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
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气体储存
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化学工程
·
纳米材料科学
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分子模拟
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可持续能源
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2025
·
IF 4.2
Zhongtao Sun,Jielang Huang,Ling Zhou,Yi Zhang
The reverse water gas shift (RWGS) reaction is a critical and essential step in the CO2 hydrogenation of iron-based catalysts to produce high-value chemicals such as olefins and higher alcohols. Modification iron-based catalysts by promoter is a popular way in design efficient catalysts which not only can regulate the iron active species but also alter the CO2 adsorption and hydrogenation performance of the catalyst. Herein, a series of Na and Pd promoted 10Fe/SiO2 were prepared. 1Pd/2Na10Fe/SiO2 catalyst exhibited the highest CO2 conversion (13.2 %), the highest CO selectivity (99.7 %) and good catalyst stability. Combination of various characterization results, such as XPS, HRTEM, Mössbauer spectroscopy, CO/CO2-TPD, H2-TPD and in situ DRIFTS, it was found that the addition of Na promoter altered the reaction pathway from redox and associated pathway to only following an associative pathway, contributing to the high CO selectivity. Besides, when the content of Fe2+ species was similar, the associated pathway would be advantageous to high CO formation rate during RWGS reaction over iron-based catalysts. On the other hand, in the same reaction pathway, the content of Fe2+ species would determine the CO formation rate over iron-based catalysts during RWGS reaction.
研究领域:
催化化学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
KINETICS AND CATALYSIS
·
2024
·Vol. 65
·期 3
·251-260
·
IF 1.3
Yang Zhi,Luo Mingsheng,Liu Qinglong,Li Chenmeng,Wang Yatao,Li Hongjuan,Yao Lifei
Abstract The direct production of higher alcohols from syngas in a single step remains a great challenge. In this work, a series of K and Ni promoted Mo 2 C/Al 2 O 3 catalysts were prepared by impregnation method to enhance the selectivity of Mo 2 C-based catalysts for the one-step conversion of syngas to higher alcohols. The catalysts were continuously tested under the following conditions: 300°C, 3.0 MPa, velocity—11.50 \({\text{Lg}}_{{{\text{Mo}}}}^{{ - 1}}\) h –1 , H 2 /CO ratio of 2. The catalysts promoted with K and Ni demonstrated the highest total alcohol selectivity of 67.7%. Moreover, the selectivity for total C 2+ alcohols reached as high as 56%, with 37% being ethanol. X-ray diffraction (XRD), hydrogen temperature-programmed reduction (H 2 -TPR) and X-ray photoelectron spectroscopy (XPS) characterization data reveal that K can promote the crystallinity of β-Mo 2 C, lower the catalyst reduction temperature and increase the proportion of high-valent Mo on the catalyst surface. In addition, adding Ni as a promoter to the KMo 2 C/Al 2 O 3 catalyst can generate a synergistic effect to further enhance the catalytic activity and the selectivity of higher alcohols.
研究领域:
化学工程
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催化
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2017
·
IF 3.091
Hongxia Gao,Zeyang Wu,Helei Liu,Xiao Luo,Zhiwu Liang
The absorption/desorption performance of carbon dioxide (CO2) in aqueous 5 M monoethanolamine (MEA) solutions in the presence of various solution regeneration promoters was comprehensively investigated using a multiple rapid screening method. The promoters considered were N-methyldiethanolamine (MDEA), N,N-dimethylethanolamine (DMEA), N,N-diethylethanolamine (DEEA), 1-dimethylamino-2-propanol (1DMA2P), 1-diethylamino-2-propanol (1DEA2P), 3-dimethylamino-1-propanol (3DMA1P), 2-(dimethylamino)-2-methyl-1-propanol (2DMA2M1P), triethanolamine (TEA), 3-(dimethylamino)-1,2-propanediol (3DMA-1,2-PD), and 3-(diethylamino)-1,2-propanediol (3DEA-1,2-PD). The molar concentration of these promoters added into 5 M MEA was set to 1 mol/L. At the atmospheric pressure, the absorption and stripping experiments were carried out at 313.15 and 353.15 K, respectively. Especially, the CO2 partial pressure was controlled at constant 15 kPa for absorption experiments. In addition, the equilibrium solubility of CO2 was also determined in order to evaluate the driving force of each amine system. The results showed that the highest CO2 equilibrium solubility of 0.5548 mol CO2/mol amine was obtained by MEA/1DEA2P, whereas both the fastest absorption and regeneration rates were achieved for aqueous blended MEA/1DMA2P solution which made MEA/1DMA2P to exhibit the highest CO2 cyclic capacity of 1.6710 mol CO2/L.
研究领域:
化学工程
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环境科学
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能源技术
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物理化学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Xuejian Liu,Yan Li,Guang-Jin Chen,Dao-Yi Chen,Bo Sun,Zhenyuan Yin
CO2 capture and sequestration are broadly recognized as the most effective technology for reducing CO2 emissions and mitigating global climate change. In this regard, hydrate-based CO2 sequestration (HBCS) has been proposed as an effective method for long-term safe and stable CO2 sequestration. It is a promising technology for reducing the concentration of CO2 in the atmosphere and achieving carbon neutrality. However, one major challenge related to HBCS technology is the lack of understanding of how to improve the formation kinetics of CO2 hydrate effectively. Herein, in this study, we identified the synergistic promotion effect on CO2 hydrate formation when a low-dose thermodynamic promoter (tetrahydrofuran, THF) is coupled with an environment-friendly kinetic promoter (l-methionine, l-Met). Based on the kinetic experiments and the morphological observation, 0.6 mol % THF coupled with 0.1 wt %l-Met yields the optimal CO2 gas uptake. In situ Raman spectra reveal the mechanism of the observed two-step growth behavior at the molecular level, where low-dose THF promotes the initial CO2-THF sII hydrate nucleation and growth in the solution and l-Met promotes the subsequent CO2 sI hydrate growth along the surface of the reactor. Our study unveils the underlying synergistic mechanism when thermodynamic and kinetic promoters are coupled for CO2 hydrate formation. The results provide guidance for the identification and use of novel bio-friendly thermodynamic and kinetic promoters and are beneficial to a series of sustainable hydrate-based technologies when fast CO2 formation is required.
研究领域:
化学工程
·
环境科学
·
材料科学
·
可持续能源
✓ 已验证
产品关联
DOI
高影响因子
Drug Delivery and Translational Research
·
2023
·
IF 5.4
Nan Longyi,Song Haoyuan,Wang Haijun,Mi Ru,Wang Xiaoxu,Fang Liang
The aim of this study was to design a tulobuterol (TUL) patch with good penetration behavior and mechanical properties. Particular attention was paid to the effect of transdermal permeation enhancers on the release process of metal ligand-based acrylic pressure-sensitive adhesive (AA-NAT/Fe 3+ ). The type and dosage of the enhancers were screened by in vitro transdermal penetration in rat skin. The optimized formulation was evaluated in a pharmacokinetic study in rats. Furthermore, the molecular mechanism by which Azone (AZ) improves the release rate of TUL from AA-NAT/Fe 3+ was investigated by FT-IR, shear strength test, rheological study, and molecular simulation. As a result, the optimized formula using AA-NAT/Fe 3+ showed better mechanical properties compared to commercial products. Meanwhile, the AUC 0-t and C max of the optimized patch were 1045 ± 89 ng/mL·h and 106.8 ± 28.5 ng/mL, respectively, which were not significantly different from those of the commercial product. In addition, AZ increased the mobility of the pressure-sensitive adhesive (PSA) rather than decreasing the drug-PSA interaction, which was the main factor in enhancing TUL release from the patch. In conclusion, a TUL transdermal drug delivery patch was successfully developed using metal-coordinated PSA, and a reference was provided for the design of metal-coordinated acrylic PSA for transdermal patch delivery applications. Graphical Abstract
研究领域:
药学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2020
·
IF 5.578
Xiu Chen,Haidong Li,Linzhou Zhang,Quan Shi,Suoqi Zhao,Chunming Xu
Molecular-level characterization of sulfur-containing compounds has attracted particular attention due to its relative high abundance and negative impact on the refining process. In this paper, a novel analytical method for selective ionization of sulfidic and/or isolated thiophenic compounds (thiophene rings that are not condensed with aromatic systems) and condensed thiophenic compounds (thiophene rings that are condensed with aromatic systems, DBE ≥ 6, DBE = number of rings plus double bonds to carbon) in petroleum samples was developed by using fluoroboric acid (HBF 4 ) as ionization promoter. Positive-ion electrospray ionization [(+) ESI] Fourier transform ion cyclotron resonance mass spectrometry was followed to characterize the molecular composition. Sulfidic and/or isolated thiophenic compounds were mainly ionized as protonated molecular ions ([M+H] + ), while condensed thiophenic compounds (DBE ≥ 6) were mainly ionized as molecular radical cations (M + ). The method was validated by various sulfur-containing model compounds and then applied to vacuum gas oil, crude oil and heavy oil samples. (+) ESI coupled with HBF 4 additive is a simple method for selective ionization of sulfides and thiophenes in high-sulfur-content petroleum samples and has the potential for the characterization of sulfides and thiophenes in other complex mixtures.
研究领域:
化学
·
能源科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Xiaochun Niu,Jinlin Zhong,Dongjun Lei,Haoyan Zhang,Weixing Wang
Water (H2O) is an ideal methane storage medium by forming methane hydrate (also known as “burning ice”) with a maximum gravimetric capacity of up to 154.9 mg g–1 for potential methane transportation. However, the formation rate of methane hydrate is very sluggish, which is the main obstacle for its potential commercial applications. Here we first demonstrate that an inorganic composite promoter (boric acid plus calcium hydroxide) is highly effective in promoting methane hydrate formation under static conditions with a gravimetric capacity of up to 131.8 mg g–1 which is very close to that of the organic surfactant sodium dodecyl sulfate (SDS, the benchmark promoter). We also show that employing inorganic alkalis to enhance the promoting effect of boric acid is a common strategy for methane hydrate formation. Furthermore, we propose that the excellent promoting effect of the inorganic composite promoters is due to the combined effect of boric acid, monoborate anion, and metal cation. Our work opens the door to a new era of highly effective inorganic composite promoter research and paves the way for hydrate-based methane (or natural gas) storage and transportation.
研究领域:
化学工程
·
能源科学
✓ 已验证
DOI
高影响因子
Catalysts
·
2025
·Vol. 15
·期 3
·250
·
IF 4
Jingjing Wang,Peixiang Shi,Jiahao Han,Yuhao Tian,Zhiqiang Yan,Pengcheng Luo,Hongyan Ban,Yanchun Li,Weijie Cai,Guanjing Lin,Zhiqiang Zhai,Congming Li
The hydrogenation of CO2to methanol over Cu-based catalysts is one of the attractive routes to reduce greenhouse gas emissions and generate high-value-added chemicals. Industrial CuZnAl catalysts possess some shortcomings, but various promoters can enhance the activity and durability of Cu-based catalysts for CO2hydrogenation. Herein, we systematically investigated the variations in the physicochemical properties of ternary CuZnM (M: Cr, Ce, Zr, Al) catalysts induced by different promoters, as well as their impact on CO2hydrogenation to methanol. The results demonstrate that the catalytic activity followed the order of CZCr > CZCe > CZZr > CZAl, with CZCr exhibiting the highest stability among them. Combined with XRD, SEM, TEM, H2-TPR, TPD, XPS, Raman findings and the experimental results, the smaller Cu particle size was conducive to increasing the CH3OH yield, and the lower Cu+/Cu0ratio exhibited better stability in CO2hydrogenation to methanol reaction. This approach offers theoretical insights and practical solutions for the industrial application of ternary Cu-based catalysts.
研究领域:
催化化学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Abubakar Yusuf,Yong Ren,Yun Liu,Li Shi,Zhiyu Xiao,Run Pan,Zheng Wang,Hainam Do,Jianrong Li,Jun He
The efficient treatment of methane emissions from natural gas-powered engines is necessary due to the high potency and global warming potential of methane. Promoters are often employed to enhance catalysts’ performance and stability for methane oxidation. It is therefore important to understand the impact of promoters on Pd activity, especially under practically relevant conditions. Here, we report the enhancement and inhibition effect of promoters (ZrO 2 , CeO 2 , and TiO 2 ) on the sulfur resistance and regeneration of alumina-supported Pd catalysts for complete methane oxidation in the presence and absence of moisture. The type of promoter employed and the presence of moisture influence the type of sulfur species formed on the alumina-supported Pd catalysts, as well as their catalytic performance and regeneration. Whereas ZrO 2 enhances both the activity and SO 2 resistance and enhances the regeneration of the poisoned catalysts under both dry and wet reaction conditions, more stable sulfate species are formed in the presence of CeO 2 and TiO 2 , inhibiting both the catalysts’ performance and regeneration. In addition, the presence of ZrO 2 protects the active Pd sites from progressive deactivation over sulfur poisoning and regeneration cycles. The results of this work provide insights into how promoters influence the activity, sulfur poisoning and regeneration of methane oxidation catalysts in the presence and absence of moisture, which have implications for the practical design of industrially relevant catalysts.
研究领域:
催化化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2020
·Vol. 37
·期 4
·623-632
·
IF 2.69
Yan Zhinan,Kang Yong,Li Dan,Liu Yu Chun
Hematite (α-Fe 2 O 3 ) is a promising alternative to the catalysts currently used due to its low cost, fairly good activity and environmentally friendly properties. In this study, α-Fe 2 O 3 /SiO 2 nanocatalysts promoted with cobalt and cerium (Co 3 O 4 -CeO 2 -α-Fe 2 O 3 /SiO 2 ) were prepared via wet co-impregnation method, and the effects of promoters on catalytic performances for SO 2 oxidation at different temperatures, SO 2 concentrations, cycle numbers, catalytic stability as well as catalyst charging were investigated. The results indicated that SO 2 conversion rose with the increasing of catalyst charging and SO 2 concentration. Also, the as-prepared catalyst had the maximum SO 2 conversion at the reaction temperature of 500 °C, excellent catalytic recyclability and activity stability. Its physicochemical and redox properties were characterized by XRD, BET, SEM, FT-IR and XPS. The results of XRD and FT-IR spectra confirmed that the formation of Ce 2 FeO 4 network in the Co-Ce co-doped catalysts proved the promoting effect of cerium on higher valence state of the active ingredient. The N2 adsorption/desorption results evidenced that cerium could increase the proportion of mesoporous, and the XPS spectra indicated that cobalt and cerium in the catalysts could increase the available oxygen (O β /O α ) for the redox reaction. Due to its excellent low onset temperature, fairly good activity and environmentally friendly properties, the as-prepared catalyst of Co 3 O 4 -CeO 2 -α-Fe 2 O 3 /SiO 2 appeared to be more efficient for the SO 2 conversion in a large concentration range.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Chen Chen,Haoyu Yuan,Xiaoming Wang,Yan Lin,Yan He,Fei Wang
Gas hydrate has been proposed as an effective medium for gas separation, desalination, gas storage and so on, yet the low reaction rate has been hindering the industrialization of hydrate-based technology . Hence various kinds of promoters, especially nano particles , have been introduced and investigated to increase the rate of hydrate formation. However, the recyclability of these promoters has not been given sufficient attention from an environmental friendly and economic point of view. In this study, a recyclable magnetic Fe 3 O 4 nanoparticle coated with SDS (SDS-coated Fe 3 O 4 ) was synthesized and successfully used for hydrate formation promotion as well as cycle experiments. The results showed that SDS-coated Fe 3 O 4 exhibited more efficient promotion for hydrate formation than bare Fe 3 O 4 in the studied concentration range. Especially, the induction time and reaction time can be significantly reduced to 77.6 ± 24.1 and 36 ± 3 min, respectively, and the methane storage capacity can be maintained up to 130 ± 5.9 v/v with the concentration of 20 g/L SDS-coated Fe 3 O 4 . Further comparison of bare Fe 3 O 4 and SDS-coated Fe 3 O 4 during cycle experiments showed that after 5 cycles, the methane storage capacity and reaction time in presence of SDS-coated Fe 3 O 4 can still be maintained as 119.5 ± 8 v/v and 110 ± 10 min, which were even better than the performance of bare Fe 3 O 4 just after two cycles. To sum up, SDS-coated Fe 3 O 4 can be recycled and reused many times for the hydrate formation, indicating that the SDS-coated Fe 3 O 4 has a potential to increase the recyclability and its economy for promoters in the hydrate-based technology.
研究领域:
化学工程
·
环境科学
·
材料科学
✓ 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）