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| 1 | Simultaneous desulfurization and denitrification of sintering flue gas via composite absorbent显示文摘Experiments on simultaneous absorption of SO_2 and NO_X from sintering flue gas via a composite absorbent NaClO_2/NaClO were carried out. The effects of various operating parameters such as NaClO_2 concentration(ms), NaClO concentration(mp), molar ratio of NaClO_2/NaClO(M), solution temperature(TR), initial solution pH, gas flow(Vg) and inlet concentration of SO_2(CS) and NO(CN) on the removal efficiencies of SO_2 and NO were discussed. The optimal experimental conditions were determined to be initial solution pH = 6, TR=55 °C and M = 1.3 under which the average efficiencies of desulfurization and denitrification could reach99.7% and 90.8%, respectively. Moreover, according to the analysis of reaction products, it was found that adding NaClO to NaClO_2 aqueous solution is favorable for the generation of ClO_2 and Cl_2 which have significant effect on desulfurization and denitrification. Finally, engineering experiments were performed and obtained good results demonstrating that this method is practicable and promising. | Jie Wang Wenqi Zhong | 2016 | Chinese Journal of Chemical Engineering2016，24，8： | 27 |
| 2 | CFD-DEM simulation of spouting of corn-shaped particles显示文摘Three dimensionally coupled computational fluid dynamics (CFD) and discrete element method (DEM) were used to investigate the flow of corn-shaped particles in a cylindrical spouted bed with a conical base. The particle motion was modeled by the DEM, and the gas motion by the k-ε two-equation turbulent model. A two-way coupling numerical iterative scheme was used to incorporate the effects of gas-particle interactions in terms of momentum exchange. The corn-shaped particles were constructed by a multisphere method. Drag force, contact force, Saffman lift force, Magnus lift force, and gravitational force acting on each individual particle were considered in establishing the mathematical modeling. Calculations were carried out in a cylindrical spouted bed with an inside diameter of 200 mm, a height of 700 mm, and a conical base of 60 . Comparison of simulations with experiments showed the availability of the multi-sphere method in simulating spouting action with corn-shaped particles, but it depended strongly on the number and the arrangement of the spherical elements. Gas-solid flow patterns, pressure drop, particle velocity and particle concentration at various spouting gas velocity were discussed. The results showed that particle velocity reaches a maximum at the axis and then decreases gradually along the radial direction in the whole bed. Particle concentration increases along the radial direction in the spout region but decreases in the fountain region, while it is nearly constant in the annulus region. Increasing spouting gas velocity leads to larger pressure drop, remarkably increased speed of particle moving upward or downward, but decreased particle concentration. | Bing Ren Wenqi Zhong Yu Chen Xi Chen Baosheng Jin Zhulin Yuan Yong Lu | 2012 | Particuology2012，10，5： | 17 |
| 3 | Research and Development of Supercritical Carbon Dioxide Coal-Fired Power Systems显示文摘Using supercritical carbon dioxide(S-CO2)Brayton cycle instead of the traditional steam Rankine cycle is a promising technique to enhance the coal-fired power generation efficiency.Researchers from all over the world are actively designing and exploring efficient S-CO2 coal-fired power plants in recent years with great efforts made to overcome the significant technical challenges in the cycle layouts of S-CO2 and its specific thermal integration with coal-fired heat resources.This paper provides a detailed review of the research progress on the coal-fired power generation using S-CO2 Brayton cycles.The basic knowledge of S-CO2 properties,the promising S-CO2 power cycles and the conceptual designs for S-CO2 coal-fired power plants are comprehensively summarized,with some key issues in the constructing process and the corresponding engineering solutions being emphatically discussed.Based on the current achievements,the overall technical and economic evaluations on the S-CO2 coal-fired power system are figured out.Furthermore,the specific integration applications of S-CO2 cycles with different coal firing devices and modes including pulverized coal combustion,circulating fluidized bed combustion,oxy-coal combustion,pressurized fluidized bed combustion,chemical looping combustion are discussed.Finally,the main challenges requiring further studies are highlighted. | LI Zhaozhi LIU Xuejiao SHAO Yingjuan ZHONG Wenqi | 2020 | Journal of Thermal Science2020，29，3： | 9 |
| 4 | Flow Behaviors of Non-spherical Granules in Rectangular Hopper显示文摘Flow behaviors of four kinds of granular particles(i.e. sphere,ellipsoid,hexahedron and binary mixture of sphere and hexahedron) in rectangular hoppers were experimentally studied. The effects of granular shape and hopper structure on flow pattern,discharge fraction,mean particle residence time and tracer concentration distribu-tion were tested based on the visual observation and particle tracer technique. The results show that particle shape affects significantly the flow pattern. The flow patterns of sphere,ellipsoid and binary mixture are all parabolic shape,and the flow pattern shows no significant difference with the change of wedge angle. The flowing zone be-comes more sharp-angled with the increasing outlet size. The flow pattern of hexahedron is featured with straight lines. The discharge rates are in increasing order from hexahedron,sphere,binary mixture to ellipsoid. The dis-charge rate also increases with the wedge angle and outlet size. The mean particle residence time becomes shorter when the outlet size increases. The difference of mean particle residence time between the maximum and minimum values decreases as the wedge angle increases. The residence time of hexahedron is the shortest. The tracer concen-tration distribution of hexahedron at any height is more uniform than that of binary mixture. The tracer concentra-tion of sphere in the middle is lower than that near the wall,and the contrary tendency is found for ellipsoid particles. | JIN Baosheng TAO He ZHONG Wenqi | 2010 | Chinese Journal of Chemical Engineering2010，18，6： | 7 |
| 5 | Production of Two Elite Glutinous Rice Varieties by Editing Wx Gene显示文摘The waxy gene(Wx) in rice, which encodes the granule bound starch synthase enzyme, is responsible for amylose synthesis. Glutinous(sticky) rice has little or no amylose that can be used in various applications, such as brewing. In this study, knockout of the Wx gene with CRISPR/Cas9 technology was conducted in two elite japonica rice lines, Huaidao 5(HD5) and Suken 118(SK118), aiming to develop elite sticky rice varieties. We achieved six homozygous T_0 plants with more than 200 bp deletion in the Wx gene, as well as 36 wx-HD5 and 18 wx-SK118 homozygous transgene-free plants in the T_1 generation. The seeds of all the mutants were white and opaque, similar to those of sticky rice, and contained only 2.6%–3.2% amylose. Results of scanning electron microscopy showed that the quality of rice did not change. In conclusion, we successfully developed two elite sticky rice varieties. | FEI Yunyan YANG Jie WANG Fangquan FAN Fangjun LI Wenqi WANG Jun XU Yang ZHU Jinyan ZHONG Weigong | 2019 | Rice science2019，26，2： | 6 |
| 6 | Characteristic and mercury adsorption of activated carbon produced by CO_2 of chicken waste显示文摘从鸡废物的活性炭的准备是为 Hg 移动生产有用吸附物的一个有希望的方法。一个三阶段的激活过程(在 200 ° C 弄干,在 N2 空气的热分解,由 CO2 激活列在后面) 被用于激活的样品的生产。碳化温度(400 600 ° C ) 的效果,激活温度(700 900 ° C ) ,和准备的碳的物理化学的性质(重量损失和赌注表面) 上的激活时间(1 2.5 h ) 被调查。从真实烟道气体的水银的吸附的移动被学习了到活性炭上。从鸡废物的活性炭作为商业活性炭(Darco LH ) 有一样的水银能力(Hgv:38.7% 对 53.5% , Hg0:50.5% 对 68.8%) 尽管它的表面区域小约 10 倍, 89.5 m2/g 对 862 m2/g。低费用活性炭能从鸡废物被生产,并且过程是合适的。 | HUANG Yaji JIN Baosheng ZHONG Zhaoping ZHONG Wenqi XIAO Rui | 2008 | Journal of Environmental Sciences2008，20，3： | 5 |
| 7 | Seasonal Cumulative Effect of Ural Blocking Episodes on the Frequent Cold events in China during the Early Winter of 2020/21显示文摘Starting in mid-November,China was hit by several cold events during the early winter of 2020/21.The lowest temperature observed at Beijing station on 7 January reached−19.6°C.In this paper,we show that the outbreak of the record-breaking extreme cold event can be attributed to a huge merging Ural blocking(UB)ridge over the Eurasian region.The sea-ice cover in the Kara and East Siberia Seas(KESS)in autumn was at its lowest value since 1979,which could have served as a precursor signal.Further analysis shows that several successive UB episodes occurred from 1 September 2020 to 10 January 2021.The persistent UB that occurred in late September/early October 2020 may have made an important contribution to the October historical minimum of sea ice in the KESS region.Our results also show that,after each UB episode in winter,significant upward propagation of wave activity occurred around 60°E,which resulted in weakening the stratospheric vortex.Meanwhile,each UB episode also caused a significant reduction in sea-ice extent in KESS and a significant weakening of the westerly jet in mid-high-latitude Eurasia.Results suggest that the Arctic vortex,which is supposed to enhance seasonally,became weaker and more unstable than the climatic mean under the seasonal cumulative effects of UB episodes,KESS warming,and long-lasting negative-phase North Atlantic Oscillation(NAO-).Those seasonal cumulative effects,combined with the impact of La Niña winter,led to the frequent occurrence of extreme cold events. | Yao YAO Wenqi ZHANG Dehai LUO Linhao ZHONG Lin PEI | 2022 | Advances in Atmospheric Sciences2022，39，4： | 4 |
| 8 | Experimental-computational study of fibrous particle transport and deposition in a bifurcating lung model显示文摘 | Xiaole Chen Wenqi Zhong Josin Tom Clement Kleinstreuer Yu Feng Xiaopu He | 2016 | Particuology2016，14，5： | 3 |
| 9 | System Analysis on Supercritical CO_2 Power Cycle with Circulating Fluidized Bed Oxy-Coal Combustion显示文摘Supercritical carbon dioxide(S-CO_2) Brayton power cycle is a competitive technology to achieve high efficiency in a variety of applications. However, in coal power applications, the CO_2 generated from coal combustion still discharges into the atmosphere causing a series of environment problems. In this work, an 300 MWe S-CO_2 power cycle with circulating fluidized bed(CFB) oxy-coal combustion was established including air separation unit(ASU), CFB boiler, recuperator system and carbon dioxide compression and purification unit(CPU). Based on the material and energy conservation, the cycle efficiency of S-CO_2(620°C, 25 MPa) Brayton power cycle with CFB oxy-coal combustion is evaluated compared to the oxy-coal combustion steam Rankine cycle and S-CO_2 Brayton power cycle with the 31.65 kg/s coal supply. After that, the influence of several factors, e.g., exhaust flue gas temperature, split ratio in recuperator system and the oxygen supply on the cycle efficiency was investigated and analyzed. The results show that the net efficiency of S-CO_2 power cycle with CFB oxy-coal combustion(32.67%) is much higher than the steam Rankine cycle utilizing CFB with 17.5 Mpa, 540°C steam(27.3%), and 25 Mpa, 620°C steam(30.15%) under the same exhaust flue gas temperature. In addition, lower exhaust flue gas temperature and higher split ratio are preferred to achieve higher cycle efficiency. Lower oxygen supply can reduce the energy consumption of ASU and CPU, further increasing the system net efficiency. However, the energy losses of ASU and CPU are still very large in oxy-coal combustion and need to be improved in further work. | SHI Yan ZHONG Wenqi SHAO Yingjuan XIANG Jun | 2019 | Journal of Thermal Science2019，28，3： | 3 |
| 10 | Study on the emission characteristics of nitrogen oxides with coal combustion in pressurized fluidized bed显示文摘Nitrogen oxides are one of the most significant pollution sources during coal combustion. This experimental study was conducted in a 15 kWth lab-scale pressurized fluidized bed (inner diameter = 81-100 mm, H = 2100 mm) firing with bituminous coals. The effects of operating parameters, including bed temperature (800℃-900℃), operating pressure (0.1-0.4 MPa), excess air level (16%-30%) and flow pattern on NOX and N2O emissions were systematically studied during the tests. During each test the interaction effects of all the operating parameters were properly controlled. The results show that most operating parameters have an opposite effect on NOX and N2O emissions, and the N2O emissions mainly depend on the bed temperature. Increasing the operating pressure can significantly suppress the fuel-N conversion to NOX but enhance its conversion to N2O. With the rise of the excess air level and fluidization number, NOX emissions grow distinctly while N2O emissions remain almost unchanged. Total nitrogen oxide emissions increase with the bed temperature while decrease with the operating pressure. | Zheng Gong Yingjuan Shao Lei Pang Wenqi Zhong Chao Chen | 2019 | Chinese Journal of Chemical Engineering2019，27，5： | 2 |
| 11 | Experiments on particle cluster behaviors in a fast fluidized bed显示文摘A three-dimensional(3D) fast fluidized bed with the riser of 3.0 m in height and 0.1 m in inner diameter was established to experimentally study the cluster behaviors of Geldart B particles. Five kinds of quartz sand particles(dp= 0.100, 0.139, 0.177, 0.250 and 0.375 mm and ρp= 2480 kg·m^(-3)) were respectively investigated, with the total mass of the bed material kept as 10 kg. The superficial gas velocity in the riser ranges from 2.486 to 5.594 m·s^(-1) and the solid mass flux alters from 30 to 70 kg·((m^(-2)·s))^(-1). Cluster characteristics and evolutionary processes in the different positions of the riser were captured by the cluster visualization systems and analyzed by the self-developed binary image processing. The results found four typical cluster structures in the riser,i.e., the macro stripe-shaped cluster, saddle-shaped cluster, U-shaped cluster and the micro cluster. The increasing superficial gas velocity and particle sizes result in the increasing average cluster size and the decreasing cluster time fraction, while the solid mass flux in the riser have the reverse influences on the cluster size and time fraction. Additionally, clusters in the upper region of the riser often have the larger size and time fraction than that in the lower region. All these effects of operating conditions on clusters become less obvious when particle size is less than 0.100 mm. | Dailin Chen Xuejiao Liu Ziwen Sun Wenqi Zhong Baosheng Jin | 2017 | Chinese Journal of Chemical Engineering2017，25，9： | 2 |
| 12 | Flow behavior of non-spherical particle flowing in hopper显示文摘流动在 hopper 的椭圆体的粒子被使用分离元素方法(DEM ) 模仿,并且由多元素方法描述了。为在 hopper 的椭圆体的粒子运动的接触察觉算法和方程被开发。并且模拟结果被实验证实。另外,集体流动率,压力分发和二种粒子的速度分发被检验。结果证明椭圆体的粒子的集体流动率比球形的粒子的小。有在连接的顶的压力落下的最大的价值。而且,压力落下减少,排出的时间增加。球形的粒子的速度比的大椭圆体。 | He TAO Wenqi ZHONG Baosheng JIN | 2014 | Frontiers in Energy2014，8，3： | 2 |
| 13 | Dynamic optimization oriented modeling and nonlinear model predictive control of the wet limestone FGD system显示文摘Nonlinear model predictive control(NMPC)scheme is an effective method of multi-objective optimization control in complex industrial systems.In this paper,a NMPC scheme for the wet limestone flue gas desulphurization(WFGD)system is proposed which provides a more flexible framework of optimal control and decision-making compared with PID scheme.At first,a mathematical model of the FGD process is deduced which is suitable for NMPC structure.To equipoise the model’s accuracy and conciseness,the wet limestone FGD system is separated into several modules.Based on the conservation laws,a model with reasonable simplification is developed to describe dynamics of different modules for the purpose of controller design.Then,by addressing economic objectives directly into the NMPC scheme,the NMPC controller can minimize economic cost and track the set-point simultaneously.The accuracy of model is validated by the field data of a 1000 MW thermal power plant in Henan Province,China.The simulation results show that the NMPC strategy improves the economic performance and ensures the emission requirement at the same time.In the meantime,the control scheme satisfies the multiobjective control requirements under complex operation conditions(e.g.,boiler load fluctuation and set point variation).The mathematical model and NMPC structure provides the basic work for the future development of advanced optimized control algorithms in the wet limestone FGD systems. | Lukuan Yang Wenqi Zhong Li Sun Xi Chen Yingjuan Shao | 2020 | Chinese Journal of Chemical Engineering2020，28，3： | 2 |
| 14 | DEM simulation of gas-solid flow behaviors in spout-fluid bed显示文摘 | Zhong Wenqi Xiong Yuanquan Yuan Zhulin | 2006 | Chemical Engineering Science2006，61，5： | 1 |
| 15 | Modeling on the hydrodynamics of a high-flux circulatingfluidized bed with Geldart group aparticles by kinetic theoryof granular flow显示文摘 | Wang Xiaofang Jin Baosheng Zhong Wenqi Xiao Rui | 2009 | Energy Fuels2009，24，2： | 1 |
| 16 | Hydrodynamic characteristics of spout-fluid bed: Pressure drop and minimum spouting/spout-fluidizing velocity 显示文摘 | Zhong Wenqi Chen Xiaoping Zhang Mingyao | 2006 | Chemical Engineering Journal2006，118，1： | 1 |
| 17 | Hydrodynamic characteristics of spout-fluid bed: pressure drop and minimum spouting/spout- fluidizing velocity显示文摘 | Zhong Wenqi Chen Xiaoping Zhang Mingyao | 2006 | Chemical Engineering Journal2006，118，： | 1 |
| 18 | Modeling and experimental study on multi-level humidifying of the underfeed circulating spouted bed for flue gas desulfurization 显示文摘 | Min Tao Baosheng Jin Wenqi Zhong | 2010 | Powder Technology2010，198，： | 1 |
| 19 | Pressure fluctuation frequency characteristics in a spout-fluid bed by modern ARM power spectrum analysis显示文摘 | Zhong Wenqi Zhang Mingyao | 2005 | Powder Technology2005，152，3： | 1 |
| 20 | Prediction of Minimum Spouting Velocity of Spouted Bed by CFD- TFM: Scale-Up 显示文摘 | ZHONG Wenqi LIU Xuejiao Grace J R | 2013 | The Canadian Journal of Chemical Engineering2013，91，： | 1 |
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