ENERGY
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2023
·
IF 9
Fanli Meng,Kun Fu,Xueli Wang,Yixiao Wang,Lemeng Wang,Dong Fu
In previous work by Fu et al. (2021, 2022), the performance of 2-ethylhexylan-1-amine (EHA) and diglyme absorbents for carbon dioxide (CO 2 ) capture from flue gas was demonstrated. In this study, dimethyl sulfoxide (DMSO) was selected as a replacement for diglyme due to its high boiling point , low viscosity , and environmentally friendly properties. The optimization of the mass fraction resulted in a composition of 60 wt% EHA and 40 wt% DMSO, considering factors such as absorption capacity , absorption rate, and viscosity. At a desorption temperature of 373 K, the CO 2 -loaded EHA-DMSO exhibited a desorption efficiency of approximately 98 %. The estimation of desorption energy ( E t ) consumption, using the method of electric energy consumption , revealed that EHA-DMSO achieved approximately a 50 % reduction in E t compared to the MEA (30 wt%) absorbent. Even with a water content of 10 %, E t was reduced by around 40 %. Additionally, the absorbent demonstrated notable advantages in terms of water resistance and cycle performance. The advantages of environmental friendliness and easy availability of raw materials suggest that the EHA-DMSO absorbent holds a promising potential for broader application in the field of CO 2 capture from flue gas.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2023
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IF 8.4
Jing Xiao,Jiayuan Tang,Jihong Chen,Lanlan Li,Shu Zhang,Xiaoli Xiong,Zhirong Zou
A facile and portable method was established for the detection of nitrite (NO 2 - ) by a portable gas pressure meter. NO 2 - and sodium cyclamate were reacted specifically under acidic condition, cyclohexene and nitrogen were thus generated, the pressures of reaction bottles were measured by a portable gas pressure meter. The pressures in bottles were increased gradually and proportional to the increase of NO 2 - concentration, the detection of NO 2 - was thus achieved. This method ensured good selectivity for the detection of NO 2 - and avoided interferences from other coexisting ions. In the range of 2–100 mg L −1 (43–2174 μmol L −1 ), the gas pressure was linearly correlated with the NO 2 - concentration, and a limit of detection of 0.65 mg L −1 (14 μmol L −1 ) was obtained. The developed method was further used for NO 2 - detection in water and ham sausage samples, recoveries of 94–106 % were obtained. It is a potential simple, rapid, portable analytical system/method for on-site detection of NO 2 - .
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MICROPOROUS AND MESOPOROUS MATERIALS
·
2023
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IF 5.2
Mingwei Cai,Heng Liu,Jiongcai Chen,Jiahao Wu,Zhenjing Han,Zhiyin Chen,Shiyang Zhang,Yonggang Min
Membrane-based gas separation is attracting more and more attention in hydrogen purification and CO 2 separation. One critical challenging remaining for large-scale production is fabricating a high-performance membrane with both inexpensive and excellent separation performance. In this work, a novel hybrid-carbon molecular sieve (CMS) membranes were reported for hydrogen purification by pyrolysis of commercial polyimide precursor (PMDA-ODA) with incorporation of modified 10X zeolite . The addition of modified 10X zeolite provided additional gas transport channels to the CMS mixed matrix membrane (MMM), and contained a significant fraction of micropores within the 0.6–0.8 nm range, which greatly enhance hydrogen adsorption capacity. Interestingly, despite this, the selectivity for H 2 /N 2 and H 2 /CH 4 also increases with higher zeolite content. This unexpected phenomenon may be attributed to the partial blocking of zeolite pores by CMS strand, which narrows the 10X pore size to a dimension smaller than CH 4 and N 2 , enabling differentiation between H 2 and CH 4 gas pairs. Therefore, the permeability and selectivity of H 2 was significantly enhanced. The CMS/10X-7.5 (with 7.5 wt % 10X zeolite) exhibited an advanced H 2 permeability (1709 Barrer) and high gas selectivity of 551 for H 2 /CH 4 and 105 for H 2 /N 2 , respectively, which is higher than other samples and exceed the 2015 trade-off lines. Furthermore, the CMS/10X-7.5 delivered excellent stability after 20 cycles. Therefore, this hybrid CMS/10X-7.5 obtained by carbonization of zeolite-doped polymer precursors has great potential for larger industrial applications.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
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IF 8.6
Fanyue Meng,Zequn Yang,Jianping Yang,Lijian Leng,Wenqi Qu,Peizhong Wen,Jiexia Zhao,Hailong Li
Iron sulfides (FeS x ) characterized by the nonstoichiometric coordination between iron and sulfur are promising sorbents for elemental mercury (Hg 0 ) adsorption from industrial flue gas. However, the unstable nature of FeS x tending to self-combust under ambient conditions impedes its scalable synthesis. To overcome this critical challenge, this work developed a cupric ion incorporation method to stabilize FeS x . When the compositional ratios of cupric ion and FeS x both equaled 50%, the composite sorbent as synthesized (50Cu-FeS x ) exhibited ultra-high Hg 0 adsorption capacity and uptake rate that reached 433.2 mg g −1 and 847.4 μg g −1 min −1 , outperforming those benchmark metal sulfides as reported in previous studies for practical uses. In this sample, the copper ion well-incorporated into the lattice of amorphous FeS x was an indispensable fundamental that contributed to its outstanding performance and hydrophobic ability. The stabilized FeS x thus enriched its surface with abundant under-coordinated sulfur due to the nonstoichiometric coordination environment, which acted as the primary active sites for the conversion of Hg 0 because only under-coordinated sulfur could accept electrons Hg 0 donated. The main product after 50Cu-FeS x adsorbed Hg 0 was HgS, an extremely stable mercury form in nature. From these perspectives, it is proper to declare that this work not only proposed an efficient sorbent holding great potential for Hg 0 removal from high-humidity industrial flue gas but also provided a novel method for the rational design of FeS x -based materials with extensive applicability in the future.
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JOURNAL OF CHROMATOGRAPHY A
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2023
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IF 4.1
Di Zhang,Yuchen Zhu,Yan Jin,Boxin Chen,Bin Zhao,Lei Li,Haimei Zhou,Xinxin Li,Dan Zheng,Fei Feng
A composite material was synthesized at room temperature by performing modification of the copper benzene-1,3,5-tricarboxylate (HKUST-1) metal-organic framework material by multilayer fluorinated graphene (FG). The FG-HKUST-1 composite was used as a stationary phase for a micro gas chromatography column (μGCC) fabricated using micro-electro-mechanical system (MEMS) technology. The separation results showed that the μGCC with the FG-HKUST-1 composite stationary phase achieved a baseline separation of C 1 -C 4 in 8 min. The retention factors for C 2 -C 4 were 2.13, 7.14, and 12.04, respectively. The maximum relative standard deviation (RSD) of the retention times was 0.14 %. The difference in the retention time between methane and ethane was 1.11 min, with a resolution of 9.2 for methane and ethane. The retention factor of ethane and the resolution of methane and ethane were increased by 166 % and 114 %. Therefore, this μGCC is promising for separating light hydrocarbons with widely differing concentrations.
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PubMed
高影响因子
EUROPEAN FOOD RESEARCH AND TECHNOLOGY
·
2023
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IF 3.3
Xing Jiali,Xu Xiaorong,Li Yang,Chen Cancan,Mao Lingyan,Luo Xiaohu,Shen Jian,Cheng Hai,Zhang Shufen,Guo Yahui,Gan Ning
Owing to the difficult degradation of phenolic compounds, the existence of phenolic compound residues accumulated through the food chain in crustaceans and their effects on human health have garnered considerable and more attention. However, the current detection methods for phenolic compounds are not only complex and time-consuming but can also detect fewer types of phenols simultaneously. Thus, a simple, high-throughput method without derivatization for the determination of 18 phenolic compounds in crustaceans was developed using a modified QuEChERS sample preparation method combined with gas chromatography-mass spectrometry. The results indicated that the average recovery of the 18 phenolic compounds was 80.2–106.5% at three spiked levels, and the relative standard deviation was 2.6–12.4%. The limits of detection and quantitation were 0.001–0.014 and 0.003–0.042 mg/kg, respectively. Good linear relationships were observed for the phenolic compounds in their corresponding concentration ranges ( R 2 > 0.999). The applicability of the method was assessed by analyzing 16 actual shrimp samples, among which five samples contained residues ranging from 0.013 to 0.042 mg/kg. Moreover, the establishment of this method has important theoretical and practical significance for the determination and control of the residue levels of phenolic compounds in crustaceans. In addition, it can provide a reference for the development of similar detection standard methods in the future.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
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IF 8.6
Jiali Fu,Pu Huang,Yafei Guo,Kaizhuo Fan,Zixuan Wang,Xinlei Xie,Jun Yu,Chuanwen Zhao
Integrating calcium-looping cycle (CaL) with reverse-water–gas-shift (RWGS) reaction represents an effective path to realizing integrated CO 2 capture and utilization (ICCU). Screening a suitable catalyst to construct highly efficient CaO-based dual function materials (DFMs) is essential for CaL-RWGS. In the current work, M@CaO (M = Ni, Co, Mn, and Fe) DFMs are prepared for CaL-RWGS, and the influence of catalyst component on the structure, CO 2 capture and RWGS performance, and kinetic behaviors of the CaO-based DFMs is investigated. Results show that the interaction between CaO and catalyst affects the average grain size and dispersion of metallic catalyst, oxygen vacancy concentration, surface basicity, and reducibility of CaO-based DFMs. The desired Mn@CaO DFMs exhibit outstanding CaL-RWGS performance at 650 °C, 15%CO 2 and 50%H 2 , with a great CO 2 uptake (12.30 mmol CO 2 /g), a favorable CO yield (5.92 mmol CO/g), and an impressive CO 2 conversion (53.53%), as well as a high CO selectivity (89.98%). Furthermore, Mn@CaO exhibits excellent carbonation and regeneration kinetics but inferior working stability for CO 2 capture and CO production in multiple CaL-RWGS cycles. Overall, Mn could be a competitive and cost-effective catalyst candidate for high-performance CaO-based DFMs for CaL-RWGS applications, while further work is needed to improve cyclic stability.
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Chemistry-An Asian Journal
·
2023
·Vol. 18
·期 17
·e202300505
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IF 4.1
Siqi Li,Yuan Qu,Xiang Lu,Feiyu Zhang,Song Liu,Bin Li
Graphical This work successfully prepared vascular bundle Zn 2 SnO 4 using sorghum straw as a biological template through a simple hydrothermal pathway. The material displays a good gas sensing performance and far exceeds that of untreated materials. This low-cost, efficient, and renewable natural biomass template method has been proven to be an effective strategy for producing high-performance gas-sensing materials. The development of butyl acetate sensors with high sensitivity and selectivity has been highly desirable for its harmful effects on human health. In this work, we developed a high-performance butyl acetate sensor based on vascular bundle structure Zn 2 SnO 4 nanomaterial derived from maize straw. The vascular bundle structure Zn 2 SnO 4 with higher specific surface area obtained by calcination to remove the maize straw template, plays the dual role of accelerating the diffusion of gas molecules and providing more active sites. Our research showed that the sensor had a response of 18 to 100 ppm butyl acetate at a working temperature of 250 °C, with a fast response recovery rate (18 s/25 s), which showed significant improvement compared to the Zn 2 SnO 4 sensor prepared without templates. The improved performance can be attributed to the cross-linked nanoparticle chains and gas collision mechanism of the sensor. These findings highlight the potential of our sensor for the detection of butyl acetate gas.
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PubMed
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2023
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IF 7.5
Jian Hu,Long Chen,Pengzhang Chen,Shixi Gu,Yu Zhou,Jilong Zhang,Wenjie Zhao,Honglin Tao,Nan Zhou,Baobin Mi,Fangfang Wu
A newly developed two-step catalytic pyrolysis process (TSCP) based on poly-generation technology is proposed to convert reed straw (RS) into phenol-rich bio-oil, hydrogen-rich gas, and solid carbon degradation material over iron-loaded activated carbon. The effects of the first step pyrolysis temperature (T1) and catalyst composition on the product distribution and target product selectivity were investigated. When T1 was 350 °C and 10% Fe/AC catalyst was selected, the concentration of phenolic compounds and H 2 peaked at 63.87 area% and 63.29 vol%, respectively. The iron-loaded activated carbon catalysts promoted the decarboxylation and decarbonylation reactions of cellulose and hemicellulose decomposition products, as well as the demethylation and demethoxylation reactions of lignin for the selective production of phenolic compounds and hydrogen gas . In addition, 94.7% quinclorac (10 mg/L) removal was achieved with 0.2 g/L 10% Fe/AC catalyst-doped pyrolysis carbon and 2 mM PMS within 90 min. This study could realize the high-value comprehensive utilization of reed and provide a reference for the full quantitative utilization of other agricultural and forestry wastes.
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高影响因子
FUEL
·
2023
·
IF 7.4
Xianbin Huang,Zhiwen Dai,Chao Zhang,Kaihe Lv,Xu Meng,Ren Wang,Shaine Muhammadali Lalji,Muhammad Arqam Khan
Wellbore instability in complex shale formations is a major technical problem that threatens drilling safety and efficiency. In this paper, a hydrophobic cationic polyamine shale inhibitor (HCPA) was prepared by introducing a hydrophobic group in the molecular structure of an amine-based shale inhibitor having a branched structure. The shale inhibition performance of HCPA and the amine-based shale inhibitor without the hydrophobic group (CPA) was investigated. The hydration inhibition mechanism of HCPA was studied by experiments of zeta potential, particle size, contact angle, thermogravimetric analysis (TGA), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), etc. The evaluation results show that HCPA had a better performance than CPA in terms of inhibition of hydration swelling, hydration dispersion and mud making, which indicates that the hydrophobic group is beneficial to improve the inhibition ability of the amine-based shale inhibitor. The mechanism study shows that there is no hydrogen bond between HCPA and clay. The adsorption on the clay surface is mainly driven by electrostatic interaction, which reduces the repulsion of the electric double layer and thus inhibits the osmotic swelling of clay. HCPA could increase the water contact angle of the rock from 36.6° to 133° at a concentration 0.5%, beneficial to reduce surface free energy. The bentonite modified by HCPA had a lower weight loss of at 200 °C than bentonite modified by CPA according to TGA test, and the interlayer spacing of HCPA-modified bentonite was reduced compared with that of the unmodified bentonite, indicating that the ability of bentonite to adsorb water molecules is reduced after the introduction of hydrophobic groups, beneficial to inhibit the crystalline swelling of clays. In addition, HCPA can reduce the imbibition capacity of rocks by reducing the surface tension of water. Therefore, the concept of introducing hydrophobic groups in the molecular structure proposed herein could provide an avenue to develop high-performance shale inhibitors.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Haiqing Chang,Naiming Liu,Fangshu Qu,Xiaoxiang Cheng,Zhiwei Zhou,Ying Liang,Ying Yu,Heng Liang
Membrane fouling is the Achilles heel of membrane-based technologies. Severe membrane fouling occurs when a single microfiltration (MF) membrane is used to treat shale gas produced water (SGPW). Activated by Fe(II), sodium percarbonate (SPC) oxidation combined with aluminum sulfate coagulation was used in this study to evaluate the alleviation of MF fouling for the treatment of two typical SGPW samples with different water quality characteristics from Sichuan Basin. Results showed that pre-treated by oxidation and coagulation, more than 88% of turbidity, 11%–23% of UV 254 , and 11%-36% of DOC were removed. With the increase in SPC dosage, there was a decrease in fluorescent organics, primarily reducing soluble microbial by-product-like components by up to 37.0% for sample 1 and aromatic protein and soluble microbial by-product-like components by up to 66.7% and 71.2% for sample 2, respectively. Compared to low normalized fluxes (2%-6%) for the raw SGPW, 61%-79% of normalized fluxes were obtained using the combination of 10 mmol/L SPC and 0.9 mmol/L Al 2 (SO 4 ) 3 ·18H 2 O. There was a general evolution of complete blocking to intermediate blocking or cake layer filtration for membrane fouling mechanism. Scanning electron microscopy observation, deposited foulants on membrane surface and Fourier transform infrared analysis further confirmed the superior performance of the combination of SPC oxidation and coagulation. Correlation analysis showed that UV 254 ( R 2 = 0.79–0.95) played the most significant role in membrane fouling. Overall, this combined pretreatment process showed a great potential in MF membrane fouling control during the treatment of SGPW.
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JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Jiesong Tan,Yiqing Zeng,Ze-Xian Low,Zhaochen Lin,Xinxiang Xu,Shasha Feng,Zhaoxiang Zhong,Weihong Xing
The filtration of high-temperature flue gases containing complex gas composition and oily particulate matter (PM) poses great challenges to the design of air filtration membranes. Ceramic nanofibers are potential membrane materials that possess the thermal resistance necessary for high-temperature filtration but the inherit poor brittleness limits their use. Herein, we report the fabrication of a flexible and porous Zr-doped TiO 2 nanofibrous membrane (Zr–TiO 2 NFM) for oily PM removal from high-temperature flue gas. The doping of Zr 4+ ions not only improved the mechanical strength , leading to an outstanding tensile strength as high as 1.78 MPa, but also endowed a high specific area (68.34 m 2 g −1 ). The prepared Zr–TiO 2 NFMs possessed a high filtration efficiency of 99.98% with low pressure drop of 96 Pa (industrial gas velocity of 1 m∙min −1 ) and excellent long-term stability after 5 cycles of filtration at 350 °C. Significantly, different capture and evolution behaviors of PM at 25–350 °C were discovered. Below 200 °C, the oily particles would adhere, coalesce, spread out and form oil film on fibers. Different from oily particles, the non-oily particles would attach and accumulate on the fibers when temperatures are higher than 200 °C. This study brings a new insight to deeply understanding the capture process of PM at different temperatures and designing next-generation membranes for high temperature flue gas filtration.
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