Estimation and Optimization of the Radiant Field in Flat Plate Heterogeneous Photoreactors with the P1-approximation of the Radiative Transfer Equation (RTE).

Clovis Nchikou

Makale detayları

Estimation and Optimization of the Radiant Field in Flat Plate Heterogeneous Photoreactors with the P1-approximation of the Radiative Transfer Equation (RTE).

Yazarlar:

Clovis Nchikou

Yayıncı:

Turkish Chemical Society

Ana Başlıklar:

Water Treatment Processes

Dergi:

Journal of the Turkish Chemical Society Section B: Chemical Engineering Vol.7 Issue 2, pp.87-104

Belge Tipi:

Makale

Yayın Tarihi:

4/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001318358

pISSN:

2564-6907

Anahtar kelimeler:

Özet:

 In this work, the P1-approximation of the radiative transfer equation RTE was used for the description and optimization of the radiant field in a flat plate photoreactor under solar radiation with three commercial brands of titanium dioxide photocatalysts. The boundary layer of photon absorption δ_abs, the average volumetric rate of photon absorption VRPA, and a new apparent optical thickness ζ_app1 were used as design parameters for optimization. A simple mathematical expression for the calculation of δ_abs also called the best reactor thickness was formulated. For the three catalysts, varying the reactor height L, it was found a decrease in the local volumetric rate of photon absorption LVRPA from the top side until the bottom of the reactor for any value of the catalyst loading Ccat. It was also observed that when Ccat increases the VRPA increases exponentially until a fixed value where it remains almost constant. With L 1 cm, the optimum Ccat Ccatop was 0.2 gl in 0.85 cm of thickness, 0.3 gl in 0.82 cm of thickness, and 0.4 gl in 0.89 cm of thickness for the photocatalysts Degussa P-25, Aldrich, and Hombitak respectively. The optimum apparent optical thickness ζ_app1,op was 4.03, 4.62, and 3.7 for the photocatalysts Degussa P-25, Aldrich, and Hombitak respectively. These results are in good agreement with the literature. Results found in this work give predictions on radiation absorption in flat plate photocatalytic reactors with different heights.

 In this work, the P1-approximation of the radiative transfer equation RTE was used for the description and optimization of the radiant field in a flat plate photoreactor under solar radiation with three commercial brands of titanium dioxide photocatalysts. The boundary layer of photon absorption δ_abs, the average volumetric rate of photon absorption VRPA, and a new apparent optical thickness ζ_app1 were used as design parameters for optimization. A simple mathematical expression for the calculation of δ_abs also called the best reactor thickness was formulated. For the three catalysts, varying the reactor height L, it was found a decrease in the local volumetric rate of photon absorption LVRPA from the top side until the bottom of the reactor for any value of the catalyst loading Ccat. It was also observed that when Ccat increases the VRPA increases exponentially until a fixed value where it remains almost constant. With L 1 cm, the optimum Ccat Ccatop was 0.2 gl in 0.85 cm of thickness, 0.3 gl in 0.82 cm of thickness, and 0.4 gl in 0.89 cm of thickness for the photocatalysts Degussa P-25, Aldrich, and Hombitak respectively. The optimum apparent optical thickness ζ_app1,op was 4.03, 4.62, and 3.7 for the photocatalysts Degussa P-25, Aldrich, and Hombitak respectively. These results are in good agreement with the literature. Results found in this work give predictions on radiation absorption in flat plate photocatalytic reactors with different heights.

 In this work, the P1-approximation of the radiative transfer equation RTE was used for the description and optimization of the radiant field in a flat plate photoreactor under solar radiation with three commercial brands of titanium dioxide photocatalysts. The boundary layer of photon absorption δ_abs, the average volumetric rate of photon absorption VRPA, and a new apparent optical thickness ζ_app1 were used as design parameters for optimization. A simple mathematical expression for the calculation of δ_abs also called the best reactor thickness was formulated. For the three catalysts, varying the reactor height L, it was found a decrease in the local volumetric rate of photon absorption LVRPA from the top side until the bottom of the reactor for any value of the catalyst loading Ccat. It was also observed that when Ccat increases the VRPA increases exponentially until a fixed value where it remains almost constant. With L 1 cm, the optimum Ccat Ccatop was 0.2 gl in 0.85 cm of thickness, 0.3 gl in 0.82 cm of thickness, and 0.4 gl in 0.89 cm of thickness for the photocatalysts Degussa P-25, Aldrich, and Hombitak respectively. The optimum apparent optical thickness ζ_app1,op was 4.03, 4.62, and 3.7 for the photocatalysts Degussa P-25, Aldrich, and Hombitak respectively. These results are in good agreement with the literature. Results found in this work give predictions on radiation absorption in flat plate photocatalytic reactors with different heights.

 In this work, the P1-approximation of the radiative transfer equation RTE was used for the description and optimization of the radiant field in a flat plate photoreactor under solar radiation with three commercial brands of titanium dioxide photocatalysts. The boundary layer of photon absorption δ_abs, the average volumetric rate of photon absorption VRPA, and a new apparent optical thickness ζ_app1 were used as design parameters for optimization. A simple mathematical expression for the calculation of δ_abs also called the best reactor thickness was formulated. For the three catalysts, varying the reactor height L, it was found a decrease in the local volumetric rate of photon absorption LVRPA from the top side until the bottom of the reactor for any value of the catalyst loading Ccat. It was also observed that when Ccat increases the VRPA increases exponentially until a fixed value where it remains almost constant. With L 1 cm, the optimum Ccat Ccatop was 0.2 gl in 0.85 cm of thickness, 0.3 gl in 0.82 cm of thickness, and 0.4 gl in 0.89 cm of thickness for the photocatalysts Degussa P-25, Aldrich, and Hombitak respectively. The optimum apparent optical thickness ζ_app1,op was 4.03, 4.62, and 3.7 for the photocatalysts Degussa P-25, Aldrich, and Hombitak respectively. These results are in good agreement with the literature. Results found in this work give predictions on radiation absorption in flat plate photocatalytic reactors with different heights.

Makale detayları

Estimation and Optimization of the Radiant Field in Flat Plate Heterogeneous Photoreactors with the P1-approximation of the Radiative Transfer Equation (RTE).

Yazarlar:

Clovis Nchikou

Yayıncı:

Turkish Chemical Society

Ana Başlıklar:

Water Treatment Processes

Dergi:

Journal of the Turkish Chemical Society Section B: Chemical Engineering Vol.7 Issue 2, pp.87-104

Belge Tipi:

Makale

Yayın Tarihi:

4/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001318358

pISSN:

2564-6907

Flat plate reactor

Boundary layer

LVRPA

Titanium dioxide

P1-approximation.

Sayı

Makale detayları

Estimation and Optimization of the Radiant Field in Flat Plate Heterogeneous Photoreactors with the P1-approximation of the Radiative Transfer Equation (RTE).

Yazarlar: Clovis Nchikou

Yayıncı: Turkish Chemical Society

Ana Başlıklar: Water Treatment Processes

Dergi: Journal of the Turkish Chemical Society Section B: Chemical Engineering Vol.7 Issue 2, pp.87-104

Belge Tipi: Makale

Yayın Tarihi: 4/2024

Belge Dili: İngilizce

Document ID (Org No.): 2001318358

pISSN: 2564-6907

Flat plate reactor

Boundary layer

LVRPA

Titanium dioxide

P1-approximation.

Sayı

Yazarlar:

Clovis Nchikou

Yayıncı:

Turkish Chemical Society

Ana Başlıklar:

Water Treatment Processes

Dergi:

Journal of the Turkish Chemical Society Section B: Chemical Engineering Vol.7 Issue 2, pp.87-104

Belge Tipi:

Makale

Yayın Tarihi:

4/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001318358

pISSN:

2564-6907