JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2022
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IF 6.76
Yachun Ren,Yueyang Xu,Erjian Huang,Peng Zhang,Yongping Zeng
Adsorption desulfurization is a very effective method to remove thiophenic compounds from fuels. The metal–organic frameworks (MOFs) have emerged as a new type of desulfurization adsorbents because of their porous nature and large specific surface area. In this study, Cu 2+ was covalently introduced into the UiO-66 framework at the defective sites by the solvothermal method. Further, the π-complexation adsorbent UiO-66-Cu(I) containing Cu + for adsorption desulfurization was synthesized by the methanol vapor-induced reduction. The adsorption performance was tested for the removal of thiophene from the model fuels with different sulfur concentrations. In comparison with the pristine UiO-66, the adsorbent UiO-66-Cu(I) has a higher adsorption capacity for thiophene, reaching 14.8 mg S/g. The competitive adsorption results indicated that UiO-66-Cu(I) has good selectivity for thiophene in the presence of aromatic compounds. From the recycling experiments, this adsorption still has the 86 % of the initial capacity after four cycles, indicating that the adsorbent has a good recycling performance.
研究领域:
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
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2023
·
IF 3.9
Xinwei Mu,Liuxing She,Zaikun Wu,Lidan Deng,Jian kong,Tielin Wang,Yuanhang Qin,Yin Zheng
The SBA-15 molecular sieve carrier with large specific surface area and pore volume, high temperature resistance and acid and alkali resistance was successfully synthesized by the method of hydrothermal synthesis . Then, ionic liquid is loaded on the surface and pores of the carrier by the impregnation method, so that it can be combined with the acid-base COS, thereby enhancing the adsorption effect and adsorption selectivity. Effects of three ionic liquids: 1-ethyl-3-methylimidazolium glycinate, 1-butyl-3-methylimidazolium glycinate and 1–(2-Aminoethyl)3-methylimidazolium bromide on the COS adsorption properties were discussed at different adsorption temperatures and loading concentrations. Among these mesoporous molecular sieves immobilized ionic liquids, the result from COS adsorption shows that the specific surface area of SBA-15 molecular sieve impregnated with 0.9 g·mL −1 [C 2 mim][Gly] (SBA-15-C 2 9.0) decreased from 902 m 2 ·g −1 to SBA-15–27 m 2 ·g −1 . And its COS breakthrough adsorption capacity can reach 11.38 mg·g −1 . It can concluded that [C 2 mim][Gly] is helpful to increase the adsorption capacity.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Atmospheric Pollution Research
·
2018
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IF 2.152
Xiao Yu,Jinliang Hao,Zhicheng Xi,Taiyang Liu,Ying Lin,Bin Xu
Three amine-modified Merrifield resins (AMMRs) were synthesized with ethane diamine, methylamine and dimethylamine to assess the impact of amine group on SO 2 adsorption under low SO 2 concentration. The dimethylamine-modified Merrifield resin (DMAMR) grafting with tertiary amine groups showed the greatest SO 2 adsorption compared with ethane diamine-modified Merrifield resin (EDAMR) and methylamine-modified Merrifield resin (MAMR). Different amine groups had different reaction mechanisms with SO 2 . It was much easier for SO 2 to form noncovalent charge transfer complex with tertiary amine group than the zwitterion and ion/counterion products with primary and secondary amine groups under dry condition. The noncovalent charge transfer complex had a relatively weaker thermostability than the zwitterion and ion/counterion products. As the temperature increased from 25 °C to 75 °C, the SO 2 adsorption capacity on DMAMR decreased by 78.92%, which was much higher than that of EDAMR and MAMR (63.77% and 63.41% respectively). As SO 2 concentration increased from 40 ppm to 100 ppm, significant increase (∼100%) in SO 2 adsorption capacity was observed. Lower SO 2 flow rate led to a more sufficient reaction between SO 2 and amine groups, resulting the increase in SO 2 adsorption capacities. Water vapor enhanced the SO 2 adsorption performance of AMMRs significantly due to the formation of salt. However, it was more difficult for tertiary amine group to react with SO 2 in the presence of water due to its relatively weaker basicity . DMAMR showed a greater regeneration performance than EDAMR and MAMR under dry and humid condition.
研究领域:
环境科学
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化学工程
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Qiang Le,Zhilin Cheng
As the adsorption technique was concerned, the facile, intact and low-cost separation process of adsorbents was desirable to the prospective feasible application. In present work, the nano-Ag 2 O particles were encapsulated in the hollow nanostructure of halloysites (HNTs) with the aid of CTAB-stabilized HNTs micelle by the space confinement method, and then the nano-Ag 2 O@HNTs nanocomposite was assembled in PVP/PAN electrospinning nanofiber membrane (NFM), and finally PVP template was removed through etching method, so as to access the hierarchical-porous structure. The structure and composition of nano-Ag 2 O@HNTs/PAN NFM were resolved by a series of characterizations. The nano-Ag 2 O@HNTs/PAN NFM not only was of abundant multi-pore structure with larger specific surface area of 23.484 m 2 /g and higher pore volume of 0.111 mL/g, but also exhibited excellent mechanical performance, of which the tensile strength and Young's modulus were up to 6.1 MPa and 75.9 MPa, respectively. Thanks to the existence of the exclusive pore structure and nano-Ag 2 O, the nano-Ag 2 O@HNTs/PAN NFM showed better adsorption desulfurization performance in the simulated thiophene (TH) oil, of which the breakthrough and saturated adsorption capacity were as high as 35.269 mg/g and 54.481 mg/g, respectively. Ultimately, the adsorption mechanism of TH molecules on the nano-Ag 2 O@HNTs/PAN NFM could be taken into account the synergistic effect of the porous diffusion , interface adsorption and active site adsorption.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
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IF 3.573
Linghui Yin,Min Hu,Dongyan Li,Jiahao Chen,Kai Yuan,Yishui Liu,Zhaoxiang Zhong,Weihong Xing
A multifunctional air filtration membrane is urgently required for high efficiency removal of particulate matter (PM) and capture of airborne toxic gases (SO2, NOx, VOCs, etc.). Zeolite imidazole frameworks (ZIFs), as a subclass of metal–organic frameworks (MOFs), hold promise for poisonous pollutant capture due to their excellent adsorption performance and high thermal and chemical stability. Here, a facile strategy is demonstrated to synthesize a multifunctional air filtration membrane through in situ growth of ZIF-67 nanoparticles on a flexible silica nanofiber membrane (ZIF-67@SiO2 NFM), which significantly improved the contact area of the membrane with SO2 and PM. When it underwent a standard PM removal test, the prepared ZIF-67@SiO2 NFM showed the highest PM2.5 removal efficiency of 100% at a relatively low pressure drop of 335 Pa with the impregnation time being 24 h. At the same time, due to the load of ZIF-67, the SO2 adsorption capacity up to 1013 mg/g could be realized in the obtained membrane when exposed to a SO2/N2 mixed flow with a humidity of 55%. Furthermore, during the incense smoke experiment, the PM2.5 filtering efficiency of the prepared ZIF-67@SiO2 membrane could reach 98.9% under an initial concentration of 1000 μg·m–3. This work proposes a simple and practical strategy to not only prepare a high-performance multifunctional nanofiber membrane but also achieve the capture of SO2 and PM with high efficiency.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2025
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IF 6.3
Kai Wang,Bo Zhang,Jianguang Gao,Bin Liu,Lanxia Hu,Wensheng Ning,Wanjin Yu
Tetraethoxysilane (TEOS) was easily hybridized with dopamine to prepare a series of SiO₂@dopamine (SiO₂@DA-n, where n represents the molar ratio of TEOS to DA in reaction precursors) hybrid aerogels using sol-gel method at room temperature and drying under atmospheric pressure, where the preparation process is relatively simple, and dopamine (DA) can be obtained from various biomaterials having good biocompatibility and renewability. All SiO₂@DA-n hybrid aerogels exhibited the markedly greater adsorption uptakes for thiophene compared with the pure SiO₂ aerogel, among them, the SiO₂@DA-50 conducted the best, having a breakthrough sorption uptake for thiophene of 7.89 mg S/g ads . Moreover, SiO₂@DA-50 had a good resisting ability for competitive adsorption of aromatic hydrocarbons, whose breakthrough sorption uptake for thiophene could be kept to 6.05 mg S/g ads , in the presence of 20 wt% benzene in the model gasoline. The atmospheric pressure heat treatment regeneration method could recover 100% of the breakthrough adsorption uptake for thiophene of spent SiO₂@DA-50. The case is attributed to that the -NH 2 groups and benzene ring on the surface of SiO₂@DA-n hybrid aerogels could act as the adsorption active centers of hydrogen bonding and π-π stacking for thiophenic compounds, respectively. SiO₂@DA-50 hybrid aerogels is a promising desulfurization adsorbent.
研究领域:
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
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Yuqi Yang,Xiandong Hao,Zhongxiao Sun,Yuan Chen,Zhiyong Xu,Wenbo Zhao
A series of novel porous metal oxides (MO, M = Mg, Ca, Ba, Mn and Zn) adsorbents were synthesized through simple thermal treatment of the corresponding metal sulfite for the remotion of sulfur dioxide (SO 2 ). The obtained MO adsorbents were characterized by various techniques including scanning electron microscopy (SEM), thermal gravimetric analyzer (TGA), X-ray diffraction (XRD) and nitrogen adsorption studies. The results show that the SO 2 adsorption capacity of manganese oxide (MnO) is much higher than that of other MO. And due to its highly dispersed and large specific surface area, especially its well-developed pore structure, equimolar adsorption of SO 2 can be achieved for the first time among similar SO 2 adsorbents. In addition, different sources of MnO were explored and it was found that the MnO obtained from the decomposition of MnSO 3 had the highest SO 2 adsorption capacity. Adsorption kinetic studies show that the reaction between MnO and SO 2 conforms to the pseudo-second-order kinetic equation. Furthermore, it was found through seven-cycle experiments that the adsorption amount tended to stabilize in each of the following cycles, except for the first high temperature, which led to changes in the adsorbent and a decrease in cycling performance. This strategy has three advantages: one-step preparation at low temperatures, equimolar adsorption of SO 2 as well as good reusability and selectivity.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Xiuxuan Fang,Jiaying Zou,Xichen Mi,Na Ma,Wei Dai
A single metal–organic framework (MOF) exhibits some drawbacks in deep adsorptive desulfurization such as insufficient functional active sites, water instability, low surface area, etc. Herein, a dual-amino-functionalized (ZIF-8-NH2)-PVP-(Cu-BTC-NH2) core–shell dual MOF adsorbent was first synthesized by the hydrothermal growth method. The adsorption performance of thiophene sulfur (ThS) is systematically investigated and evaluated at mild temperatures through batch tests. The (ZIF-8-NH2)-PVP-(Cu-BTC-NH2) exhibits good adsorption ability toward ThS, which is attributed to the associative effects of dual MOFs with structure features such as hydrogen bond, open metal active sites, suitable pore sizes and π–π conjugation, etc. Meanwhile, the (ZIF-8-NH2)-PVP-(Cu-BTC-NH2) embedded 25 wt % water still remains crystal intact and good adsorption desulfurization performance, which is attributed to the NH2– functional groups. After five recycles, more than 90% ThS uptake onto (ZIF-8-NH2)-PVP-(Cu-BTC-NH2) could be recovered, exhibiting good reuse performance. This study presents a new strategy for grafting MOF-on-MOF with specific functional groups to improve the abilities of desulfurization and water resistance.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
·
IF 4.939
Zhonghui Zhang,Changlei Qin,Zhiliang Ou,Jingyu Ran
H 2 S is a kind of common impurity produced during the gasification of biomass, and it will poison the catalysts used in biomass tar steam reforming , leading to a rapid degradation on the catalytic performance. The purpose of this work is to investigate the characteristics of biomass tar steam reforming using Ni/perovskite catalysts with the presence of H 2 S. Results show that H 2 S could significantly reduce catalytic activity due to the adsorption of sulfur on Ni surface , and Ni/perovskite catalysts are less susceptible to this poisoning in comparison to the Ni-catalyst loaded on γ-Al 2 O 3 . To understand the mechanism, fresh and spent catalysts were characterized using various techniques of XRD , SEM-EDS, XPS and TPO . It is proved that the lattice oxygen in perovskite could transform into surface species, inhibit the adsorption of sulfur and thus benefit to the reactivity of catalysts during biomass tar steam reforming.
研究领域:
化学工程
·
能源科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
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IF 8.456
Yan Zhang,Peixin Zhang,Weikang Yu,Jinghan Zhang,Jiejing Huang,Jun Wang,Mai Xu,Qiang Deng,Zheling Zeng,Shuguang Deng
It is very challenging to achieve efficient and deep desulfurization, especially in flue gases with an extremely low SO2 concentration. Herein, we report a microporous metal–organic framework (ELM-12) with specific polar sites and proper pore size for the highly efficient SO2 removal from flue gas and other SO2-containing gases. A high SO2 capacity of 61.2 cm3·g–1 combined with exceptionally outstanding selectivity of SO2/CO2 (30), SO2/CH4 (871), and SO2/N2 (4064) under ambient conditions (i.e., 10:90 mixture at 298 K and 1 bar) was achieved. Notably, the SO2/N2 selectivity is unprecedented among ever reported values of porous materials. Moreover, the dispersion-corrected density functional theory calculations illustrated the superior SO2 capture ability and selectivity arise from the high-density SO2 binding sites of the CF3SO3– group in the pore cavity (Sδ+···Oδ− interactions) and aromatic linkers in the pore walls (Hδ+···Oδ− interactions). Dynamic breakthrough experiments confirm the regeneration stability and excellent separation performance. Furthermore, ELM-12 is also stable after exposure to SO2, water vapor, and organic solvents.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF RARE EARTHS
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2014
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IF 1.342
Xiang LIU,Jingyan WANG,Qingyuan LI,Sai JIANG,Tianhao ZHANG,Shengfu JI
The rare earth metal-organic frameworks (Ln-MOFs) materials, Ln(BTC)(H 2 O)·(DMF), were synthesized using the rare earth metal (Ln=Sm, Eu, Tb, Y) and 1,3,5-trimesic acid (BTC) as a metal ion center and ligand, respectively. X-ray diffraction (XRD) and infrared spectroscopy (FT-IR) were employed to characterize the Ln-MOFs structural features. The property of adsorption desulfurization of Ln-MOFs materials was evaluated with thiophene/n-octane as model oil. The results showed that Ln-MOFs with rare earth metals Sm, Eu, Tb and Y had perfect crystalline and good adsorption desulfurization ability. Y(BTC)(H 2 O)·(DMF) material had a comparatively better activity for the adsorption desulfurization with desulfurization rate up to 80.7% and the sulfur adsorption capacity was found 30.7 mgS/g(Y-MOFs). The Ln-MOFs materials had excellent reusability.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Shaohe Wang,Jiansong Ma,Yingrong Ye,Sen Chen,Jianwen Tian,Huiping Chen,Hailong Peng,Jun Du
Solid-supported materials are extensively utilized for SO 2 capture. Polytertiary amine compounds, which are abundant in tertiary amine groups, efficiently capture SO 2 . In this study, we propose the loading of methylated polyethylenimide (mPEI), which is rich in tertiary amine groups, into chitin-derived carbon microspheres (NCMs), which have a robust pore structure and large surface area. The produced adsorbent (mPEI@NCMs) showed good performance for capturing SO 2 . Further, the adsorption capacity of mPEI@NCMs for SO 2 at 25 °C and 1 bar was 12.23–18.12 mmol/g, whereas at 25 °C and 0.01 bar, it was 4.58–6.96 mmol/g. The mPEI@NCMs sample showed good selectivity for adsorbing SO 2 from mixtures containing N 2 and CO 2 . Furthermore, mPEI@NCMs showed a good reversible adsorption capacity for SO 2 .
研究领域:
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）