A study of the kinetics of bismuth telluride synthesis by an oxide reduction method

2020 ◽  
Vol 683 ◽  
pp. 178437 ◽  
Author(s):  
Bartosz Trawiński ◽  
Beata Bochentyn ◽  
Marcin Łapiński ◽  
Bogusław Kusz
Keyword(s):  
Bismuth Telluride ◽  
Reduction Method ◽  
Oxide Reduction ◽  
Kinetics Of

Kinetics of iron oxide reduction using CO: Experiments and modeling

2022 ◽  
pp. 134384
Author(s):  
Prakash V. Ponugoti ◽  
Pritesh Garg ◽  
Sanjana N. Geddam ◽  
Samik Nag ◽  
Vinod M. Janardhanan
Keyword(s):  
Iron Oxide ◽  
Oxide Reduction ◽  
Iron Oxide Reduction ◽  
Kinetics Of

ChemInform Abstract: KINETICS OF COPPER(II) OXIDE REDUCTION BY HYDROGEN

1976 ◽  
Vol 7 (13) ◽  
pp. no-no
Author(s):  
ROBERT SCHOEPP ◽  
ISSAM HAJAL
Keyword(s):  
Oxide Reduction ◽  
Kinetics Of

scholarly journals A study on the kinetics of bismuth oxide reduction by hydrogen as applied to the technology of removing hydrogen from circulation circuits with heavy liquid metal coolants

2019 ◽  
Vol 5 (4) ◽  
pp. 331-336
Author(s):  
Igor I. Ivanov ◽  
Vasily M. Shelemetyev ◽  
Radomir Sh. Askhadullin
Keyword(s):  
Liquid Metal ◽  
Bismuth Oxide ◽  
Reduction Process ◽  
Heavy Liquid ◽  
Reduction Degree ◽  
Oxide Reduction ◽  
Test Reaction ◽  
Water Steam ◽  
Temperature Range ◽  
Kinetics Of

As part of the project on developing methods for removing hydrogen and tritium from the circulation circuits of reactor plants with heavy liquid metal coolants, the authors studied the kinetics of bismuth oxide reduction by hydrogen in the temperature range of 425–500 °C and hydrogen concentrations of 25–100 vol.%. The kinetic characteristics of the test reaction were determined by continuous measurements of the water steam (reaction product) concentration in mixtures of hydrogen with helium that passed through a heated reaction vessel with a sample of bismuth oxide. The water steam concentration was measured by a thermal-conductivity detector. The obtained time dependences of the bismuth oxide reduction degree (with varying reaction conditions) were processed by the affine time transformation method. It was also found that the reduction process ran in kinetic mode. The reduction mechanism is the same in the entire temperature range. The limiting reaction stage is the adsorption of hydrogen on the surface of the bismuth oxide sample. The time dependence of the reduction degree is in good agreement with Avrami-Erofeev equation with n = 1. The reaction activation energy is 92.8 ± 1.9 kJ/mol. The reduction reaction rate is directly proportional to the concentration of hydrogen in its mixture with an inert gas.

Sign in / Sign up

Export Citation Format

Share Document