Refrigeration cycles in low-temperature distillation processes for the purification of natural gas

Guido, Giorgia De; Langé, Stefano; Pellegrini, Laura

doi:10.1016/j.jngse.2015.09.041

Cited by 24 publications

(14 citation statements)

References 13 publications

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“…Every segment of heat pump system is designated the corresponding module. The field of chemical industry which ASPEN PLUS is concentrating on and the field of heat pump and refrigeration have common theoretical bases on the fundamental equation of states, transfer equation and constitutive equation of matters [35][36][37].…”

Section: Establishment Of the Simulation Processmentioning

confidence: 99%

Research on a Household Dual Heat Source Heat Pump Water Heater with Preheater Based on ASPEN PLUS

Gou

Shah

et al. 2016

Energies

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This article proposes a dual heat source heat pump bathroom unit with preheater which is feasible for a single family. The system effectively integrates the air source heat pump (ASHP) and wastewater source heat pump (WSHP) technologies, and incorporates a preheater to recover shower wastewater heat and thus improve the total coefficient of performance (COP) of the system, and it has no electric auxiliary heating device, which is favorable to improve the security of the system operation. The process simulation software ASPEN PLUS, widely used in the design and optimization of thermodynamic systems, was used to simulate various cases of system use and to analyze the impact of the preheater on the system. The average COP value of a system with preheater is 6.588 and without preheater it is 4.677. Based on the optimization and analysis, under the standard conditions of air at 25 • C, relative humidity of 70%, wastewater at 35 • C, wastewater flow rate of 0.07 kg/s, tap water at 15 • C, and condenser outlet water temperature at 50 • C, the theoretical COP of the system can reach 9.784 at an evaporating temperature of 14.96 • C, condensing temperature of 48.74 • C, and preheated water temperature of 27.19 • C.

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Section: Establishment Of the Simulation Processmentioning

confidence: 99%

Research on a Household Dual Heat Source Heat Pump Water Heater with Preheater Based on ASPEN PLUS

Gou

Shah

et al. 2016

Energies

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“…On the other hand, concerning fossil fuels, the increasing natural gas consumption has made sour and ultrasour reserves worthy of consideration for exploitation [4]. Data show that 40% of the available reserves are classified as sour, and 10% of them have a CO 2 content higher than 10 mol.% [5], which can exceed 70% in some gas fields [6,7].…”

Section: Introductionmentioning

confidence: 99%

New Solvents for CO2 and H2S Removal from Gaseous Streams

et al. 2021

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Acid gas removal from gaseous streams such as flue gas, natural gas and biogas is mainly performed by chemical absorption with amines, but the process is highly energy intensive and can generate emissions of harmful compounds to the atmosphere. Considering the emerging interest in carbon capture, mainly associated with increasing environmental concerns, there is much current effort to develop innovative solvents able to lower the energy and environmental impact of the acid gas removal processes. To be competitive, the new blends must show a CO2 uptake capacity comparable to the one of the traditional MEA benchmark solution. In this work, a review of the state of the art of attractive solvents alternative to the traditional MEA amine blend for acid gas removal is presented. These novel solvents are classified into three main classes: biphasic blends—involving the formation of two liquid phases, water-lean solvents and green solvents. For each solvent, the peculiar features, the level of technological development and the main expected pros and cons are discussed. At the end, a summary on the most promising perspectives and on the major limitations is provided.

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“…Different technologies are currently available for CO 2 removal from flue gases, including chemical (De Guido et al, 2018) and physical absorption, adsorption (Gutierrez-Ortega et al, 2017), permeation through membranes (Leimbrink et al, 2015) L. Pellegrini et al and low-temperature or commonly referred to as "cryogenic" separation. Recently, a great attention has been devoted to cryogenic separation methods for application not only to natural gas purification (De Guido et al, 2015) and biogas upgrading (Pellegrini et al, 2017), but also to nitrogen rejection (De Guido et al, 2019) and CO 2 capture from flue gas. When this last application is considered, the separation process aims at reducing the flue gas temperature from ambient to a low temperature range at which CO 2 freezes out and can be removed from the main gas stream in a solid phase.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Framework for Cryogenic Carbon Capture

Pellegrini

Guido

Ingrosso

2020

Computer Aided Chemical Engineering

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Carbon dioxide capture and storage (CCS) is an important option for climate change mitigation and it has been extensively analysed in recent years to face the climate challenge.A portion of the emitted CO 2 comes from fossil fuel power plants. Several post-combustion technologies are available for separating CO 2 from the flue gases produced by the combustion of fossil fuels. In recent years, low-temperature/cryogenic technologies (e.g., CO 2 capture by anti-sublimation) have been investigated for this purpose, which rely on the fact that CO 2 can be separated out of flue gas by freezing it out. As a consequence, when dealing with the design of this type of processes, it is of paramount importance to be able to satisfactorily predict the thermodynamic phase behaviour of the system of interest, which involves equilibrium conditions also in the presence of solid CO 2 .The classical approach for phase equilibria calculations involving a solid phase is based on the equality of components' fugacities in the different phases and on the use of an expression for the fugacity of the freezing component in the solid phase that can be derived by relating it to its fugacity in the vapor phase following a proper thermodynamic cycle. This work compares the predictions for solid-vapor equilibria (SVE) conditions of a flue gas mixture that are obtained using such a classical approach with those obtained using the RGibbs calculation block available in Aspen Plus ® process simulator. The latter one enables SVE calculations by minimizing the Gibbs energy. The obtained results are useful for determining suitable operating conditions for the separation process, depending on the desired level of CO 2 recovery to be achieved.

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Refrigeration cycles in low-temperature distillation processes for the purification of natural gas

Cited by 24 publications

References 13 publications

Research on a Household Dual Heat Source Heat Pump Water Heater with Preheater Based on ASPEN PLUS

Research on a Household Dual Heat Source Heat Pump Water Heater with Preheater Based on ASPEN PLUS

New Solvents for CO2 and H2S Removal from Gaseous Streams

Thermodynamic Framework for Cryogenic Carbon Capture

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