JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2017
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IF 3.471
Leilei Dai,Liangliang Fan,Dengle Duan,Roger Ruan,Yunpu Wang,Yuhuan Liu,Yue Zhou,Zhenting Yu,Yuezhen Liu,Lin Jiang
Fast microwave-assisted catalytic pyrolysis (fMACP) of soapstock for hydrocarbon-rich bio-oil using different catalysts was investigated in this study. Effects of catalyst, pyrolysis temperature and catalyst to feed ratio on product fractional yields and chemical composition were studied. Experimental results indicated that the use of catalyst increased the relative content of hydrocarbons and selectivity of aromatics. Moreover, HZSM-5 catalyst enhanced the bio-oil yield. When HZSM-5 zeolite was used as a catalyst, 600 °C was the optimal pyrolysis temperature, which provides the maximum bio-oil yield and high content of hydrocarbons. At the cost of the decrease of bio-oil yield, the increase of catalyst to feed ratio increased the relative content of hydrocarbons from 65.41% to 88.59% and selectivity of aromatics from 5.99% to 29.46%. In addition, the analytical results of bio-char show that bio-char with micropore structure and high contents of the essential plant nutrients and micronutrients can be used as a soil amendment to improve soil productivity.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jiang Liu,Bingxue Chen,Yukun Huang,Yijun Cao,Jingbo Chen,Liqiang Wang,Yan Liu,Yangyang Fan
Indium, a strategic key metal, is mainly recovered from zinc leaching residue. However, a challenging problem in the treatment of zinc leaching residue is how to efficiently and cleanly treat the poorly soluble phase, the indium-bearing zinc ferrite (IBZF). Here, we propose a novel strategy for the selective extraction of indium , zinc and iron from IBZF. By introducing water to regulate the coordination environment of a choline chloride-anhydrous oxalic acid based deep eutectic solvent (ChCl-Oxa based DES), efficient leaching and deep separation of indium , zinc and iron were achieved. Water, acting as both co-solvent and diluent, played a critical role in the whole process. The addition of a little water reduces the viscosity of the DES, thereby improving the leaching of indium , zinc and iron. Under specific leaching conditions (leaching temperature of 90 °C, liquid/solid ratio of 20:1 ml/g, molar ratio of ChCl:Oxa = 1:1, molar ratio of DES:H 2 O = 1:3 and reaction time of 3.5 h), the leaching efficiencies of indium, zinc and iron were 96.27 %, 95.55 % and 96.33 %, respectively. The subsequent addition of large amounts of water dilutes and dissociates the structure of the DES, facilitating the stepwise precipitation and deep separation of metal ions. The precipitation efficiency of zinc and iron reached 93.06 % and 98.07 %, respectively. Residual indium ions in the solution were effectively adsorbed by activated carbon, with a recovery efficiency of 75.7 % after five cycles of adsorption. The solution separated from the metal ions was well regenerated by evaporation and addition of Oxa. Our work represents a novel approach for the recycling and clean utilization of zinc leaching residue. And the regulation of the coordination environment of metal ions in DES is proved to have great potential in metal recycling.
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POLYMERS FOR ADVANCED TECHNOLOGIES
·
2025
·Vol. 36
·期 1
·e70063
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IF 3.4
Yawen Li,Guoyang Ma,Shaohong Xu,Zaheer Ahmad,Muhammad Ali,Saad Ahmed,Naveed Ahmed
In the present study, hexagonal boron nitride (h-BN) nanosheets were first functionalized with hydroxyl groups (h-BN-OH), and then phosphonic acid groups were grafted onto the h-BN surface (BNP) using aminotris(methylenephosphonic acid) (ATMP) through a condensation reaction. The BNP was then incorporated into a polyvinyl chloride (PVC) matrix to prepare PVC/BNP composites. Thermogravimetric analysis showed an increase in thermal stability, with BNP/PVC composites exhibiting greater resistance to degradation at elevated temperatures. The addition of BNP improved the dispersion and interfacial adhesion within the PVC matrix, as confirmed by Scanning Electron Microscopy (SEM). Furthermore, the PVC/BNP composites exhibited a 22.5% increase in tensile strength (21.2 MPa) and an 82% improvement in elongation at break (464%) compared to pristine PVC composites, which showed a tensile strength of 17.3 MPa and an elongation at break of 255%. Moreover, the addition of BNP notably improved the thermal conductivity from 0.18 to 1.50 W/m K as the BNP content increased from BNP-0 to BNP-4. These improvements in thermal stability and mechanical strength, as well as excellent migration resistance, make BNP/PVC composites highly promising for advanced applications.
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BIOTECHNOLOGY AND BIOENGINEERING
·
2024
·Vol. 121
·期 7
·2106-2120
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IF 3.5
Siqi Wang,Yujie Liu,Hongfu Guo,Yan Meng,Weini Xiong,Ruihua Liu,Chao Yang
Microbial production of polyhydroxyalkanoate (PHA) is greatly restricted by high production cost arising from high-temperature sterilization and expensive carbon sources. In this study, a low-cost PHA production platform was established from Halomonas cupida J9. First, a marker-less genome-editing system was developed in H. cupida J9. Subsequently, H. cupida J9 was engineered to efficiently utilize xylose for PHA biosynthesis by introducing a new xylose metabolism module and blocking xylonate production. The engineered strain J9UΔ xylD -P8 xylA has the highest PHA yield (2.81 g/L) obtained by Halomonas with xylose as the sole carbon source so far. This is the first report on the production of short- and medium-chain-length (SCL- co -MCL) PHA from xylose by Halomonas . Interestingly, J9UΔ xylD -P8 xylA was capable of efficiently utilizing glucose and xylose as co-carbon sources for PHA production. Furthermore, fed-batch fermentation of J9UΔ xylD -P8 xylA coupled to a glucose/xylose co-feeding strategy reached up to 12.57 g/L PHA in a 5-L bioreactor under open and unsterile condition. Utilization of corn straw hydrolysate as the carbon source by J9UΔ xylD -P8 xylA reached 7.0 g/L cell dry weight (CDW) and 2.45 g/L PHA in an open fermentation. In summary, unsterile production in combination with inexpensive feedstock highlights the potential of the engineered strain for the low-cost production of PHA from lignocellulose-rich agriculture waste.
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高影响因子
FUEL
·
2025
·
IF 7.5
Jie Gao,Zijun Ran,Jingyu Ran,Xin Huang,Chuan Ma,Yunlin Shao
The catalysts utilized for low-temperature catalytic oxidation of Hg 0 from flue gas typically suffer from issues related to H 2 O and SO 2 poisoning. This study focused on doping modification of La 0.875 Ce 0.125 CoO 3 perovskite with promoters and conducted a thorough investigation on the H 2 O and SO 2 resistance through characterization and DFT methods. Experimental results demonstrated that the LCeCO/30 wt% ZrO 2 possessed optimal H 2 O and SO 2 resistance. Under high sulfur (1500 ppm SO 2 ) and high humidity (10 % H 2 O(g)) conditions, it maintained approximately 91 % Hg 0 removal efficiency after thermal regeneration cycles. Characterization results indicated that ZrO 2 doping facilitated the formation of three-dimensional macroporous structure and protected active Co 3+ sites on the surface. Based on DFT calculations, the H 2 O poisoning is attributed to competitive adsorption between H 2 O(g) and Hg 0 on the active sites. Also, the SO 2 poisoning occurs due to competitive adsorption of SO 2 and the toxicity of sulfates to the surface active sites. Meanwhile, ZrO 2 doping can lower the adsorption energies of H 2 O(g) and SO 2 by modifying their adsorption configuration, thus weakening the competitive adsorption of H 2 O(g) and SO 2 with Hg 0 . Overall, LCeCO/ZrO 2 is a promising Hg 0 removal catalyst with superior H 2 O and SO 2 resistance.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Runze Wang,Tengpeng Wang,Fangsheng Liu,Yuyao Ma,Tao Wei,Dehua Dong
Carbon-assisted solid oxide electrolysis cell (CA-SOEC) presents a promising solution for water electrolysis with reduced energy consumption and enhanced efficiency of hydrogen production. However, one key issue in optimizing CA-SOEC performance is the inefficient mass transfer at the anode layer, particularly in improving the CO–CO 2 shuttle mechanism. To address this issue, this study designs a dendritic channel anode for CA-SOEC, which significantly enhances the CO–CO 2 shuttle, realizing improved mass transfer and reduced polarization resistance. Further, an additional Pd/GDC-Ni nano-catalyst layer was incorporated at the electrode-electrolyte interface, which greatly improved the efficiency and stability of anode layer for long-term electrolysis process, presenting a current density of 1.41 A cm −2 under a low voltage of 1.0 V. This research will help to provide new ideas and technical support for the design of highly efficient and environmentally friendly anode layer of CA-SOEC for water electrolysis.
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Journal of Energy Storage
·
2024
·
IF 8.9
Xiaozhong Zhou,Xiaoyan Zheng,Hejie Lu,Hongling Deng,Zheyi Liu,Jiangwei Deng
Antimony oxides are of great promise for lithium storage due to their high theoretical capacity, but low intrinsic conductivity and large volume change during lithium-ion insertion/extraction lead to inferior cycling stability. Herein, Sb 6 O 13 nanocrystals were successfully embedded in three-dimensional (3D) honeycomb-like reduced holey graphene oxides (HrGO) sheets by H 2 O 2 -assisted solvothermal method, and the as-synthesized Sb 6 O 13 /HrGO composite was demonstrated to deliver superior electrochemical lithium-storage performance. During the preparation process, graphene oxides (GO) sheets were pretreated with H 2 O 2 to boost formation of in-plane nanoholes, which play crucial roles in both constructing Sb 6 O 13 /HrGO with unique 3D honeycomb-like structure and boosting lithium-storage kinetics. 3D interconnect HrGO sheets with honeycomb-like structure construct a stereoscopic conductive network skeleton for fast electron transfer and alleviating volume expansion of active components during charging/discharging process. Moreover, abundant in-plane nanoholes enable lithium ions to migrate cross graphene sheets, resulting in shortening diffusion distance and fastening diffusion kinetics. Thus, Sb 6 O 13 /HrGO electrode exhibited a high reversible capacity of 956.1 mA h g −1 (200 mA g −1 ) based on conversion-alloying mechanism and superior high-rate capability (493.4 mA h g −1 at 1000 mA g −1 ) for lithium storage. This work provides a facile, environmental-friendly and scalable strategy to fabricate composites with special structures for high-rate energy storage.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Kai-Yang Zhang,Han-Hao Liu,Meng-Yuan Su,Jia-Lin Yang,Xiao-Tong Wang,Edison Huixiang Ang,Zhen-Yi Gu,Shuo-Hang Zheng,Yong-Li Heng,Hao-Jie Liang,Yinglin Wang,Shuying Li,Xing-Long Wu
Expanded graphite (EG) stands out as a promising material for the negative electrode in potassium-ion batteries. However, its full potential is hindered by the limited diffusion pathway and storage sites for potassium ions, restricting the improvement of its electrochemical performance. To overcome this challenge, defect engineering emerges as a highly effective strategy to enhance the adsorption and reaction kinetics of potassium ions on electrode materials. This study delves into the specific effectiveness of defects in facilitating potassium storage, exploring the impact of defect-rich structures on dynamic processes. Employing ball milling, we introduce surface defects in EG, uncovering unique effects on its electrochemical behavior. These defects exhibit a remarkable ability to adsorb a significant quantity of potassium ions, facilitating the subsequent intercalation of potassium ions into the graphite structure. Consequently, this process leads to a higher potassium voltage. Furthermore, the generation of a diluted stage compound is more pronounced under high voltage conditions, promoting the progression of multiple stage reactions. Consequently, the EG sample post-ball milling demonstrates a notable capacity of 286.2 mAh g -1 at a current density of 25 mA g −1 , showcasing an outstanding rate capability that surpasses that of pristine EG. This research not only highlights the efficacy of defect engineering in carbon materials but also provides unique insights into the specific manifestations of defects on dynamic processes, contributing to the advancement of potassium-ion battery technology.
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Journal of Energy Storage
·
2024
·
IF 8.9
Yanchen Li,Qi Lu,Jiawei Yang,Weiwei He
Wood is widely used in human life as a natural renewable material. Improving the temperature regulation function of wood is of great significance to reduce the consumption of fossil energy and promote the construction of a low-carbon society. In this study, a phase change energy storage wood (PCES-Wood) with efficient photo-heat conversion efficiency was obtained by impregnating polyethylene glycol based composite material and graphene quantum dot grafted boron nitride (GQDs-BN) as thermal conductive filler . The results show that the thermal stability and the dispersion of GQDs-BN are improved. GQDs-BN shows strong light absorption in both UV and visible segments, and the thermal conductivity exhibited by PCES-Wood reaches 0.3916 W/(m·K) with the GQDs-BN content reaching 6 %. The phase transition temperature of PCES-Wood is between 20.29 °C and 36.29 °C, and the melting and solidification enthalpies reach 114.90 J/g and 113.70 J/g, respectively, reflecting a high latent heat value and a range suitable for human comfort temperature. 6 % GQ-BN-PCES @ Balsa also shows a low leakage rate as only 0.70 % at high temperature. After simulating sunlight exposure, the surface temperature of GQ-BN-PCES @ Balsa increases rapidly and the heat storage capacity is persistent under low-temperature conditions. The PCES-Wood prepared in this study enhances the potential of wood application in the field of temperature regulation.
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Small
·
2024
·Vol. 20
·期 50
·2406489
·
IF 13
Yijun Gao,Shanshan Song,Fei He,Xianglong Kong,Zhong Xiao,Xianchang Cui,Linbo Cao,Yumeng Zhang,Zhiliang Liu,Piaoping Yang
Silicon (Si) has attracted considerable attention as a promising alternative to graphite in lithium-ion batteries (LIBs) because of its high theoretical capacity and voltage. However, the durability and cycling stability of Si-based composites have emerged as major obstacles to their widespread adoption as LIBs anode materials. To tackle these challenges, a hollow core–shell dodecahedra structure of a Si-based composite (HD-Si@C) is developed through a novel double-layer in situ growth approach. This innovative design ensures that the nano-sized Si particles are evenly distributed within a hollow carbon shell, effectively addressing issues like Si fragmentation, volume expansion, and detachment from the carbon layer during cycles. The HD-Si@C composite demonstrates remarkable structural integrity as a LIBs anode, resulting in exceptional electrochemical performance and promising practical applications, as evidenced by tests in pouch-type full cells. Notably, the composite shows outstanding cycling stability, retaining 85% of its initial capacity (713 mAh g −1 ) even after 3000 cycles at a high current rate of 5000 mA g −1 . Additionally, the material achieves a gravimetric energy density of 369 W h kg −1 , showcasing its potential for efficient energy storage solutions. This research signifies a significant step toward realizing the practical utilization of Si-based materials in the next generation of LIBs.
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JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2024
·
IF 4.3
Hongchao Shi,Huihui Wang,Xia Cui,Ziang Gao,Jiao Jia,Haifeng Xu
Nickel vanadium layered double hydroxide (NiV-LDH) is a highly promising electrode material for supercapacitors , but its poor electrochemical durability and conductivity limit its capacitance performance as a high-performance supercapacitor electrode. In contrast, titanium nitride (TiN) stands out for its outstanding electrochemical durability and superior conductivity. In this work, a composite material (TiN@NiV-LDH) with outstanding electrochemical performance was prepared by a simple hydrothermal method , where nickel vanadium layered double hydroxide nanosheets were vertically grown in a staggered manner on the surface of amorphous titanium nitride nanoparticles . The results demonstrate that at a current density of 2 A g −1 , the capacitance of TiN@NiV-LDH reaches 712.4 F g −1 . In addition, the assembled TiN@NiV-LDH//AC asymmetric supercapacitor exhibits a high energy density of 136.5 Wh kg −1 at a high power density of 1549.9 W kg −1 , and after 10,000 cycles at a high current density of 20 A g −1 , it retains 80.2 % excellent cyclic stability. This work, based on nickel vanadium layered double hydroxide and utilizing titanium nitride modification, aims to enhance the long-term stability of nickel vanadium layered double hydroxide while preserving its advantageous properties, providing a promising strategy for designing efficient supercapacitor electrodes.
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ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Zhenya Zhang,Bolong Li,Jianghao Wang,Jing Li,Jie Fu
The quest for economical and efficient heterogeneous catalysts for the synthesis of long-chain α-olefins from biomass-derived fatty acids is of utmost significance. Regrettably, the generation of olefins by the dehydrative decarbonylation of fatty acids without the inclusion of additives is seldom documented. This scarcity is mostly attributed to the occurrence of competing decarboxylation and cracking processes. In this study, bimetallic CoZn@NC catalysts were prepared by decomposing ZIFs (CoZn) via a semisacrificial template-assisted strategy. The resulting CoZn@NC-900 catalysts are highly efficient and outperform Pt/C in stearic acid decarbonylation. In a batch reactor, these catalysts demonstrate 85.8% stearic acid conversion with up to 52.4% combined alkene yield at 350 °C for 1 h. The binding of N and Co forms the active decarbonylation sites, while Zn promotes the formation of Co subnanoparticles through spatial segregation effects, effectively reducing the acidity of the catalyst and thus ultimately inhibiting C–C cracking. Moreover, the CoZn@NC catalysts showed good stability, and the catalytic decarbonylation activity was maintained after several consecutive uses. This work presents a cost-effective strategy for the efficient catalytic decarbonylation of carboxylic acids with the inhibition of C–C cracking and shows promise for enabling the production of high-value olefins from biomass sources.
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