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The importance of Super-capacitors (SCs) stems from their distinctive properties including long cycle life, high strength and environment friendly, they are sharing similar fundamental equations as the traditional capacitors; for attaining high capacitances SC using electrodes materials with thinner dielectrics and high specific surface area. In this review paper, all types of SCs were covered, depending on the energy storage mechanism; a brief overview of the materials and technologies used for SCs is presented. The major concentration is on materials like the metal oxides, carbon materials, conducting polymers along with their composites. The composites’ performance was examined via parameters like capacitance, energy, cyclic performance power and the rate capability also presents details regarding the electrolyte materials.

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Crude oil is considered as a major source of energy all over the world. Midstream refers to the various methods of transportation. Important issues that oil transportation methods face are spills and inadvertent emissions. Therefore, most of the technology developments in transportation methods are aimed at reducing emissions, increasing efficiency, or preventing spills and leaks. Piping systems are the safest and most efficient and cost-effective way for crude oil transportation. The process suffers from serious problems such as: asphaltene and paraffin structures interactions, pipes pressure drop, and high pumping energy consumption. One of the economical important challenges in oil pipeline transportation is to keep the flowability and reduce the pressure drop along the pipe. The current review highlights the recent and most development techniques which have been used to enhance the fluidity of crude oil in pipelines.

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