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Simulation and designing of methanol production plant based on the synthesis gas

Babazadeh, F ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. Publisher: 2006
  3. Abstract:
  4. Regarding the energy and environment crisis in the current century and future that threatens human communities, necessity of study and use of supplement fuels is felt more than before. Consumption of natural gas has been increasing rapidly making it one of the most important energy resources in the world. During the last decade the consumption of natural gas increased by almost 25%. By 2020 natural gas is predicted to increase its world energy share to as much as 50% from the present of 22%. The scale of its reserves and its environmental advantage favor its use, (the lower carbon emissions compared to oil and coal along with other reduced emissions of nitrogen oxides and particulates) for fast growing activities such as the precision industries and the generation of electricity. During the twenty last years, natural gas reserves have increased about twice. Industry and academic have been pursuing the chemical conversion of natural gas to higher valued products. Potential process routes include the manufactory of olefins and chemical intermediates, methanol, DME, ethylene, gasoline and distillate fuels. In this project simulation stage has been studied by Hysys software And Aspen Engineering Suite software collection Such as Aspen-Plus, Aspen-B-Jac, Aspen-Pinch,... for forecasting of operation conditions of plant against new conditions and operation conditions of equipment. The primary simulation in Aspen plus software done for comparison of various equations of state. Hence, for preparation of one reliable and exact model, the primary prepared model studied for different kinds of Equations of state, activity coefficient and calculation methods of Equilibrium constant in existing simulator software bed. In addition, the best state of lower percent of deviation and error is selected. Designing methanol production plant on the basis of reactor simulation is achieved by using the compatibility between simulation data and empirical data relevant to the industrial unit. The constants of the kinetic model were adjusted according to empirical data and as a result the suitable kinetic model was obtained. The design of the reactors was done on the basis of reactor simulation and the values equivalency for reactor diameter height and the value equivalent for catalyst weight were calculated. Each reactor consists of two series of catalyst bed on the account of flexibility of reactor operation, each bed is considered to be in one reactor that makes a total of 4 reactors. Aspen_B_Jac software has been used in order to design the pilot heat exchangers. Other data required in order to complete the design are data related to control philosophy, process description, equipment list & instrument index, process flow diagrams (PFD, P&ID) and general philosophy of pilot safety
  5. Keywords:
  6. Chemical industry ; Computer simulation ; Energy resources ; Fuel consumption ; Natural gas ; Nitrogen oxides ; Synthesis gas ; Chemical intermediates ; Distillate fuels ; Potential process ; Methanol
  7. Source: CHISA 2006 - 17th International Congress of Chemical and Process Engineering, Prague, 27 August 2006 through 31 August 2006 ; 2006 ; 8086059456 (ISBN); 9788086059457 (ISBN)