JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2025
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IF 6.2
Ke Yang,Gang Wu,Bo Zhang,Liangyuan Jia,Huiyan Zhang
Catalytic fast pyrolysis (CFP) is one of the most efficient methods for directly converting biomass into green aromatics. Although ZSM-5 catalyst is efficient at producing aromatics, the catalyst deactivation brings challenge to industrial applications. Constructing additional mesoporous structure in ZSM-5 catalyst can overcome this drawback. In this study, two solid wastes are used as raw materials to synthesize hierarchically porous ZSM-5 catalyst based on solvent-free method, aligning with the target of “green chemistry”. Comparing with the commercial ZSM-5 catalyst, the synthesized catalyst achieves a higher BTX yield (benzene, toluene, and xylene), with increases of approximately 44 %, 7 %, and 12 %, respectively. The mesopore-to-micropore volume ratio is a key factor in determining catalytic efficiency. Moreover, PI-MS is used to monitor the deactivation behavior of catalyst online during the CFP process, showing that the synthesized catalyst has a slower deactivation rate. The hierarchically porous structure plays a crucial role in slowing the transformation of oxygenated coke into graphite-like coke, which is a major contributor to catalyst deactivation. This work can provide a green and convenient method for producing hierarchically porous ZSM-5 catalyst and be useful for improving the selectivity of aromatic compounds, offering a promising alternative to conventional ZSM-5 catalyst in industrial applications.
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高影响因子
JOURNAL OF THE ENERGY INSTITUTE
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2025
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IF 6.2
Runtian Xia,Mingxing Liu,Naixin Wang,Ke Wang,Junqiang Li,Yanxuan Fan,Zhaolin Fu,Jie Zhao,Qundan Zhang,Wei Wang,Yanbo Hou,Zhiping Tao
Waste tire pyrolysis oil (WTPO) serves as a valuable feedstock for sustainable fuels and high-value-added chemicals. However, the silicon content and siloxane content of WTPO have not been observed in detail, and the similarity of siloxane morphology between WTPO and commercial gasoline and diesel has not been discussed in depth. To address this gap, our research group collected 24 WTPO samples from China, along with 3 commercial gasoline samples and 4 commercial diesel samples exhibiting abnormal silicon content, between 2023 and 2025. The silicon content and siloxane content of the samples were determined by inductively coupled plasma optical emission spectrometer (ICP-OES) and gas chromatography-quadrupole mass spectrometry (GC-MS), respectively. The results indicate that the silicon content ranges of WTPO are <1 ppm to 3674 ppm. Analysis of siloxane morphology revealed that cyclic permethylsiloxanes (Dn, where n denotes the number of Si atoms) are widely present in WTPO. In the detected WTPO samples, the maximum contents of D4, D3, and D5 reach 2251 ppm, 923 ppm, and 475 ppm, respectively. Furthermore, the type and content distribution of cyclic methyl-siloxanes in high silicon content WTPO, high silicon content gasoline, and high silicon content diesel samples demonstrate a strong similarity. This study emphasizes that the potential threats posed by silicon-containing molecules in WTPO to the environment, organisms, and industrial equipment should be evaluated in advance of large-scale commercialization.
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高影响因子
DESALINATION
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2025
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IF 9.8
Yangfeng Wu,Haopeng Feng,Jing Tang,Chenrui Lan,Nile Wu,Nana Chai,Jiawei Yue,Lin Tang
Removing heavy metals from electroplating wastewater and selectively capturing precious metals is a significant challenge. This work combines biochar with MOF materials to design a green CDI electrode with high adsorption capacity and selectivity. The CDI electrode realizes the efficient separation of metal ions through the synergistic action of physical and chemical adsorption. The experimental results show that it can achieve 99 % selective recovery of Ag + and 100 % selective removal of Pb 2+ in mixed metal solutions. In comparison, the removal capacity of other metal ions does not exceed 7 %, such as Al 3+ , Cu 2+ and Zn 2+ . This work also studied the regulation mechanism of the material at different temperatures. Experimental results and theoretical calculations show that with the increase of pyrolysis temperature, the metal ions in the biochar-based MOF material are gradually converted into metal oxides (300 °C), metal nitrides (600 °C), and pure metals (900 °C). The generated metal oxides and metal nitrides have a higher affinity for Pb 2+ and significantly enhance the electrode material's charge storage capacity and capacitance. The life cycle assessment results show that this strategy's impact on the environment is significantly smaller than that of the current industrial electrocoagulation technology, providing a new idea for the harmless and resource-based treatment of electroplating wastewater.
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高影响因子
JOURNAL OF THE ENERGY INSTITUTE
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2024
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IF 5.6
Shu-Ting Hu,Yue-Lun Wang,Qing-Gang Wang,Han-Bing Gao,Wen-Jie Gu,Wei-Hua Zhao,Yun-Peng Zhao,Jing-Pei Cao,Lin-Jun Zhu
The introduction of in situ hydrogen donors to obtain a high H/C eff ratio is an effective way to upgrade coal pyrolysis volatiles to light aromatics. In this study, the influence of different in-situ hydrogen suppliers in catalytic reforming of coal pyrolysis vapors was explored. The abilities of active hydrogen donation were greatly corresponded to structures of hydrogen donors. Isopropanol showed the best catalytic performance due to the release of a large amount of active α-H as a result of negative inductive effect of hydroxyl. Whereas tertbutanol showed the poorest catalytic performance owing to the lack of α-H. Meanwhile, the effect of in-situ hydrogen production via steam reforming with different alcohols on light aromatic yields was investigated. The highest BTEXN yield was obtained under in-situ hydrogen production from isopropanol steam reforming. Two circumstances of hydrogen supply were further compared. Relatively higher BTEXN yield was presented in the reaction of methanol steam reforming than that of using methanol solely. However, higher BTEXN yield was contrarily obtained from sole isopropanol as a hydrogen donor despite lower H 2 production was gained compared to the case of isopropanol steam reforming. The fact was probably ascribed that high electron-withdrawing effect of hydroxyl for isopropanol promoted the cleavage of α-C-H bond and favored the transfer of active hydrogen to reactants over acid sites.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Yanbing Li,Zizhao Guo,Ya Qiu,Wenshen Yang,Lin Lang,Chuangzhi Wu,Chunhuan Luo,Xiuli Yin
Developing efficient, stable adsorbents for post-combustion CO 2 capture remains challenging, owing to competitive H 2 O adsorption, active component loss, and inactive byproduct formation. In this work, we report a one-step pyrolysis-activation strategy synthesizing herb-residue biochar co-anchored with K 2 CO 3 and K 2 FeO 4 (HPPF), enabling stable CO 2 capture under humid conditions via synergistic K Fe interactions. Compared with conventional post-impregnation methods, this approach enhances microporosity through molten-salt activation and reduces K vaporization by 56 % via Fe-O-K interfacial bonding, while disrupts K Ca interactions to prevent K 2 Ca(CO 3 ) 2 formation. The HPPF adsorbent exhibits a superior CO 2 capacity of 2.20 mmol g −1 at 60 °C under humid conditions (20 % CO 2 ), outperforming K 2 CO 3 -loaded biochar (HPC, 1.57 mmol g −1 ) and demonstrating a balanced H 2 O/CO 2 co-adsorption ratio (0.96, compared with 3.21 for HPC). In situ FTIR/XRD analyses reveal Fe accelerats the direct conversion from K 2 CO 3 to KHCO 3 , without formation of the hydrated intermediates. Furthermore, multi-model kinetic fitting confirmed Fe’s dual role in enhancing surface reactivity and modifying diffusion behavior. HPPF retained 99.1 % of its initial capacity after over nine adsorption-desorption cycles, demonstrating exceptional structural reversibility and cyclic durability. The estimated raw material cost (~$3.79 per kg CO 2 ) further supports its practical viability for scalable, low-cost carbon capture. This stable cycling capability of HPPF allows its incorporation into delayed feedback carbon cycles. In such systems, biochar accumulated during pyrolysis batch processes can progressively offset the CO 2 emissions generated by the biomass, offering a viable route for carbon-negative utilization.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2025
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IF 6.2
Kailei Xu,Yumin An,Zanchao Gao,Yehong Cheng,Libin Zhao
A method combining low-temperature demolding with precursor infiltration and pyrolysis (PIP) for preparing C f /SiC-ZrB 2 ceramic composites with bouligand structure is proposed. First, C f /SiC-ZrB 2 -PCS ceramic films were prepared using polycarbosilane (PCS), carbon fiber, and SiC-ZrB 2 ceramic particles through liquid nitrogen demolding technology. Then, C f /SiC-ZrB 2 green body with bouligand structure was achieved by helically assembled and pre-crosslinked C f /SiC-ZrB 2 -PCS ceramic films at a fixed angle. Finally, precursor infiltration and pyrolysis method was employed to densify the C f /SiC-ZrB 2 ceramic composites with bouligand structure using PCS. The mechanical properties of the composites with different carbon fiber contents were investigated, revealing that at a carbon fiber content of 30%, the composites exhibited a flexural strength of 358.9 MPa, a fracture toughness of 10.4 MPa·m 1/2 , and a work of fracture of 2445.4 J·m -2 . The toughening mechanism of C f /SiC-ZrB 2 ceramic composites with bouligand structure was elucidated through two-dimensional crack propagation analysis via scanning electron microscopy (SEM) with three-dimensional fracture network reconstruction using synchrotron X-ray computed tomography (CT).
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Materials Chemistry Frontiers
·
2019
·Vol. 3
·期 7
·1398-1405
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IF 0
Ang Li,Binbin Qian,Ming Zhong,Yingying Liu,Ze Chang,Xian-He Bu
Metal–organic frameworks (MOFs) have been utilized as templates/precursors for the synthesis of metal oxide anode materials of lithium-ion batteries, due to their large accessible surface, tunable pore size, and various metal centers. However, the same phase of materials derived from different MOFs could show diverse capacities and performances. In this study, aiming at an in-depth understanding of the structural relationship between the precursors and the product, we chose two MOFs with the same linker as templates/precursors for Co3O4 nanomaterials. The structure and component evolution in the pyrolysis process were analyzed, and the electrochemical properties of the resulting Co3O4 were studied. The results showed that the concentration of metal centers and the strength of coordination bonds in the MOFs were critical factors that determined the morphology and performances of the resulting material.
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INORGANIC CHEMISTRY
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2022
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IF 5.436
Na Sun,Linlin Xiang,Bingsen Zhuge,Erjie Kan,Nan Yu,Lei Li,Long Kuai
Low-temperature catalytic CO oxidation is an important chemical process in versatile applications, such as the H2 utilization for low-temperature H2 air fuel cells. Pt-group metal catalysts are efficient but highly cost-consuming. This work demonstrates an excellent and sixpenny catalyst with earth-abundant Ni and Ce, in which Ni ions are atomically incorporated into the CeO2 matrix (Ni–Ce–Ox) by synchronous spray-pyrolysis (SSP) of mixture nitrates of Ni and Ce. The Ni–Ce–Ox catalyst presents a mesoporous structure. Revealed by a model reaction of 1% CO, 1% O2, and 98% balance He at a space velocity of 13,200 mL/gcat/h, Ni–Ce–Ox catalysts display a typical volcano-shaped relationship between reactivity and Ni incorporation amount. The optimized Ni incorporation appears with a high Ni/Ce atomic ratio of 0.25, endowing the T50 (temperature corresponding to a CO conversion of 50%), which is lower-shifted by 165 °C than that of pristine CeO2 (266 °C). The density functional theory (DFT) calculations further indicate that the much-reduced oxygen vacancy formation energy at Ni–Ce single-atom sites boosted the adsorption activation of the CO molecule and therefore promoted the CO oxidation process. Besides, the2 Ni–Ce–Ox from the SSP method presents better performance than the counterparts from immersion and hydrothermal methods. This work paves a way to access efficient noble-metal-free catalysts for low-temperature CO oxidation.
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高影响因子
Micro & Nano Letters
·
2020
·Vol. 15
·期 8
·540-544
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IF 0.975
Mengsi Song,Chaoqian Liu,Nan Wang,Tingting Lun,Xiaona Zhai,Qing Ge,Xiaoyang Zhang,Sumei Wu,Shimin Liu,Hualin Wang,Weiwei Jiang,Wanyu Ding
The sol–gel method based on the rapid pyrolysis process was adopted to prepare Ni 1− x Cu x O ( x = 0–0.1) films on glass substrates. The effects of Cu doping on the structural, morphological, electrical and optical properties of the films were characterised by X-ray diffractometer, scanning electron microscope, Hall effect instrument and ultraviolet-visible spectrophotometer, respectively. The NiO-based films have a cubic rock salt structure and it was found that the film with x = 0.06 should have minimal residual stress. The transmittance and bandgap of the films decreased with increasing Cu-doping concentration. In addition, the compactness of the films increased along with the increase of Cu-doping concentration as a whole. The carrier concentration of the films was almost invariable, but the carrier mobility was determined by the competition between the effects of the morphology and the ionised impurity scattering. The resistivity of the films first decreases and then increases, and the minimum resistivity was 182.1 Ω cm at x = 0.06.
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高影响因子
FUEL
·
2025
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IF 7.5
Binbin Chen,Hong Tian,Zhen Zhou,Yanni Xuan,Zhijie Wang,Siying Liu
A combined pretreatment of straw was carried out using acid washing and torrefaction methods. Metal-modified HZSM-5 core–shell molecular sieves were prepared by loading Zn (2, 4, and 6 wt%) and Ni (6, 8, and 10 wt%) on HZSM-5 molecular sieves and introducing MCM-41 core–shell structure. PY-GC/MS and a tubular furnace were employed to study the effects of pretreatment conditions and catalysts on the product composition distribution during wheat straw catalytic pyrolysis. XRD, SEM, BET, TPD and ICP were used to characterize the catalyst performance. It was found that the combined acid washing and torrefaction pretreatment reduced the oxygenated compounds in the bio-oil from straw catalytic pyrolysis and increased the bio-oil yield to 29.37 %. The incorporation of modified catalysts promoted the deoxygenation, zwitterionization and aromatization reactions during the straw-catalyzed pyrolysis. The monometallic loading of 4%Zn/HZ and 8%Ni/HZ catalyzed acid washing and torrefaction straw pyrolysis resulted in 54.2 % and 57.06 % yields of MAHs and 42.86 % and 38.58 % yields of BTX in bio-oil, respectively.Compared with the monometallic loading, 4%Zn8%Ni/HZ further optimized the bio-oil compositional distribution, with a MAHs yield of 64.76 %, a BTX yield of 54.69 %, and a deoxygenation performance of 81.34%.MCM-41-coated HZSM-5 produces a large mesoporous structure with channels with sufficient transport capacity, accelerating the cleavage of various types of oxygen-containing compounds in the bio-oil into smaller molecules for better conversion into aromatics. The 4%Zn8%Ni/H@M catalyst achieved a MAHs yield of 72.68 % and BTX yield of 63.43 % in the bio-oil during pyrolysis of acid-washed and torrefied wheat straw, with oxygen removal efficiency reaching 85.37 %. Therefore, the combination of feedstock pretreatment and metal-modified core–shell HZSM-5 molecular sieve could synergistically optimize both compositional distribution and production yield of bio-oil derived from biomass pyrolysis.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Chunlin Zheng,Weiwei Qi,Mingqiang Ning,Lan Xiang,Tao Liu,Yuanyuan Li,Ganggang Lv,Qiang Wu,Qikui Man,Baogen Shen
Prussian blue analogs (PBA) derivatives have been researched extensively as electromagnetic wave (EMW) absorbers. However, the metallic components are typically transition-metal elements, which results in limited potential for optimization of their EMW absorbing performance. In this work, GdCo-PBA derivates with different carbon nanotubes (CNTs) morphologies and phase compositions were synthesized via tuning the pyrolysis rate and the dielectric loss capability can be tuned. As a result, the R-GdN/Co@CNTs achieved the minimum reflection loss ( RL min ) of −36.74 dB@1.7 mm and the maximum effective absorption bandwidth (EAB) of 5.61 GHz @ 2.0 mm due to the combined effect of the interconnected CNTs conduction network and the GdN phase in optimizing the impedance matching and enhancing the dielectric loss. Meanwhile, the radar cross section (RCS) simulation and electrochemical corrosion tests confirmed that GdCo-PBA derivatives can significantly reduce RCS values of 28.6 dBm 2 @ 15° and possessed satisfied anti-corrosion properties with a corrosion current density of 2.06 × 10 −5 A/cm 2 and polarization resistance of 2.57 × 10 4 Ω, which displayed significant potential for practical applications in extreme marine environments. This work presents a strategy for synthesizing lanthanide PBA derivates with the EMW absorbing and anti-corrosion properties.
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高影响因子
Journal of Cleaner Production
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2020
·
IF 7.246
Shanshan Shao,Xinggang Hu,Wenbin Dong,Xiaohua Li,Huiyan Zhang,Rui Xiao,Yixi Cai
Aldol condensation of biomass-derives coupled with hydrogenation is a promising route for the production of renewable aviation fuel. In this study, a bifunctional catalyst was prepared to integrate the aldol condensation of cyclopentanone and hydroprocessing for aviation fuel in one pot. Due to its strong mild-basic sites, Mg–Al–O performed the best with the total yield of dimer and trimer of 80.4%. Nickel was screened out to be favorable for hydrogenation. Considering the unsatisfactory porous structure of Ni/Mg–Al–O, the bifunctional catalyst was prepared with activated carbon (AC) as carrier. With Ni loading of 20 wt%, the maximum yield of targeted alkanes reached 81.1% over Ni/Mg–Al–O/AC. The calcination and reduction temperature in the preparation process were both optimized at 550 °C. In the reusability test, the yield of targeted alkanes reduced to 31.6% in the 5th run. To attenuate the hydration effect, n-pentane was introduced as solvent, and the bifunctional Ni/Mg–Al–O/AC performed stably in 5 runs. By the design of bifunctional catalyst based on the theoretical basis to realize the integration of C–C coupling and hydrogenation in one pot, it will promote the development of aviation fuel from biomass in a more sustainable and green way.
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高影响因子
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