The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Hao Wu - One of the best experts on this subject based on the ideXlab platform.
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combined effect of chemical and turbulent Agglomeration on improving the removal of fine particles by different coupling mode
Powder Technology, 2019Co-Authors: Linjun Yang, Ao Shen, Lei Zhou, Hao WuAbstract:Abstract Both the chemical and turbulent Agglomeration are promising pretreatment technologies for promoting the removal of fine particles. However, single chemical and turbulent Agglomeration both have some shortcomings in improving the Agglomeration of fine particles. Based on the combination of chemical and turbulent Agglomeration, different coupling modes of chemical and turbulent Agglomeration were proposed and investigated to get the most effective mode in this study. In order to compare the effect of the two coupling modes, the particle Agglomeration effect and removal performance by ESP under different Agglomeration conditions were studied respectively. The results showed that chemical-turbulent Agglomeration had more advantages over turbulent-chemical Agglomeration. Furthermore, the interaction mechanism of chemical-turbulent Agglomeration was explored by analyzing the motions of chemical droplets and particles in turbulent agglomerator and the promoting effect of chemical Agglomeration on turbulent Agglomeration. The calculation results showed that in the process of chemical-turbulent Agglomeration, the turbulent Agglomeration improved the effect of chemical Agglomeration by affecting the motion trajectories of droplets and particles, and the chemical Agglomeration improved the probability of particles collision in turbulent Agglomeration by enlarging the particle size before turbulent Agglomeration, which made chemical-turbulent Agglomeration more effective than turbulent-chemical Agglomeration.
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improving the removal of fine particles from coal combustion in the effect of turbulent Agglomeration enhanced by chemical spray
Fuel, 2018Co-Authors: Linjun Yang, Ao Shen, Bin Hu, Xiaobei Wang, Hao WuAbstract:Abstract Turbulent Agglomeration is a simple and economical method to improve the Agglomeration of fine particles from coal combustion, which is beneficial to the particle removal efficiency of conventional equipment. However, the Agglomeration efficiency for fine particles is low by single turbulent Agglomeration because of the weak adhesion forces between particles, which leads to plenty of ineffective collisions. In this study, a novel technique was presented to improve the effect of fine particles Agglomeration in turbulent Agglomeration by adding chemical spray. The influence of single turbulent Agglomeration and chemical-turbulent Agglomeration on fine particle concentrations, particle size distributions, ESP performance, particle removal efficiencies in different stages and total dust concentrations after ESP were investigated respectively. The results showed the chemical-turbulent Agglomeration had better effects on the Agglomeration and removal of fine particles than single turbulent Agglomeration. After chemical-turbulent Agglomeration, the PM10 number concentration decreased about 34.1% than single turbulent Agglomeration, and particle number concentration dropped at each stage under 10 µm, especially at 0.1 µm. Meanwhile, the application of chemical-turbulent Agglomeration led to the number removal efficiency of PM10 increasing from 82.6% to 89.9%, the mass removal efficiency increasing from 84.5% to 91.8%, and the total dust concentrations after ESP reducing about 638 mg·m−3 than single turbulent Agglomeration, respectively. Furthermore, the enhancement mechanism of chemical-turbulent Agglomeration was explored by analyzing adhesion forces between particles and calculating the turbulent Agglomeration kernel. In this study, the capillary and solid-bridge forces between particles and the increasing value of KTS after chemical spray were considered as the main reasons for better effects of chemical-turbulent Agglomeration.
Tomoaki Hino - One of the best experts on this subject based on the ideXlab platform.
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improved flowability and compactibility of spherically agglomerated crystals of ascorbic acid for direct tableting designed by spherical crystallization process
Powder Technology, 2003Co-Authors: Yoshiaki Kawashima, Misato Imai, Hirofumi Takeuchi, Hiromitsu Yamamoto, Kazunori Kamiya, Tomoaki HinoAbstract:Abstract Spherically agglomerated crystals of ascorbic acid with improved compactibility for direct tableting were successfully engineered by the spherical crystallization technique. In this process, ascorbic acid crystals were precipitated by a solvent change method, followed by their Agglomerations with the emulsion solvent diffusion (ESD) or spherical Agglomeration (SA) mechanism. The micromeritic properties, such as flowability and packability of the spherically agglomerated crystals were preferably improved for direct tableting. Under static compression, the acceptable compact (tablet) with a sufficient strength was produced successfully without capping, although the capping occurred with the original unagglomerated crystals. The improved compaction properties of the agglomerated crystals were due to their fragmentation and plastic deformation occurred significantly during compression. This mechanism was supported by higher stress relaxation and less elastic recovery of the compact of agglomerated crystals. It was also found that the spherically agglomerated crystals were tableted directly without capping using a single punch machine under dynamic compression, although the tensile strength of resultant tablet decreased in tolerable degree with increasing punch velocity.
Linjun Yang - One of the best experts on this subject based on the ideXlab platform.
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combined effect of chemical and turbulent Agglomeration on improving the removal of fine particles by different coupling mode
Powder Technology, 2019Co-Authors: Linjun Yang, Ao Shen, Lei Zhou, Hao WuAbstract:Abstract Both the chemical and turbulent Agglomeration are promising pretreatment technologies for promoting the removal of fine particles. However, single chemical and turbulent Agglomeration both have some shortcomings in improving the Agglomeration of fine particles. Based on the combination of chemical and turbulent Agglomeration, different coupling modes of chemical and turbulent Agglomeration were proposed and investigated to get the most effective mode in this study. In order to compare the effect of the two coupling modes, the particle Agglomeration effect and removal performance by ESP under different Agglomeration conditions were studied respectively. The results showed that chemical-turbulent Agglomeration had more advantages over turbulent-chemical Agglomeration. Furthermore, the interaction mechanism of chemical-turbulent Agglomeration was explored by analyzing the motions of chemical droplets and particles in turbulent agglomerator and the promoting effect of chemical Agglomeration on turbulent Agglomeration. The calculation results showed that in the process of chemical-turbulent Agglomeration, the turbulent Agglomeration improved the effect of chemical Agglomeration by affecting the motion trajectories of droplets and particles, and the chemical Agglomeration improved the probability of particles collision in turbulent Agglomeration by enlarging the particle size before turbulent Agglomeration, which made chemical-turbulent Agglomeration more effective than turbulent-chemical Agglomeration.
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improving the removal of fine particles from coal combustion in the effect of turbulent Agglomeration enhanced by chemical spray
Fuel, 2018Co-Authors: Linjun Yang, Ao Shen, Bin Hu, Xiaobei Wang, Hao WuAbstract:Abstract Turbulent Agglomeration is a simple and economical method to improve the Agglomeration of fine particles from coal combustion, which is beneficial to the particle removal efficiency of conventional equipment. However, the Agglomeration efficiency for fine particles is low by single turbulent Agglomeration because of the weak adhesion forces between particles, which leads to plenty of ineffective collisions. In this study, a novel technique was presented to improve the effect of fine particles Agglomeration in turbulent Agglomeration by adding chemical spray. The influence of single turbulent Agglomeration and chemical-turbulent Agglomeration on fine particle concentrations, particle size distributions, ESP performance, particle removal efficiencies in different stages and total dust concentrations after ESP were investigated respectively. The results showed the chemical-turbulent Agglomeration had better effects on the Agglomeration and removal of fine particles than single turbulent Agglomeration. After chemical-turbulent Agglomeration, the PM10 number concentration decreased about 34.1% than single turbulent Agglomeration, and particle number concentration dropped at each stage under 10 µm, especially at 0.1 µm. Meanwhile, the application of chemical-turbulent Agglomeration led to the number removal efficiency of PM10 increasing from 82.6% to 89.9%, the mass removal efficiency increasing from 84.5% to 91.8%, and the total dust concentrations after ESP reducing about 638 mg·m−3 than single turbulent Agglomeration, respectively. Furthermore, the enhancement mechanism of chemical-turbulent Agglomeration was explored by analyzing adhesion forces between particles and calculating the turbulent Agglomeration kernel. In this study, the capillary and solid-bridge forces between particles and the increasing value of KTS after chemical spray were considered as the main reasons for better effects of chemical-turbulent Agglomeration.
Liang Dong - One of the best experts on this subject based on the ideXlab platform.
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whether carbon intensity in the commercial building sector decouples from economic development in the service industry empirical evidence from the top five urban Agglomerations in china
Journal of Cleaner Production, 2019Co-Authors: Wei Cai, Weiguang Cai, Liang DongAbstract:Abstract With the surging urbanization process and rapid economic growth in the service industry, carbon emissions released by the commercial building sector have become critical for China’s national action towards meeting the “Post Paris” mitigation target. This paper is the first to confirm whether carbon intensity in the commercial building sector decouples from the economic development in service industry via the decomposition and decoupling methods at both the scales of the nation and the top five urban Agglomerations [Jing-Jin-Ji (JJJ), Yangtze-River-Delta (YRD), Pearl-River-Delta (PRD), Yangtze-River-Middle-Reach (YRMR), and Cheng-Yu (CY) urban Agglomerations] in China during the 2000–2015 period. The key findings indicate the following. The nationwide decoupling status was weak from 2001 to 2005 and then strong from 2006 to 2015. At the scale of urban Agglomeration, only four states were observed in the decoupling status, and the order of the decoupling statuses across the different urban Agglomerations is as follows: JJJ > CY > YRD > PRD > YRMR (2001–2005), YRD > JJJ > PRD > CY > YRMR (2006–2010), and YRD > YRMR > JJJ > CY > PRD (2011–2015). The carbon Kuznets curves of the commercial building sector successfully reveal the causes of the different decoupling paths across different urban Agglomerations. The growing decoupling effects can be attributed to the rapid development of energy conservation projects in the commercial building sector over the past decade. Overall, it is expected that our contribution covers the research gap of decoupling carbon intensity in the commercial building sector from economic growth in the service industry, and our efforts constitute a significant contribution to the analysis of the carbon emission peak in the Chinese commercial building sector.
Yongrong Yang - One of the best experts on this subject based on the ideXlab platform.
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Particle Agglomeration and control of gas-solid fluidized bed reactor with liquid bridge and solid bridge coupling actions
Chemical Engineering Journal, 2017Co-Authors: Yefeng Zhou, Qiang Shi, Zhengliang Huang, Jingdai Wang, Yongrong YangAbstract:Fluidized beds reactors with liquid bridge and solid bridge coupling actions have been widely used in industry and thus studies of particle Agglomerations under such fluidization conditions are of great significance. This work proposed an experimental apparatus combining electro-magnetic induction heating system with fluidized bed to simulate the real conditions for particle reaction heat release and heat transfer in industrial polymerization fluidized bed reactors. The effects of liquid content on Agglomeration behavior of wax/graphite composite particles under different fluidization gas temperatures, gas velocities and heating powers have been studied. Through a force balance analysis of particles with liquid bridge and solid bridge coupling actions, relative solid bridge force was taken as a key parameter to demonstrate the effects of solid bridge force and other forces on Agglomerations. Results showed that as the relative solid bridge force varied in different ranges, the Agglomeration mass presented three different variation trends with liquid increases, namely monotonic increasing, non-monotonic changing and monotonic decreasing, due to different dominating agglomerating mechanisms (liquid evaporation and liquid bridge) during fluidization. According to the results of this study, the proposed criterion based on relative solid bridge force can be used to guide the regulation and control of particle Agglomerations in fluidization with liquid bridge and solid bridge coupling actions.
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Agglomeration detection in horizontal stirred bed reactor based on autoregression model by acoustic emission signals
Industrial & Engineering Chemistry Research, 2012Co-Authors: Yefeng Zhou, Zhengliang Huang, Jingdai Wang, Congjing Ren, Yongrong YangAbstract:Agglomeration occurring in horizontal stirred bed reactors (HSBR) for polyolefin production has negative impacts on the efficiency of the reactor operation and may sometimes lead to unscheduled shutdown of the plant. In this paper, an autoregression (AR) model based on acoustic emission (AE) technique has been proposed to establish the qualitative relationship between AE signals and Agglomeration in the HSBR. In this method, the frequency of AE signal varies with particles of different sizes striking the reactor walls. From the cold model experiments, it was found that AR power spectrum became fluctuant after the addition of Agglomerations into laboratorial scale HSBR, and meanwhile the low frequency band energy ratio and the variance of AE signals kept rising. Furthermore, this AE-based AR model was also successfully applied to detect the Agglomeration in an industrial HSBR unit, showing that the method could monitor Agglomerations in an environmentally friendly manner and with fairly good accuracy.