EFFECT OF CALCINATION TEMPERATURE AND CALCINATION TIME ON THE CATALYTIC ACTIVITY OF MNOX/ MULTI-WALLED CARBON NANOTUBE FOR LOW TEMPERATURE SELECTIVE CATALYTIC REDUCTION

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Pourkhalil M.

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Journal: Journal of Applied Research in Chemistry Year:2017 | Volume:11 | Issue:1 Page(s): 67-77

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Title

EFFECT OF CALCINATION TEMPERATURE AND CALCINATION TIME ON THE CATALYTIC ACTIVITY OF MNOX/ MULTI-WALLED CARBON NANOTUBE FOR LOW TEMPERATURE SELECTIVE CATALYTIC REDUCTION

Author(s)

Pourkhalil M. | Issue Writer Certificate

Keywords

MANGANESE OXIDEQ2

CALCINATIONQ1

NITROGEN OXIDEQ2

MULTIWALLED CARBON NANOTUBESQ2

LOW TEMPERATURE SELECTIVE CATALYTIC REDUCTIONQ1

Abstract

The objective of this research is investigation and optimization of CALCINATION time and temperature of MANGANESE OXIDE catalyst supported on MULTIWALLED CARBON NANOTUBES for selective catalytic reduction of NITROGEN OXIDEs by ammonia. The catalysts were prepared by the incipient wetness impregnation method and calcined at 300-600oC for 2-12h in an atmosphere of Argon.XRD, Raman, H2-TPR, and XPS analyzes showed that CALCINATION temperature is an effective factor by changing the oxidation state of Manganese, so that the catalyst calcined at 300oC has the maximum activity with MnO2 as a dominant phase of manganese. Also, the presence of nitrate species reminded from decomposition of manganese nitrate at moderate CALCINATION temperature (300oC) is beneficial to NH3- LOW TEMPERATURE SELECTIVE CATALYTIC REDUCTION of NOx by increasing catalyst acidity and NH3 adsorption on the surface of the catalyst. The effect of increasing the CALCINATION time from 2 to 6h on crystallinity, surface area, and oxidation state of active site was negligible. However, with refer to the H2-TPR analyze, increasing the CALCINATION time to 12h decreased NOx conversion a little, an effect that could be attributed to the reduction of residual nitrate species. Finally, the 12wt% MANGANESE OXIDE catalyst calcined at 300oC for 3h had the best activity and N2 selectivity of 97% and 99.5%, respectively.

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APA: Copy

Pourkhalil, M.. (2017). EFFECT OF CALCINATION TEMPERATURE AND CALCINATION TIME ON THE CATALYTIC ACTIVITY OF MNO_X/ MULTI-WALLED CARBON NANOTUBE FOR LOW TEMPERATURE SELECTIVE CATALYTIC REDUCTION. JOURNAL OF APPLIED RESEARCHES IN CHEMISTRY (JARC), 11(1), 67-77. SID. https://sid.ir/paper/180203/en

Vancouver: Copy

Pourkhalil M.. EFFECT OF CALCINATION TEMPERATURE AND CALCINATION TIME ON THE CATALYTIC ACTIVITY OF MNO_X/ MULTI-WALLED CARBON NANOTUBE FOR LOW TEMPERATURE SELECTIVE CATALYTIC REDUCTION. JOURNAL OF APPLIED RESEARCHES IN CHEMISTRY (JARC)[Internet]. 2017;11(1):67-77. Available from: https://sid.ir/paper/180203/en

IEEE: Copy

M. Pourkhalil, “EFFECT OF CALCINATION TEMPERATURE AND CALCINATION TIME ON THE CATALYTIC ACTIVITY OF MNO_X/ MULTI-WALLED CARBON NANOTUBE FOR LOW TEMPERATURE SELECTIVE CATALYTIC REDUCTION,” JOURNAL OF APPLIED RESEARCHES IN CHEMISTRY (JARC), vol. 11, no. 1, pp. 67–77, 2017, [Online]. Available: https://sid.ir/paper/180203/en

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