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Technical groups, follow aiche, (733d) case study on the application of aspen hysys to simulate and optimise the process of plastics for the production of fuels, aiche annual meeting, 2016 aiche annual meeting, environmental division, fundamentals and applications for municipal solid waste treatment and valorization, thursday, november 17, 2016 - 4:30pm to 4:55pm, authors .
However, the main problem facing plastics pyrolysis research is the complexity of the process with enormous numbers of reactions and hence, there are no models available to describe the complete process. Even that several models (mostly kinetic models) have been developed to describe this process, they have been unsuccessful. Overall, the lack of comprehensive understanding of this process dissuades its transformation into a profitable industry. The main aim of the project is to contribute to pollution prevention and treatment of plastic wastes by providing a valuable mechanism that will improve the research on plastics pyrolysis.
Low-density polyethylene (LDPE) is a type of polyolefin plastic, which is a common domestic plastic waste. Polyolefins account for 57% of the total amount of plastics present in household waste, of which polyethylene is the most abundant type of this group. The objectives of this project are to create hypo components that represent real LDPE, to design an effective and a complete computer-based modelled process that can simulate an actual LDPE pyrolysis process, to establish a method for predicting the pyrolysis products of LDPE with great accuracy, to determine the optimum operating conditions of LDPE pyrolysis for the production of liquid hydrocarbons for fuel generation and to predict the energy requirements for LDPE pyrolysis process.
In this study, two simulation frameworks were proposed in order to design and evaluate the pyrolysis process of low-density polyethylene to produce liquid hydrocarbons that are suitable for fuel production. The first simulation framework (Simple Model) was based on a simplified pyrolysis process where the products were combined into three groups (gas, oils and char), whilst the second one (Complex Model) was based on a simplified pyrolysis process where the detailed product distribution of the liquid fraction was obtained.
Aspen HYSYS was chosen as the modelling software to design and simulate the two frameworks of LDPE pyrolysis process. Aspen HYSYS is a market-leading process modelling tool for conceptual design and optimisation for oil and gas production, gas processing and petroleum refining industries. Since the products of LPDE pyrolysis process are mainly composed of hydrocarbons, HYSYS is suitable tool to model, predict and estimate the products obtained from this process.
LDPE was firstly developed as a number of hypo components in HYSYS. The software estimation methods were accurate for describing a complex material such as plastic. These components were classified into a number groups due to the variability of the composition of LDPE from plastic to plastic. By using HYSYS, the properties of the simulated plastic could be modified, to meet the experimental properties of the actual plastic either by changing the number groups or by changing their compositions. The created hypo components had properties very close to the real ones and exhibited an accurate behaviour when they undergone the pyrolysis process.
The results obtained from the simulation of the Simple Model agreed with the experimental data. This accuracy allowed for the simulation of the process at temperatures that were not achieved experimentally. The behaviours and properties of the three products of the Simple Model at different temperatures were accurately described. The classification of a large number of hydrocarbons into three different groups and the representation of each group with as a single hydrocarbon did not adversely affect the simulation accuracy of LDPE pyrolysis process. Although the material balances of these components were different from real reactions, the pyrolysis process was simulated with greater accuracy in comparison with published results.
The results of the Complex Model simulation showed a clear improvement compared to those of the Simple Model, whilst maintaining a great agreement with the experimental data. Moreover, the description of the pyrolysis process was more detailed, improving the quality of predicting the compositions of the products. Increasing the number of the products also resulted in a more detailed process flowsheet, providing more complete operational specifications, including the energy duties needed for the LDPE pyrolysis process. Pyrolysis products have different applications and the determination of the optimum application for each product is necessary to increase the profitability of the process. Thus, each component needs to be taken into account and managed accordingly.
It was observed, from the simulation results, that it is possible to describe the LDPE pyrolysis in HYSYS with more accuracy than other methods that have been studied previously. Both simple and complex models were proven to be accurate for simulating LDPE pyrolysis process. Overall, both models had shown their appropriateness to overcome the research challenges of plastics pyrolysis.
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Introduction to Process Modeling using Aspen HYSYS (Includes Sustainability Module)
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Case Study Failure - Hysys
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#1 A_D_M_MII
Junior Member
Posted 11 April 2021 - 07:16 AM
Hi again to everyone,
I have been going forward with my HYSYS project and i have the next question:
I have done a Case study for knowing the flow rate that i need of a current which enters to a vessel in order to get the desired flow rates of steam and liquid at the outlet of the vessel.
The case of study has cenverged but hysys send me the next message:
¨Finished with failed states¨
Do you know what it means and how can i fix it?
The result plot has also a irregular form, so it seems to be incorrect.
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Learn how to set and use case studies on Aspen HYSYS.To have more about chemical process engineering and plant design go to:Instagram: https://www.instagram....
Go back to the Case Studies Page (actually ... Case Studies in HYSYS apparently solve the entire flowsheet every time. In this case that would mean running an unnecessary column 234 times (from the Number of States in the upper right corner). To shorten your simultation time enormously, open the column's Property View.
Case Studies on HYSYS. Report this article ... So, in a case study you have independent and dependent variables. The Independent variable is the temperature of stream 2, because we'll variate it ...
This video is about the simulation of the different types of case studies in Aspen HYSYS. The case studies are Sensitivity, Nested, Discrete, and Base& Shift...
Learn How to make case study in Aspen Hysys
The aim of the first case study is to demonstrate the capability of the automation process by sending specific values to the simulator and collecting data from it once the case is converged. ... Data shown in this figure can be used for constructing the Aspen HYSYS case. Peng-Robinson was considered as the fluid package. Figure 1. Open in ...
her A or BIn Aspen HYSYS, when a flowsheet contains several recycle blocks, it is difficult to know simply by examining the topology what the ideal placement and configuration of the recyc. e would be. User can run the Recycl. Advisor; Statement (1) To ensure that flowsheets contain the minimum number of recycles at their optima.
Aspen HYSYS is a market-leading process modelling tool for conceptual design and optimisation for oil and gas production, gas processing and petroleum refining industries. Since the products of LPDE pyrolysis process are mainly composed of hydrocarbons, HYSYS is suitable tool to model, predict and estimate the products obtained from this process.
Using a simulation case study tool [26], the yield of the main products in the FCC unit is calculated, where each figure expresses specific phenomena. Figure 4a illustrates that the yield of ...
To create the Case Study follow the steps: Click the Case Studies button in the Home tab of the HYSYS ribbon or from the Navigation Pane select the Case Studies folder and click the add button. On the Case Study form, select the Variables Selection tab. In the Independent Variables section, click the Find Variables button.
Perform Spreadsheet calculations in Aspen HYSYS Use the Case Study feature to run flowsheet-wide scenarios Workshop: Use the Assay Management tools to characterize a crude assay, then employ the Spreadsheet and Case Study features to determine how Gas-Oil Ratio (GOR) varies with operating pressure Two Stage Compression
The case Study tool lets you monitor the steady stateresponse of key variables to changes in your process. With the help of a case study tool, you can optimi...
I think the most useful of the DataBook tools, the Case Study allows you to quickly vary key process variables across a range and observe the effect on other key process variables. While you may choose any number of independent and dependent variables for the Case Study, HYSYS will only plot a maximum of three variables at a time.
Aspen HYSYS and Minitab to carry out the production of palmitic acid methyl ester, which is also a biodiesel. Ibrahim and Maraire [45] also used Aspen HYSYS to carry out the production of biodiesel from waste cooking oil. Tuluc et al. [46] carried out simulation and optimisation study for biodiesel synthesis process based on
The process conditions, flow rates and purge/recycle values are summarized in Table 1. The fresh hydrocarbon/steam ratio into the reactor is 2.67 and after tail gas recycling the overall value of ...
An Aspen Certified Expert User in Aspen HYSYS demonstrates skills required to build complex models associated to ... You can use it as both a study tool and an on-the job reference (read pages 2-3). ... Configure case studies using variables from the acid gas unit operations
COURSE LINK:https://www.chemicalengineeringguy.com/courses/aspen-hysys-basic-course/Welcome to the Aspen HYSYS Basic Process Modeling Course!The BASIC Aspen ...
Case Studies Once a model has calculated results, you can change your workspace to easily conduct case studies. Quickly and easily ... In V8.8, you have an option to convert a HYSYS case which includes a DBR Amine fluid package or an Amines Pkg fluid package, to the new Acid Gas package for gas treating. The old case is saved as a backup and
Case Study In Hysys - posted in Chemical Process Simulation: I would like to simulate the effect of change in feed composition on purity ( steady state) . I defined the reflux ratio and the distillate draw rate as specs. Next I created a case study , and I am trying to define the feed composition as independent and product purity as a dependent variable .But the feed composition is always ...
Perform Spreadsheet calculations in Aspen HYSYS Use the Case Study feature to run flowsheet-wide scenarios Workshop: Use the Assay Management tools to characterize a crude assay, then employ the Spreadsheet and Case Study features to determine how Gas-Oil Ratio (GOR) varies with operating pressure Two Stage Compression
25 Jul 2024. Aspne Hysys Case Study Issues - posted in Chemical Process Simulation: Hi, I have a simulation file with some adjust, recycle and set functions going on. The convergance criteria is somewhat strict, but it converges quite fast as long as the input variables is not changed too much. I have quite a lot of design cases to look into ...
Right physical properties data is crucial for successful design. Usually, they are taken from thermodynamics books and physical properties encyclopedia which...
25 Jul 2024. Guidelines / Rules for Posting. Case Study Failure - Hysys - posted in Student: Hi again to everyone, I have been going forward with my HYSYS project and i have the next question: I have done a Case study for knowing the flow rate that i need of a current which enters to a vessel in order to get the desired flow rates of steam and ...