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Effect of wastewater composition on the calcium carbonate precipitation in upflow anaerobic sludge blanket

Shucheng YANG, Yanling HE, Charles CHOU, Pengxiang ZHANG, Dongqi WANG, Yonghong LIU,

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 2,   Pages 142-149 doi: 10.1007/s11783-010-0026-3

Abstract: Calcium carbonate often precipitates in anaerobic reactors treating wastewater with high calcium contentThe aim of this paper is to study the effect of wastewater composition on calcium carbonate precipitationprecipitation in anaerobic granular sludge, which was expected due to the different methanogens distributionMoreover, the location of calcium carbonate precipitation substantially affected the specific methanogenicprecipitation.

Keywords： calcium carbonate     precipitation     anaerobic granular sludge     wastewater composition     microstructure     upflow    

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Preparation of ultrafine α-AlO using precipitation-azeotropic distillation method

XIAO Jin, QIN Qi, ZHOU Feng, CHEN Yanbin, WAN Ye

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 2,   Pages 226-231 doi: 10.1007/s11465-008-0029-y

Abstract: Ammonium aluminum carbonate hydroxide (AACH) was prepared by a precipitation-azeotropic distillationmethod, which uses aluminum sulfate as the Al source and ammonium carbonate as the precipitant.and well-distributed property can be synthesized only after aluminum sulfate atomizes into ammonium carbonate

Keywords： calcination temperature     spherical     AACH     carbonate hydroxide     ammonium carbonate    

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of vanadium and manganese from high-manganese containing vanadium wastewater by a solvent extraction-precipitation

Zishuai Liu, Yimin Zhang, Zilin Dai, Jing Huang, Cong Liu

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 5,   Pages 902-912 doi: 10.1007/s11705-019-1887-z

Abstract: environmentally friendly method was developed to recover valuable metals by using a solvent extraction-precipitationFor the precipitation process, 91.05% of manganese was recovered as MnCO which meets the III grade standard

Keywords： high-manganese containing vanadium wastewater     solvent extraction     carbonate precipitation     vanadium titano-magnetite    

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Polyethylene glycol-supported ionic liquid as a highly efficient catalyst for the synthesis of propylene carbonate

Rui YAO, Hua WANG, Jinyu HAN

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 3,   Pages 239-245 doi: 10.1007/s11705-012-1297-y

Abstract: The coupling reaction of propylene and CO to form propylene carbonate (PC) was promoted by an ionic

Keywords： ionic liquid     PEG-supported ionic liquid     carbon dioxide     propylene carbonate    

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Modeling radiative effects of haze on summer-time convective precipitation over North China: a case study

Xuying WANG, Bin ZHANG

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 4, doi: 10.1007/s11783-016-0840-3

Abstract: We modeled the impact of haze radiative effects on precipitation in North China.Convection was the key factor that whether precipitation was enhanced or suppressed.Precipitation was often suppressed where CAPE, RH and updraft velocities were high.The convection was stronger over places with precipitation enhancement over 30 mm.water vapor to rise to a higher level and thus further suppressed precipitation.

Keywords： Haze     Aerosol radiative effects     Convective precipitation    

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Changes in hourly precipitation may explain the sharp reduction of discharge in the middle reach of the

Lin LUO, Zhongjing WANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 5,   Pages 756-768 doi: 10.1007/s11783-013-0563-7

Abstract: High temporal resolution precipitation (timescales between 1 and 4 h) data from the June to Septemberand significance of monotonic trends, and to find the change points in the mean and variance of the precipitationResults show that although the total amount of precipitation has slightly increased, the average rainfallThe study indicates that changes in hourly precipitation may be responsible for the sharp reduction of

Keywords： precipitation intensity     Mann-Kendall rank statistic     spatial and temporal distribution     climatic change    

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Novel eco-efficient reactive distillation process for dimethyl carbonate production by indirect alcoholysis

Iulian Patraşcu, Costin S. Bîldea, Anton A. Kiss

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 2,   Pages 316-331 doi: 10.1007/s11705-021-2047-9

Abstract: Dimethyl carbonate is an eco-friendly essential chemical that can be sustainably produced from CO , whichThe rapid increase in dimethyl carbonate demand is driven by the fast growth of polycarbonates, solventDimethyl carbonate can be produced from CO through various chemical pathways, but the most convenientTherefore, less equipment is required, the methanol-dimethyl carbonate azeotrope does not need to beThe energy requirement is reduced by heat integration to just 1.25 kW·h·kg dimethyl carbonate, which

Keywords： dimethyl carbonate     reactive distillation     process design     plantwide control    

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Inspection System of Carbonate Equilibrium for Groundwater

Liu Jiangang,Zheng Kexun,Fu Weining,Wu Shunhua

Strategic Study of CAE 2003, Volume 5, Issue 9,   Pages 61-64

Abstract:

The paper discusses the relationship between three forms of carbonate as H2C03carbonateSo features of carbonate equilibrium in carbonate rock depend on component of calcite.

Keywords： carbonate rock     groundwater     carbonate equilibrium     pH value    

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Multi-objective optimization of molten carbonate fuel cell system for reducing CO

Ramin ROSHANDEL,Majid ASTANEH,Farzin GOLZAR

Frontiers in Energy 2015, Volume 9, Issue 1,   Pages 106-114 doi: 10.1007/s11708-014-0341-7

Abstract: The aim of this paper is to investigate the implementation of a molten carbonate fuel cell (MCFC) as

Keywords： molten carbonate fuel cell (MCFC)     multi-objective optimization (MOO)     Pareto curve     genetic algorithm     CO    

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Effect of potassium carbonate on catalytic synthesis of calcium carbide at moderate temperature

Dejun SHI, Ke QIAO, Zifeng YAN

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 3,   Pages 372-375 doi: 10.1007/s11705-010-0570-1

Abstract: The effect of potassium carbonate as additive on the composition and morphology of the product was investigatedAddition of potassium carbonate increased the yield of calcium carbide.The sample in the presence of potassium carbonate generated acetylene gas of 168.3 L/kg, which was 10%higher than that in the absence of potassium carbonate.This result confirmed the catalytic effect of potassium carbonate on the synthesis of calcium carbide

Keywords： calcium carbide     synthesis     catalysis    

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Influence of crystalline phase of Li-Al-O oxides on the activity of Wacker-type catalysts in dimethyl carbonate

Yadong GE, Yuanyuan DONG, Shengping WANG, Yujun ZHAO, Jing LV, Xinbin MA

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 4,   Pages 415-422 doi: 10.1007/s11705-012-1214-4

Abstract: The catalysts supported on LiAl O (spinel) for vapor phase synthesis of dimethyl carbonate (DMC) from

Keywords： Wacker-type catalyst     dimethyl carbonate     methyl nitrite     spinel    

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Direct synthesis of diphenyl carbonate over heterogeneous catalyst: effects of structure of substituted

WU Guangwen, JIN Fang, WU Yuxin, ZHANG Guangxu, LI Dinghuo, WANG Cunwen, MA Peisheng

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 1,   Pages 59-64 doi: 10.1007/s11705-007-0012-x

Abstract: Active component Pd was loaded on various perovskite supports for synthesis of diphenyl carbonate.

Keywords： photoelectron spectroscopy     diphenyl carbonate     proportion     diffraction     perovskite    

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Evaluation of precipitation behavior of zirconium molybdate hydrate

Liang ZHANG, Masayuki TAKEUCHI, Tsutomu KOIZUMI, Izumi HIRASAWA

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 1,   Pages 65-71 doi: 10.1007/s11705-013-1314-9

Abstract: In the dissolution step of spent nuclear fuel, there is a world-concern problem that zirconium molybdate hydrate precipitates as a byproduct, and accumulates in some reprocessing equipments. In order to prevent this accumulation, we have developed a new method based on the controlled reaction crystallization of zirconium molybdate hydrate (ZMH) in the reprocessing solution, followed by solid liquid separation. In order to measure the particle size of ZMH, batch crystallization experiments were conducted by varying nitric acid concentration and operating temperature. In result, almost all particle sizes scatter around 1 μm on average, despite the higher concentration of nitric aid and operating temperature, and then small particles grow up as an aggregate sticking to the crystallizer. Moreover, polymorph and color changing were observed by varying the concentration of nitric acid and reaction time. These results suggest that crystal color and adhesiveness are closely related to the particle size of ZMH. And the control of nitric acid concentration and small particle growth would be the useful technique to prevent the ZMH sticking.

Keywords： spent nuclear fuel     zirconium molybdate hydrate     cleaning method     accumulation    

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Alkali-silica Reaction and Alkali-carbonate Reaction

Tang Mingshu

Strategic Study of CAE 2000, Volume 2, Issue 1,   Pages 34-40

Abstract: Alkali-aggregate reaction (AAR) may be divided into two kinds： alkali-silica reaction (ASR) and alkali-carbonateIn addition, the geological conditions of formation of reactive carbonate rock were studied, which willbe very beneficial to confirm the distribution of reactive carbonate rocks in a region or in a country

Keywords： alkali     aggregate     silica     carbonate     concrete deterioration     mechanism    

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LiFePO/C cathode materials synthesized by co-precipitation and microwave heating

XU Yunlong, TAO Lili, MA Hongyan, HUANG Huaqing

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 4,   Pages 422-427 doi: 10.1007/s11705-008-0082-4

Abstract: LiFePO/C cathode materials were synthesized by a combination of co-precipitation and microwave heating

Keywords： polyethylene     electrochemical performance     combination     co-precipitation     diffraction    

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Title Author Date Type Operation

Effect of wastewater composition on the calcium carbonate precipitation in upflow anaerobic sludge blanket

Shucheng YANG, Yanling HE, Charles CHOU, Pengxiang ZHANG, Dongqi WANG, Yonghong LIU,

Journal Article

Preparation of ultrafine α-AlO using precipitation-azeotropic distillation method

XIAO Jin, QIN Qi, ZHOU Feng, CHEN Yanbin, WAN Ye

Journal Article

of vanadium and manganese from high-manganese containing vanadium wastewater by a solvent extraction-precipitation

Zishuai Liu, Yimin Zhang, Zilin Dai, Jing Huang, Cong Liu

Journal Article

Polyethylene glycol-supported ionic liquid as a highly efficient catalyst for the synthesis of propylene carbonate

Rui YAO, Hua WANG, Jinyu HAN

Journal Article

Modeling radiative effects of haze on summer-time convective precipitation over North China: a case study

Xuying WANG, Bin ZHANG

Journal Article

Changes in hourly precipitation may explain the sharp reduction of discharge in the middle reach of the

Lin LUO, Zhongjing WANG

Journal Article

Novel eco-efficient reactive distillation process for dimethyl carbonate production by indirect alcoholysis

Iulian Patraşcu, Costin S. Bîldea, Anton A. Kiss

Journal Article

Inspection System of Carbonate Equilibrium for Groundwater

Liu Jiangang,Zheng Kexun,Fu Weining,Wu Shunhua

Journal Article

Multi-objective optimization of molten carbonate fuel cell system for reducing CO

Ramin ROSHANDEL,Majid ASTANEH,Farzin GOLZAR

Journal Article

Effect of potassium carbonate on catalytic synthesis of calcium carbide at moderate temperature

Dejun SHI, Ke QIAO, Zifeng YAN

Journal Article

Influence of crystalline phase of Li-Al-O oxides on the activity of Wacker-type catalysts in dimethyl carbonate

Yadong GE, Yuanyuan DONG, Shengping WANG, Yujun ZHAO, Jing LV, Xinbin MA

Journal Article

Direct synthesis of diphenyl carbonate over heterogeneous catalyst: effects of structure of substituted

WU Guangwen, JIN Fang, WU Yuxin, ZHANG Guangxu, LI Dinghuo, WANG Cunwen, MA Peisheng

Journal Article

Evaluation of precipitation behavior of zirconium molybdate hydrate

Liang ZHANG, Masayuki TAKEUCHI, Tsutomu KOIZUMI, Izumi HIRASAWA

Journal Article

Alkali-silica Reaction and Alkali-carbonate Reaction

Tang Mingshu

Journal Article

LiFePO/C cathode materials synthesized by co-precipitation and microwave heating

XU Yunlong, TAO Lili, MA Hongyan, HUANG Huaqing

Journal Article