scholarly journals Process Simulation and Exergy Analysis of a Mercaptan Oxidation Unit in a Latin American Refinery

ACS Omega ◽  
2020 ◽  
Vol 5 (34) ◽  
pp. 21428-21436
Author(s):  
Rayme Mestre-Escudero ◽  
Alejandro Puerta-Arana ◽  
Ángel Darío González-Delgado
Keyword(s):  
Latin American ◽  
Process Simulation ◽  
Exergy Analysis ◽  
Mercaptan Oxidation

Revamping, Energy Efficiency, and Exergy Analysis of an Existing Upstream Gas Treatment Facility

2011 ◽  
Vol 133 (1) ◽  
Author(s):  
Michele Margarone ◽  
Stefano Magi ◽  
Giuseppe Gorla ◽  
Stefano Biffi ◽  
Paolo Siboni ◽  
...  
Keyword(s):  
Process Simulation ◽  
Figure Of Merit ◽  
Exergy Analysis ◽  
Oil And Gas ◽  
State Of The Art ◽  
Treatment Facility ◽  
Gas Treatment ◽  
Return Times ◽  
Treatment Facilities ◽  
The One

Surface oil and gas treatment facilities in service for decades are likely to be oversized due to the natural depletion of their reservoirs. Despite these plants might have been designed modularly, meaning they comprise multiple identical units serving the same task, such units operate often in conditions far from the design. This work analyzes the revamping options of an existing upstream gas facility, chosen because representative of a wide set of plants. It presents a flexible process simulation model, implemented in the HYSYS environment and dynamically linked to an Excel spreadsheet, which includes the performance maps of all turbomachineries and the main characteristics of the investigated modifications. The model may be used to run simulations for various gas input conditions and to predict the performance over 1 year of operation and for different possible future scenarios. The first objective is to assess economically the considered options, which shall be applied only if yielding short return times of the investment since the reservoir is mature. Moreover, all options are appreciated adopting a figure of merit, here defined, that compares the overall energy consumption to the one calculated with state-of-the-art technologies. In addition, exergy and environmental analyses are executed.

scholarly journals Assessment of a Sour Water Treatment Unit Using Process Simulation, Parametric Sensitivity, and Exergy Analysis

ACS Omega ◽  
2020 ◽  
Vol 5 (37) ◽  
pp. 23654-23661
Author(s):  
Rayme Mestre-Escudero ◽  
Alejandro Puerta-Arana ◽  
Ángel Darío González-Delgado
Keyword(s):  
Water Treatment ◽  
Process Simulation ◽  
Exergy Analysis ◽  
Treatment Unit ◽  
Parametric Sensitivity ◽  
Sour Water

scholarly journals Sustainability Outlook of Thermochemical-Based Second-Generation Biofuel Production: Exergy Assessment

2021 ◽  
Vol 11 (19) ◽  
pp. 8851
Author(s):  
Samir Meramo ◽  
Plinio Puello ◽  
Julio Rodríguez
Keyword(s):  
Process Simulation ◽  
Second Generation ◽  
Exergy Analysis ◽  
Mathematical Formulation ◽  
Exergy Efficiency ◽  
Biofuel Production ◽  
Gasification Process ◽  
Bio Oil ◽  
Using Data ◽  
Generation Biofuel

Since the last century, the idea of replacing traditional fossil sources with renewable alternatives has attracted much attention. As a result, auspicious renewable biofuels, such as biohydrogen or bio-oil, have emerged as suitable options. This study provides some knowledge on combining process design, modeling, and exergy analysis as a united framework to support decision making in energy-based projects. The assessment also included a final evaluation, considering sustainability indicators to evaluate process performance. Feedstock selection is crucial for producing bio-oil and hydrogen for process sustainability; this aspect is discussed, considering second-generation sources. Second-generation bio-oil and biohydrogen production are assessed and compared under the proposed framework. Process simulation was performed using ASPEN PLUS. Exergy analysis was developed using data generated in the process simulation stage, containing material and energy balances, thermodynamic properties, chemical reactions, etc. A mathematical formulation for the exergy analysis shows the exergy of utilities, waste, exergy efficiency, and exergy intensity of both processes, based on the same functional unit (1 kg of product). The sustainability evaluation included quantifying side parameters, such as the renewability index, energy efficiency, or global warming potential. The results indicate that pyrolysis obtained the highest resource exergy efficiency (11%), compared to gasification (3%). The exergy intensity shows that more exergy is consumed in the gasification process (4080.21 MJ/kg) than pyrolysis (18.64 MJ/kg). Similar results are obtained for total irreversibility (327.41 vs. 48.75 MJ/kg) and exergy of wastes (51.34 vs. 18.14 MJ/kg).

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