Alireza Tehrani Nejad | IFP School (original) (raw)
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University of the Basque Country, Euskal Herriko Unibertsitatea
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Papers by Alireza Tehrani Nejad
Energy Economics, 2007
The allocation of CO 2 emissions associated with petroleum refineries to petroleum joint products... more The allocation of CO 2 emissions associated with petroleum refineries to petroleum joint products is a necessary step in Well-to-Tank analysis in order to evaluate the environmental impacts of individual automotive fuels. Oil refining is essentially a joint production system and due to the complex nature of the process involved, it is very difficult to establish any noncontroversial allocation pattern for oil products. Under certain conditions, however, refinery linear programming models can provide a non-arbitrary additive allocation schema based on the marginal contribution of each oil product to the total CO 2 emissions. But in general, these conditions are not satisfied. In this paper, by extending the LP approach to the optimal Simplex tableau, we propose an original two-stage methodology based on the marginal contribution of oil products and the production elasticity of unit processes to provide an additive CO 2 allocation scheme. We show that this procedure emerges from the equilibrium behavior of the refinery and is consistent with microeconomic theory. A numerical example is provided.
Environmental Impact Assessment Review, 2015
Recently, linear programing (LP) models have been extended to track the marginal CO 2 intensity o... more Recently, linear programing (LP) models have been extended to track the marginal CO 2 intensity of automotive fuels at the refinery gate. The obtained CO 2 data are recommended for policy making because they capture the economic and environmental tensions as well as the processing effects related to oil products. However, they are proven to be extremely sensitive to small perturbations and therefore useless in practice. In this paper, we first investigate the theoretical reasons of this drawback. Then, we develop a multiple objective LP framework to assess relevant marginal CO 2 footprints that preserve both defensibility and stability at a satisfactory level of acceptance. A case study illustrates this new methodology.
The International Journal of Life Cycle Assessment, 2014
Your article is protected by copyright and all rights are held exclusively by Springer-Verlag Ber... more Your article is protected by copyright and all rights are held exclusively by Springer-Verlag Berlin Heidelberg. This e-offprint is for personal use only and shall not be selfarchived in electronic repositories. If you wish to self-archive your article, please use the accepted manuscript version for posting on your own website. You may further deposit the accepted manuscript version in any repository, provided it is only made publicly available 12 months after official publication or later and provided acknowledgement is given to the original source of publication and a link is inserted to the published article on Springer's website. The link must be accompanied by the following text: "The final publication is available at link.springer.com".
Energy Economics, 2007
The allocation of CO 2 emissions associated with petroleum refineries to petroleum joint products... more The allocation of CO 2 emissions associated with petroleum refineries to petroleum joint products is a necessary step in Well-to-Tank analysis in order to evaluate the environmental impacts of individual automotive fuels. Oil refining is essentially a joint production system and due to the complex nature of the process involved, it is very difficult to establish any noncontroversial allocation pattern for oil products. Under certain conditions, however, refinery linear programming models can provide a non-arbitrary additive allocation schema based on the marginal contribution of each oil product to the total CO 2 emissions. But in general, these conditions are not satisfied. In this paper, by extending the LP approach to the optimal Simplex tableau, we propose an original two-stage methodology based on the marginal contribution of oil products and the production elasticity of unit processes to provide an additive CO 2 allocation scheme. We show that this procedure emerges from the equilibrium behavior of the refinery and is consistent with microeconomic theory. A numerical example is provided.
Environmental Impact Assessment Review, 2015
Recently, linear programing (LP) models have been extended to track the marginal CO 2 intensity o... more Recently, linear programing (LP) models have been extended to track the marginal CO 2 intensity of automotive fuels at the refinery gate. The obtained CO 2 data are recommended for policy making because they capture the economic and environmental tensions as well as the processing effects related to oil products. However, they are proven to be extremely sensitive to small perturbations and therefore useless in practice. In this paper, we first investigate the theoretical reasons of this drawback. Then, we develop a multiple objective LP framework to assess relevant marginal CO 2 footprints that preserve both defensibility and stability at a satisfactory level of acceptance. A case study illustrates this new methodology.
The International Journal of Life Cycle Assessment, 2014
Your article is protected by copyright and all rights are held exclusively by Springer-Verlag Ber... more Your article is protected by copyright and all rights are held exclusively by Springer-Verlag Berlin Heidelberg. This e-offprint is for personal use only and shall not be selfarchived in electronic repositories. If you wish to self-archive your article, please use the accepted manuscript version for posting on your own website. You may further deposit the accepted manuscript version in any repository, provided it is only made publicly available 12 months after official publication or later and provided acknowledgement is given to the original source of publication and a link is inserted to the published article on Springer's website. The link must be accompanied by the following text: "The final publication is available at link.springer.com".