scholarly journals Water-density effects on phenol oxidation in supercritical water

AIChE Journal ◽  
2003 ◽  
Vol 49 (3) ◽  
pp. 718-726 ◽  
Author(s):  
Jeffrey T. Henrikson ◽  
Phillip E. Savage
Keyword(s):  
Supercritical Water ◽  
Phenol Oxidation ◽  
Water Density ◽  
Density Effects

Water density effects on methanol oxidation in supercritical water at high pressure up to 100MPa

2011 ◽  
Vol 58 (1) ◽  
pp. 142-149 ◽  
Author(s):  
Tatsuya Fujii ◽  
Rumiko Hayashi ◽  
Shin-ichiro Kawasaki ◽  
Akira Suzuki ◽  
Yoshito Oshima
Keyword(s):  
High Pressure ◽  
Methanol Oxidation ◽  
Supercritical Water ◽  
Water Density ◽  
Density Effects

Phenol oxidation in supercritical water

1990 ◽  
Vol 3 (4) ◽  
pp. 240-248 ◽  
Author(s):  
Thomas D. Thornton ◽  
Phillip E. Savage
Keyword(s):  
Supercritical Water ◽  
Phenol Oxidation

Coupled Three-Dimensional Neutronics and Thermal-Hydraulics Analysis for SCWR Core Typical Transients

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Wang Lianjie ◽  
Lu Di ◽  
Zhao Wenbo
Keyword(s):  
Electric Power ◽  
Supercritical Water ◽  
Transient Analysis ◽  
Three Dimensional ◽  
Thermal Hydraulics ◽  
Water Density ◽  
Fuel Temperature ◽  
Control Rod ◽  
Reactor Protection System ◽  
Supercritical Water Cooled Reactor

Transient performance of China supercritical water-cooled reactor (SCWR) with the rated electric power of 1000 MWel (CSR1000) core during some typical transients, such as control rod (CR) ejection and uncontrolled CR withdrawal, is analyzed and evaluated with the coupled three-dimensional neutronics and thermal-hydraulics SCWR transient analysis code. The 3D transient analysis shows that the maximum cladding surface temperature (MCST) retains lower than safety criteria 1260 °C during the process of CR ejection accident, and the MCST retains lower than safety criteria 850 °C during the process of uncontrolled CR withdrawal transient. The safety of CSR1000 core can be ensured during the typical transients under the salient fuel temperature and water density reactivity feedback and the essential reactor protection system.

Water Density Effects on Homogeneous Water-Gas Shift Reaction Kinetics

1998 ◽  
Vol 102 (16) ◽  
pp. 2673-2678 ◽  
Author(s):  
Steven F. Rice ◽  
Richard R. Steeper ◽  
Jason D. Aiken
Keyword(s):  
Reaction Kinetics ◽  
Water Gas Shift ◽  
Water Density ◽  
Water Gas Shift Reaction ◽  
Density Effects ◽  
Shift Reaction ◽  
Water Gas

scholarly journals Supercritical water oxidation of phenol and process enhancement with in situ formed Fe2O3 nano catalyst

2021 ◽  
Author(s):  
Ammar Al-Atta ◽  
Farooq Sher ◽  
Abu Hazafa ◽  
Ayesha Zafar ◽  
Hafiz M. N. Iqbal ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Supercritical Water ◽  
Water Oxidation ◽  
Phenol Oxidation ◽  
Average Particle ◽  
Supercritical Water Oxidation ◽  
Study Objective ◽  
Cod Reduction ◽  
Nano Catalyst

AbstractDuring the past few decades, the treatment of hazardous waste and toxic phenolic compounds has become a major issue in the pharmaceutical, gas/oil, dying, and chemical industries. Considering polymerization and oxidation of phenolic compounds, supercritical water oxidation (SCWO) has gained special attention. The present study objective was to synthesize a novel in situ Fe2O3nano-catalyst in a counter-current mixing reactor by supercritical water oxidation (SCWO) method to evaluate the phenol oxidation and COD reduction at different operation conditions like oxidant ratios and concentrations. Synthesized nano-catalyst was characterized by powder X-ray diffraction (XRD) and transmission electron microscope (TEM). TEM results revealed the maximum average particle size of 26.18 and 16.20 nm for preheated and non-preheated oxidant configuration, respectively. XRD showed the clear peaks of hematite at a 2θ value of 24, 33, 35.5, 49.5, 54, 62, and 64 for both catalysts treated preheated and non-preheated oxidant configurations. The maximum COD reduction and phenol oxidation of about 93.5% and 99.9% were observed at an oxidant ratio of 1.5, 0.75 s, 25 MPa, and 380 °C with a non-preheated H2O2 oxidant, while in situ formed Fe2O3nano-catalyst showed the maximum phenol oxidation of 99.9% at 0.75 s, 1.5 oxidant ratio, 25 MPa, and 380 °C. Similarly, in situ formed Fe2O3 catalyst presented the highest COD reduction of 97.8% at 40 mM phenol concentration, 1.0 oxidant ratio, 0.75 s residence time, 380 °C, and 25 MPa. It is concluded and recommended that SCWO is a feasible and cost-effective alternative method for the destruction of contaminants in water which showed the complete conversion of phenol within less than 1 s and 1.5 oxidant ratio.

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