The marine industry has been striving to seek for proper strategies curb air emissions from global shipping activities. To support the transition sustainable shipping, this paper was proposed evaluate holistic environmental benefits of LNG partial re-liquefaction system applied carriers by comparing among five different combination/configuration systems. theory life cycle assessment employed wi...

A gradient free optimization-simulationmethod for processesmodelledwith the simulator AspenHYSYS is developed. The tool is based on a Tabu Search (TS) and the Nelder-Mead Downhill Simplex (NMDS) method. The local optima that result from the TS are fine-tuned with NMDS to reduce the required number of simulations. The tool has been applied to find the total refrigerant flow rate, composition and...

−An industrial scale hexane process is designed for the implementation of a fully thermally coupled distillation column (FTCDC). A semi-rigorous material balance and Peng-Robinson equilibrium relation are utilized in the structural design. The operational design is conducted with a commercial design program, the HYSYS. The design outcome of the structural design indicates it to be comparable wi...

“Volatile Organic Compounds” (VOCs) are known to contribute significantly environmental pollution. Crude oil loading operations in a marine tanker produces significant quantity of hydrocarbon (HC) vapours the surrounding atmosphere. A large percentage these HC vapour emission consists ‘Volatile Compounds’ (VOCs). This VOC has not been previously analysed detail understand health and impact. The...

Abstract. Natural gases containing impurities, namely carbon dioxide (CO2), heavy hydrocarbons, hydrogen sulfide (H2S), and water vapour, need treatment for removing acidic (CO2 H2S) to reduce corrosion enhance the heat capacity of gas. This gas is commercially known as "sour", typically, sour any that contains significant levels sulfide. The presence can affect natural quality, which also lead...

Pakistan is a gas rich but power poor country. It consumes approximately 1, 559 Billion cubic feet of natural gas annually. Gas is transported around the country in a system of pressurized transmission pipelines under a pressure range of 600-1000 psig exclusively operated by two state owned companies i.e. SNGPL (Sui Northern Gas Pipelines Limited) and SSGCL (Sui Southern Gas Company Limited). T...