Quantitative approaches for the description of solubilities of inorganic compounds in near-critical and supercritical water

Leusbrock, Ingo; Metz, S.J.; Rexwinkel, Glenn; Versteeg, Geert

doi:10.1016/j.supflu.2008.08.011

Cited by 65 publications

(58 citation statements)

References 63 publications

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“…The decreased solubility of salts in supercritical water is of great interest for industrial applications and scientific work (Leusbrocka et al 2008). When the initial Cu 2+ concentration increased, more Cu 2+ precipitated from the solution to form crystallized copper compounds during the heating and compression of a hydrothermal process.…”

Section: Effect Of Treatment Temperature and Reaction Time On Cu 2+ Rmentioning

confidence: 99%

Co-disposal of Heavy Metals Containing Waste Water and Medical Waste Incinerator Fly Ash by Hydrothermal Process with Addition of Sodium Carbonate: A Case Study on Cu(II) Removal

Jin

Chi

et al. 2009

Water Air Soil Pollut

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Fly ash generated from medical waste incinerator and wastewater produced from electroplating plants contains various hazardous contaminants such as heavy metals and chlorinated organic compounds. The primary goal of this research was to investigate the feasibility of removing heavy metals from wastewater using medical waste incinerator fly ash as the treatment reagent with addition of small amount of sodium carbonate (Na 2 CO 3 ) in a hydrothermal process. Copper (Cu) was used as the model heavy metal contaminant in the process. The results revealed that medical waste incinerator fly ash could effectively stabilize Cu(II) ion from wastewater, the crystal phase and simple substance formed during the treatment played a significant role in the fixation of heavy metals in wastewater and fly ash. The heavy metal leachability of treated ash was also measured after removal process. The co-disposal of Cu-containing wastewater and heavy metals-bearing medical waste incinerator fly ash by hydrothermal treatment with addition of a small amount of Na 2 SO 3 was found promising as an effective way of removing Cu from wastewater. The reutilization feasibility of fly ash and the formation mechanism of copper-containing substances were also discussed in this paper.

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Section: Effect Of Treatment Temperature and Reaction Time On Cu 2+ Rmentioning

confidence: 99%

Co-disposal of Heavy Metals Containing Waste Water and Medical Waste Incinerator Fly Ash by Hydrothermal Process with Addition of Sodium Carbonate: A Case Study on Cu(II) Removal

Jin

Chi

et al. 2009

Water Air Soil Pollut

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“…In order to assess the catalyst poisoning in the gasifier by residual sulfur, the salt concentration at the separator outlet is estimated with the solubility correlation of Leusbrock et al 39 for Na 2 20) in whichc Na2SO4 is the molar fraction of diluted salt,R the ideal gas constant, and T ss , r ss andm the temperature, density and molar weight of the saturated fluid at the separation temperature, respectively. Due to the lack of data for organic mixtures at these conditions, the correlation with respect to the fluid's molar density r ss /m is applied without modification.…”

mentioning

confidence: 99%

Optimal process design for the polygeneration of SNG, power and heat by hydrothermal gasification of waste biomass: Thermo-economic process modelling and integration

Gassner

Vogel

Heyen

et al. 2011

Energy Environ. Sci.

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This paper presents a process model for the polygeneration of Synthetic Natural Gas (SNG), power and heat by catalytic hydrothermal gasification of biomass and biomass wastes in supercritical water. Following a systematic process design methodology, thermodynamic property models and thermoeconomic process models for hydrolysis, salt separation, gasification and the separation of CH 4 , CO 2 , H 2 and H 2 O at high pressure are developed and validated with experimental data. Different strategies for an integrated separation of the crude product, heat supply and energy recovery are elaborated and assembled in a general superstructure. The influence of the process design on the performance is discussed for some representative scenarios that highlight the key aspects of the design. Based on this work, a thermo-economic optimisation will allow for determining the most promising options for the polygeneration of fuel and power depending on the available technology, catalyst lifetime, substrate type and plant scale.

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“…with high ionic strength is encircled completely by water molecules in aqueous systems, so SO 4 2-could not be bound with Mg 2? directly and would form contact ion-pairs (CIPs) to accelerate TSR reactions (Azimi et al 2007;Leusbrock et al 2008). Based on the theory of CIPs, good correlation between the concentration of H 2 S and Mg 2?…”

Section: The Formation Mechanism Of High H 2 S In the Condensate Resementioning

confidence: 99%

Impact of formation water on the generation of H2S in condensate reservoirs: a case study from the deep Ordovician in the Tazhong Uplift of the Tarim Basin, NW China

Jin

Wang

et al. 2017

Pet. Sci.

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A number of condensate reservoirs with high concentrations of H 2 S have been discovered in the deep dolomite reservoirs of the lower Ordovician Yingshan Formation (O 1 y) in the Tazhong Uplift, where the formation water has a high pH value. In the O 1 y reservoir, the concentrations of Mg 2? and SO 4 2-in the formation water are higher than those in the upper Ordovician formation. The concentration of H 2 S in the condensate reservoirs and the concentration of Mg 2? in the formation water correlate well in the O 1 y reservoirs of the Tazhong Uplift, which indicates a presumed thermochemical sulfate reduction (TSR) origin of H 2 S according to the oxidation theory of contact ion-pairs (CIPs). Besides, the pH values of the formation water are positively correlated with the concentration of H 2 S in the condensate reservoirs, which may indicate that high pH might be another factor to promote and maintain TSR. Oil-source correlation of biomarkers in the sulfuretted condensates indicates the Cambrian source rocks could be the origin of condensates. The formation water in the condensate reservoirs of O 1 y is similar to that in the Cambrian; therefore, the TSR of sulfate-CIPs likely occurred in the Cambrian. High H 2 S-bearing condensates are mainly located near the No. 1 Fault and NE-SW strikeslip faults, which are the major migration pathway of deep fluids in the Tazhong Uplift. The redox between sulfateCIPs and hydrocarbons is the generation mechanism of H 2 S in the deep dolomite condensate reservoirs of the Tazhong Uplift. This finding should be helpful to predict the fluid properties of deep dolomite reservoirs.

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Quantitative approaches for the description of solubilities of inorganic compounds in near-critical and supercritical water

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Cited by 65 publications

References 63 publications

Co-disposal of Heavy Metals Containing Waste Water and Medical Waste Incinerator Fly Ash by Hydrothermal Process with Addition of Sodium Carbonate: A Case Study on Cu(II) Removal

Co-disposal of Heavy Metals Containing Waste Water and Medical Waste Incinerator Fly Ash by Hydrothermal Process with Addition of Sodium Carbonate: A Case Study on Cu(II) Removal

Optimal process design for the polygeneration of SNG, power and heat by hydrothermal gasification of waste biomass: Thermo-economic process modelling and integration

Impact of formation water on the generation of H2S in condensate reservoirs: a case study from the deep Ordovician in the Tazhong Uplift of the Tarim Basin, NW China

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