Journal of Cleaner Production
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2022
·
IF 11.072
Liang Ma,Xiaoxu Duan,Jiwei Wu,Jianping Li,Lv Peng,Liwang Wang,Lingyu Xiao
Boiler flue gas in the chemical industry contains SO 2 and nitrogen oxides (NO x ). These flue gases not only pollute the environment, but also seriously endanger human health. In this work, we studied the process of jet atomization and swirl enhancement. Then we constructed a miniaturized hydrojet cyclone. After that, we proposed a new type of flue gas purification technology to achieve integrated and efficient desulfurization and denitrification. All studies were based on combining the liquid jet field with the three-dimensional swirl field to increase the mass transfer area of the gas and liquid phases. The industrial sideline test results showed that the gas purification efficiency increased with the increase of inlet velocity and absorption liquid flow rate, Efficiency is always above 80%. Increasing the concentration of activator could significantly improve the desulfurization efficiency by 27%. Increasing the concentration of oxidant was beneficial to denitrification, and the maximum denitrification efficiency of methyldiethanolamine (MDEA) was 98.2%. Overall, this technology can not only help enterprises save maintenance and treatment costs, but also protect the environment by avoiding the harm caused by flue gas pollution.
研究领域:
环境科学
·
化学工程
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高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Na Li,Hongying Wanyan,Shengchang Lu,He Xiao,Min Zhang,Kai Liu,Xiuliang Li,Bihui Du,Liulian Huang,Lihui Chen,Yonghao Ni,Hui Wu
Liquid marbles, as particle-armored droplets, have potential applications in microreactors, biomedicine , controlled release and gas detection. To improve the stability and biocompatibility of marble, biocompatible cellulose acetate particles and 3-allyloxy-2-hydroxy-propyl-cellulose (AHP-cellulose) were used to fabricate robust cellulose-based liquid marbles with excellent stability. Liquid marble was gelled into hydrogel marble via blue-light-irradiated polymerization of AHP-cellulose. The mechanical properties of cellulose-based hydrogel marble are superior to those of liquid marble. The rupture height of liquid marble is 10.5 m, which is 420 times greater than that of water marble (0.025 m). Surprisingly, the hydrogel marble with a 3 % AHP-cellulose concentration remained intact even after being dropped from a height of 50 m, which is comparable with the ability of a leather ball to withstand larger impact. When released from a height of 60 mm, hydrogel marble bounced to approximately 25.5 mm, 881 % higher than liquid marble (2.6 mm). Hydrogel marble exhibited long-lasting stability and was capable of monitoring ammonia with a detection limit of 365.2 mg/m 3 . The biocompatible cellulose-based hydrogel marble with excellent mechanical stability and reusability detection has great potential in chemical and environmental engineering as gas sensors.
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PubMed
高影响因子
Water
·
2023
·Vol. 15
·期 3
·439
·
IF 3.4
Yuting Wang,Haoquan Zhang,Ruixue Zhao,Die Wang,Lu Zhou,Le Han
Shale gas wastewater is a hypersaline industrial effluent in demand of efficient treatment or resource recovery. Membrane distillation (MD) is a heat-driven desalination process of high potential to deal with such streams. However, its application is highly limited by the unsatisfactory hydrophobic membranes that involve a trade-off between vapor permeability and fouling/wetting resistance. Our previous studies highlighted the potential role of an intermediate coating layer of a carbon nanotube (CNT) for the superhydrophobic membrane with 1H,1H,2H,2H-perfluorodecyltriethoxysilane (FAS) grafted to address the trade-off issue against synthetic saline oily wastewater. The work herein investigated its application performance in the continuous concentration and water recovery of real shale gas wastewater, with a commercial PVDF membrane as the reference. The modified membrane recycled 48.2% of the total volume as high-quality water and rejected 99% of feed salinity, achieving a superior concentration rate and flux recovery rate compared to PVDF. The value of the COD, total nitrogen, and ammonia nitrogen in the permeate after the modified membrane was less than 50, 20, and 20 mg/L, meeting the local wastewater discharge standard. It was pointed out that the inorganic fouling for the MD membrane was more of a concern in dealing with a real stream, but the modified membrane exhibited excellent fouling resistance. The cost associated with the treatment was estimated at USD 2.2/m3for a production capacity of 2000 m3/d. The proposed superhydrophobic membrane has proven to be a feasible alternative from both technical and economic standpoints, offering the potential to improve MD effluent water quality and mitigate membrane fouling.Keywords:membrane distillation;shale gas wastewater;carbon nanotube;water recovery;membrane fouling
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Zhang Tianwei,Zhang Shishun,Liu Hao,Xia Dengyou,Guo Zidong,Zhang Cunwei
The carbon reduction policy to address environmental change has increased the storage, transportation, and use of clean energy represented by hydrogen (H 2 ) and natural gas (mainly composed of methane, CH 4 ). However, its risk of ignition and explosion also brought significant safety risks. Although many previous studies have studied the effect of traditional detonation inhibitors, the inhibition effect of composite explosion inhibition materials still needs further research, especially for H 2 explosion inhibition. In this paper, the effect of dry water (DW), a new type of core-shell structure material, in inhibiting the explosion of combustible gases (mainly H 2 and CH 4 ) has been experimentally studied using a typical 20L spherical apparatus. The results shows that DW can significantly reduce the characteristic parameters during the ignition and explosion process of H 2 and CH 4 . However, its ignition and explosion inhibition effect is related to the type of combustible gas. The maximum explosion pressure of CH 4 is significantly reduced, but the maximum pressure reduction rate of H 2 is more significantly reduced. Compared with typical dry powder inhibitors, the effect of DW inhibition in characteristic parameters during the H 2 ignition and explosion is related to concentration. Moreover, the inhibition effect of DW at higher concentrations is significantly better than BC and ABC dry powders at the same concentration. The inhibition mechanism of DW on the ignition and explosion of combustible gases results from a comprehensive synergy of cooling, dilution, homogeneous radical catalytic inhibition, and heterogeneous radical annihilation. The research conclusions can provide a data basis and theoretical guidance for developing explosion inhibition technology and preventing and controlling H 2 explosions.
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JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Zhirong Hu,Haixia Zhang,Xiong-Fei Zhang,Mingmin Jia,Jianfeng Yao
Mixed matrix membranes (MMMs) combine the advantages of both polymers and inorganic fillers, and hold great promise for industrial gas separation. In this work, to enhance the interfacial compatibility between cellulose acetate (CA) matrix and ZIF-8 crystals, an interfacial design strategy was proposed by grafting polyethylenimine (PEI) onto ZIF-8 particles. The introduction of amine-rich PEI could regulate the surface property and maintain the pore accessibility of ZIF-8 crystals. In addition, the amine groups in PEI could interact with hydroxyl/carbonyl groups in CA chains to suppress the non-ideal voids at the ZIF-8/CA interface. With the aid of PEI, the interfacial compatibility between ZIF-8 and CA is substantially enhanced. Compared with pristine CA and ZIF-8@CA membranes, PEI grafted ZIF-8@CA (PZIF-8@CA) membrane exhibits a better gas separation performance, bearing a CO 2 permeability of 150.3 Barrer with CO 2 /N 2 and CO 2 /CH 4 ideal selectivities of 44.2 and 53.7, respectively. The separation mechanisms are attributed to the superior interfacial property , the good dispersion of ZIF-8 particles, the amine groups in PEI, and the high CO 2 solubility of the CA matrix.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Chonghui Zhu,Yifeng Xu,Tingting Zhou,Lichao Liu,Qidai Chen,Bingrong Gao,Tong Zhang
Developing a sensor with high selectivity and fast response-recovery time for detecting ammonia gas in complex environments is a challenging task. However, recent polymer-based ammonia gas sensors often suffer from low sensitivity and long response-recovery time. In this work, with the assistance of sodium dodecyl benzene sulfonate (SDBS), sodium dodecyl sulfate(SDS), and lauryl amine (LA), the PANI films were prepared by interfacial synthesis to obtain the ordered polymer chains and applied to NH 3 sensors. At room temperature , the SDS-functionalized PANI film-based sensor shows a good response to NH 3 (5.4 for 40 ppm NH 3 ), the detection limit is 0.1 ppm, and the recovery time is 12 s, which is better than that similar base on PANI. The functionalized PANI film has an ordered structure to accelerate the electron transport rate and the protonation/deprotonation properties, which make the sensor have excellent gas sensing performance. In addition, the sensor has good reproducibility, moisture resistance , and long-term stability. This result provides important opinions for realizing polymer materials with high gas-sensing properties to NH 3 .
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JOURNAL OF MEMBRANE SCIENCE
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2022
·
IF 10.53
Yunbo Feng,Qian Wang,Lunhao Zhi,Shudong Sun,Changsheng Zhao
Artificial lung membrane as extracorporeal blood-gas barriers could execute similar functions as human alveoli, whereby accomplish blood gas exchange process, providing imperative life support for patients with cardiopulmonary failure. However, the gas exchange performance for current membranous modules is restrained to the dense polymer matrix with low CO 2 permeability. Meanwhile, it has long been difficult to balance the contradiction between haemorrhagic risk generated by heparin systemic anticoagulation and thrombogenesis during extracorporeal blood circulation. Here, inspired by the natural mammalian alveoli, a biomimetic consecutive gas exchange network (CGEN) is constructed on porous PES substrate by using aperture-modulated UIO-66-NH 2 nanoparticles and hydrophilic CO 2 -affinitive polymer matrix to simulate the physiological structures and gas exchange features of human alveoli in vitro. The porous MOF particles within CGEN establish the main gas exchange channels, which not only enhance the total gas permeation, but also improve the CO 2 /O 2 permselectivity to 13.17, approaching to the level of natural alveoli. Additionally, the prepared composite membrane with good hemocompatibility could effectively inhibit the formation of thrombus and provide a reliable local self-anticoagulation state during extracorporeal blood circulation. Overall, this biomimetic thin film composite membrane could provide new ideals for the preparation of advanced artificial lung membrane.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Bingcai Chen,Pengpeng Li,Bing Wang,Yingde Wang
CO sensor is helpful to monitor the working state of combustion equipment, such as industrial boilers and engines, and to ensure the production process and human life safety. However, balancing fast response/recovery and high response value for metal oxide CO sensors remains a challenge. In this work, based on band gap engineering, porous TiO 2 /CeO 2 NSs with different TiO 2 coupling amounts were prepared by hydrothermal method combined with flame annealing. The heterojunction composed of TiO 2 and CeO 2 narrowed the energy band width of the composite system and made the electron transmission more efficient, which endowed TiO 2 /CeO 2 NSs with good gas sensing properties. The results indicated that the response value of TiO 2 /CeO 2 NSs is 9.78 time that of CeO 2 NSs. Its ultrafast response/recovery time (2 s/6 s), good CO selectivity and wide CO monitoring range (500 ppb-5000 ppm) are also impressive. The TiO 2 /CeO 2 NSs sensor has great potential for rapid CO monitoring.
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 51
·期 7
·3843-3850
·
IF 2.047
Wang Q. Y.,Wu Z. F.,Zhang M.,Qin Z. J.,Wang L.,Zhong F. R.,Duan H. M.
To realize the resource utilization of waste mask fibers (MF), a layer of ZnS nanoparticles was grown on MF by a one-step hydrothermal method, and a MF/ZnS sensor was successfully prepared. This is the first time that resource utilization of MF has been combined with the development of a high-performance gas sensor. The MF/ZnS sensor showed high sensitivity and recoverability to target vapors at room temperature. Compared with ZnS powder loaded on a ceramic substrate, the MF/ZnS composite responses to four analytes have been improved by 8.4~35.2 times. In addition, the time for the MF/ZnS sensor to complete one response–recovery cycle for all four analytes was less than 30 s. This should be attributed to the high gas permeability of the MF substrate, which made the ZnS particles loaded on the MF more fully exposed to contact with the target vapors. This work not only provides a simple and low-cost method to optimize the sensing performance of gas sensors but also provides a new way for the resource utilization of MF. Graphic Abstract
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PubMed
高影响因子
AICHE JOURNAL
·
2022
·Vol. 68
·期 8
·e17689
·
IF 4.167
Qiang Zhang,Zhengya Dong,Zhikai Liu,Guangwen Chen
This study aims to investigate the effect of ultrasonic waveforms on the gas–liquid mass transfer process. For a given load power ( P ), continuous rectangular wave yielded stronger bubble oscillation and higher mass transfer coefficient ( k L a ) than continuous triangular and sinusoidal wave. For pulsed ultrasound, the k L a decreased monotonically with decreasing duty ratio ( D ), resulting in weak enhancement at low D (≤33%). For a given average load power ( P A ), concentrating the P for a shorter period resulted in a higher k L a due to stronger cavitation behavior. For a given P A and D , decreasing the pulse period ( T ) led to an increase in k L a , which reached a constant high level when the T fell below a critical value. By optimizing the D and T , a k L a equivalent to 92% of that under continuous ultrasound was obtained under pulsed ultrasound at a D of 67%, saving 33% in power consumption.
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高影响因子
RENEWABLE ENERGY
·
2022
·
IF 8.634
Shanshan Shao,Pengfei Zhang,Xianliang Xiang,Xiaohua Li,Huiyan Zhang
Ketonization of bagasse pyrolysis gas was performed over red mud-based oxides. The maximum yield of ketones in the catalytic conversion of bagasse pyrolysis gas over original red mud was 18.66% at 420 °C. To promote the oxidability of red mud and obtain a higher yield of ketones, the effect of metal oxides (CeO 2 , MnO 2 , TiO 2 , CaO, ZrO 2 ) loading and loading amount of CeO 2 on red mud on ketonization of bagasse pyrolysis gas were studied. The highest yield of ketones of 27.86% was obtained over red mud-based oxides with 40 wt% CeO 2 loading. The oxidability of the catalyst was enhanced greatly by the high loading of CeO 2 , leading to the peroxidation of acetone as the side reaction. To control the oxidability and cut costs, bimetallic oxides were loaded on red mud. The yield of ketones reached 30.12% over the composite red mud catalyst with the loading of 20 wt% CeO 2 and 20 wt% MnO 2 . The rough coating of MnO 2 on the surface of red mud was beneficial to the loading of CeO 2 , resulting in smaller and more uniform grains. This study provides the efficient utilization of red mud and biomass as solid wastes for high-valued chemicals and fuels.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Yanqi Liu,Bo Jiang,Jiaming Luo,Jing Yang,Peichao Lian,Xinzhi Chen,Li Ding,Yi Mei
Two-dimensional (2D) materials bring a great opportunity to fabricate molecular sieving membranes that can potentially break the permeability-selectivity trade-off. Although 2D laminar membranes with interlayer nanochannels as molecular sieving channel were widely studied, for most of reported 2D laminar membranes, it is of a great challenge to fabricate highly ordered interlayer nanochannels for mass transport. Herein, we report a novel kind of black phosphorene membrane which is made from the stacking of highly ordered 2D black phosphorene nanoflakes. The as prepared black phosphorene membrane shows H 2 permeance > 1000 GPU and H 2 /CO 2 selectivity > 100 for H 2 /CO 2 mixed gas, demonstrating an extremely high gas separation performance. The DFT calculation results demonstrate that the interlayer galleries in the black phosphorene membrane allow the H 2 passing through easily while block the other gases with bigger kinetic diameters, matching well with the experimental findings. The present results indicate that the interlayer galleries in the black phosphorene membrane can be applied as molecular sieving channels for gas separation.
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高影响因子
危险品化学品经营许可证（带存储）