Energy & Environmental Materials
·
2020
·Vol. 3
·期 4
·535-540
·
IF 0
Yang-Peng Lin,Bing Xia,Sanlue Hu,Yu Zhong,Yue-E Huang,Zhi-Zhuan Zhang,Ni Wu,Yong-Wei Wu,Xiao-Hui Wu,Xiao-Ying Huang,Zewen Xiao,Ke-Zhao Du
Bromine is an irreplaceable reagent for many important applications including necessary additive for flame retardants and rubber treatment. However, the toxicity, causticity, and vaporability of bromine make the safe usage and transportation of bromine challenging, which can be alleviated by the bromine prefixation. Herein, vacancy-ordered bromide perovskites such as Cs 4 Sb 2 Br 12 and Cs 2 PdBr 6 are selected out for the bromine fixation through density-functional theory calculations and experiments. The redox within the bromide perovskites is designed to provide the driving force for the reversible release and fixation of bromine. Heating and cooling the title bromide perovskites in a necked ampoule make the bromine visible and separable from the solid residue. The composition engineering ( i.e. , Cs 4 Sb 2 Br 12 vs Rb 4 Sb 2 Br 12 , and Cs 4 Sb 2 Br 12 vs Cs 2 PdBr 6 ) can effectively tune the stability (against water and high temperature) and the bromine storage capacity (from 9.30% to 18.76%). In addition, this work can provide a one-step preparation method for the liquid bromine without further purification.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
Catalysts
·
2022
·Vol. 12
·期 5
·485
·
IF 4.501
Chong Chen,Yun Li,Jilin Cao
Methane hydrate has been extensively studied as a potential medium for natural gas storage and transportation. Due to their high specific surface area, tunable porous structure, and surface chemistry, metal–organic frameworks are ideal materials to exhibit the catalytic effect for the formation process of gas hydrate. In this paper, hollow ZIF-8 nanoparticles are synthesized using the hard template method. The synthesized hollow ZIF-8 nanoparticles are used in the adsorption and methane hydrate formation process. The effect of pre-adsorbed water mass in hollow ZIF-8 nanoparticles on methane storage capacity and the hydrate formation rate is investigated. The storage capacity of methane on wet, hollow ZIF-8 is augmented with an increase in the mass ratio of pre-adsorbed water and dry, hollow ZIF-8 (RW), and the maximum adsorption capacity of methane on hollow ZIF-8 with aRWof 1.2 can reach 20.72 mmol/g at 275 K and 8.57 MPa. With the decrease inRW, the wet, hollow ZIF-8 exhibits a shortened induction time and an accelerated growth rate. The formation of methane hydrate on hollow ZIF-8 is further demonstrated with the enthalpy of the generation reaction. This work provides a promising alternative material for methane storage.
研究领域:
材料科学
·
能源存储
·
化学工程
✓ 已验证
DOI
高影响因子
FUEL
·
2020
·
IF 5.578
Yuan-Mei Song,Ru-Quan Liang,Fei Wang,Dan-Hui Zhang,Liu Yang,Deng-Bo Zhang
The hydrate-based technology has been viewed as a great potential approach for the natural gas storage and transportation, whose commercialization however is challenged by the limited energy storage efficiency and slow formation kinetics. In this work, we used carbon nanotubes (CNTs) as carriers and covalently grafted functional group of -SO 3 - (similar to the hydrophilic group contained in sodium dodecyl sulfate) onto the nano-carriers surface to prepare a novel promoter, sulfonated carbon nanotubes (SCNTs). The SCNTs nanofluid showed higher dispersity and stability than the pristine CNTs (PCNTs). In the methane hydrate formations, the high methane storage capacity of 142 v/v in the SCNTs nanofluid was achieved, whereas 50–65 v/v was obtained with the oxidized CNTs (OCNTs) or PCNTs as promoter. Interestingly, the larger number of sulfonate groups grafted on CNTs, the shorter hydrate formation period and the smaller hydrate reaction stochasticity were obtained. The formation rate was enhanced from 0.237 mmol/(mol water·min) to 0.413 mmol/(mol water·min) when SCNTs concentration grew from 25 mg/L to 150 mg/L. Additionally, the SCNTs kept excellent recycling performance at ten reuses in the methane hydrate formations, which was meaningful to the actual hydrate-based gas storage and transportation.
研究领域:
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2021
·
IF 3.605
Xuejian Liu,Quan Cao,Dongyan Xu,Shengjun Luo,Rongbo Guo
Carboxylate surfactants derived from hydrolysis of a renewable triglyceride were adopted as promoters in the synthesis of methane hydrate. The paper investigated the effects of surfactant carbon chain length, different counter ions, salt concentration, and additives on the promotion. It was found that sodium laurate (SL) exhibited better performance than the other surfactants, i.e., sodium decanoate (SD), sodium myristate (SM), sodium palmitate (SP), and sodium oleate (SO). At 4 mmol/L SL, the gas-storage capacity could reach 144 (v/v, the volume of methane stored by one volume of hydrate) during an induction time as short as 17 min. The decomposition of methane hydrate with SL as a promoter could avoid surfactant loss and make its recycling feasible because there was nearly no foam produced. Though sodium chloride, alcohols, and alkane could make the SL solution more surface-active, they have no obvious or even negative effect on methane hydrate formation. The high methane-storage capacity, short reaction time, and no foam generation during hydrate decomposition make SL a promising promoter to be used in large-scale applications.
研究领域:
化学工程
·
可再生能源
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2020
·
IF 3.421
Qiongqiong Jiang,Yali Cao,Xiangyu Liu,Hao Zhang,Hui Hong,Hongguang Jin
Chemical looping combustion (CLC) can achieve the benefits of efficient conversion of hydrocarbon fuels and zero-energy CO2 capture using oxygen carriers (OCs) with facilitated oxygen transport properties. The current study details the use of Cu- and Ca-doped lanthanum nickel perovskite-type materials as the OC in CLC processes. By incorporation of lanthanum nickel oxide with copper and calcium, the oxygen storage capacity and average transport rate of La1–yCayCuxNi1–xO3 are up to 7.8 wt % and 0.82 wt % min–1, respectively, during the methane CLC process at 400 °C, whereas undoped LaNiO3 cannot react with methane at a low temperature. Simultaneously, substituted lanthanum nickel oxides can decrease the oxygen transport temperature by about 70 °C compared to undoped lanthanum nickel oxide. X-ray diffraction, Brunauer–Emmett–Teller, and scanning electron microscopy of the samples were characterized in terms of particle properties and morphology to unveil the rational reasons of the high oxygen transport at lower temperatures. The enhancement of the specific surface area and stable porous morphology in La1–yCayCuxNi1–xO3 can both facilitate the oxygen transport in CLC processes. Experiments were executed to investigate the reactivity of the redox materials on the standpoints of oxygen capacity, stability, and regenerability. Hydrogen and methane as the fuels are both considered in this study. La1–yCayCuxNi1–xO3 showed favorable reactivity and stability in the successive redox cycles at low temperatures. These experimental results indicate that La1–yCayCuxNi1–xO3 can facilitate O2– transport and have the potential to be used as the promising OC for low-temperature CLC processes.
研究领域:
能源化学
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材料科学
·
化学工程
·
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2025
·
IF 5.2
Lanyun Wang,Chao Yu,Yongliang Xu,Tingxiang Chu,Zhengyan Wu,Kun Zhang
Hydrate-based solidification of CH 4 storage and transportation is a potential technology which will be utilized in the separation of coal-bed gas, natural gas and biomass gas. Chemical additives and porous materials are usually used for accelerating the CH 4 hydrate formation and increasing the CH 4 capacity. Here, the silicon carbide foam ceramics (SFC) as a porous medium in combination with tetrabutylphosphonium bromide ([P 4 4 4 4 ]Br) and 1,3-dioxolane as chemical promoters were used to influence CH 4 hydrate formation and decomposition properties. The experimental results show that the presence of SFC leads to shortened induction time of CH 4 hydrate nucleation by 15 ∼ 25 % and increased gas storage capacity by 30 ∼ 40 % compared to that in pure water. Adding [P 4 4 4 4 ]Br reduces the induction time by only 3 %–10 % while increases gas capacity by nearly 30 %. In contrast, the 1,3-dioxlane demonstrates superior effectiveness in promoting CH 4 hydrate growth with induction time shortened by 40 %–60 %. Compared to pure water systems, SFC + 1,3-dioxolane may enhance the gas capacity of around 80 %. In terms of dissociation process, CH 4 hydrate formed in the SFC have lower dissociation temperature and shorter pre-dissociation time, indicating that hydrate formed in the porous space is easy to decompose. Moreover, after adding 1,3-dioxolane, the decomposition time was shortened further. However, 30PPI SFC is optimal for its higher dissociation temperature and longer pre-dissociation time.
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
Energy & Environmental Materials
·
2022
·Vol. 6
·期 6
·e12486
·
IF 13.443
Dong Chen,Xin Ren,Ting Li,Zhongxue Chen,Yuliang Cao,Fei Xu
Rechargeable Mg batteries (RMBs) are a promising large-scale energy-storage technology with low cost and high safety, but the performance is limited by the inferior kinetics of Mg-intercalation cathodes. In the present study, an octylamine-supporting interlayer expanded molybdenum diselenide (e-MoSe 2 ) is synthesized and used as cathode for RMBs, in comparison with ordinary crystalline MoSe 2 . The octylamine molecules introduced show a strong interaction with the MoSe 2 layers and increase the layer spacing significantly from 6.46 to 11.5 Å. e-MoSe 2 shows a high Mg-storage capacity of 238 mAh g −1 at 50 mA g −1 and a superior rate performance of 39 mAh g −1 at 10 A g −1 , far advantageous over crystalline MoSe 2 . e-MoSe 2 also shows a considerably high structure stability during repeated magnesiation/demagnesiation, providing an outstanding cycling stability for 1000 cycles. Further electrochemical tests demonstrate the high Mg 2+ diffusion coefficients in e-MoSe 2 . Theoretical computation indicates the interlayer expansion changes the Mg 2+ diffusion paths from “hollow site → hollow site” to “hollow site → Se atom site → hollow site”, largely decreasing the energy barrier and improving the Mg 2+ diffusion kinetics. The present work highlights an efficient strategy for the improvement of Mg-storage performance for RMB cathodes.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Guodong Zhang,Runcheng Zhang,Yaning Kong,Fei Wang
It was recently found that halogen salts can facilitate hydrate formation at low concentrations, and this finding provides new ideas on hydrate-based adsorption-hydration natural gas (AHNG) technology by using diluted seawater so as to save fresh water. However, complicated hydrate formation kinetics was commonly anticipated due to ion specific effect, while porous surface further enhances the effect. To improve the understanding of the synergy of ion specific effect and porous surface on hydrate formation kinetics, hydrate formation loaded by activated carbon (AC) in the presence of 4 halogen salts was carried out. It was found that both of promotion and antagonism effect appears in the ion-porous surface system, KI performs the best on promoting hydrate nucleation, and hydrate induction period even disappears when 0.05 wt% KI was applied. In contrast, 0.1 wt% NaCl enhances methane storage capacity and performs excellent at high water contents, and an average increase of 9.6 V/V in methane storage capacity was obtained for different water contents. The promotion mechanisms of specific ions on hydrate formation were speculated, and I − and Na + were found to perform better on enhancing hydrate nucleation and conversion, respectively. I − can induce interfacial hydration shells to promote hydrate nucleation, while the porous surface significantly increases gas–liquid contact area and enhance the promotion, and Na + improves water-to-hydrate conversion in confined porespace due to ion selection induced by confinement.
研究领域:
化学工程
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2018
·
IF 3.12
Wen Xie,Yunbo Yu,Hong He
Pt/BaO/Al 2 O 3 catalysts with different BaO loadings prepared from Al 2 O 3 nanorods (Pt/BaO/Al 2 O 3 -nr) and irregular Al 2 O 3 nanoparticles (Pt/BaO/Al 2 O 3 -np) were investigated for NO x storage and reduction (NSR). The Pt/BaO/Al 2 O 3 materials derived from Al 2 O 3 nanorods always exhibited much higher NO x storage capacity (NSC) over the whole temperature range of 100–400°C than the corresponding Pt/BaO/Al 2 O 3 -np samples containing the same BaO loading, giving the maximum NSC value of 966.9 μmol/g cat at 400°C, 1.4 times higher than that of Pt/BaO/Al 2 O 3 -np. Higher catalytic performance of nanorod-supported NSR samples was also observed during lean-rich cyclic conditions (90 sec vs. 5 sec), giving more than 98% NO x conversion at 300–450°C over the Pt/BaO/Al 2 O 3 -nr sample with 15% BaO loading. To reveal this dependence on the shape of the support during the NSR process, a series of characterization techniques including the Brunauer–Emmett–Teller (BET) method, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), H 2 temperature programmed reduction (H 2 -TPR), and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) were also conducted. It was found that intimate contact of Ba–Al and Ba–Pt sites was achieved over the Pt/BaO/Al 2 O 3 surface when using Al 2 O 3 -nr as a support. This strong interaction among the multi-components of Pt/BaO/Al 2 O 3 -nr thus triggered the formation of surface nitrite and nitrate during the lean period, and also accelerated the reverse spillover of ad-NO x species onto the Pt surface, enhancing their reduction and leading to high NSR performance.
研究领域:
催化化学
·
环境催化
·
材料科学
·
能源与环境工程
·
多相催化
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Xingyu Lin,Hongsheng Lu,Ruoxin Zhang,Ziteng Yang,Yingjiang Chen,Baiwen Huang
CO 2 flooding offers dual benefits by enhancing oil recovery and facilitating CO 2 storage. However, reservoir heterogeneity and clay swelling can significantly limit CO 2 storage capacity. Here, a novel strategy for in-situ formation of particle profile control agent and clay swelling inhibitor was established by CO 2 -responsive ionic liquids (ILs). Two fatty acid (FA)-based ILs were synthesized by reacting N, N -dimethylcyclohexylamine (DMCHA) with myristic acid (C14) and palmitic acid (C16). After CO 2 injection, FA was precipitated again as a particle profile control agent with a particle size exceeding 10.65 μm, while the protonated DMCHA in the remaining liquid phase serves as a clay swelling inhibitor. Notably, the precipitation of FA within the core increases the CO 2 storage capacity by 1.96 times. This innovative approach holds great promise for enhancing the efficiency and sustainability of CO 2 injection, benefiting both the petroleum industry and environmental protection.
研究领域:
石油工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED ENERGY
·
2024
·
IF 10.1
Yaning Kong,Honglin Yu,Mengqi Liu,Guodong Zhang,Fei Wang
Hydrate was considered to be the next generation hydrogen storage material , and hydrate-based hydrogen storage (HBHS) would play an important role in future hydrogen economy, but sluggish hydrate formation kinetics presents huge technological challenge for its application. Herein, a nano promoter of -SO 3 − @PSNS was prepared by soap-free emulsion polymerization , and a dual kinetic promoter system (L-methionine/-SO 3 − @PSNS) was applied to enhance the formation kinetics of mixed H 2 /DIOX hydrate. At a moderate condition (12 MPa and 274.15 K), hydration efficiency under a driving force of 2.1 MPa is significantly enhanced by the synergy of the dual kinetic promoters, hydrate induction time reduces from 443.2 ± 209.73 min to 24.7 ± 17.16 min, while hydrate growth rate increases by 43.75%, and hydrogen storage capacity is up to 0.473 ± 0.041 wt% that increases by 62.8%. At a more moderate condition (10 MPa and 274.15 K) with an extremely low driving force of 0.1 MPa, enhanced hydrate formation was obtained in a composite promotion system of the dual kinetic promoters and dual thermodynamic promoters (THF/DIOX), which also performs exceptionally in term of recycling. The presence of a small amount (0.35 mol%) of THF reduces the induction time by 93.5%, and hydrate growth rate increases by 130.18%, while satisfactory hydrogen storage capacity (0.346 ± 0.017 g/g) is still remained in mixed H 2 /DIOX/THF hydrate, the structure of which was confirmed by Raman spectrum . This work presents an effect approach on enhancing the formation kinetics of H 2 -contained hydrate under low driving force, and this finding provides important insight for HBHS.
研究领域:
物理化学
·
能源材料
·
气体储存
·
化学工程
·
纳米材料科学
·
分子模拟
·
可持续能源
✓ 已验证
DOI
高影响因子
Journal of Natural Gas Science and Engineering
·
2021
·
IF 4.965
Xuejian Liu,Quan Cao,Dongyan Xu,Shengjun Luo,Rongbo Guo
The maximum methane storage capacity (MSC) is of critical importance of methane hydrate to store methane. This paper reports the effects of vesicle solutions, formed through combination of carboxylate surfactants with cationic quaternary ammonium salt including hydroxypropyl trimethyl ammonium chloride chitosan (HACC) or dodecyl trimethyl ammonium chloride (DTAC), on the formation of methane hydrate. It was found that vesicles could raise the maximum MSC of hydrate by about 10 (V/V, the volume of methane stored by one volume of hydrate) at appropriate anion and cation concentrations. For example, at 800 ppm (parts per million) of sodium laurate (SL) and 600 ppm of HACC concentrations, the formed vesicles could elevate the maximum capacity to 151 V/V, 5.3% higher than that of sodium laurate alone. The vesicles formed could increase the maximum MSC, from 136 V/V to 147 V/V by sodium oleate (SO) and HACC, 145 V/V to 153 V/V by sodium decanoate (SD) and HACC and 137 V/V to 149 V/V by SO and DTAC. The reason for the enhancement is that the large hydrophobic space of the vesicles could solubilize methane molecules and facilitate them to contact with water molecules.
研究领域:
化学
·
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）