Applied Sciences-Basel
·
2025
·Vol. 15
·期 8
·4225
·
IF 2.5
Shaotao Xu,Liang Xu,Senhao Wang,Hanxi Wang,Sunhua Deng,Han Wang
In order to explore the potential catalysts for kerogen pyrolysis and to clear away obstacles to product liberation in product recovery, the facilitation effects of acidic chlorinated salts (MnCl2·4H2O, AlCl3·6H2O, CrCl3·6H2O, and MoCl5) on pyrolysis behavior of Huadian oil shale (OS) were investigated. Two different ways of wet mixing and dry mixing were used, and indoor pyrolysis experiments were carried out to characterize the different products collected by multiple analyses. The acidic chloride solution could effectively remove large amounts of calcite from OS during wet mixing, whereas the calcite in the dry-mixed samples decomposed significantly during pyrolysis, releasing significant amounts of CO2. AlCl3could improve the pore space by removing carbonates, which can promote the pyrolysis of kerogen and increase oil yield. The improved pore space can also promote the conversion of kerogen and the release of hydrocarbon products, while the large amounts of CO2released during pyrolysis of dry-mixed samples can promote the migration of heavy fractions. This study emphasizes the great potential of acid chlorates in counteracting reservoir blockage and facilitating pyrolysis for OS in situ exploitation.
研究领域:
石油工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2019
·
IF 7.466
Xiaoqing Cui,Xiaohui Liang,Jiabin Chen,Weihua Gu,Guangbin Ji,Youwei Du
Here, we report a unique core-shell nanocomposite of Fe 2 N@N-doped carbon that coats dopamine-derived carbon shells on porous Fe 2 N nanoparticles via a facile and effective soft chemical method . The feasibility of preparing core-shell structure in the process of polymerization is realized by utilizing the fact that affluent amino and hydroxyl groups in dopamine endow the formidable chelation ability with metal ions. Temperature-dependent volume shrinkage effect of Fe 2 N originates from the lattice transformation in nitridation process, which is the key factor to control the void space inside carbon nanocubes and optimize the electromagnetic performance. Consequently, the as-prepared samples achieve excellent reflection loss (RL) values and effective absorption bandwidth at an even thin thickness of 1.4 mm. The balance between the temperature-dependent conduction loss and the optimization of hole structure impedance matching may be responsible for the excellent microwave behaviors. This work offers an attractive core-shell Fe 2 N@carbon with controllable void space as a promising candidate to handle the electromagnetic interface (EMI) issues.
研究领域:
材料科学
·
纳米技术
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Na Zhang,Yufei Zhang,Ting Wang,Wenqing Ge,Tiezhu Zhang,Lipeng Zhang,Weimin Zhang
Silicon-based materials are promising high-capacity anodes for lithium-ion batteries (LIBs). However, they suffer from rapid fracture and pulverization due to extreme volume expansion (theoretically higher than 300%) during the alloying/dealloying reactions with Li. In this work, we demonstrated a simple and mild method by using calcium carbonate as the template to prepare a Si/carbon-based anode material with rich void space (Si@void@C) for LIBs. The yielded void space successfully accommodated the large volume change during the cycling process. The electrochemical characterization verified that the Si@void@C anode exhibited an excellent specific capacity of 973.2 mA h g −1 and high-capacity retention of 84.9% after 100 cycles at a current density of 300 mA g −1 . The morphological study also confirmed that the Si@void@C electrode exhibited the lowest volume changes after many cycles of the charge/discharge process among the electrodes. In addition, the comprehensive performance of Si@void@C was remarkably better than those of Si@C and bare Si electrodes. Hence, Si@void@C is a promising high-capacity anode for next-generation LIBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2015
·
IF 3.453
Tifeng Xia,Jianfeng Cai,Huizhen Wang,Xing Duan,Yuanjing Cui,Yu Yang,Guodong Qian
Two isostructural metal-organic frameworks (MOFs) Cu 2 TPTC-Me and Cu 2 TPTC-OMe have been synthesized and characterized. The as-synthesized MOFs show good thermal stability and hydrothermal stability. With open metal sites, suitable pore spaces and functional groups to confine acetylene molecules in frameworks, both MOFs exhibit high gravimetric acetylene storage capacities: Cu 2 TPTC-Me has a gravimetric capacity of 203 cm 3 g −1 at 298 K and 1 bar, and Cu 2 TPTC-OMe has the highest gravimetric acetylene storage capacity ever reported with the capacity of 204 cm 3 g −1 under the same conditions. Furthermore, Cu 2 TPTC-Me possesses both high separation selectivities of C 2 H 2 /CH 4 and C 2 H 2 /CO 2 with the Henry law's selectivity of 60 and 12.7 at room temperature, respectively.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Guodong Zhang,Zhe Liu,Daming Liu,Yan Lin,Fei Wang
The volume penalty of nano-porous materials causes low methane volumetric adsorption capacity, and the contradiction between it and gravimetric adsorption capacity limits the application of nano-porous materials in different scenarios. Here, we prepared a composite nano-porous material of ZIF-8@AC to bridge the gap using a synergistic approach of adsorption and hydration, and methane isothermal adsorption in wet ZIF-8@AC was evaluated under low temperature. Due to the hybrid effect of adsorption and hydration, methane storage capacity in the nano-porous material was enhanced. When 100 mg activated carbon was doped, methane gravimetric adsorption capacity in ZIF-8@AC increases by 6.78 % and 30.34 % comparing with that in parent AC and ZIF-8 separately. In addition, the formation of hydrate increases methane storage density in mesopores, macropores and intergranular pores, giving rise to large methane volumetric adsorption, which increases by 12.65 % and 53.24 % comparing with that in parent AC and ZIF-8, respectively. Moreover, hydration efficiency in confined pore space was investigated by differential scanning calorimetry (DSC), while a high-resolution electron microscope was applied to record hydrate morphologies. It was found that hydrate mainly forms in large pore spaces, and the enhanced intergranular pores serve as nanoreactors to significantly improve the hydration efficiency, which is greatly influenced by local water distribution. These findings provide a new strategy to enhance methane adsorption via adsorption and hydration hybrid approach and would shed light on the application of composite nano-porous materials in the adsorption of natural gas.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ENERGY
·
2024
·
IF 9
Jinlong Cui,Xiaohui Wang,Yalong Li,Zhenxi Wang,Guangjin Chen,Liwei Cheng,Sheng Xu,Meng Cao,Liwei Sun
Since the thickness of hydrate-bearing sediments is usually tens to hundreds of meters, the influence of gravity on hydrate dissociation characteristics can no longer be ignored. In this study, experimental simulations were designed to investigate the influences of gravity on hydrate dissociation characteristics by depressurization . The experimental results showed that for sealed water-rich marine hydrate reservoir, gravity could cause more water to migrate downward. The free pore space in sediments was thus rapidly vacated, resulting in faster hydrate dissociation and gas production. The average gas production rate increased from 0.018 mol/min to 0.038 mol/min. In addition, the free pore space at the top of the sediments was vacated first. Hydrate dissociation there was thus faster. For unsealed water-rich marine hydrate reservoir, gravity could not only cause more and faster migration of water, but also more easily cause the formation of dominant channels for water migration, leading to an effective reduction in reservoir pressure . The cumulative water yield increased from 1380g to 8950g. Hydrate thus dissociated. Hydrate dissociated faster at positions close to the mining well where the pressure was lower. These findings can provide deep insights into the spatial evolution of multiphase flows during the exploitation of natural gas hydrates .
研究领域:
地质学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Guodong Zhang,Mengting Sun,Bingjie Liu,Fei Wang
Despite confined nanospace is known as corresponding to fast hydrate kinetics, hydrate nucleation and growth mechanisms behind the promotion effect have not been thoroughly understood. Here we estimated hydrate nucleation and growth kinetics in confined porespace and proposed a new adsorption-induced two-way nanoconvection mechanism, which may constitute the essence of the confinement effect. Hydrate formation kinetics loaded by activated carbon (AC) suggest a discrete two-stage adsorption that attributes to methane physical adsorption and hydrate formation, respectively, and the promotion of methane physical adsorption on hydrate nucleation in inner pores was first presented. Impressively, the two-way convection at molecular scale gives rise to hydrate fibers, which grow out from inner pores and significantly depend on the contents of pre-adsorbed water, and this finding inversely confirms the nanoconvection mechanism. This work provides a novel perspective on improving the understanding of hydrate nucleation and growth kinetics in confined porespace and sheds light on the application of AC-based methane storage.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Cheng-Zhen Nie,Liang Wang,He-He Tian,Xu-Hui Huang,Lei Qin
This study aimed to investigate the effects of ultrasound-assisted curing and UV-assisted drying on the quality of semi-dried tilapia fillets through flavoromics, lipidomics, and metabolomics. Both treatments enhanced myofibril pore space and reduced moisture content (−14.84 %, P < 0.05), with ultrasound demonstrating greater effectiveness. Additionally, they also facilitated lipid oxidation ( P < 0.05), which altered the flavor profile. UV treatment enhancing key aroma compounds (ROAV >1), especially octanal, 1-octen-3-one, ethyl-isovalerate, and 2-pentyl-furan, more effectively than ultrasound ( P < 0.05). 420 lipid molecules and 213 metabolites were identified, including 162 differential lipids and 69 differential metabolites (VIP > 1). Correlation analysis indicated that triglycerides, fatty acids, organic acids, and nucleosides were key precursors of flavor. The sensory evaluation demonstrated that ultrasound and UV treatments synergistically enhanced fillet quality. This study introduces an innovative processing method aimed at the industrialized and efficient production of high-quality air-dried aquatic products.
研究领域:
食品科学
·
风味化学
·
脂质化学
·
代谢组学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）