Advances in distillation: Significant reductions in energy consumption and carbon dioxide emissions for crude oil separation

Mathew, Tony Joseph; Narayanan, Sundar; Jalan, Amrit; Matthews, Logan R.; Gupta, Himanshu; Billimoria, Rustom; Pereira, Carla; Goheen, Chris; Tawarmalani, Mohit

doi:10.1016/j.joule.2022.10.004

Cited by 11 publications

(6 citation statements)

References 30 publications

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“…While the two separations analyzed in this work are academic, in a separate work of ours we identified new configurations for an industrial crude petroleum separation (where the latent heats vary widely) using a variety of modeling advances, among them being the variable transformation presented in this work. 39 We derived several new analytical results in distillation, such as cumulative latent-heat fractions having monotonic profiles within a column and the ratios of cumulative latent-heat fractions on consecutive stages decreasing for heavier components. We analytically proved that the average molar latent heat increases and vapor and liquid molar flow rates decrease down the stages of a column, and that cumulative mole fractions have monotonic profiles also in the CHT framework.…”

Section: Discussionmentioning

confidence: 99%

“…With another example, we demonstrated how the CHT framework can be applied on such shortcut models to identify a heat duty efficient candidate with heat integration. While the two separations analyzed in this work are academic, in a separate work of ours we identified new configurations for an industrial crude petroleum separation (where the latent heats vary widely) using a variety of modeling advances, among them being the variable transformation presented in this work 39 …”

Section: Discussionmentioning

confidence: 99%

“…For example, Kong and Maravelias 12 used a scaled version of the transformation in a part of their optimization model, and we applied the transformation in a separate work to optimize heatintegrated crude petroleum configurations. 39 In Appendix B in Data S1, we discuss how we adapted the heat integration constraints in our formulation when applying the latent-heat transformation. F I G U R E 3 Q min diagram for the four-component paraffins feed discussed in Table 1, using f LH and α fitted .…”

Section: Simulation or Optimization Of Shortcut Models: Fidkowski Andmentioning

confidence: 99%

“…When the model has other types of equations present, such as when minimizing total cost or integrating with other unit operations, 33‐38 then additional modifications may be required to maintain the validity of the model after applying the transformation. For example, Kong and Maravelias 12 used a scaled version of the transformation in a part of their optimization model, and we applied the transformation in a separate work to optimize heat‐integrated crude petroleum configurations 39 . In Appendix B in Data S1, we discuss how we adapted the heat integration constraints in our formulation when applying the latent‐heat transformation.…”

Section: Applications Of the Latent‐heat Transformationmentioning

confidence: 99%

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Relaxing the constant molar overflow assumption in distillation optimization

Mathew

Tawarmalani

2023

AIChE Journal

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The constant molar overflow (CMO) framework, while useful for shortcut distillation models, assumes that all components have the same latent heats of vaporization. A simple transformation, from molar flows to latent‐heat flows, allows shortcut models to retain the mathematical simplicity of the CMO framework while accounting for different latent heats, resulting in the constant heat transport (CHT) framework for adiabatic distillation columns. Although several past works have already proposed this transformation in the literature, it has not been well utilized in recent times. In this article, we show the utility of this transformation in upgrading various applications such as identifying energy‐efficient multicomponent distillation configurations based on heat duty rather than surrogate vapor flow. The method transforms the diagram to a diagram. Furthermore, we derive new and insightful analytical results in distillation, such as cumulative latent‐heat stage fractions having monotonic profiles within a distillation column under the CHT framework.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Simulation or Optimization Of Shortcut Models: Fidkowski Andmentioning

confidence: 99%

Section: Applications Of the Latent‐heat Transformationmentioning

confidence: 99%

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Relaxing the constant molar overflow assumption in distillation optimization

Mathew

Tawarmalani

2023

AIChE Journal

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“…The effects of global climate change caused by massive greenhouse gas emissions are of increasing concern to government agencies and researchers around the world [1]. Therefore, numerous strategies such as the use of renewable energy sources to replace fossil fuels [2], improved energy efficiency [3], increased soil carbon reserves [4,5], carbon dioxide (CO 2 ) sequestration [6], and some other approaches [7][8][9] have been proposed to mitigate these causes and their effects. In China, the heavy reliance on coal makes it difficult for the country to change its energy mix in the short term; however, in response to President Xi Jinping's dual carbon goal (carbon peak and carbon neutrality), China is exploring various options to achieve decarbonization.…”

Section: Introductionmentioning

confidence: 99%

Changes in Physicochemical Properties of Coal and Their Mechanism Due to Supercritical CO2–H2O Treatment

Chen,

Zhang,

et al. 2023

Minerals

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The dissolution of supercritical carbon dioxide (ScCO2) in water forms a ScCO2–H2O system, which exerts a transformative influence on the physicochemical characteristics of coal and significantly impacts the CO2-driven enhanced coalbed methane (CO2-ECBM) recovery process. Herein, the effect of ScCO2–H2O treatment on the physicochemical properties of coal was simulated in a high-pressure reactor. The migration of major elements, change in the pore structure, and change in the CH4 adsorption capacity of coal after the ScCO2–H2O treatment were detected using plasma emission spectroscopy, the low-temperature liquid nitrogen adsorption method, and the CH4 adsorption method, respectively. The results show that (1) the ScCO2–H2O treatment led to mineral reactions causing a significant migration of constant elements in the coal. The migration of Ca ions was the most significant, with an increase in their concentration in treated water from 0 to 16–970 mg·L−1, followed by Na, Mg, and K. Al migrated the least, from 0 to 0.004–2.555 mg·L−1. (2) The ScCO2–H2O treatment increased the pore volume and pore-specific surface area (SSA) of the coal via the dissolution and precipitation of minerals in the coal pores. The total pore volume increased from 0.000795–0.011543 to 0.001274–0.014644 cm3·g−1, and the total pore SSA increased from 0.084–3.332 to 0.400–6.061 m2·g−1. (3) Changes in the CH4 adsorption capacity were affected by the combined effects of a mineral reaction and pore structure change. The dissolved precipitates of the minerals in the coal pores after the ScCO2–H2O treatment caused elemental migration, which not only decreased the mineral content in the coal pores but also increased the total pore volume and total pore SSA, thus improving the CH4 adsorption capacity of the coal. This study provides theoretical support for CO2 sequestration and ECBM recovery.

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Intensification proposals for the downstream separation of the methanol-to-olefins process

Andrade,

Rebouças

et al. 2024

Chemical Engineering and Processing - Process Intensification

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Advances in distillation: Significant reductions in energy consumption and carbon dioxide emissions for crude oil separation

Cited by 11 publications

References 30 publications

Relaxing the constant molar overflow assumption in distillation optimization

Relaxing the constant molar overflow assumption in distillation optimization

Changes in Physicochemical Properties of Coal and Their Mechanism Due to Supercritical CO2–H2O Treatment

Intensification proposals for the downstream separation of the methanol-to-olefins process

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