The Experts below are selected from a list of 7524 Experts worldwide ranked by ideXlab platform
Eng Andersso - One of the best experts on this subject based on the ideXlab platform.
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the effect of Exhaust gas composition on the kinetics of soot oxidation and diesel particulate filter regeneration
Fuel, 2018Co-Authors: Soheil Soltani, Ronnie Andersso, Eng AnderssoAbstract:Experimental investigation of the effect of water vapor on non-catalyzed carbon oxidation with NO 2 has shown a promoting effect of about a factor 2. The promoting effect of water increases with decreasing temperature. Similarly, water was observed to promote carbon oxidation with molecular oxygen. Furthermore, a synergistic effect was observed when NO 2 , water and oxygen were all present in the gas phase. Evidences have been found suggesting that the promoting effect of water proceeds via an interaction with surface oxygen complexes. Implementing the results of this study in the control unit of diesel vehicles will increase the efficiency of filter regeneration. Therefore, the fuel penalty associated with active regeneration cycles can be minimized. To this end, a global kinetic model was developed that can successfully fit the observed reaction rates over the entire range of carbon conversion. The model can be used to optimize filter regeneration by predicting the required Exhaust Condition for maintaining a balance between soot accumulation and burn-off. A population balance model was formulated that makes it possible to keep track of age distribution in a reactor channel or in a soot filter.
Soheil Soltani - One of the best experts on this subject based on the ideXlab platform.
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the effect of Exhaust gas composition on the kinetics of soot oxidation and diesel particulate filter regeneration
Fuel, 2018Co-Authors: Soheil Soltani, Ronnie Andersso, Eng AnderssoAbstract:Experimental investigation of the effect of water vapor on non-catalyzed carbon oxidation with NO 2 has shown a promoting effect of about a factor 2. The promoting effect of water increases with decreasing temperature. Similarly, water was observed to promote carbon oxidation with molecular oxygen. Furthermore, a synergistic effect was observed when NO 2 , water and oxygen were all present in the gas phase. Evidences have been found suggesting that the promoting effect of water proceeds via an interaction with surface oxygen complexes. Implementing the results of this study in the control unit of diesel vehicles will increase the efficiency of filter regeneration. Therefore, the fuel penalty associated with active regeneration cycles can be minimized. To this end, a global kinetic model was developed that can successfully fit the observed reaction rates over the entire range of carbon conversion. The model can be used to optimize filter regeneration by predicting the required Exhaust Condition for maintaining a balance between soot accumulation and burn-off. A population balance model was formulated that makes it possible to keep track of age distribution in a reactor channel or in a soot filter.
Ronnie Andersso - One of the best experts on this subject based on the ideXlab platform.
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the effect of Exhaust gas composition on the kinetics of soot oxidation and diesel particulate filter regeneration
Fuel, 2018Co-Authors: Soheil Soltani, Ronnie Andersso, Eng AnderssoAbstract:Experimental investigation of the effect of water vapor on non-catalyzed carbon oxidation with NO 2 has shown a promoting effect of about a factor 2. The promoting effect of water increases with decreasing temperature. Similarly, water was observed to promote carbon oxidation with molecular oxygen. Furthermore, a synergistic effect was observed when NO 2 , water and oxygen were all present in the gas phase. Evidences have been found suggesting that the promoting effect of water proceeds via an interaction with surface oxygen complexes. Implementing the results of this study in the control unit of diesel vehicles will increase the efficiency of filter regeneration. Therefore, the fuel penalty associated with active regeneration cycles can be minimized. To this end, a global kinetic model was developed that can successfully fit the observed reaction rates over the entire range of carbon conversion. The model can be used to optimize filter regeneration by predicting the required Exhaust Condition for maintaining a balance between soot accumulation and burn-off. A population balance model was formulated that makes it possible to keep track of age distribution in a reactor channel or in a soot filter.
Hao Yu - One of the best experts on this subject based on the ideXlab platform.
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a facile strategy of enhancing interaction between cerium and manganese oxides for catalytic removal of gaseous organic contaminants
Applied Catalysis B-environmental, 2019Co-Authors: Jin Chen, Xi Chen, Mingzhu Jiang, Wenjian Xu, Hao YuAbstract:Abstract A facile strategy of redox etching-precipitation is developed to support cerium oxide (CeOy) on crystal α-type manganese dioxide nanorod (OMS). By means of this method, the contact between CeOy and OMS can be strengthened and results in enhancement of interfacial effect, thereby causing consequent changes in physicochemical properties. Through screening and evaluation, the as-prepared catalyst of 5.0% CeOy/OMS (5.0% Ce/OMS) with an optimal Ce/Mn molar ratio of 0.05, owning more acidity, more surficial oxygen vacancies as well as more mobility of lattice oxygen, exhibits a remarkable activity and stability for catalytic oxidation of chlorobenzene. Under catalysis of 5.0% Ce/OMS, the demanded temperature for complete removal of chlorobenzene is about 360 °C, which is lower than the required temperature (above 400 °C) for NH3-5.0% Ce/OMS prepared via conventional method of NH3⋅H2O precipitation. Meanwhile, 5.0% Ce/OMS shows a good tolerance to high water content (10 vol.%) and a better recyclability, adapts to oxidation of various kinds of volatile organic compounds (VOCs) and VOCs mixture under simulated realistic Exhaust Condition. With correlation of structure and performance, it is revealed that interface acts as active site to catalyze oxidation.
Jin Chen - One of the best experts on this subject based on the ideXlab platform.
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a facile strategy of enhancing interaction between cerium and manganese oxides for catalytic removal of gaseous organic contaminants
Applied Catalysis B-environmental, 2019Co-Authors: Jin Chen, Xi Chen, Mingzhu Jiang, Wenjian Xu, Hao YuAbstract:Abstract A facile strategy of redox etching-precipitation is developed to support cerium oxide (CeOy) on crystal α-type manganese dioxide nanorod (OMS). By means of this method, the contact between CeOy and OMS can be strengthened and results in enhancement of interfacial effect, thereby causing consequent changes in physicochemical properties. Through screening and evaluation, the as-prepared catalyst of 5.0% CeOy/OMS (5.0% Ce/OMS) with an optimal Ce/Mn molar ratio of 0.05, owning more acidity, more surficial oxygen vacancies as well as more mobility of lattice oxygen, exhibits a remarkable activity and stability for catalytic oxidation of chlorobenzene. Under catalysis of 5.0% Ce/OMS, the demanded temperature for complete removal of chlorobenzene is about 360 °C, which is lower than the required temperature (above 400 °C) for NH3-5.0% Ce/OMS prepared via conventional method of NH3⋅H2O precipitation. Meanwhile, 5.0% Ce/OMS shows a good tolerance to high water content (10 vol.%) and a better recyclability, adapts to oxidation of various kinds of volatile organic compounds (VOCs) and VOCs mixture under simulated realistic Exhaust Condition. With correlation of structure and performance, it is revealed that interface acts as active site to catalyze oxidation.