FOOD SCIENCE AND BIOTECHNOLOGY
·
2021
·Vol. 30
·期 10
·1303-1312
·
IF 2.391
Duan Di,Huang Yong,Zou Ying,He Bingju,Tang Ruihui,Yang Liuxia,Zhang Zecao,Su Shucai,Wang Guoping,Zhang Deyi,Zhou Chunhui,Li Jing,Deng Maocheng
Analytical method which combines electronic tongue technique and chemometrics analysis is developed to discriminate oil types and predict oil quality. All the studied Camellia oil samples from pressing, n -hexane extraction and supercritical CO 2 extraction (SCCE), were successfully identified by principal component analysis (PCA) and hierarchical cluster analysis (HCA). Furthermore, multi factor linear regression model (MLRM) was established to predict oil quality, which are indicated by acid value (AV) and peroxide value (POV). The practical potential of e-tongue for the discrimination and assessment of Camellia oils has shown promising application in the characterization of Camellia oils in the oil quality evaluation.
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高影响因子
Journal of CO2 Utilization
·
2021
·
IF 7.132
Tianbo Zhou,Yuxue Wang,Huanda Zheng,Bing Du,Laijiu Zheng
Traditional water medium dyeing of polyester-cotton fabrics consumes more water and energy, and causes serious environmental pollution in comparison with one-bath dyeing of single component fiber. To achieve sustainable dyeing of polyester-cotton blends, three reactive disperse dyes with s-triazine reactive group were synthesized, and supercritical CO 2 was used as solvent to conduct the waterless dyeing. The results showed that one-bath dyeing of polyester-cotton blends could be successfully realized with the synthesized dyes. Dyeing performance of the synthesized dyes was constantly improved with the extension of carbon chain on aniline. Compared with other two dyes, the optimal color strength of polyester-cotton blends was obtained with dye 3 using dimethylsulfoxide as co-solvent, and K/S values up to 6.4 were obtained at 100 °C, 20 MPa and 120 min with a dimethylsulfoxide concentration of 80 %. σ K/S values below 0.14 and washing and rubbing fastness above 4 were displayed for the colored samples. In addition, dyeing mechanism of polyester-cotton fabrics with the synthesized dyes was discussed combined with FT-IR measurement and stripping experiments.
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Small Methods
·
2021
·Vol. 5
·期 11
·2100871
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IF 14.188
Hongfei Cheng,Yumei Liu,Jiawen Wu,Zheng Zhang,Xiaogang Li,Xin Wang,Hong Jin Fan
Electrolyzers coupling electrocatalytic hydrogen evolution with oxidation reactions of small organic molecules have the merits of reducing cell voltage and generating high-value products. Herein, an electrolyzer is designed and optimized that can simultaneously achieve efficient hydrogen generation at the cathode, CO 2 absorption by the catholyte, and methanol upgrading to formate at the anode. For these purposes, transition metal phosphides are used as the low-cost catalysts. The unique electrolyzer exhibits a low working voltage of 1.1 V at 10 mA cm −2 . Under optimal conditions, the Faraday efficiencies of hydrogen evolution and formic acid conversion reactions, which are the reaction products at the cathode and anode, respectively, are nearly 100% at various current densities from 10 to 400 mA cm −2 . Meanwhile, the CO 2 absorption rate is about twice that of the hydrogen generation rate, which is close to the theoretical value. An innovative and energy-efficient strategy is presented in this work to realize simultaneous hydrogen production and CO 2 capture based on low-cost catalyst materials.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Shupanxiang Chen,Bo Jia,Yu Peng,Xiao Luo,Yangqiang Huang,Bo Jin,Hongxia Gao,Zhiwu Liang,Xiayi Hu,Yefeng Zhou
In this study, attapulgite (AT) was treated by high-temperature roasting and hydrochloric acid to form HcAT. It was then modified with 3-aminopropyltrimethoxysilane (APS) through the grafting method to synthesize a new adsorbent, which exhibits relatively low regenerative energy consumption in CO2 adsorption and desorption processes. Scanning electron microscopy (SEM), N2 adsorption–desorption, Fourier transform infrared spectroscopy, X-ray diffraction, and thermogravimetric analysis were selected to support the research. The CO2 adsorption process on the adsorbent was studied at different APS loadings and different temperatures. The maximal amount of CO2 adsorbed on the adsorbent is 1.81 mmol/g at 313 K when the APS mass fraction is 30%. The Freundlich isotherm model shows a great correlation with the CO2 adsorption isotherm obtained from the experimental data, and R2 reached up to 0.996. The isosteric heat while CO2 adsorbed on 30%APS-HcAT is calculated as 62.63 kJ/mol. The regeneration cyclic stability of 30%APS-HcAT is excellent, while the CO2 adsorption capacity only decreased by 3.2% after 10 cycles. The energy consumption in the CO2 desorption process was also calculated as 26.875 kJ/mol. Three different kinetic models were selected to fit the experimental data, and two models showed a great fit, which were the pseudo-second and Avrami’s fractional order models. The activation energy of 30%APS-HcAT was 38.826 kJ/mol, which can be calculated from the experimental data, and this value is higher compared with those of the other sorbents modified by the impregnation method and also much lower than the value of the chemical absorption process between traditional amine solvents and CO2.
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Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Liwei Sun,Meilin Yin,Shaokun Tang
In this work, short-chain bi-functionalized ionic liquid (IL) was grafted onto mesoporous alumina (MA) for ideal CO 2 /N 2 selectivity . First, bi-functionalized IL 1-(2-carboxymethyl)-3-methoxyethyl-imidazolium bromide ([CmMOEim][Br]) with ether and carboxyl group was successfully synthesized and the initial decomposition temperature is 165 °C. Then low-cost hydroxyl-MA (MA-OH) was obtained from ordered MA (OMA) with the assist of 30 wt% H 2 O 2 solution to prepare [CmMOEim][Br]-grafted MA with different molar ratios of [CmMOEim][Br] and MA-OH via facile chemical reaction without the introduction of alkoxysilanes . MA-OH material presents slit-like structure and more hydroxyl groups compared to OMA sample before hydroxylation. Crystal structure and morphology of grafted material remains unchanged after grafting process. [CmMOEim][Br] is successfully grafted onto MA-OH via the chemical link of carboxyl group on IL and hydroxyl group on MA-OH. Finally, CO 2 and N 2 capture capacities of different materials were separately evaluated at 0.1 MPa and 25 °C. With the increase of IL dosage, CO 2 capture capacity of the grafting material first enhances and then decreases while N 2 capture capacity gradually falls owing to the high CO 2 affinity of [CmMOEim][Br]. Wherein, [CmMOEim][Br]-grafted MA-0.15 exhibits the optimum CO 2 capture capacity of 45.3 cm 3 /g at 25 °C and ambient pressure. The ideal CO 2 /N 2 selectivity of [CmMOEim][Br]-grafted MA can reach up to 30 based on single-component adsorption isotherms , which is higher than that of [CmMOEim][Br] and MA-OH. Furthermore, CO 2 capture capacity, morphology and structure of [CmMOEim][Br]-grafted MA maintain well even after ten cycles.
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Journal of Environmental Chemical Engineering
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2021
·
IF 5.909
Zeyu Geng,Qin Xie,Zhongjiao Fan,Weining Sun,Wei Zhao,Junhao Zhang,Jianqiu Chen,Yun Xu
Four tertiary amine-based protic ionic liquids (PILs) have been carefully designed to investigate the performance of SO 2 uptake. Their physical properties of densities and viscosities were determined. In the four PILs, the highest capacity for SO 2 of the four PILs reached up to 5.64 mol/kg ILs (P = 1.0 bar, T = 313.2 K). The ideal selectivity of SO 2 /CO 2 was up to 250 in the separation application of SO 2 from CO 2 . The kinetic study demonstrated that the PILs could efficiently capture SO 2 quickly under the ambient pressure. Based on the SO 2 absorption capacity and selectivity, excellent recyclability , and fast absorption process, the PILs in this work are considered as a potential alternative to traditional absorbents in the flue gas desulfurization (FGD).
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ENERGY & FUELS
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2021
·
IF 3.605
Minghui Zhang,Yingying Liu,Yingming Zhu,Kejing Wu,Houfang Lu,Bin Liang
The complexation of metal ions and amines can mediate the chemical equilibrium and the thermal effect between amines and CO2, thus promoting the absorption and desorption of CO2 in amine absorbents. In this work, the effects of Cu(II) on the performances of CO2 absorption and desorption in the Cu(II)–MMEA (2-(methylamino)ethanol)–H2O system were studied. The thermal desorption results show that the temperature increase during CO2 absorption can be mitigated in the presence of Cu(II), and the desorption performance of CO2 can be obviously improved at 75–95 °C. Using the thermal desorption at 85 °C, the CO2 desorption efficiency of MMEA solution containing 0.1 M [Cu] is 16.4% higher than that without cupric ions, and the regeneration energy consumption is reduced by 25%. The electrochemical research results indicate that the electrode structure and temperature affect the electrolysis rate of anodic copper, and the temperature is the key factor to enhance the CO2 desorption rate. Only considering the decomposition voltage, the energy consumption of the absorbent regeneration is 0.5 GJ/t CO2 at 50 °C, which is much lower than that of the thermal desorption method. The anode current efficiency is always about 100%. Increasing the temperature can increase the cathode current efficiency. When nickel foam with a large specific surface area is used as the cathode, the current efficiency can be increased to 100% at 50 °C. The CO2 desorption is significantly improved in a Cu(II)-assisted MMEA–H2O system. The electrochemical method can achieve a desired desorption at a relatively low temperature and greatly reduce the energy consumption of amine absorbent regeneration.
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ACS Omega
·
2021
·
IF 3.512
Chunling Xin,Yang Ren,Zhaofei Zhang,Lili Liu,Xia Wang,Jinmei Yang
Hierarchical porous composite Mg-MOF-74/MCFs were successfully synthesized using a simple and facile method under in situ solvothermal conditions. Textural structures and morphologies of the composites were characterized by X-ray diffraction (XRD), N2 adsorption–desorption isotherms, and scanning electron microscopy (SEM), transmission electron microscopy (TEM), and thermogravimetric analysis (TGA). The results demonstrate that a large amount of nanosized Mg-MOF-74 particles is incorporated into the pores of mesocellular siliceous foams (MCFs) without remarkable aggregation and the composites possess microporous and mesoporous characteristics of both components. In addition, CO2 adsorption properties of the composites were tested in a fixed bed with/without hydrothermal treatment. The total CO2 adsorption capacities were calculated by breakthrough curves. The CO2 adsorption capacity of the composites reaches 1.68 mmol/g, which is smaller than that of pristine Mg-MOF-74. However, the total CO2 adsorption capacity of the composites after hydrothermal treatment reaches 2.66 mmol/g, which is larger than that of Mg-MOF-74 (2.39 mmol/g) under the same condition. XRD patterns and SEM images of the composites demonstrate that the hydrothermal stability and CO2 adsorption performance of the composites were improved compared with those of pristine Mg-MOF-74 after hydrothermal treatment.
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高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2021
·Vol. 25
·期 5
·1645-1655
·
IF 2.647
Bo Shuang,Sun Yue,Li Siyu,Zhou Yuxi,Feng Xuewei,Li Cui
A novel hemoglobin (Hb) imprinted polymers with CO 2 response (CHIPs) were prepared on the surface of Au electrode modified by zinc oxide (CHIPs/ZnO/Au) via electrochemically mediated atom transfer radical polymerization (eATRP). The imprinted polymers were synthesized with Hb both as catalyst and template, and N,N-diethylaminoethyl methacrylate (DEAEMA) as CO 2 -responsive functional monomer. The obtained CHIPs/ZnO/Au electrode was characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and electrochemical methods. The results showed that CHIPs/ZnO/Au electrode could give higher affinity for the target protein inside a CO 2 -treated aqueous medium compared to that under N 2 -treated conditions, which make it a good electrochemical biosensor in the presence of CO 2 . The biosensor could be successfully applied for the determination of Hb by differential pulse voltammetry (DPV) measurement. The linear response range of CHIPs/ZnO/Au for detecting Hb was 1.0×10 −12 ~1.0×10 −1 mg L −1 and the detection limit was 2.1×10 −13 mg L −1 ( S / N =3). Briefly, the work in this study introduced an easy and non-toxic method for Hb determination under specific conditions and also provided a progressive approach for designing protein imprinted polymers.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Jinrui Guo,Jing Tian,Jinhua Deng,Xinyu Yang,Binghui Duan,Yong Liu
Electrochemical reduction and photocatalytic reduction of CO 2 have attracted more and more attention, but they also face the problem of low utilization efficiency of electricity and solar energy. In this study, a new strategy of applying a novel Al–Sn-CNTs composite in electrochemical corrosion process was proposed to reduce CO 2 without additional electricity and light. In the Al–Sn-CNTs/CO 2 system, micro galvanic cell with Al as anode and Sn or CNTs as cathode was formed, and CO 2 was reduced to formic acid on the cathode surface . The cumulative formic acid concentration of the Al–Sn-CNTs/CO 2 system achieved 21.18 mg/L within 60 min under the conditions of initial pH 9.0, Cl − concentration 10 mmol/L, and Al–Sn-CNTs composite dosage 2 g/L. Based on the morphology, crystal structure and electrochemical test results of the Al–Sn-CNTs composite, a possible mechanism of CO 2 reduction to formic acid in the Al–Sn-CNTs/CO 2 system was proposed.
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Journal of CO2 Utilization
·
2021
·
IF 7.132
Liang Ma,Long Zhao,Yun Li,Jianbin Zhang
The controllable synthesis of pure vaterite with the good properties and broad application prospects is considered as an important, yet a challenging task because the product properties are greatly affected by reaction conditions. In the present work, the controllable synthesis of pure vaterite crystals was explored with four different Ca 2+ sources including CaCl 2 , Ca(NO 3 ) 2 , CaBr 2 and Ca(Ac) 2 using an CO 2 -storage material (CO 2 SM) prepared by an indirect CO 2 utilization approach as the CO 3 2− source. The effects of five major reaction conditions including reaction medium, hydrothermal reaction temperature, hydrothermal reaction time, Ca 2+ concentration and sources, and pH and conductivity on the crystallization of CaCO 3 were systemically investigated. It is found that the amounts of CO 2 SM required for the formation of pure vaterite phase are in the order of CaBr 2 (20 g/L CO 2 SM) > Ca(NO 3 ) 2 (16 g/L CO 2 SM) > Ca(Ac) 2 (8 g/L CO 2 SM) due to the effects of ethylenediamine (EDA), diethylene glycol (DEG) and their anions. Especially, vaterite was not found in CaCl 2 system. The effects of Ca 2+ sources on the crystal phase composition of CaCO 3 are revealed for the controllable synthesis of CaCO 3 crystals. Our work not only provides a controllable synthesis method of pure vaterite, but also an indirect CO 2 utilization strategy.
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Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 35
·19681-19686
·
IF 12.732
Zhongjie Yang,Caoyu Yang,Jianyu Han,Wenshi Zhao,Shengxian Shao,Siyu Li,Huiwen Gao,Haijiao Xie,Xiaofei Zhang
Selective electrochemical CO2 reduction to formic acid is an appealing strategy to achieve efficient utilization of CO2. Modification of the catalytic interface with organic linkers has been proven to promote the conversion of CO2 to CO, but the highly selective generation of formic acid is still a challenge. Herein, modification of the interface of graphene oxide (GO) with amide linkages to anchor SnO2 nanoparticles is presented to catalyze the CO2 reduction reaction (CO2RR). As expected, the as-synthesized SnO2/tert-GO shows a competitive high cathodic faradaic efficiency (FE) of 84.4% for formate at −0.96 V and shows long-term stability for the CO2RR. Further, density functional theory (DFT) calculations indicated that amide linkages facilitate the conversion of CO2 to formate.
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