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The production of SNG from coal is a process of particular interest to Colombia, where depletion of natural gas is being foreseen in the coming years due to the increasingly high level of demand of the last several years carbon reserves are still foreseen to last for around 90 years. Therefore, the gasification continues to be an important topic to research. Future plants will be hybrid power/chemical plants with gasification as the key unit operation as a consequence, the thermochemical process has been emerging as the premier unit operation in the energy and chemical industries. And gasification in chemical plants yields syngas that can be used to produce a wide spectrum of chemical products, such as ammonia, methanol, methane, and liquid fuels. Gasification units in electric power plants produce a fuel gas to drive gas turbines.
Therefore, the urgent needs to produce fuels and chemical products from syngas prompt the study of this thermochemical process. The coal gasification in entrained flow reactors with steam and/or oxygen produces synthesis gas (syngas), which is a mixture of mostly hydrogen and carbon monoxide. However, the use of coal faces several challenges such as clean and efficient energy systems, the challenge of carbon storage and sequestration, and the environmental impacts due to the mining. It is predicted that coal will continue to play an important role in meeting the world’s increasing energy demands in the foreseeable future. IntroductionĬoal is a major source of energy, accounting for ~25% of the world energy supplies and ~40% of the world electricity generation. Thus, the proposed model is considered as a versatile and useful computational tool to study and optimize the coal to SNG process. Simulations results are compared against available technical data with good accuracy. However, feeding technology clearly has an effect on the process due to the gasifying agent. It was found that coal rank does not significantly affect energy indicators such as cold gas, process, and global efficiencies.
Emphasis is put on interactions between the fuel feeding technology and selected energy output parameters of coal-SNG process, that is, energy efficiencies, power, and SNG quality. Two typical technologies used in entrained flow gasifiers such as coal dry and coal slurry are modeled and simulated.
#ASPEN HYSYS V8.6 DOWNLOAD ENGINEERING GROUP PLUS#
The model was developed using a complete and comprehensive Aspen Plus model.
#ASPEN HYSYS V8.6 DOWNLOAD ENGINEERING GROUP FREE#
In this work, the process to produce SNG by means of coal-entrained flow gasifiers is modeled under thermochemical equilibrium with the Gibbs free energy approach. The production of synthetic or substitute natural gas (SNG) from coal is a process of interest in Colombia where the reserves-to-production ratio (R/P) for natural gas is expected to be between 7 and 10 years, while the R/P for coal is forecasted to be around 90 years.