Production of Isooctane from Isobutene: Energy Integration and Carbon Dioxide Abatement via Catalytic Distillation

Goortani, Behnam Mostajeran; Gaurav, Aashish; Deshpande, Alisha; Ng, Flora T. T.; Rempel, Garry L.

doi:10.1021/ie5032056

Cited by 38 publications

(23 citation statements)

References 18 publications

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“…CD ( Figure 2) is a green reactor technology which integrates chemical reaction and product separation into a single operation [21]. The distinctive feature of CD to simultaneously carry out the chemical reaction and product separation within a single stage operation could bring significant energy savings as well as a reduction in operating and capital expenditures due to process intensification [7,22]. CD also offers an efficient solution to many process constraints enhancing the process efficiency [21,23,24].…”

Section: Introductionmentioning

confidence: 99%

A new green process for biodiesel production from waste oils via catalytic distillation using a solid acid catalyst – Modeling, economic and environmental analysis

Gaurav

Rempel

2016

Green Energy & Environment

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The challenges in the chemical processing industry today are environmental concerns, energy and capital costs. Catalytic distillation (CD) is a green reactor technology which combines a catalytic reaction and separation via distillation in the same distillation column. Utilization of CD in chemical process development could result in capital and energy savings, and the reduction of greenhouse gases. The efficacy of CD and the economic merits, in terms of energy and equipment savings, brought by CD for the production of biodiesel from waste oil such as yellow grease is quantified. Process flow sheets for industrial routes for an annual production of 10 million gallon ASTM purity biodiesel in a conventional process (reactor followed by distillation) and CD configurations are modeled in Aspen Plus.Material and energy flows, as well as sized unit operation blocks, are used to conduct an economic assessment of each process. Total capital investment, total operating and utility costs are calculated for each process. The waste oil feedstock is yellow grease containing both triglyceride and free fatty acid. Both transesterification and esterification reactions are considered in the process simulations. Results show a significant advantage of CD compared to a conventional biodiesel processes due to the reduction of distillation columns, waste streams and greenhouse gas emissions. The significant savings in capital and energy costs together with the reduction of greenhouse gases demonstrate that process intensification via CD is a feasible and new green process for the biodiesel production from waste oils.

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Section: Introductionmentioning

confidence: 99%

A new green process for biodiesel production from waste oils via catalytic distillation using a solid acid catalyst – Modeling, economic and environmental analysis

Gaurav

Rempel

2016

Green Energy & Environment

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“…The liquid leaving the last stage of II and III goes to IV and mixes. Concentration and temperature remain unchanged after splitting [17] for split streams. Figure 6.…”

Section: Summary Equationsmentioning

confidence: 99%

“…We define the degree of mixing above (Equations (17) and (18)). Figures 15 and 16 illustrate the effect of mixing under different liquid split ratios and vapor split ratios.…”

Section: The Effect Of Mixingmentioning

confidence: 99%

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Modeling/Simulation of the Dividing Wall Column by Using the Rigorous Model

et al. 2019

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Dividing wall column (DWC) is an atypical distillation column with an internal, vertical WE partition wall that effectively accommodates two conventional distillation columns into one to improve the thermodynamic efficiency. In previous studies, different equivalent models by combining conventional columns are adopted to approximate the DWC modeling, which may not well describe the integration of the DWC; moreover, the computational cost increases when multiple columns are implemented to represent one DWC. In this paper, a rigorous mathematical model is proposed based on the mass balance, the energy and phase equilibrium of the DWC, where decision variables and state variables are equally treated. The model was developed in the general process modeling system (gPROMS). Based on the rigorous model, the influences of liquid split ratio and vapor split ratio are discussed, and it is shown that the heat duty is sensitive to changes on the liquid and vapor split ratio. Inappropriate liquid and vapor split ratio will increase the mixing effects at both ends of the dividing wall, and adversely affect the thermodynamic efficiency. Hence, the degree of mixing is defined to characterize the column efficiency. Furthermore, the middle component split ratio at the top of the pre-fractionator has an optimal point for better energy saving with certain liquid and vapor split ratios, and can be used as an indicator for the energy performance. Finally, the model was tested and validated against literature data by using the ternary benzene–toluene–xylene mixture system as a case study.

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“…This software is mainly utilized in oil and gas research sector [7]. Together with Multiflash and material properties data banks, this software is equation-oriented and allows user to write appropriate equations and solve them in a simultaneous manner by assuming variable physical and thermodynamic properties of the materials.…”

Section: Modeling Solar Absorption Chillermentioning

confidence: 99%

Solar Concentrated Energy Supply to Water-Ammonia Absorption Refrigerators

Goortani¹,

Alghorayshi²

2017

Proceedings of the 4th International Conference of Fluid Flow, Heat and Mass Transfer (FFHMT'17)

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-A gPROMS model for concentrated solar absorption chillers is developed. The advantages of a thermal heat storage system in terms of absorbing drastic solar energy change and storing the energy for working overnight and working during cloudy hours are assumed and calculated in a quantitative manner. The project is an ongoing project supported by Iran Office of Vice-presidency for Science and Technology and has broader objective of practical use of large scale linear Fresnel collectors for cooling applications. Consequently, some preliminary studies were performed. A novel dual axis Fresnel collector with overall dimensions of 12.70 cm by 2.30 cm and total mirrors area of 16.5 m 2 is designed and fabricated. A model of receiver, a vacuum tube metal-glass of 20 cm diameter, is first designed and fabricated and tested. CFD modeling with Fluent was utilized to predict velocity and temperature profiles in non-continuous operation mode of the receiver. The profiles of velocity and temperature at receiver angles of 10, 20, 40 and 50 degrees corresponding to the sun elevation angle variations during the year are determined. At the receiver angle of 10 degrees (corresponding to mid-summer), a maximum velocity of 4 cm/s was obtained at the center. The location of this maximum velocity changes toward the wall by increasing the receiver angle.

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Production of Isooctane from Isobutene: Energy Integration and Carbon Dioxide Abatement via Catalytic Distillation

Cited by 38 publications

References 18 publications

A new green process for biodiesel production from waste oils via catalytic distillation using a solid acid catalyst – Modeling, economic and environmental analysis

A new green process for biodiesel production from waste oils via catalytic distillation using a solid acid catalyst – Modeling, economic and environmental analysis

Modeling/Simulation of the Dividing Wall Column by Using the Rigorous Model

Solar Concentrated Energy Supply to Water-Ammonia Absorption Refrigerators

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