JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Lei Lei,Yan Cheng,Changwei Chen,Mohammadreza Kosari,Zeyu Jiang,Chi He
Though the highest CO 2 capture capacity belongs to liquid amine-solutions, solid matters capable of CO 2 capture are also highly sought, providing that, they offer at least analogous CO 2 adsorption capacity and CO 2 /N 2 selectivity. Herein, a surprisingly high-performance Ni-based metal–organic framework for CO 2 adsorption, namely MOF-74(Ni), was synthesized by a facile condensation reflux approach. It was found that the structure and CO 2 adsorption isosteric heat of MOF-74(Ni) could tune upon varying the synthesis duration under various temperatures. The optimized MOF-74(Ni)-24-140 (synthesized at 140 °C for 24 h) displays outstanding CO 2 adsorption capacity of 8.29/6.61 mmol/g at 273/298 K under normal pressure of 1.0 bar, several times higher than previously reported MOF-74-Ni (2.0/2.1 times), UTSA-16 (1.5/1.6 times), and DA-CMP-1 (3.6/4.9 times) under similar conditions. The excellent CO 2 capture capacity is associated to the abundant adsorption sites (mainly arising from the cationic Ni 2+ ions) and narrow micropore channels (mainly arising from the cage structure of Ni 2+ ions coordinated with organic linkers). Offering a high CO 2 selectivity (CO 2 /N 2 = 49) and a well-tuned isosteric heat of CO 2 adsorption (27–52 kJ/mol) besides its decent CO 2 capture capacity, MOF-74(Ni) strongly stands out as an efficient and strong CO 2 capturing material with industrial scale applicability.
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DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Yufei Huang,Xiaowen Zhang,Xiao Luo,Hongxia Gao,Zain Ali Saleh Bairq,Paitoon Tontiwachwuthikul,Zhiwu Liang
The huge energy consumption of rich amine solution regeneration severely restricts the large-scale application and promotion of the CO2 capture process by the amine method. In order to reduce the operating energy consumption during the CO2 capture process using amines, especially the energy consumption of absorbent regeneration, zeolite β/SBA-15 (BS) has been synthesized in this work using the hydrothermal method with zeolite beta (β) as the silicon source; β was used to prepare the novel Zr@BS and Fe–Zr@BS catalysts for amine regeneration. Experiments for CO2 stripping were performed at 370.15 K using amine solvent [monoethanolamine (MEA)] with an initial CO2 loading of 0.50 mol CO2/mol amine. Additionally, all the materials were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, N2 adsorption–desorption experiment, ammonia temperature-programmed desorption, and pyridine adsorption infrared spectroscopy. Also, the catalytic CO2 desorption performances of seven different catalysts (β, SBA-15, three BS catalysts, Zr@BS, and Fe–Zr@BS) were investigated and assessed from the aspects of the cyclic capacity, desorption rate, and energy consumption. Experimental results indicated that the Fe–Zr@BS catalysts exhibited superior catalytic behaviors than other catalysts studied in this work, improving the desorption factor of MEA solution by 212% and bringing down the energy heat by 33% compared with 5 M MEA solution without catalysts. Furthermore, the Fe–Zr@BS catalysts show good stability and easy regeneration and do not influence absorption performance of the amine solution. Moreover, the possible catalytic mechanism for amine regeneration was proposed, and the stability of the material in terms of the structure of the material and the regeneration heat duty were also studied.
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高影响因子
ANALYST
·
2020
·Vol. 145
·期 10
·3528-3534
·
IF 3.978
Zhijian Mai,Hao Li,Yixun Gao,Yue Niu,Yongrui Li,Nicolaas Frans de Rooij,Ahmad Umar,M. S. Al-Assiri,Yao Wang,Guofu Zhou
A tetraphenylethylene (TPE) derivative (N,N-dimethyl-N′-(4-(1,2,2-triphenylvinyl)phenyl)acetimidamide, TPE-amidine) was designed and synthesized, and used to prepare visible CO2 chemosensors, TPE-amidine-L (liquid) and TPE-amidine-S (solid). The hydrophilicity of TPE-amidine thoroughly changed because of the unique reversible reaction between the amidine group and CO2, which controlled the molecular aggregation extent in water by CO2. Combining with the well-known aggregate-induced emission effect, the highly selective CO2 chemosensor TPE-amidine-L was developed, which has the lowest CO2 detection limit of 24.6 ppm compared with other reported CO2 chemosensors, and can be regenerated within 10 s by adding triethylamine. With the aim of being safer and more convenient to use, a polyacrylamide hydrogel containing TPE-amidine was prepared as a renewable CO2 sensing “tape” (TPE-amidine-S). The flexibility, adhesivity, CO2 sensitivity and reversibility of the “tape” is systematically investigated, showing great potential for “on-site” and “real-time” CO2 detection in practical applications.
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PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2015
·
IF 5.056
Qingping Xin,Yuying Gao,Xingyu Wu,Congdi Li,Tianyu Liu,Yue Shi,Yifan Li,Zhongyi Jiang,Hong Wu,Xingzhong Cao
One-dimensional aminated titania nanotubes were prepared by a facile distillation-precipitation polymerization method and were incorporated into sulfonated poly(ether ether ketone) (SPEEK) to fabricate mixed matrix membranes (MMMs). The aminated titania nanotubes (TNT-IM) with abundant amine groups increased the CO 2 -facilitated transport sites in MMMs. Moreover, the CO 2 -facilitated transport pathways (CO 2 -FTP) were constructed from aminated titania nanotubes in polymer matrix , and acted as the fast CO 2 transport channels to transfer CO 2 molecules continuously and smoothly. Water uptake and water state in MMMs also played an important role in the gas separation performance. The relationship between the water content and CO 2 separation performance was investigated. Nanotubes as fillers showed water retention properties during water evaporation from the MMMs at low humidity. The highest ideal selectivities of the SPEEK/TNT-IM MMMs for CO 2 /CH 4 and CO 2 /N 2 were 56.8 and 62.0, respectively, with a CO 2 permeability of 2090 Barrer.
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高影响因子
GREEN CHEMISTRY
·
2016
·Vol. 18
·期 11
·3370-3377
·
IF 8.506
Wenjing Yang,Haiyang Cheng,Bin Zhang,Yan Li,Tong Liu,Mingli Lan,Yancun Yu,Chao Zhang,Weiwei Lin,Shin-ichiro Fujita,Masahiko Arai,Fengyu Zhao
The hydrogenation of levulinic acid (LA) to γ-valerolactone (GVL) was studied with a homogeneous RuCl2(PPh3)3 catalyst in supercritical CO2 (scCO2). The conversion of LA was observed to increase with CO2 pressure and the possible reasons for this rate acceleration were discussed, including the molecular interactions of CO2 with the reacting and catalytic species as well as the acidity and phase behavior of the reaction mixture. The interaction between CO2 and RuCl2(PPh3)3 was significant, which resulted in the production of an active RuHCl(CO)(PPh3)3 complex and thus enhanced the rate of hydrogenation in the presence of CO2.
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高影响因子
APPLIED ENERGY
·
2017
·
IF 7.182
Zheng Li,Dong-Liang Zhong,Yi-Yu Lu,Jin Yan,Zhen-Lin Zou
This work presents an investigation of using tetra- n -butyl phosphonium bromide (TBPB) semiclathrate hydrate for CO 2 capture from simulated shale gas that is composed of 40% CO 2 and 60% CH 4 in mole fraction. The experiments were performed in a stirred tank reactor with the mass fraction of TBPB ( w TBPB ) varying from 5.0% to 33.2%. The phase equilibrium data of TBPB semiclathrate hydrate formed in the presence of the 40% CO 2 /CH 4 gas mixture were measured and reported. The effects of TBPB concentration on gas solubility, hydrate formation kinetics, and CO 2 separation efficiency were investigated in the temperature range of 278.1–284.2 K with the initial pressure fixed at 2.8 MPa. The results indicated that at a fixed driving force (overpressure), the gas uptake obtained at the induction time was nearly constant, despite the variation in TBPB concentration, while the rate of hydrate formation increased with the increase in TBPB concentration. Compared to the results obtained at a mole fraction of 1% THF, it was found that enhanced hydrate formation kinetics, a higher CO 2 separation factor (31.7 ± 3.3), and a higher operating temperature (284.2 K) were obtained at the stoichiometric TBPB concentration ( w TBPB = 33.2%). Therefore, TBPB may be used as a promising promoter for hydrate-based CO 2 capture from the simulated shale gas (CO 2 /CH 4 gas mixture).
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高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Ji Liu,Yuan-gu Xia,Meng-fan Liu,Bin Hu,Hong-jin Zhang,Ji-hong Li,Zhen-xi Zhang,Qiang Lu
Nitrogen oxides are the major pollutants in solid fuel/waste combustion processes, which can be reduced by unburned or additive chars. The surface char–NO reaction is significantly influenced by CO 2 , whereas the impact mechanism is far from conclusive. Herein, fixed-bed experiments and computational methods were adopted to elucidate the role of CO 2 on char–NO reaction. Experimentally, CO 2 exhibited an inhibitive impact on NO reduction at 873 K but a promotive influence at 1023 K and 1173 K. According to the detection of outlet CO, characterization of char, and density function theory (DFT) calculations, CO and gasified char derived from char–CO 2 gasification are both responsible for the promotive effect at 1173 K, which offers a clear image of the gasification mechanism conjectured in previous work. More importantly, a CO 2 -mediated oxygen rearrangement (CO 2 -MOR) mechanism has been found and confirmed for the first time, which can well explain the experimental results observed at 873 K and 1023 K. The adsorbed CO 2 can intervene in the oxygen rearrangement on the char surface to alter the NO reduction behaviors. The present study offers a comprehensive insight into the roles of CO 2 in the heterogeneous reduction of NO on char surface.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Caifeng Xia,Qikang Yin,Xinle Sun,Qinglong Liu,Sen Liu,Shuxian Wei,Siyuan Liu,Weifeng Lv,Zhaojie Wang,Xiaoqing Lu
As a unique polymer of intrinsic microporosity, PIM-1 has great potential in mixed matrix membranes (MMMs) for gas separation with ultra-high permeability. However, the separation performance, e.g. CO 2 /N 2 separation, is still limited by its poor selectivity. In this work, PIM-1-based MMMs containing tartaric acid anion intercalated layered double hydroxides (TA-LDH) nanofillers are successfully prepared. The uniformly dispersed TA-LDH in the PIM-1 matrix contributes to optimizing the stacking of polymer chains for accessible pores, which is conducive to CO 2 diffusion. In addition, the assistant experiment and theoretical calculation point out that the -COO - , –OH between the TA-LDH layers had an affinity for CO 2 , creating a two-dimensional fast transport channel between the enlarged interlayer space. Compared with the pristine PIM-1 membrane, the CO 2 permeability and CO 2 /N 2 selectivity of 0.7 % TA-LDH/PIM-1 membrane is increased by 43.19 % and 105.48 %. The excellent gas separation performance with CO 2 permeability of 8343.18 Barrer and CO 2 /N 2 selectivity of 39.02 exceeds the 2019 Robson upper limit. This paves a new way to improve the gas separation performance of PIM-1-based MMMs and suggests high perspectives for real applications.
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高影响因子
ENERGY
·
2025
·
IF 9.4
Ming-Long Wang,Yi-Fei Sun,Hong-Nan Chen,Jin-Rong Zhong,Dan Rao,Yu Liu,De-Jun Xuan,Bei Liu,Chang-Yu Sun,Guang-Jin Chen
CO 2 hydrate provides an important way for the long-term stable CO 2 geological sequestration considering CO 2 has potential self-sealing ability in submarine hydrate stable zone. However, the insufficient displacement efficiency of pore water and hydrate conversion rate pose significant challenges to ensuring long term CO 2 injection and hydrate sequestration under shallow burial sediments. Here, to enhance CO 2 injection into water-saturated sediments and hydrate conversion, we report a novel self-emulsification injection approach via penicillin G sodium solution pre-injection, which enables the rapid dispersion of injected CO 2 into the pore water as micro- and nano-sized CO 2 droplets in submarine sediments. The effects of liquid CO 2 injection rate, flow distance, sediment particle size, and reagent dosage on droplet dispersion were quantitatively analyzed. On this basis, we further tested its complex behaviors of displacement flow and hydrate formation. The results indicate that compared to conventional liquid CO 2 injection, self-emulsification injection effectively reduces injection pressure by 25 %–49 % and achieves the CO 2 storage density up to 181 kg/m 3 , indicating that this method is more suitable for rapid and large-scale CO 2 injection on the seabed. Moreover, the sufficiently small CO 2 microdroplets generated by self-emulsification flow almost eliminate the interphase hydrate membrane effect, thereby increasing the CO 2 hydration rate to over 70 %. This provides a guarantee for the effective establishment of CO 2 hydrate sealing cap in shallow seabed sediments. Given its comprehensive excellent performance, the self-emulsification injection technology is expected to significantly advance the hydrated CO 2 sequestration.
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高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Tiehuai Li,Jing Wang,Shangqian Zhu,Ernest Pahuyo Delmo,Fei Sun,Lili Zhang,Meng Gu,Minhua Shao
Developing catalysts with high faradaic efficiency and durability for advanced products is a critical issue for ensuring commercial application of CO 2 electrochemical reduction reaction. In this study, a series of Cu 3 Pd x N nanoparticles are developed by one-pot organic phase synthesis and the composition-dependent performance for CO 2 electrochemical reduction reaction is systematically investigated. The highest faradaic efficiency towards methane generation can reach 57.5% on Cu 3 Pd 0.62 N nanoparticles at -1.25 V vs the reversible hydrogen electrode . Moreover, the high faradaic efficiency of methane can be maintained during the 4 h continuous electrolysis. Our results indicate that the appropriate content of Pd could enhance the selectivity of methane and improve the stability of the catalysts.
研究领域:
材料科学
·
电化学
·
环境科学
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高影响因子
ULTRASONICS SONOCHEMISTRY
·
2021
·
IF 7.491
Yang Yang,Yiqing Feng,Kejian Li,Saira Ajmal,Hanyun Cheng,Kedong Gong,Liwu Zhang
Among the possible products of CO 2 electrochemical reduction, CO plays a unique and vital role, which can be an ideal feedstock for further reduction to C 2+ products, and also the important component of syngas that can be used as feedstock for value-added chemicals and fuels. However, it is still a challenge to tune the CO selectivity on Cu electrode. Here we newly construct an ultrasound-assisted electrochemical method for CO 2 reduction, which can tune the selectivity of CO 2 to CO from less than 10% to >80% at −1.18 V versus (vs.) reversible hydrogen electrode (RHE). The partial current density of CO production is significantly improved by 15 times. By in-situ Raman study, the dominating factor for the improved CO production is attributed to the accelerated desorption of *CO intermediate. This work provides a facile method to tune the product selectivity in CO 2 electrochemical reduction.
研究领域:
电化学
·
材料科学
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高影响因子
AICHE JOURNAL
·
2021
·Vol. 68
·期 3
·e17528
·
IF 3.993
Meng Zhao,Yujie Ban,Ze Chang,Yingwu Zhou,Kun Yang,Yuecheng Wang,Na Cao,Weishen Yang
A series of pyrazine-interior-embodied metal–organic framework-74 composites (py-MOF-74) were successfully synthesized by a post-synthetic vapor modification method. Here, pyrazine molecules occupy the cavity to block the wide pores of MOF-74, which accentuates the difference in adsorption of a pair of gases on MOFs and consequently reinforces the adsorption selectivity. Different from the “physical confinement” of occupants, the pyrazine molecule with dual “para-nitrogen” atoms donates one N atom to bond with the open metal ion of MOF-74 for stability and the other N atom for potential CO 2 trapping. Typically, py-MOF-74c with the highest pyrazine insertion ratio displays selectivity greatly superior to that of MOF-74 in equimolar CO 2 /CH 4 (598 vs. 35) and in simulated CO 2 /N 2 flue gas (471 vs. 49). Py-MOF-74 entities are long-lived adsorbents, and their CO 2 capacity can be maintained even after storage for 1 year in air. Py-MOF-74 also showed a sharp molecular sieve property in fixed-bed cycle adsorption tests, which implies its great potential in real applications.
研究领域:
材料科学
·
环境科学
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高影响因子
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