of Cr (VI) on adsorbent surface was transformed to Cr (III) by the cooperation of oxygen-containing functional groups and reductive iron. Meanwhile, 900MZB8–1 maintained the eminent removal efficiency of 80.65 % after four regeneration cycles. Additionally, the economic feasibility and practical performance indicated the rich-potential adsorbent for Cr (VI) removal.
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高影响因子
FUEL
·
2025
·
IF 7.5
Yongyuan Deng,Yichao Ye,Tao Yin,Jinyao Mai,Zhipeng Tian,Chao Wang,Ying Chen,Zhi Yang,Junling Tu,Riyang Shu
Hydrodeoxygenation (HDO) technology is an essential method for efficiently converting phenolic compounds from biomass into high-quality liquid fuels. Rationally designed catalysts not only significantly enhance stability and reaction rates, but also improve product selectivity and fuel quality. In this study, we proposed a Zr 3+ -defect-rich core–shell structured catalyst Ru@SiO 2 -ZrO 2 and employed it for the HDO of phenolic compounds and lignin pyrolysis oil. Ru nanoparticles are uniformly dispersed and have small particle sizes, showing outstanding catalytic hydrogenation activity. The porous SiO 2 shell possesses a high specific surface area with a high thermal stability, facilitating reactant transport and maintaining catalyst structural integrity. ZrO 2 serves as an acid modifier to enhance the catalyst acidity and promote the deoxygenation procedure. Besides, ZrO 2 enhances the adsorption of phenolic compounds and improves the cleavage of C-O bonds, due to its abundant oxygen vacancies . These factors make the catalyst achieved complete conversion of guaiacol to cyclohexane at mild reaction temperature of 240°C, which is superior to other similar reported results. Compared to conventional supported Ru/SiO 2 -ZrO 2 catalysts, the unique core–shell structure of Ru@SiO 2 -ZrO 2 obtained a sustained catalytic activity after five consecutive recycles without significant deactivation. Moreover, this core–shell catalyst exhibited good HDO performance for various phenolic compounds and lignin pyrolysis oil. The hydrocarbon content increased significantly from 12.7 % to 96.9 % in the upgrading of lignin pyrolysis oil, demonstrating the catalyst’s great potential for future industrial applications.
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高影响因子
FUEL
·
2022
·
IF 8.035
Junhao Lin,Jiaman Sun,Yi Chen,Juan Luo,Chongwei Cui,Shichang Sun
To directionally convert sludge into the high-quality syngas, the effects of various parameters on the biogas produced by the sludge microwave pyrolysis are explored, and the syngas generation mechanism under the synergistic effect of parameters is revealed. The results showed that the pyrolysis final temperature, reaction time, and the amount of the microwave absorber were the key factors that affected the biogas yield. A response surface analysis was used to explore the synergistic effect of each key parameter on the yield and the lower heating vale (LHV) of syngas. The pyrolysis temperature was the key to driving syngas generation. Properly prolonging the reaction time decreased the formation of tar by-products and increased the syngas yield. The addition of a microwave absorber increased the heating rate by enhancing the conversion efficiency of microwave energy, and this contributed to accelerating the dehydrogenation and the Boudouard reactions to promote the generation of H 2 and CO. Under high temperature conditions (900 °C), a higher syngas yield (10.25–34.31 mol/kg DS ) and LHV (4.85–14.53 MJ/kg DS ) were obtained in a shorter period time by synergistically optimizing the amount of microwave absorbers (8–10 g) and the reaction time (28–40 min). As the pyrolysis temperature increased, the H 2 content gradually rose to the peak, while the content of CO continued to increase. By analyzing the evolution of the specific pyrolysis products, the secondary pyrolysis of bio-oil at high temperatures and the Boudouard reaction were found to be the primary pathways that promoted syngas generation. This research provides strategic guidance for producing high-quality syngas using the microwave pyrolysis of waste biomass, thereby minimizing the exploration cost of basic experiments and providing directional control of the syngas quality.
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高影响因子
JOURNAL OF CHROMATOGRAPHY A
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2025
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IF 4
Tiefeng Xu,Xiangjie Meng,Gangqiang Wang,Wangyang Lu
The identification of cellulose fibers from different sources remains a significant challenge across various fields due to their complex structural composition and diverse applications. In this study, pyrolysis gas chromatography/high-resolution mass spectrometry (Py-GC/HRMS) was employed to identify cellulose fibers and fabrics utilizing a relative ratio approach based on pyrolyzate yield, with levoglucosan (LG) as the primary peak, furfural (FF) and 5-methyl-2(3H)-furanone (α-AL) as reference peaks. Initially, four cellulose fibers had large discrepancies in pyrolyzate yield relative ratios when pyrolyzed at 600°C. The FF to LG ratios were 0.58-0.83 for cotton, 0.25-0.35 for flax, 0.14-0.18 for viscose, and 0.05-0.07 for tencel, while the α-AL to LG ratios were 0.64-0.88 for cotton, 0.29-0.38 for flax, 0.18-0.22 for viscose, and 0.03-0.05 for tencel. The relative proportion of fabrics has significantly decreased compared to fibers, which indicated that the manufacturing process affected the fiber components. It confirmed that alkaline bleaching can effectively eliminate fiber impurities and enhance cellulose content, which contribute to the increase of LG yield and the decrease of relative ratio. This work marks the inaugural differentiation of four cellulose fibers and fabrics using Py-GC/HRMS, offering a valuable methodology and pivotal reference data for future investigations in the field.
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PubMed
高影响因子
Foods
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2026
·Vol. 15
·期 6
·1098
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IF 6
Gang Li,Xingyang Lai,Jue Gong,Tong Zhang,Ke Xu,Zhengyang Feng,Xiaolong Yao
To address the mounting environmental burden caused by solid waste from the food supply chain—specifically agricultural residues and plastic packaging—this study systematically investigated the synergistic mechanisms and product regulation pathways in the co-pyrolysis of four representative food processing by-products—rice husk, pine wood, corn stover, and chestnut shell—with polypropylene, a common food packaging material. A comprehensive methodology integrating thermogravimetric analysis, kinetic modeling, and product characterization was employed. The results demonstrate that incorporating polypropylene into co-pyrolysis systems, such as those involving waste oil, significantly reduces the average activation energy, indicating a catalytic effect that enhances reaction kinetics. Notably, the co-catalytic interaction between corn stover and PP led to a substantial 54.90% reduction in oxygen content, underscoring PP’s role as an effective hydrogen donor that promotes deoxygenation and free radical reactions, thereby increasing hydrocarbon production. At an optimal pyrolysis temperature of 600 °C, product distribution was effectively regulated: the hydrocarbon yield in the CP (corn stover/PP) system increased from 39.8% to a maximum of 65.6%, reflecting a targeted conversion of oxygenated compounds into high-value hydrocarbons. Furthermore, greenhouse gas (GHG) emission calculation and techno-economic analyses indicate that a natural gas-assisted co-pyrolysis process (Scenario C) can generate a net daily profit of 1835 RMB while reducing annual CO2emissions by 6515 tons, demonstrating both economic feasibility and environmental benefits. This study provides a theoretical foundation for the circular economy in the food industry, offering a viable technical pathway for the simultaneous treatment of organic food waste and packaging plastics, thereby supporting the sustainable development of the agri-food sector.
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PubMed
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
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2026
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IF 5.4
Jiamei Lai,Zhengyu Yu,Hui Ke,Yilong Li,Xuanhui Xu,Ziyi Zeng
CFRP waste is growing at an increasing rate. This study proposes a novel atmospheric-pressure phosphoric acid pyrolysis method to efficiently recover high-value carbon fibers from waste CFRP, which are then applied to enhance the flame retardancy of VER. Waste CFRP was immersed in phosphoric acid at 80 °C under atmospheric pressure. The acid acted as a solvent to degrade the epoxy resin, achieving an 80% degradation rate. Comprehensive characterization (SEM, XPS, TGA, XRD, Raman) confirmed that the recycled carbon fibers (rCFs) possess a clean surface with their microstructure largely intact. Mechanical testing revealed excellent property retention, with a tensile strength of ∼97% and interfacial shear strength comparable to virgin fibers. This method is advantageous due to its lower temperature, reduced energy consumption, and operational simplicity compared to traditional recycling techniques. Halloysite nanotubes (HNTs) were employed to modify both recycled carbon fibers (rCFs) and virgin carbon fibers (vCFs), followed by the fabrication of HNTs/CF/VER composites. SEM confirmed that carbon fibers were successfully modified, and the modification effect of rCFs was superior to that of vCFs. Tests demonstrated that rCFs and HNTs exhibit a favorable synergistic flame retardant effect, modified recycled carbon fibers (m-rCFs) at 1 wt% exhibited relatively excellent flame-retardant performance (LOI: 28.3%, UL-94: V-1 rating, Lowest pHRR and THR), superior to modified virgin carbon fibers (m-vCFs) at the same addition level and a slight improvement in tensile strength relative to pure VER. The above research provides a promising solution for the degradation and reuse of waste CFRP.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9.1
Jingfan Yan,Fumin Chu,Yanpeng Huang,Ziyan Nong,Tong Cui,Guoting Zeng,Sen Yang
Carbon membranes with gradual-transition wettability gradient were prepared from wood. • FeCl 3 as catalyst and hydrophilic modifier in the impregnation-pyrolysis method. • HGWCM with wettability gradual-transition from superhydrophilic to superhydrophobic. • HGWCM is an excellent support membrane for membrane extraction. • High average mass flux for 2,4-DCP and 260 h stability in membrane extraction. Gradient wettability materials show great potential for controlling fluid behavior. However, their fabrication methods are generally intricate, requiring expensive feedstocks. Achieving compatibility between hydrophilic and hydrophobic regions is also a critical challenge. Here, we report a method to prepare wood-based carbon membrane (GWCM) with gradual-transition gradient wettability by creating carbonization gradient and constructing Fe 3 O 4 hierarchical micro/nanostructures on the GWCM surface. In this method, FeCl 3 adsorbed onto the wood blocks is the decisive factor in creating gradient wettability, functioning as both a catalyst for wood carbonization and a hydrophilic modifier. Cutting GWCM1 yields two 0.5 cm-thick membranes, designated HGWCM, which exhibit a gradual-transition wettability gradient ranging from superhydrophilic to superhydrophobic. The obtained HGWCM demonstrates outstanding performance as a support membrane in membrane extraction. Even at a thickness of up to 0.5 cm, HGWCM containing 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF 6 ]) achieved an average mass flux of up to 3610 mg m −2 h −1 for 2,4-dichlorophenol (2,4-DCP), and the removal efficiency of 2,4-DCP remained unchanged after 260 h of continuous extraction. The oil-water separation performance of the HGWCM was also demonstrated. This work offers a facile, scalable and general method for preparing gradient-wetted materials and explores their application in membrane extraction. Download: Download high-res image (314KB) Download: Download full-size image
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2026
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IF 6.9
Xilin Wang,Boxiang Zhang,Longfei Xia,Ping Dai,Yuqing Zhao,Liang Zhou,Dongyan Xu
Background Red mud is the world’s most extensively generated waste in the non-ferrous metal industry, posing significant environmental risks due to its strong alkalinity and lack of effective disposal methods. It is urgent to find a reasonable and effective strategy to transform red mud into a Heterogeneous catalyst for environmental remediation. Methods α-MnO 2 nanorods were anchored on biochar-modified red mud composite (RMBC) via the hydrothermal method and utilized as a catalyst to activate PMS for the degradation of Rhodamine B (RhB). Reactive oxygen species generated during the catalytic process was identified through EPR, XPS, and Raman spectroscopy measurements. Degradation intermediates of RhB were identified using LC-MS. Furthermore, the ecotoxicity of RhB and its transformation products was evaluated using the ecological structure-activity relationship (ECOSAR) prediction model. Significant findings The as-prepared α-MnO 2 /RMBC achieves a remarkable RhB degradation efficiency of 98.6 % within 30 min, significantly outperforming control samples including α-MnO 2 /RM, α-MnO 2 /BC, and the mixture of α-MnO 2 /RM and α-MnO 2 /BC, suggesting a pronounced synergistic interaction between α-MnO 2 and RMBC. Mechanistic analysis reveals that RhB degradation is predominantly governed by an activated surface-PMS inner-sphere complex, signified as Mn III (s) -(O)OSO– 3. Furthermore, the Fe II species inherent to RM facilitates the redox-mediated reduction of Mn IV to Mn III , thereby sustaining the catalytic activity of active Mn III sites and enabling robust recyclability and reusability of the α-MnO 2 /RMBC catalyst.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 4
·123366
·
IF 7.5
Xiong Zhang,Zihan Liu,Junjie Zhang,Jinyang Gu,Zhiguo Dong,Jingai Shao,Haiping Yang
Developing low-cost and high-performance adsorbents is crucial for reducing CO 2 and pollutants in coal-fired flue gas. Herein, a new waste paper-based carbon aerogel is synthesized for the combined adsorption of CO 2 and SO 2 in coal-fired flue gas. The evolution of physicochemical properties of waste paper-based carbon aerogels at different pyrolysis temperatures, and their adsorption performances in fixed beds were investigated. The results show that with the increase of pyrolysis temperature, the surface N-containing groups and narrow micropores of carbon aerogels first increase and then decrease. Although the paper-based carbon aerogel pyrolyzed at 600 °C (PCA-600) does not have the highest BET surface area (530 m 2 /g), it exhibits the highest microporosity (86.75%) and a rich abundance of narrow micropores, as well as the highest surface nitrogen content (4.2%) and pyrrolic nitrogen fraction (37%). These characteristics enable it to achieve the highest CO 2 and SO 2 adsorption capacities in the fixed bed, reaching 66.0 mg/g and 116.4 mg/g, respectively under 298 K and 1 bar. During combined adsorption, CO 2 and SO 2 show obvious competitive adsorption on carbon aerogels, leading to 13–23% decreases in adsorption capacities. Among them, surface N-containing groups have a stronger impact on the competitive adsorption of SO 2 , which is confirmed by DFT calculation results. This work provides new insights for solid waste resource utilization and the design of CO 2 adsorbents.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Xu-Zhen Zhu,Guang-Jian He,Meng-Meng Wang,Fu-Lu Chang,Zi-Yang Hua,Hao-Bo Wang,Xuan-Qi Wu,Lun Chen
Laser pyrolysis directly depolymerizes PMMA without solvents or catalysts. • Optimized laser pyrolysis yields a liquid product containing 96.9% MMA. • Laser-specific energy consumption is only 0.0103 kWh/g of liquid product at 40 W. • Recovered MMA repolymerizes to R-PMMA with comparable optical transparency and mechanical performance. • Varied PMMA-based feedstocks afford MMA-rich products by laser pyrolysis. The widespread use of poly(methyl methacrylate) (PMMA) has generated substantial plastic waste, yet its practical recycling efficiency remains critically low. Herein, we report a laser pyrolysis strategy for the highly efficient depolymerization of PMMA back to its monomer methyl methacrylate (MMA). Employing a 915 nm infrared laser as a photothermal source and a small amount of carbon black (<1 wt%) as a photothermal agent, the depolymerization of PMMA proceeds in the absence of pre-modification, solvent, or catalyst, yielding MMA monomer with high recovery. Under optimized parameters (30 W laser power, 0.2 wt% carbon black loading), an MMA recovery of 91.0% was achieved, with the product composition confirmed by FTIR, NMR, and GC–MS. When the laser power was elevated to 40 W, the productivity reached 23.6 g/h (extrapolated from a ∼ 5 min single-batch experiment), accompanied by a laser-specific energy consumption of 0.0103 kWh/g. The recovered MMA was further repolymerized successfully via emulsion polymerization, and the regenerated R-PMMA exhibited comparable chemical structure, molecular weight, optical transparency and mechanical properties relative to pristine virgin PMMA. The applicability of this strategy was further demonstrated across a range of PMMA-based samples, including industrial waste, Fe 2 O 3 -containing PMMA, and PE-containing blends, with MMA recoveries ranging from 71.3% to 90.3%. This work establishes a high-efficiency, solvent- and catalyst-free depolymerization route with promising potential for PMMA monomer recovery and subsequent material regeneration. Download: Download high-res image (372KB) Download: Download full-size image
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高影响因子
Energy Sources Part A-Recovery Utilization and Environmental Effects
·
2022
·
IF 2.902
Xianglu Kong,Song Yang,Kaixia Zhang,Qi Wang,Jiangpeng Li,Tingting Jiao,Ju Shangguan,Shoujun Liu
Civil dispersed coal combustion has become an important source of Nitrogen oxides (NOx), which has caused serious pollution to the ecological environment. In order to control NOx emission in the combustion process of civil coal, coal-based solid clean fuel should be used instead of dispersed combustion of coal, so as to achieve the purpose of reducing NOx emission. The pyrolysis and combustion tests of different iron additives loaded coals were performed. The raw and pyrolytic chars were prepared and characterized by X-ray photoelectron spectroscopy (XPS), nitrogen adsorption, scanning electron microscope (SEM) and X-ray diffraction (XRD). The results indicate that iron additives introduced into raw coal in one step have coupling effect on NOx emission control during pyrolysis and combustion. The addition of iron can lead to more Fe2O3, Fe3O4 and α-Fe in coke and promote coke cracking. Supporting iron catalysts could make coke structure more porous, which increases the contact area of gas. These all make the conversion of N2 increase from 16.71% to 29.64% during pyrolysis. The existence of iron catalyst can also promote the proportion of pyridinic N (N-6) and quaternary nitrogen (N-Q) relatively increase. At the same time, the existence of iron catalyst is beneficial to catalytic reduction of NOx by C and CO. The emissions of NOx during combustion can be reduced by 34.01%. The iron catalyst introduced in one step has a coupling effect on NOx control in coal pyrolysis-combustion process, which realizes a two-step nitrogen reduction effect in combustion. It provides theoretical basis for ultra-low NOx emission in clean fuel combustion.
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高影响因子
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