RSC Advances
·
2021
·Vol. 11
·期 46
·28863-28875
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IF 3.361
Yu Qin,Li Xu,Liying Liu,Xiaoyu Deng,Yucheng Gao,Zhongwei Ding
A novel gas separation approach is proposed in this work by combining an amine-based solid adsorbent with a zeolitic imidazolate framework-8 (ZIF-8) membrane. This was achieved by incorporating the amine-based solid adsorbent during the fabrication of the ZIF-8 membrane on a macroporous substrate. An amine-based solid adsorbent was prepared using porous ZIF-8-3-isocyanatopropyltrimethoxysilane (IPTMS) and N-[(3-trimethoxysilyl)propyl]diethylenetriamine (3N-APS) amine compounds. The as-prepared porous amine-based solid adsorbent (denoted as ZIF-8-IPTMS-3N-APS) possessed excellent adsorptive CO2/N2 and CO2/CH4 separation performances. As the adsorbent needs to be regenerated, this could indicate that the CO2 adsorption separation process cannot be continuously operated. In this work, an amine-based solid adsorbent was applied during the preparation of the ZIF-8 membranes owing to the following reasons: (i) gas separation by the membrane can be operated continuously; (ii) the amino group provides a heterogeneous nucleation site for ZIF-8 to grow; and (iii) the reparation of surface defects on the macroporous substrate can be performed prior to the growth of the ZIF-8 membrane. Herein, the ZIF-8 membrane was successfully fabricated, and it possessed excellent CO2/CH4, CO2/N2, and H2/CH4 separation performances. The 0.6 μm ultrathin ZIF-8 membrane demonstrated a high CO2 permeance of 4.75 × 10−6 mol m−2 s−1 Pa−1 at 35 °C and 0.1 MPa, and ideal CO2/N2 and CO2/CH4 selectivities of 4.67 and 6.02, respectively. Furthermore, at 35 °C and 0.1 MPa, the ideal H2/CH4 selectivity of the ZIF-8 membrane reached 31.2, and a significantly high H2 permeance of 2.45 × 10−5 mol m−2 s−1 Pa−1.
研究领域:
材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2017
·
IF 6.035
Xingyu Wu,Wei Liu,Hong Wu,Xue Zong,Leixin Yang,Yingzhen Wu,Yanxiong Ren,Chengyou Shi,Shaofei Wang,Zhongyi Jiang
In this study, novel kinds of MMMs were fabricated by incorporating ZIF-67 nanoparticles into polymers of intrinsic microporosity (PIM-1). ZIF-67 (Co substituted ZIF-8) displays stiffer Co-N bond as compared with the Zn-N bond in ZIF-8, which might led to the slightly smaller effective pore aperture of ZIF-67. Good compatibility between ZIF-67 nanoparticles and PIM-1 matrix rendered ideal interfacial morphology. The intrinsic separation performance of ZIF-67 was estimated from our experimental separation results based on the Maxwell model. The calculation demonstrated its superior CO 2 /CH 4 selectivity of 45, which is twice compared with that of ZIF-8, supporting the high molecular sieving efficiency of PIM-1/ZIF-67 MMMs. Particularly, the CO 2 and H 2 permeability increased by 15.1% and 59.6% for PIM-1 membrane with 20 wt% ZIF-67 loading, meanwhile CO 2 /CH 4 and H 2 /CH 4 selectivity increased by 34.4% and 86.96%, respectively. The strategy of incorporating highly selective ZIFs into polymers of intrinsic microporosity may have promising potential in fabricating high performance membranes for efficient gas separation.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2016
·
IF 1.207
Xiaoqing Wang,Libo Li,Jiangfeng Yang,Jinping Li
Two isomeric metal–organic frameworks (MOFs) with 2-dimensional (2D) and 3-dimensional (3D) topologies both comprised of Cu(II) and OTf (OTf = trifluoromethanesulfonate) ions were synthesized and characterized. The CO 2 , CH 4 and N 2 adsorption properties of the two isomeric MOFs were investigated from 263 K to 298 K at 0.1 MPa. The results showed that the 2D MOF exhibited a higher selectivity for CO 2 from CO 2 /CH 4 and CH 4 from CH 4 /N 2 compared to the 3D MOF, even though it possessed a lower surface area and pore volume. The higher adsorption heats of gases on the 2D MOF inferred the strong adsorption potential energy in the layered MOFs. Dynamic separation experiments using CO 2 /CH 4 and CH 4 /N 2 mixtures on the two MOFs proved that the 2D MOF had a longer elution time than the 3D MOF as well as better separation abilities.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
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2022
·
IF 5.436
Yimeng Zhou,Qianjin Ye,Xiangli Shi,Qiong Zhang,Qi Song,Changjian Zhou,Di Li,Deli Jiang
Due to the multiple electron and proton transfer processes involved, the photogenerated charges are easily recombined during the photocatalytic reduction of CO2, making the generation of the eight-electron product CH4 kinetically more difficult. Herein, Ni3B nanoparticles modulated by p-block element were combined with TiO2 nanosheets to construct a novel Schottky junction photocatalyst (Ni3B/TiO2) for the selective photocatalytic conversion of CO2 to CH4. The formed Ni3B/TiO2 photocatalyst with Schottky junction ensures a transfer pathway of photogenerated electrons from TiO2 to Ni3B, which facilitates the accumulation of electrons on the surface of Ni3B and subsequently improves the activity of photocatalytic CO2 reduction to CH4. The optimized Ni3B/TiO2 Schottky junction shows an improved CH4 yield of 30.03 μmol g–1 h–1, which was much higher than those of TiO2 (1.62 μmol g–1 h–1), NiO/TiO2 (2.44 μmol g–1 h–1), and Ni/TiO2 (4.3 μmol g–1 h–1). This work demonstrated that the introduction of p-block elements can alleviate the scaling relationship effect of pure metal cocatalysts to a certain extent, and the modified Ni3B can be used as a promising new cocatalyst to effectively improve the selective photocatalytic of CO2 to CH4.
研究领域:
材料科学
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环境科学
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化学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
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2022
·Vol. 12
·期 21
·12997-13002
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IF 4.036
Yue Hou,Cheng-Jie Jiang,Ying Wang,Jing-Wei Zhu,Jia-Xing Lu,Huan Wang
The construction of an efficient catalyst for electrocatalytic reduction of CO2 to high value-added fuels has received extensive attention. Herein, nitrogen-doped mesoporous carbon (NMC) was used to support CuSb to prepare a series of materials for electrocatalytic reduction of CO2 to CH4. The catalytic activity of the composites was significantly improved compared with that of Cu/NMC. In addition, the Cu content also influenced the activity of electrocatalytic CO2 reduction reaction. Among the materials used, the CuSb/NMC-2 (Cu: 5.9 wt%, Sb: 0.49 wt%) catalyst exhibited the best performance for electrocatalytic CO2 reduction, and the faradaic efficiency of CH4 reached 35%, and the total faradaic efficiency of C1–C2 products reached 67%.
研究领域:
材料科学
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电化学
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催化反应
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POROUS MATERIALS
·
2025
·
IF 3.2
Qian Yi,Jiang Qingqing,Xiang Shimeng,Lu Zhenhao,Xu Xiaowen,Yang Jing,Dai Guoliang,Song Ruifeng,Jiang Ji
Separating CO 2 and N 2 from CH 4 is crucial for energy production and environmental protection. This study showed the rapid synthesis of CHA zeolites with different morphologies using an in situ growth method, without the assistance of organic structure directing agents (OSDA) or fluoride media. The crystallization behavior of CHA zeolites was studied in terms of synthesis gel composition (including water content, silicon and aluminum content, alkalinity and Sr 2+ concentration), synthesis temperature and duration. The results suggested that pure phase CHA zeolite nano-aggregates could be synthesized with broad precursor conditions at 150 °C for only 4 h. Then, K-CHA zeolite was ion-exchanged to Na-CHA and Ca-CHA and the adsorption properties of CHA zeolites with different morphologies and ions were studied. The results suggested that Na-CHA exhibited highest CH 4 , CO 2 and N 2 adsorption capacity and showed higher ideal selectivity for N 2 /H 2 ; Although Ca-CHA zeolites exhibited relative lower CO 2 and CH 4 adsorption capacity, it exhibited the highest ideal selectivity for CO 2 /CH 4 ; Simultaneously, K-CHA zeolite exhibited high CH 4 adsorption capacity and high adsorption separation ability of CH 4 /N 2 . Furthermore, breakthrough experiments have confirmed the practical feasibility of separating CO 2 from CH 4 .
研究领域:
材料科学
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化学工程
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吸附与分离
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分子筛合成
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气体分离
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
·
IF 10.53
Peipei Zhou,Ting Wu,Zhen Sun,Yinuo Liu,Xinwei Chen,Meihua Zhu,Fei Zhang,Na Hu,Yuqin Li,Tian Gui,Xiangshu Chen,Hidetoshi Kita
Here, high-silica SSZ-13 membranes were prepared on macroporous supports by regulating sodium sources (NaOH, NaCl, Na 2 SO 4 and sodium-free) under fluoride and aluminum free gel. A pure phase and high gas permeation SSZ-13 membrane with oval-shaped crystals on the membrane surface was obtained by NaCl. It suggests that alkali metal sodium ion promoted crystal crystallization. The influence of Na 2 O (2NaCl)/SiO 2 ratio (from 0.025 to 0.2) on the crystallization process of zeolite membranes was investigated in detail by XRD , SEM and gas permeation tests. The content of NaCl hardly affected the structure of SSZ-13 but could affect the morphology and size of the crystals. The best membrane (NaCl/SiO 2 = 0.2) had a mixed CO 2 and N 2 gas permeance of 5.4 × 10 −7 mol/(m 2 s Pa) and 5.2 × 10 −8 mol/(m 2 s Pa), along with the CO 2 /CH 4 and N 2 /CH 4 selectivity of 155 and 12.3, respectively. The effects of pressure drop, temperature and feed concentration on membrane separation performance were explored. In addition, the obtained SSZ-13 membrane exhibited the hydrothermal stability in the humid N 2 /CH 4 mixture under 298K, indicating the application prospects in natural gas separation.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Shahid Hussain,Haifeng Dong,Yanqiang Zhang,Guoxiong Zhan,Shaojuan Zeng,Huifang Duan,Xiangping Zhang
The efficient capture of carbon dioxide (CO2) has industrial, economic, and environmental significance. Here, CO2 capture performance in terms of CO2/CH4 selectivity for the zeolitic imidazolate framework (ZIF-8) is enhanced by impregnation of 1-n-butyl-3-methylimidazolium dicyanide [BMIM][DCA]. The preparation of ionic liquids (ILs)/ZIF-8 composites, their comprehensive characterization, and the impact of IL impregnation are all investigated. The crystal structure and morphology of ZIF-8 remained intact even after the impregnation of ILs, according to X-ray diffraction and scanning electron microscopy studies. The infrared spectroscopy known as Fourier transform infrared spectroscopy determines the interaction between ILs and ZIF-8 in the composite. The isotherm fitting was also performed by dual site Langmuir models, which showed good agreement with the experimental results. The CO2/CH4 selectivity results demonstrated that the ideal selectivity for the IL-impregnated ZIF-8 composite has five times higher selectivity than pristine ZIF-8 at 0.05 bar which is the highest reported selectivity. The normalized selectivity of this type of IL/ZIF-8 composite is also higher. This study suggested that the IL/MOF composite with a tunable structure have a strong potential for enhanced acid gas separation performance to meet the environmental challenges.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2017
·
IF 6.035
Ning Zhang,Dongdong Peng,Hong Wu,Yanxiong Ren,Leixin Yang,Xingyu Wu,Yingzhen Wu,Zihan Qu,Zhongyi Jiang,Xingzhong Cao
For high-performance hybrid membranes, it is crucial to design multi-functional filler to rationally manipulate the structure-property relationship. In this study, a novel kind of hybrid membrane was fabricated by incorporating zinc ion loaded sulfonated pitch (SP-Zn 2+ ) nanofillers into poly (ether-block-amide) (Pebax) matrix for CO 2 /CH 4 separation. Sulfonated pitch (SP) with high sulfonate content was functionalized by zinc ion (Zn 2+ ) via complexation reaction to synthesize SP-Zn 2+ nanofillers with high Zn 2+ loading. Mixed gas separation performances of membranes with different SP-Zn 2+ loading were conducted. Meanwhile, the effect of operating pressure on separation performance and long-term operation stability were investigated. The hybrid membranes displayed significantly enhanced permeability and CO 2 /CH 4 selectivity. First, the hydrophilic sulfonate group in SP had good compatibility with Pebax matrix and effectively suppressed interfacial defects. Second, zinc ions and sulfonate group could form zinc-sulfonate complex network. The sulfonated moiety afforded strong affinity toward CO 2 due to multiple interactions whereas the Zn 2+ moiety afforded a transport highway for CO 2 . Third, the incorporation of SP-Zn 2+ nanofillers could disturb the Pebax chain packing and optimize the free volume characteristics. Particularly, Pebax/SP-Zn 2+ (2) membrane exhibited an increment of 104% and 70.2% in CO 2 permeability and CO 2 /CH 4 selectivity respectively, much higher than that of Pebax membrane.
研究领域:
材料科学
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化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Yaxue Zhang,Shuanshi Fan,Yanhong Wang,Xuemei Lang,Gang Li
Gas hydrate is considered to be a highly efficient natural gas storage technology, which has a broad outlook and great potential. In this work, lignocellulose fiber from paper was chosen as a carrier for enhanced hydrate formation based on availability and universality, and the experiments of lignocellulose fiber-promoted hydrate were carried out at about 275.2 K and 6 MPa by a novel experimental apparatus including 6 parallel high-pressure gas storage reactors. When the mass ratio for water and paper ( R w) was saturated, the lignocellulose fiber in printed paper exhibited the highest CH 4 uptake, and its maximum CH 4 uptake reached 1.396 mmol/g when R w = 3.0. Capillary-driven water suction in lignocellulose fibers played a dominant role during hydrate formation. Besides, the synergistic effect of lignocellulose fibers and SDS on CH 4 hydrate formation was also studied. The induction time of CH 4 hydrate was minimized to less than 10 min, the time in 300 ppm SDS was only 0.65 min. The CH 4 uptake was 1.567 mmol/g, and max rate of CH 4 uptake was 0.152 mmol/g/min with 500 ppm SDS, which were 13.6 % and 3.75 times higher than that of without SDS respectively. It was attributed to the surface of the lignocellulose fibers providing nucleation sites for CH 4 hydrate formation, while SDS reduces the surface tension of water. This work is promised to provide a more flexible solution for hydrate storage and utilization.
研究领域:
能源科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2023
·
IF 3.8
Tongming Su,Jundong Meng,Ya Xiao,Liuyun Chen,Hongbing Ji,Zuzeng Qin
Photocatalytic CO 2 reduction to valuable product exhibit promising prospect for solving the energy crisis and the greenhouse effect. Herein, Co-Ti 3 C 2 T x /g-C 3 N 4 (Co-TC/CN) composite with enhanced photocatalytic performance for converting CO 2 to CO and CH 4 was constructed by electrostatic self-assembly method. The close contact interface between Co-Ti 3 C 2 T x and g-C 3 N 4 nanosheets can be used as fast transport channels of photogenerated electrons and effectively promote the separation of photogenerated electrons and holes, and the interface between the Co and Ti 3 C 2 T x might be the active sites for CO 2 adsorption and activation. The optimized Co-Ti 3 C 2 T x /g-C 3 N 4 composite exhibited the highest photocatalytic performance with the CO and CH 4 production of 55.04 μmol·g –1 and 2.29 μmol·g –1 , respectively, which were 7.5 times and 5.9 times than those of g-C 3 N 4 . Furthermore, the stability of g-C 3 N 4 was improved after coupling with Co-Ti 3 C 2 T x .
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Sulong Shi,Yuxi Zhang,Yue Pan,Xin Liu,Fuhong Zhang,Hongyuan Yang,Qingya Liu,Zhenyu Liu
Hydrogenation of calcium carbonate (CaCO 3 ) directly yields calcium oxide (CaO), carbon monoxide (CO) and methane (CH 4 ) with little dioxide ( CO 2 ) . It therefore is promising to retrofit the industries, such as the cement, refractory, calcium carbide and steel, that rely on CaCO 3 calcination for CaO but emit large amounts of CO 2 . To lower the hydrogenation temperature of CaCO 3 and to promote CH 4 production efficiency and selectivity this work investigates the catalytic effect of various nickel compounds on the CaCO 3 hydrogenation for CH 4 . Among the NiCO 3 , NiO, Ni 2 O 3 and Ni doped in CaCO 3 , NiCO 3 is the most active catalyst. It is hydrogenated to yield highly dispersed Ni in CaCO 3 at temperatures around 600 K, while the Ni catalyzes CaCO 3 hydrogenation for CH 4 at temperatures higher than 640 K, which are about 150 K lower than the non-catalytic CaCO 3 hydrogenation. The doping of 0.50% NiCO 3 converts 99.0% CaCO 3 to CH 4 . The catalytic CaCO 3 hydrogenation for CH 4 and CO can be modeled by the Shrinking core model (SCM) that shows activation energy ( E a ) of 110.0 kJ mol −1 for CH 4 production when 0.50% NiCO 3 is doped, which is lower than 211.9 kJ mol −1 for non-catalytic hydrogenation.
研究领域:
化学工程
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能源科学
✓ 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）