Distribuição de derivados de petróleo por redes de polidutos: uma abordagem através de algoritmos evolucionários híbridos para um problema triobjetivo

An important problem faced by the oil industry is to distribute multiple oil products through pipelines. Distribution is done in a network composed of refineries (source nodes), storage parks (intermediate nodes), and terminals (demand nodes) interconnected by a set of pipelines transporting oil and derivatives between adjacent areas. Constraints related to storage limits, delivery time, sources availability, sending and receiving limits, among others, must be satisfied. Some researchers deal with this problem under a discrete viewpoint in which the flow in the network is seen as batches sending. Usually, there is no separation device between batches of different products and the losses due to interfaces may be significant. Minimizing delivery time is a typical objective adopted by engineers when scheduling products sending in pipeline networks. However, costs incurred due to losses in interfaces cannot be disregarded. The cost also depends on pumping expenses, which are mostly due to the electricity cost. Since industrial electricity tariff varies over the day, pumping at different time periods have different cost. This work presents an experimental investigation of computational methods designed to deal with the problem of distributing oil derivatives in networks considering three minimization objectives simultaneously: delivery time, losses due to interfaces and electricity cost. The problem is NP-hard and is addressed with hybrid evolutionary algorithms. Hybridizations are mainly focused on Transgenetic Algorithms and classical multi-objective evolutionary algorithm architectures such as MOEA/D, NSGA2 and SPEA2. Three architectures named MOTA/D, NSTA and SPETA are applied to the problem. An experimental study compares the algorithms on thirty test cases. To analyse the results obtained with the algorithms Pareto-compliant quality indicators are used and the significance of the results evaluated with non-parametric statistical tests.

Determinação de compostos carbonilados e carboxilados em derivados de petróleo

Although metals and nitrogen/sulfur compounds have been the main concern of the petroleum industry, issues concerning the harmful effects on catalysts poisoning and product contamination by other contaminants such as oxygen-containing compounds have been raised. Trace amounts of carbonyl and carboxyl compounds in petroleum products can lead to catalyst poisoning. Additionally, oxygenates may be present in final polyethylene and polypropylene resins, affecting the quality of food packaging. In this work, we reviewed potential analytical approaches for oxygenates determination in petroleum products and report the features of each potential technique.

Aplicação da técnica de caminhamento elétrico em área contaminada por derivados de petróleo

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Nota de la Secretaría sobre la situación de la industria de los derivados del petróleo en Centroamérica

Incluye Bibliografía

Cuadros y gráficas sobre derivados del petróleo

Incluye Bibliografía

Istmo Centroamericano: algunas posibilidades de ahorro en el sector transportes al sustituir derivados del petróleo por otros energéticos: versión provisional

Incluye Bibliografía

Posibilidades de ahorro de derivados del petróleo en el transporte urbano del Istmo Centroamericano

Incluye Bibliografía

Alternativas de expansión de la oferta de derivados del petróleo en el Istmo Centroamericano: términos de referencia generales

Incluye Bibliografía

Istmo Centroamericano: estimación de posibilidades de ahorro en el sector transporte al sustituir derivados del petróleo por otros energéticos

Incluye Bibliografía

Istmo Centroamericano: estudio sobre la armonización de las especificaciones de los productos derivados del petróleo

Incluye Bibliografía

La evolución de los precios internos de los productos energéticos derivados del petróleo y su impacto en la dependencia externa de algunos países de América Latina no exportadores de petróleo, 1960-1985

Incluye Bibliografía

Biodegradação de derivados do petróleo com a aplicação de biossurfactante produzido por Bacillus subtilis

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Desenvolvimento de métodos eletroanalíticos para determinação de compostos nitrogenados em combustíveis derivados do petróleo

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)