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摘要 ：
Bio-trickling filters (BTFs) can be used to remediate pollution by volatile organic compounds such as toluene. To investigate the effect of filler voidage on pressure drop (Delta P), two parallel BTFs were constructed using ceramsite with different voidages (47.5% for BTF1 and 55% for BTF2) and inoculated with Fusarium fungus to purify toluene. Commutation and stagnation operations were explored as ways to relieve Delta P. In BTF1, commutation temporarily relieved Delta P and maintained it for 7 days. Implementing stagnation on the 178th day for 69 days effectively reduced the Delta P from 720 Pa/m to below 20 Pa/m, which was maintained for 36 days. Compared with BTF1, the filler in BTF2 effectively delayed the increase in Delta P for 70 days or more and ensured stable operation for as long as 174 days. High-throughput sequencing revealed that Fusarium was mainly replaced by Protoctista, Fronsecaea and other fungi in both BTFs, although there were significant differences in their microbial communities. The influences of commutation and stagnation operations on fungal evolution were more obvious in BTF2, in relation to both time and space. The results provide guidance for designing better BTFs to treat hazardous pollutants. (C) 2021 Elsevier Ltd. All rights reserved.
关键词 ：
Bio-trickling filter Bio-trickling filter Blockage Blockage Fusarium Fusarium High-throughput High-throughput Voidage Voidage
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| GB/T 7714 | Zhang, Yun , Liu, Jia , Li, Jian et al. Effects of filler voidage on pressure drop and microbial community evolution in fungal bio-trickling filters [J]. | CHEMOSPHERE , 2021 , 273 . |
| MLA | Zhang, Yun et al. "Effects of filler voidage on pressure drop and microbial community evolution in fungal bio-trickling filters" . | CHEMOSPHERE 273 (2021) . |
| APA | Zhang, Yun , Liu, Jia , Li, Jian , Yue, Tao . Effects of filler voidage on pressure drop and microbial community evolution in fungal bio-trickling filters . | CHEMOSPHERE , 2021 , 273 . |
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摘要 ：
Given the current global energy and environmental issues resulting from the fast pace of industrialization, the discovery of new functional materials has become increasingly imperative in order to advance science and technology and address the associated challenges. The boom in metal-organic frameworks (MOFs) and MOF-derived materials in recent years has stimulated profound interest in exploring their structures and applications. The preparation, characterization, and processing of MOF materials are the basis of their full engagement in industrial implementation. With intensive research in these topics, it is time to promote the practical utilization of MOFs on an industrial scale, such as for green chemical engineering, by taking advantage of their superior functions. Many famous MOFs have already demonstrated superiority over traditional materials in solving real-world problems. This review starts with the basic concept of MOF chemistry and ends with a discussion of the industrial production and exploitation of MOFs in several fields. Its goal is to provide a general scope of application to inspire MOF researchers to convert their focus on academic research to one on practical applications. After the obstacles of cost, scale-up preparation, processability, and stability have been overcome, MOFs and MOF-based devices will gradually enter the factory, become a part of our daily lives, and help to create a future based on green production and green living. (c) 2021 THE AUTHORS. Published by Elsevier LTD on behalf of Chinese Academy of Engineering and Higher Education Press Limited Company. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
关键词 ：
Application Application Green chemical engineering Green chemical engineering Metal-organic frameworks (MOFs) Metal-organic frameworks (MOFs)
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| GB/T 7714 | Kong, Xiang-Jing , Li, Jian-Rong . An Overview of Metal-Organic Frameworks for Green Chemical Engineering [J]. | ENGINEERING , 2021 , 7 (8) : 1115-1139 . |
| MLA | Kong, Xiang-Jing et al. "An Overview of Metal-Organic Frameworks for Green Chemical Engineering" . | ENGINEERING 7 . 8 (2021) : 1115-1139 . |
| APA | Kong, Xiang-Jing , Li, Jian-Rong . An Overview of Metal-Organic Frameworks for Green Chemical Engineering . | ENGINEERING , 2021 , 7 (8) , 1115-1139 . |
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摘要 ：
A series of Pt/TiO2 catalysts were prepared by the impregnation (IM), dry ball mill (DB), or wet ball mill (WB) methods, and their catalytic activity for the oxidation of CO was evaluated. The structure and redox properties of the catalysts were investigated by N-2 desorption, XRD, SEM, TEM, XPS, H-2-TPR, SO2-TPD, and CO chemisorption analysis. It was determined that the preparation method affects the physical structure of the catalyst and the particle size and dispersion of Pt on the catalyst surface. The catalyst prepared by the impregnation method had a more suitable physical structure than the other catalysts, with a smaller particle size, a higher dispersion of Pt on the surface, and the lowest strength of SO2 adsorption. Pt/TiO2(IM) catalysts presented the best catalytic activity for the oxidation of CO in simulated sintering flue gas at 140 degrees C, as well as better sulfur and water resistance with simulated sintering flue gas containing 50 ppm of SO2 and 15% water vapor.
关键词 ：
CO oxidation CO oxidation influence on performances influence on performances preparation method preparation method sulfur and water resistance sulfur and water resistance
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| GB/T 7714 | Cai, Jianyu , Yu, Zehui , Li, Jian . Effect of Preparation Methods on the Performance of Pt/TiO2 Catalysts for the Catalytic Oxidation of Carbon Monoxide in Simulated Sintering Flue Gas [J]. | CATALYSTS , 2021 , 11 (7) . |
| MLA | Cai, Jianyu et al. "Effect of Preparation Methods on the Performance of Pt/TiO2 Catalysts for the Catalytic Oxidation of Carbon Monoxide in Simulated Sintering Flue Gas" . | CATALYSTS 11 . 7 (2021) . |
| APA | Cai, Jianyu , Yu, Zehui , Li, Jian . Effect of Preparation Methods on the Performance of Pt/TiO2 Catalysts for the Catalytic Oxidation of Carbon Monoxide in Simulated Sintering Flue Gas . | CATALYSTS , 2021 , 11 (7) . |
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摘要 ：
The addition of 3% of CeO2 improved the NH3 adsorption performance, the NO oxidation, low temperature NO conversion, and the sulfur and water-resistance of the V2O5-WO3/TiO2 catalyst, established a protective layer against catalyst poisoning. With the increase in the regeneration temperature and time, the deactivation rate gradually increased, and the layered filling could slow down the catalyst's overall deactivation rate. In addition, the BET, SEM, XRD, FT-IR, XPS, TG, H2-TPR, and NH3-TPD results showed that the upper layer catalyst first contacted the SO2 and H2O in the flue gases, leading to the deposition of by-products containing NH4+ and SO42− at the highest level in this catalyst layer. Also, the decrease in the specific surface area and pore volume was most obvious. The experiment selected the NH4+ and SO42− deposition amounts as characteristic indices for judging the catalyst poisoning degree, and they also revealed the catalytic reaction path of the CeO2 on the surface of the V2O5-WO3/TiO2 catalyst. © 2020 Elsevier B.V.
关键词 ：
Ammonia Ammonia Catalysis Catalysis Catalyst poisoning Catalyst poisoning Cerium oxide Cerium oxide Deposition Deposition Selective catalytic reduction Selective catalytic reduction Sulfur dioxide Sulfur dioxide Temperature Temperature Titanium compounds Titanium compounds Tungsten compounds Tungsten compounds Vanadium pentoxide Vanadium pentoxide
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| GB/T 7714 | Liang, Quanming , Li, Jian , Yue, Tao . Promotional effect of CeO2 on low-temperature selective catalytic reduction of NO by NH3 over V2O5-WO3/TiO2 catalysts [J]. | Environmental Technology and Innovation , 2021 , 21 . |
| MLA | Liang, Quanming et al. "Promotional effect of CeO2 on low-temperature selective catalytic reduction of NO by NH3 over V2O5-WO3/TiO2 catalysts" . | Environmental Technology and Innovation 21 (2021) . |
| APA | Liang, Quanming , Li, Jian , Yue, Tao . Promotional effect of CeO2 on low-temperature selective catalytic reduction of NO by NH3 over V2O5-WO3/TiO2 catalysts . | Environmental Technology and Innovation , 2021 , 21 . |
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摘要 ：
A plate-type wet electrostatic precipitator was designed and built to research the particle capture characteristic under atomization of charged water drop. The effects of electric field intensity, residence time, dust concentration, and liquid flow rate on removal efficiency were acquired. Results showed that particle grade penetration ratio with charged droplets was higher than the dry ESP. As the electric field intensity increased, reduction of penetration ratio and outlet concentration firstly increased and then decreased with the division of 3.5kV/cm, at which the outlet PM0.5, PM1 and PM2.5 decreased by 28.7%, 28.0% and 27.1% respectively. Longer residence time resulted in higher removal efficiency under the same applied voltage, the penetration ratio for PM0.5, PM1 and PM2.5 reduced by 50.2%, 49.3% and 48.5% when the residence time increased from 2.14s to 4.04s at 4kV/cm. Particle collision and agglomeration could be reinforced as the increase of dust concentration, thus the removal efficiency increased correspondingly. While the electron density was insufficient for particle charge, further enhancement of dust density led to decrease of removal efficiency. Improving the water flow rate was benefit for particle charge, agglomeration, and increase of removal efficiency. Compared with the traditional wet electrostatic precipitator (WESP), adoption of charged dropletscould largely reduce the water consumption and keepthe collection efficiency at relatively high level. © 2020, Editorial Board of China Environmental Science. All right reserved.
关键词 ：
Atomization Atomization Drops Drops Flow of water Flow of water Electrostatic precipitators Electrostatic precipitators Electric fields Electric fields Dust Dust Efficiency Efficiency Agglomeration Agglomeration Precipitation (chemical) Precipitation (chemical)
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| GB/T 7714 | Teng, Chen-Zi , Li, Jian . Particle collection characteristic in wet electrostatic precipitator under charged water drop atomization [J]. | China Environmental Science , 2020 , 40 (6) : 2389-2397 . |
| MLA | Teng, Chen-Zi et al. "Particle collection characteristic in wet electrostatic precipitator under charged water drop atomization" . | China Environmental Science 40 . 6 (2020) : 2389-2397 . |
| APA | Teng, Chen-Zi , Li, Jian . Particle collection characteristic in wet electrostatic precipitator under charged water drop atomization . | China Environmental Science , 2020 , 40 (6) , 2389-2397 . |
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摘要 ：
The performance of selective catalytic reduction of NO over ceria-titania (Ce-TiOx)-based materials after aging in SO2 atmosphere in the presence and absence of O-2 was investigated, showing that O-2 gave acceleration on the deactivation of the samples for the enhanced SO2 adsorption and sulfation over ceria-based materials. FT-IR and TPD-MS over samples with 10wt%, 50wt% and 90wt% of CeO2 were carried out. The results indicated the poisoning effect of SO2 over Ce-TiOx catalyst for SCR is in accordance with the amount of sulfite or sulfate over Ce-TiOx with a certain percentage of CeO2.
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| GB/T 7714 | Song, Liyun , Zhan, Zongchen , Sun, Xiangli et al. Effect of SO2 treatment in the presence and absence of O-2 over ceria-titania oxides for selective catalytic reduction [J]. | JOURNAL OF MATERIALS SCIENCE , 2020 , 55 (11) : 4570-4577 . |
| MLA | Song, Liyun et al. "Effect of SO2 treatment in the presence and absence of O-2 over ceria-titania oxides for selective catalytic reduction" . | JOURNAL OF MATERIALS SCIENCE 55 . 11 (2020) : 4570-4577 . |
| APA | Song, Liyun , Zhan, Zongchen , Sun, Xiangli , Zhu, Hongtai , Qiu, Wenge , He, Hong et al. Effect of SO2 treatment in the presence and absence of O-2 over ceria-titania oxides for selective catalytic reduction . | JOURNAL OF MATERIALS SCIENCE , 2020 , 55 (11) , 4570-4577 . |
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摘要 ：
A series of Pd-TiO2/Pd-Ce/TiO2 catalysts were prepared by an equal volume impregnation method. The effects of different Pd loadings on the catalytic activity of chlorobenzene (CB) were investigated, and the results showed that the activity of the 0.2%-0.3% Pd/TiO2 catalyst was optimal. The effect of Ce doping enhanced the catalytic activity of the 0.2% Pd-0.5% Ce/TiO2 catalyst. The characterization of the catalysts using BET, TEM, H-2-TPR, and O-2-TPD showed that the oxidation capacity was enhanced, and the catalytic oxidation efficiency was improved due to the addition of Ce. Ion chromatography and Gas Chromatography-Mass Spectrometer results showed that small amounts of dichlorobenzene (DCB) and trichlorobenzene (TCB) were formed during the decomposition of CB. The results also indicated that the calcination temperature greatly influenced the catalyst activity and a calcination temperature of 550 degrees C was the best. The concentration of CB affected its decomposition, but gas hourly space velocity had little effect. H-2-TPR indicated strong metal-support interactions and increased dispersion of PdO in the presence of Ce. HRTEM data showed PdO with a characteristic spacing of 0.26 nm in both 0.2% Pd /TiO2 and 0.2% Pd-0.5% Ce/TiO2 catalysts. The average sizes of PdO nanoparticles in the 0.2% Pd/TiO2 and 0.2% Pd-0.5% Ce/TiO2 samples were 5.8 and 4.7 nm, respectively. The PdO particles were also deposited on the support and they were separated from each other in both catalysts.
关键词 ：
catalytic oxidation catalytic oxidation chlorobenzene chlorobenzene metal metal metal oxide-support interactions metal oxide-support interactions Pd-Ce Pd-Ce Pd-TiO2 Pd-TiO2 synergistic effect synergistic effect TiO2 catalysts TiO2 catalysts
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| GB/T 7714 | Liang, Wenjun , Du, Xiaoyan , Zhu, Yuxue et al. Catalytic Oxidation of Chlorobenzene over Pd-TiO2/Pd-Ce/TiO2 Catalysts [J]. | CATALYSTS , 2020 , 10 (3) . |
| MLA | Liang, Wenjun et al. "Catalytic Oxidation of Chlorobenzene over Pd-TiO2/Pd-Ce/TiO2 Catalysts" . | CATALYSTS 10 . 3 (2020) . |
| APA | Liang, Wenjun , Du, Xiaoyan , Zhu, Yuxue , Ren, Sida , Li, Jian . Catalytic Oxidation of Chlorobenzene over Pd-TiO2/Pd-Ce/TiO2 Catalysts . | CATALYSTS , 2020 , 10 (3) . |
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摘要 ：
In this study, a lab-scaled wet electrostatic precipitator (WESP) was designed to investigate the particle removal with atomization of charged water drop, instead of traditional water film and mechanically atomized spray. The removal performance was comprehensively evaluated via experiments with controlled applied voltage, gas residence time, dust concentration and continuous operation time. The results demonstrated that supplying the charged droplets enables the WESP to achieve higher discharge current and removal efficiency than the dry type. The minimum removal efficiency of the WESP was elevated to 91.69%-95.88% from 91.52% - 93.89% of the dry ESP, as the electric field intensity increased from 2 kV/cm to 5 kV/cm. The coupled effect of the longer residence time and higher applied voltage significantly improved the grade removal efficiency in the WESP, which increased from 91.86%-95.36% to 97.86%-98.89% as they were enhanced from 2.14 s and 2 kV/cm to 4.04 s and 5 kV/cm, respectively. The removal efficiency first increased and then decreased as the dust concentration increased, while the efficiency drop at high dust concentrations could be effectively improved by prolonging gas residence time. Moreover, injection of charged droplets could also keep the advantage of improving removal efficiency over the dry ESP under continuous operation, and the decrease in removal efficiency after a certain operation time could be largely avoided by applying higher voltage. Particularly, the atomization of charged water drop in the current WESP significantly reduced water consumption, meanwhile maintaining the removal efficiencies at a level comparable with traditional water treated processes.
关键词 ：
Atomization of charged water drop Atomization of charged water drop Continuous operation Continuous operation Particle removal Particle removal Water consumption Water consumption Wet electrostatic precipitator Wet electrostatic precipitator
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| GB/T 7714 | Teng, Chenzi , Fan, Xing , Li, Jian . Effect of charged water drop atomization on particle removal performance in plate type wet electrostatic precipitator [J]. | JOURNAL OF ELECTROSTATICS , 2020 , 104 . |
| MLA | Teng, Chenzi et al. "Effect of charged water drop atomization on particle removal performance in plate type wet electrostatic precipitator" . | JOURNAL OF ELECTROSTATICS 104 (2020) . |
| APA | Teng, Chenzi , Fan, Xing , Li, Jian . Effect of charged water drop atomization on particle removal performance in plate type wet electrostatic precipitator . | JOURNAL OF ELECTROSTATICS , 2020 , 104 . |
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摘要 ：
Fungi can be used in a bio-trickling filter (BTF) to treat volatile organic compound pollutants. To explore the effect of liquid supply on the performance of a fungal BTF, a three-layer BTF filled with ceramsite and inoculated with Fusarium oxysporum to treat toluene was constructed. The BTF started rapidly (< 10 days) and could be restarted within 4 days after 24 day' stagnation. High-throughput sequencing showed that Fusarium evolved into a complex microbial system. The middle layer had the most even proportions of dominant fungi and the highest coexistence of various genera. The effect of liquid supply on the performance of microorganism in the BTF was investigated in detail. The pH of the nutrient liquid fluctuated between 5.6 and 8.1. Small amounts of nutrient sprayed at frequent intervals (49 mL every 2 h) and a minimum humidity of 40 % provided optimal conditions for fungal survival. Nutrient replacement cycle can be extended from one week to two weeks, and timely removal of microelements can enhance the microbial activity. Moreover, fungi can grow well at ambient temperatures of 16 to 28 degrees C.
关键词 ：
Microbial diversity Microbial diversity Fungi Fungi Bio-trickling filter Bio-trickling filter Toluene Toluene Nutrient supply Nutrient supply
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| GB/T 7714 | Zhang, Yun , Liu, Jia , Xing, Hehe et al. Effect of liquid supply on the performance of a fungal bio-trickling filter treating hydrophobic VOC [J]. | BIOCHEMICAL ENGINEERING JOURNAL , 2020 , 161 . |
| MLA | Zhang, Yun et al. "Effect of liquid supply on the performance of a fungal bio-trickling filter treating hydrophobic VOC" . | BIOCHEMICAL ENGINEERING JOURNAL 161 (2020) . |
| APA | Zhang, Yun , Liu, Jia , Xing, Hehe , Li, Jian . Effect of liquid supply on the performance of a fungal bio-trickling filter treating hydrophobic VOC . | BIOCHEMICAL ENGINEERING JOURNAL , 2020 , 161 . |
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摘要 ：
This paper presents a single-piston free piston expander-linear generator for small-scale organic Rankine cycle. In order to achieve stable operation, two types of valve timing control methods are developed: time control method (TCM) and position control method (PCM). The orthogonal experimental design is adopted to evaluate the influence degree and significance level of different factors on the prototype performance. Results show that the symmetry motion characteristics are worse when the TCM is used than those of the PCM. Furthermore, such characteristics could be improved by appropriately increasing expansion duration and intake duration tBT. For the PCM, operating frequency gradually increases as external resistance, intake pressure, and intake duration but significantly decreases as theoretical stroke. For the TCM, operating frequency is only related with intake and expansion durations. Intake pressure has the greatest influence on the peak power output, peak velocity, and actual stroke length, followed by intake duration. Theoretical stroke is the dominant factor affecting operating frequency, followed by intake pressure, and then by intake duration and external resistance. Thermal-work, work-electric, and thermal-electric conversion efficiencies can achieve a maximum of 5.4%, 28.8%, 1.4%, respectively. (C) 2020 Elsevier Ltd. All rights reserved.
关键词 ：
Valve timing control method Valve timing control method Orthogonal experimental design Orthogonal experimental design Free piston expander Free piston expander Conversion efficiency Conversion efficiency Single piston Single piston
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| GB/T 7714 | Li, Jian , Yang, Fubin , Zhang, Hongguang et al. Comparative analysis of different valve timing control methods for single-piston free piston expander-linear generator via an orthogonal experimental design [J]. | ENERGY , 2020 , 195 . |
| MLA | Li, Jian et al. "Comparative analysis of different valve timing control methods for single-piston free piston expander-linear generator via an orthogonal experimental design" . | ENERGY 195 (2020) . |
| APA | Li, Jian , Yang, Fubin , Zhang, Hongguang , Wu, Zhong , Tian, Yaming , Hou, Xiaochen et al. Comparative analysis of different valve timing control methods for single-piston free piston expander-linear generator via an orthogonal experimental design . | ENERGY , 2020 , 195 . |
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