Kinetics of SrSO4 reduction with CO

Plewa, J.; Steindor, J.; Nowakowski, J.; Fitzner, K.

doi:10.1016/0040-6031(89)87241-7

Cited by 6 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, the solid-state reaction between SrSO 4 and C is of little importance. Plewa et al (1989) has concluded that SrSO 4 can be transformed into SrS at temperatures Int. J.…”

Section: Introductionmentioning

confidence: 99%

Carbothermic reduction of mechanically activated celestite

Erdemoğlu

2009

International Journal of Mineral Processing

View full text Add to dashboard Cite

“…Thus, the solid-state reaction between SrSO 4 and C is of little importance. Plewa et al (1989) has concluded that SrSO 4 can be transformed into SrS at temperatures Int. J.…”

Section: Introductionmentioning

confidence: 99%

Carbothermic reduction of mechanically activated celestite

Erdemoğlu

2009

International Journal of Mineral Processing

View full text Add to dashboard Cite

“…21,22 However, a catalyst has also been introduced for this reaction. 23 The literature survey for celestite reaction with gaseous reducing agents showed only the reduction with carbon monoxide, 24,25 and converted natural gas (COzH 2 mixtures) in a fluidised bed. 26,27 There is no kinetic measurement on the direct methane (without any steam reformer for natural gas converting) reduction of SrSO 4 in the literature.…”

Section: Introductionmentioning

confidence: 99%

Kinetic study of celestite reduction by methane

Ebrahim

Jamshidi

2009

Mineral Processing and Extractive Metallurgy

View full text Add to dashboard Cite

Strontium carbonate is an important industrial material. Conventional method of SrCO 3 preparation is based on high temperature reduction of celestite (natural strontium sulphate) by coal. This method produces a great amount of CO 2 (greenhouse gas). This research offers a new clean method for the production of SrCO 3 with methane as the reducing agent. This new process can decrease the CO 2 emission up to 50%. In this work the kinetics of SrSO 4 reduction by CH 4 was studied between 850 and 1000uC by thermogravimetry. The gaseous products of the reaction were also detected by an online mass spectrometer. Then by applying the grain model, the kinetic parameters were determined. These parameters are essential for design of the industrial plants. This study shows other advantages such as lower operating temperatures, condition with no ash as impurity and the decrease in residence time with respect to the common coal based method.

show abstract

“…The dissolved SrS reacts with sodium carbonate and/or CO 2 to precipitate the strontium carbonate. [12][13][14][15] Although the reduction of SrSO 4 is an important step to produce water soluble SrS, the kinetics and mechanism of reduction are not covered well through the research investigations. Sonawane et al 16 studied the reduction of celestite powder with particles of active charcoal in the presence and absence of catalysts.…”

Section: Introductionmentioning

confidence: 99%

Isothermal reduction behaviour of celestite concentrate by solid carbon

Halim

Ibrahim

El-Barawy

2009

Mineral Processing and Extractive Metallurgy

View full text Add to dashboard Cite

Compacts made of concentrated celestite ore (SrSO 4 , 96?5%) were reduced isothermally at 950-1100uC by solid carbon. The reduction of SrSO 4 (water insoluble) to SrS (water soluble) is an important step to produce the most common industrial reagents of strontium salts (SrCO 3 , SrNO 3 and SrCl 2 ). The isothermal reduction behaviour was investigated using advanced quadrupole mass spectrometer. X-ray diffraction and SEM analysis were used to characterise the reduced samples. The influence of reduction conditions on the structural characteristics of the products was extensively studied to get clear comprehension of reduction process. It was found that celestite ore is completely reduced to SrS at a temperature above 900uC and the reduction rate increases with temperature. The experimental measurements were used to elucidate the carbothermic reduction mechanism of celestite ores. The reduction of celestite proceeded in only one step and Boudouard reaction is the rate controlling step. The calculated values of activation energy (115?3 kJ mol 21 ) revealed that solid state diffusion mechanism seems to have a role in the reduction process.

show abstract

Kinetics of SrSO4 reduction with CO

Cited by 6 publications

References 3 publications

Carbothermic reduction of mechanically activated celestite

Carbothermic reduction of mechanically activated celestite

Kinetic study of celestite reduction by methane

Isothermal reduction behaviour of celestite concentrate by solid carbon

Contact Info

Product

Resources

About