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| 1 | Mercury removal from coal combustion flue gas by modified fly ash显示文摘Fly ash is a potential alternative to activated carbon for mercury adsorption. The effects of physicochemical properties on the mercury adsorption performance of three fly ash samples were investigated. X-ray fluorescence spectroscopy, X-ray photoelectron spectroscopy, and other methods were used to characterize the samples. Results indicate that mercury adsorption on fly ash is primarily physisorption and chemisorption. High specific surface areas and small pore diameters are beneficial to efficient mercury removal. Incompletely burned carbon is also an important factor for the improvement of mercury removal efficiency, in particular. The C-M bond, which is formed by the reaction of C and Ti, Si and other elements, may improve mercury oxidation. The samples modified with CuBr2 , CuCl 2 and FeCl3 showed excellent performance for Hg removal, because the chlorine in metal chlorides acts as an oxidant that promotes the conversion of elemental mercury (Hg0) into its oxidized form (Hg2+). Cu2+ and Fe3+ can also promote Hg 0 oxidation as catalysts. HCl and O2 promote the adsorption of Hg by modified fly ash, whereas SO2 inhibits the Hg adsorption because of competitive adsorption for active sites. Fly ash samples modified with CuBr2 , CuCl2 and FeCl3 are therefore promising materials for controlling mercury emissions. | Wenqing Xu Hairui Wang Tingyu Zhu Junyan Kuang Pengfei Jing | 2013 | Journal of Environmental Sciences2013，25，2： | 39 |
| 2 | Agriculture Green Development: a model for China and the world显示文摘Realizing sustainable development has become a global priority.This holds,in particular,for agriculture.Recently,the United Nations launched the Sustainable Development Goals(SDGs),and the Nineteenth National People’s Congress has delivered a national strategy for sustainable development in China—realizing green development.The overall objective of Agriculture Green Development(AGD)is to coordinate'green'with'development'to realize the transformation of current agriculture with high resource consumption and high environmental costs into a green agriculture and countryside with high productivity,high resource use efficiency and low environmental impact.This is a formidable task,requiring joint efforts of government,farmers,industry,educators and researchers.The innovative concept for AGD will focus on reconstructing the whole crop-animal production and food production-consumption system,with the emphasis on high thresholds for environmental standards and food quality as well as enhanced human well-being.This paper addresses the significance,challenges,framework,pathways and potential solutions for realizing AGD in China,and highlights the potential changes that will lead to a more sustainable agriculture in the future.Proposals include interdisciplinary innovations,whole food chain improvement and regional solutions.The implementation of AGD in China will provide important implications for the countries in developmental transition,and contribute to global sustainable development. | Jianbo SHEN Qichao ZHU Xiaoqiang JIAO Hao YING Hongliang WANG Xin WEN Wen XU Tingyu LI Wenfeng CONG Xuejun LIU Yong HOU Zhenling CUI Oene OENEMA William JDAVIES Fusuo ZHANG | 2020 | Frontiers of Agricultural Science and Engineering2020，7，1： | 18 |
| 3 | Regeneration performance and carbon consumption of semi-coke and activated coke for SO_2 and NO removal显示文摘To decrease the operating cost of flue gas purification technologies based on carbon-based materials, the adsorption and regeneration performance of low-price semi-coke and activated coke were compared for SO2 and NO removal in a simulated flue gas. The functional groups of the two adsorbents before and after regeneration were characterized by a Fourier transform infrared(FTIR) spectrometer, and were quantitatively assessed using temperature programmed desorption(TPD) coupled with FTIR and acid–base titration. The results show that semi-coke had higher adsorption capacity(16.2% for SO2 and 38.6% for NO) than activated coke because of its higher content of basic functional groups and lactones. After regeneration, the adsorption performance of semi-coke decreased because the number of active functional groups decreased and the micropores increased. Semi-coke had better regeneration performance than activated coke. Semi-coke had a larger SO2 recovery of 7.2% and smaller carbon consumption of 12% compared to activated coke. The semi-coke carbon-based adsorbent could be regenerated at lower temperatures to depress the carbon consumption, because the SO2 recovery was only reduced a small amount. | Song Ding Yuran Li Tingyu Zhu Yangyang Guo | 2015 | Journal of Environmental Sciences2015，27，8： | 17 |
| 4 | Haze insights and mitigation in China: An overview显示文摘The present article provides an overview of the chemical and physical features of haze in China, focusing on the relationship between haze and atmospheric fine particles, and the formation mechanism of haze. It also summarizes several of control technologies and strategies to mitigate the occurrence of haze. The development of instruments and the analysis of measurements of ambient particles and precursor concentrations have provided important information about haze formation. Indeed, the use of new instruments has greatly facilitated current haze research in China. Examples of insightful results include the relationship between fine particles and haze, the chemical compositions and sources of particles, the impacts of the aging process on haze formation, and the application of technologies that control the formation of haze. Based on these results, two relevant issues need to be addressed: understanding the relationship between haze and fine particles and understanding how to control PM2.5. | Xuliang Zhuang Yuesi Wang Hong He Jianguo Liu Xinming Wang Tingyu Zhu Maofa Ge Ju Zhou Guiqian Tang Jinzhu Ma | 2014 | Journal of Environmental Sciences2014，26，1： | 12 |
| 5 | Adsorption and desorption of SO_2, NO and chlorobenzene on activated carbon显示文摘Activated carbon(AC) is very effective for multi-pollutant removal; however, the complicated components in flue gas can influence each other's adsorption. A series of adsorption experiments for multicomponents, including SO_2, NO, chlorobenzene and H2 O,on AC were performed in a fixed-bed reactor. For single-component adsorption, the adsorption amount for chlorobenzene was larger than for SO_2 and NO on the AC. In the multi-component atmosphere, the adsorption amount decreased by 27.6% for chlorobenzene and decreased by 95.6% for NO, whereas it increased by a factor of two for SO_2,demonstrating that a complex atmosphere is unfavorable for chlorobenzene adsorption and inhibits NO adsorption. In contrast, it is very beneficial for SO_2 adsorption. The temperature-programmed desorption(TPD) results indicated that the binding strength between the gas adsorbates and the AC follows the order of SO_2> chlorobenzene > NO. The adsorption amount is independent of the binding strength. The presence of H2 O enhanced the component effects, while it weakened the binding force between the gas adsorbates and the AC. AC oxygen functional groups were analyzed using TPD and X-ray photoelectron spectroscopy(XPS) measurements. The results reveal the reason why the chlorobenzene adsorption is less affected by the presence of other components. Lactone groups partly transform into carbonyl and quinone groups after chlorobenzene desorption. The chlorobenzene adsorption increases the number of C = O groups, which explains the positive effect of chlorobenzene on SO_2 adsorption and the strong NO adsorption. | Yuran Li Yangyang Guo Tingyu Zhu Song Ding | 2016 | Journal of Environmental Sciences2016，28，5： | 8 |
| 6 | Gas-phase and particle-phase PCDD/F congener distributions in the flue gas from an iron ore sintering plant显示文摘The activated carbon injection-circulating fluidized bed(ACI-CFB)-bag filter coupling technique was studied in an iron ore sintering plant. For comparison, the removal efficiencies under the conditions without or with ACI technology were both evaluated. It was found that the polychlorinated dibenzo-p-dioxins and dibenzofuran(PCDD/F) removal efficiency for total international toxic equivalence quantity(I-TEQ) concentration was improved from 91.61% to 97.36% when ACI was employed, revealing that ACI was very conducive to further controlling the PCDD/F emissions. Detailed congener distributions of PCDD/Fs in the gas-phase and particle-phase of the Inlet and Outlet samples were determined. Additionally, the PCDD/F distribution for the Fly ash-with ACI sample of was also studied. | Xiaolong Liu Meng Ye Xue Wang Wen Liu Tingyu Zhu | 2017 | Journal of Environmental Sciences2017，29，4： | 8 |
| 7 | O_(3)oxidation combined with semi-dry method for simultaneous desulfurization and denitrification of sintering/pelletizing flue gas显示文摘With the vigorous development of China's iron and steel industry and the introduction of ultra-low emission policies,the emission of pollutants such as SO_(2)and NO x has received unprecedented attention.Considering the increase of the proportion of semi-dry desulfurization technology in the desulfurization process,several semi-dry desulphurization technologies such as flue gas circulating fluidized bed(CFB),dense flow absorber(DFA)and spray drying absorption(SDA)are briefly summarized.Moreover,a method for simultaneous treatment of SO_(2)and NOx in sintering/pelletizing flue gas by O_(3)oxidation combined with semidry method is introduced.Meantime,the effects of key parameters such as O_(3)/NO molar ratio,Ca SO_(3),SO_(2),reaction temperature,Ca/(S+2 N)molar ratio,droplet size and approach to adiabatic saturation temperature(AAST)on denitrification and desulfurization are analyzed.Furthermore,the reaction mechanism of denitrification and desulfurization is further elucidated.Finally,the advantages and development prospects of the new technology are proposed. | Fagao Liu Maoyu Cai Xiaolong Liu Tingyu Zhu Yang Zou | 2021 | Journal of Environmental Sciences2021，33，6： | 8 |
| 8 | Simultaneous removal of SO2 and NO using a spray dryer absorption(SDA) method combined with O3 oxidation for sintering/pelleting flue gas显示文摘Based on the demand of sintering/pelleting flue gas ultra-low emission,a semi-dry method using a spray dryer absorber (SDA) combined with O3 oxidation was proposed for simultaneous removal of SO2 and NO.Effects of O3 injection site,O3/NO molar ratio,and spray tower temperature on the removal efficiencies were investigated.It was revealed that both desulfurization and denitrification efficiencies could reach to 85%under the conditions of setting O3 injection site inside of tower,O3/NO molar ratio 1.8,spray tower temperature 85°C,Ca/(S+2N) molar ratio 2.5 and slurry flow rate 300 m L/hr.CaSO3/Ca(OH)2 mixture slurry was used as absorbent to simulate operating conditions in iron and steel industry.The result shows that the addition of CaSO3 weakens both removal efficiencies.In addition,the reaction mechanism of simultaneous removal of SO2 and NO using SDA combined with O3 oxidation was proposed. | Maoyu Cai Xiaolong Liu Tingyu Zhu Yang Zou Wenliang Tao Mengkui Tian | 2020 | Journal of Environmental Sciences2020，32，10： | 7 |
| 9 | Mechanism of Hg^0 oxidation in the presence of HCl over a commercial V_2O_5–WO_3/TiO_2 SCR catalyst显示文摘Experiments were conducted in a fixed-bed reactor containing a commercial V2O5/WO3/TiO2 catalyst to investigate mercury oxidation in the presence of HCl and O2. Mercury oxidation was improved significantly in the presence of HCl and O2, and the Hg0 oxidation efficiencies decreased slowly as the temperature increased from 200 to 400°C. Upon pretreatment with HCl and O2 at 350°C, the catalyst demonstrated higher catalytic activity for Hg0 oxidation. Notably,the effect of pretreatment with HCl alone was not obvious. For the catalyst treated with HCl and O2, better performance was observed with lower reaction temperatures. The results showed that both HCl and Hg0 were first adsorbed onto the catalyst and then reacted with O2 following its adsorption, which indicates that the oxidation of Hg0 over the commercial catalyst followed the Langmuir–Hinshelwood mechanism. Several characterization techniques, including Hg0temperature-programmed desorption(Hg-TPD) and X-ray photoelectron spectroscopy(XPS), were employed in this work. Hg-TPD profiles showed that weakly adsorbed mercury species were converted to strongly bound species in the presence of HCl and O2. XPS patterns indicated that new chemisorbed oxygen species were formed by the adsorption of HCl, which consequently facilitated the oxidation of mercury. | Ruihui Liu Wenqing Xu Li Tong Tingyu Zhu | 2015 | Journal of Environmental Sciences2015，27，10： | 7 |
| 10 | Evaluation of sulfur trioxide detection with online isopropanol absorption method显示文摘Measurement of the SO_3 concentration in flue gas is important to estimate the acid dew point and to control corrosion of downstream equipment. SO_3 measurement is a difficult question since SO_3 is a highly reactive gas, and its concentration is generally two orders of magnitude lower than the SO_2 concentration. The SO_3 concentration can be measured online by the isopropanol absorption method; however, the reliability of the test results is relatively low. This work aims to find the error sources and to evaluate the extent of influence of each factor on the measurement results. The test results from a SO_3 analyzer showed that the measuring errors are mainly caused by the gas–liquid flow ratio, SO_2 oxidation, and the side reactions of SO_3. The error in the gas sampling rate is generally less than 13%. The isopropanol solution flow rate decreases 3% to 30% due to the volatilization of isopropanol, and accordingly, this will increase the apparent SO_3 concentration. The amount of SO_2 oxidation is linearly related to the SO_2 concentration. The side reactions of SO_3 reduce the selectivity of SO_4^(2-) to nearly 73%. As sampling temperature increases from180 to 300°C, the selectivity of SO_4^(2-) decreases from 73% to 50%. The presence of H2 O in the sample gas helps to reduce the measurement error by inhibiting the volatilization of the isopropanol and weakening side reactions. A formula was established to modify the displayed value, and the measurement error was reduced from 25%–54% to less than 15%. | Jin Xiong Yuran Li Jian Wang Yang Yang Tingyu Zhu | 2018 | Journal of Environmental Sciences2018，30，10： | 6 |
| 11 | Simulation and experimental investigation on a dynamic lateral flow mode in trepanning electrochemical machining显示文摘An appropriate flow mode of electrolyte has a positive effect on process efficiency, surface roughness, and machining accuracy in the electrochemical machining(ECM) process. In this study, a new dynamic lateral flow mode, in which the electrolyte flows from the leading edge to the trailing edge, was proposed in trepanning ECM of a diffuser. Then a numerical model of the channel was set up and simulated by using computational fluid dynamics software. The result showed that the distribution of the flow field was comparatively uniform in the inter-electrode gap. Furthermore, a fixture was designed to realize this new flow mode and then corresponding experiments were carried out. The experimental results illustrated that the feeding rate of the cathode reached 2 mm/min, the best taper angle was about 0.4°, and the best surface roughness was up to Ra= 0.115 lm. It reflects that this flow mode is suitable and effective, and can also be applied to machining other complex structures in trepanning ECM. | Dong ZHU Zhouzhi GU Tingyu XUE Ao LIU | 2017 | Chinese Journal of Aeronautics2017，30，4： | 5 |
| 12 | Role of NO in Hg^0 oxidation over a commercial selective catalytic reduction catalyst V_2O_5–WO_3/TiO_2显示文摘Experiments were conducted in a fixed-bed reactor that contained a commercial catalyst,V_2O_5–WO_3/TiO_2,to investigate mercury oxidation in the presence of NO and O_2.Mercury oxidation was improved by NO,and the efficiency was increased by simultaneously adding NO and O_2.With NO and O_2 pretreatment at 350°C,the catalyst exhibited higher catalytic activity for Hg^0 oxidation,whereas NO pretreatment did not exert a noticeable effect.Decreasing the reaction temperature boosted the performance of the catalyst treated with NO and O_2.Although NO promoted Hg^0 oxidation at the very beginning,excessive NO counteracted this effect.The results show that NO plays different roles in Hg^0oxidation; NO in the gaseous phase may directly react with the adsorbed Hg^0,but excessive NO hinders Hg^0 adsorption.The adsorbed NO was converted into active nitrogen species(e.g.,NO_2) with oxygen,which facilitated the adsorption and oxidation of Hg^0.Hg^0 was oxidized by NO mainly by the Eley–Rideal mechanism.The Hg^0 temperature-programmed desorption experiment showed that weakly adsorbed mercury species were converted to strongly bound ones in the presence of NO and O_2. | Ruihui Liu Wenqing Xu Li Tong Tingyu Zhu | 2015 | Journal of Environmental Sciences2015，27，12： | 4 |
| 13 | Density functional theory(DFT) studies of vanadium-titanium based selective catalytic reduction(SCR) catalysts显示文摘Based on density functional theory(DFT)and basic structure models,the chemical reactions on the surface of vanadium-titanium based selective catalytic reduction(SCR)denitrification catalysts were summarized.Reasonable structural models(non-periodic and periodic structural models)are the basis of density functional calculations.A periodic structure model was more appropriate to represent the catalyst surface,and its theoretical calculation results were more comparable with the experimental results than a nonperiodic model.It is generally believed that the SCR mechanism where NH3 and NO react to produce N2 and H2 O follows an Eley-Rideal type mechanism.NH2 NO was found to be an important intermediate in the SCR reaction,with multiple production routes.Simultaneously,the effects of H2 O,SO2 and metal on SCR catalysts were also summarized. | Ziwei Zhao Erwei Li Yu Qin Xiaolong Liu Yang Zou Heng Wu Tingyu Zhu | 2020 | Journal of Environmental Sciences2020，32，4： | 4 |
| 14 | Electrochemical trepanning with uniform electrolyte flow around the entire blade profile显示文摘In the traditional machining process for diffusers, blades are easily deformed, and methods suffer from high tool wear and low efficiency. Electrochemical machining(ECM) possesses unique advantages when applied to these difficult-to-machine materials. In the ECM process, theflow field plays a crucial role. Here, an electrolyte flow mode that supplies uniform flow around the entire blade profile was adopted for electrochemical trepanning of diffusers. Various flow rates were employed to obtain the optimal flow field. Simulations were conducted using ANSYS software, and results indicated that increasing the flow rate substantially afforded a more uniform flowfield. A series of experiments was then performed, and results revealed that increasing the flow rate greatly improved both the machining efficiency and the surface quality of the diffusers. The maximum feeding rate of the cathode reached 4 mm/min, the blade taper of the concave part decreased to 0.02, and the blade roughness was reduced to 1.216 lm. The results of this study demonstrated the high feasibility of this method and its potential for machining other complex components for engineering applications. | Dong ZHU Tingyu XUE Xingyan HU Zhouzhi GU | 2019 | Chinese Journal of Aeronautics2019，32，7： | 3 |
| 15 | Hg^0 removal from flue gas over different zeolites modified by Fe Cl_3显示文摘The elemental mercury removal abilities of three different zeolites(Na A, Na X, HZSM-5)impregnated with iron(Ⅲ) chloride were studied on a lab-scale fixed-bed reactor. X-ray diffraction, nitrogen adsorption porosimetry, Fourier transform infrared spectroscopy,X-ray photoelectron spectroscopy, and temperature programmed desorption(TPD) analyses were used to investigate the physicochemical properties. Results indicated that the pore structure and active chloride species on the surface of the samples are the key factors for physisorption and oxidation of Hg0, respectively. Relatively high surface area and micropore volume are beneficial to efficient mercury adsorption. The active Cl species generated on the surface of the samples were effective oxidants able to convert elemental mercury(Hg0)into oxidized mercury(Hg2+). The crystallization of Na Cl due to the ion exchange effect during the impregnation of Na A and Na X reduced the number of active Cl species on the surface, and restricted the physisorption of Hg0. Therefore, the Hg0 removal efficiencies of the samples were inhibited. The TPD analysis revealed that the species of mercury on the surface of Fe Cl3–HZSM-5 was mainly in the form of mercuric chloride(Hg Cl2), while on Fe Cl3–Na X and Fe Cl3–Na A it was mainly mercuric oxide(Hg O). | Hao Qi Wenqing Xu Jian Wang Li Tong Tingyu Zhu | 2015 | Journal of Environmental Sciences2015，27，2： | 2 |
| 16 | Coupling mechanism of activated carbon mixed with dust for flue gas desulfurization and denitrification显示文摘To clarify the effect of coking dust, sintering dust and fly ash on the activity of activated carbon for various industrial flue gas desulfurization and denitrification, the coupling mechanism of the mixed activated carbon and dust was investigated to provide theoretical reference for the stable operation. The results show that coking dust had 34% desulfurization efficiency and 10% denitrification efficiency;correspondingly, sintering dust and fly ash had no obvious desulfurization and denitrification activities. For the mixture of activated carbon and dust, the coking dust reduced the desulfurization and denitrification efficiencies by blocking the pores of activated carbon, and its inhibiting effect on activated carbon was larger than its own desulfurization and denitrification activity. The sintering dust also reduced the desulfurization efficiency on the activated carbon while enhancing the denitrification efficiency. Fly ash blocked the pores of activated carbon and reduced its reaction activity. The reaction activity of coking dust mainly came from the surface functional groups, similar to that of activated carbon. The reaction activity of sintering dust mainly came from the oxidative property of Fe_2O _3, which oxidized NO to NO_2 and promoted the fast selectively catalytic reduction(SCR) of NO to form N_2. Sintering dust was activated by the joint action of activated carbon, and both had a coupling function. Sintering dust enhanced the adsorption and oxidation of NO, and activated carbon further promoted the reduction of NO_x by NH_3;thus, the denitrification efficiency increased by 5%-7% on the activated carbon. | Junxiang Guo Yuran Li Jin Xiong Tingyu Zhu | 2020 | Journal of Environmental Sciences2020，32，12： | 2 |
| 17 | Effect of calcium oxide on pyrolysis of coal in a fluidized bed显示文摘 | ZHU Tingyu ZHANG Shouyu HUANG Jiejie | | 0，，03： | 1 |
| 18 | Anti-inflammatory properties of Fu brick tea water extract contribute to the improvement of diarrhea in mice显示文摘Fu brick tea,a special kind of dark tea fermented dominantly by Eurotium cristatum,is traditionally used for diarrhea therapy in China.However,limited reports are available on the anti-diarrhea of Fu brick tea water extract(FTE)and its potential mechanisms.In the present study,the treatment effects of FTE on the senna-induced diarrhea in mice were investigated.We found that FTE effectively improved diarrhea index and inhibited gut peristalsis.Additionally,histopathological examination revealed that FTE protected the integrity and reduced inflammatory infiltration of the ileum mucosal barrier.Furthermore,FTE significantly decreased the levels of the pro-inflammatory factor 5-hydroxytryptamine(5-HT)and increased the expression of sodium–hydrogen exchanger 3(NHE-3).The association among both intestinal damage and electrolyte balance and inflammation has been reported by many studies.Collectively,our study showed that FTE had anti-diarrhea activity,which may be associated with anti-inflammatory properties. | Xinyue Dai Binggang Ge Mingzhi Zhu Huiwen Wang Tingyu Zeng Zhonghua Liu Donghe Fu | 2022 | Beverage Plant Research2022，2，1： | 1 |
| 19 | STABILITY RADIUS OF NON-SMOOTH PRITCHARD-SALAMON SYSTEMS AND THE ALGEBRAIC RICCATI EQUATION显示文摘The authors discuss the stability radius of the non-smooth Pritchard-Salamon systemsunder structured perturbations.A formula for the stability radius in terms of t he norm of a certaininput-output operator is obtained.Furthermore,the relationship between stability radius and thesolvability of some type of algebraic Riccati equations is given. | Weisheng JIANG Falun HUANG Tingyu ZHU | 2009 | Journal of Systems Science & Complexity2009，22，2： | 1 |
| 20 | Coordinated Control of Fine-Particle and Ozone Pollution by the Substantial Reduction of Nitrogen Oxides显示文摘1.Introduction In recent years,the air quality in China has improved significantly.In many cities,however,the concentration of fine particulate matter(PM_(2.5))remains higher than the secondary-level national ambient air quality standard(NAAQS level-2,35μg·m^(-3),GB3095-2012[1])and much higher than the first-level NAAQS(15μg·m^(-3),GB3095-2012[1])and the World Health Organization(WHO)air quality guidelines(5μg·m^(-3)). | Biwu Chu Yan Ding Xiang Gao Junhua Li Tingyu Zhu Yunbo Yu Hong He | 2022 | Engineering2022，8，8： | 1 |
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