Design of dividing wall columns for butanol recovery in a thermochemical biomass to butanol process

Okoli, Chinedu O.; Adams, Thomas A.

doi:10.1016/j.cep.2015.07.002

Cited by 28 publications

(17 citation statements)

References 40 publications

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“…To obtain meaningful guesses, shortcut methods like V min diagrams can be used [26]. In addition to that, the pressure, number of stages in each section, and one specification for each product stream have to be provided.…”

Section: Simulationmentioning

confidence: 99%

Multiple Dividing‐Wall Columns – Current Status and Future Prospects

Ränger

Preißinger

Grützner

2018

Chemie Ingenieur Technik

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Dividing-wall columns are a well-known and proven technology to separate a ternary mixture into pure products with significant savings in capital and operational costs compared to standard two-column configurations. A consequent advancement are multiple dividing-wall columns, which allow the separation of multicomponent mixtures in one column shell. However, due to their high complexity, no practical realization has been reported yet. This paper briefly discusses the current state of the art followed by a detailed description of a robust initialization of rigorous flow sheet simulations based on V min diagrams. With the data from the simulation a multi-objective optimization can be performed. The knowledge from the simulations shall be used to build the first multiple dividing-wall column worldwide.

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Section: Simulationmentioning

confidence: 99%

Multiple Dividing‐Wall Columns – Current Status and Future Prospects

Ränger

Preißinger

Grützner

2018

Chemie Ingenieur Technik

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“…It is recommended for multicomponent liquid mixtures that are to be separated into at least three fractions with high purity requirements [10]. For industrial applications, the DWC have led to renewed interest in the design or redesign of many industrial processes, such as a cumene production process [11], a bioethanol plant [12], a butanol recovery process [13], and the ethylbenzene production process [14], due to reductions of the total annual cost (TAC) and energy consumption. Moreover, a combination of reactive distillation and a nonreactive DWC was presented to show the energy saving potential due to less vapor demand [15].…”

Section: Introductionmentioning

confidence: 99%

Economic and Risk Analyses of an Industrial N,N‐Dimethylformamide Recovery Process

Shi

et al. 2019

Chem Eng & Technol

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The industrial N,N-dimethylformamide (DMF) recovery plant is usually based on a two-column sequence (TCS) and the capacity of the wastewater treatment process is larger than 2000 kg h -1 . Here, a dividing-wall column (DWC)-based DMF recovery plant is proposed. The DWC avoids the remixing effect and reduces the utility duties by about 18.1 % and the CO 2 emissions by 15.2 %, compared to the TCS. The DWC effectively decreases the total annual cost by 3.4 % compared to that of the TCS and achieves a profitability index of 2.19 and an internal rate of return of 40.45 %. By Monte Carlo risk analysis, the DWC can increase the chance of earning the profit by up to 16 % compared to the TCS.

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“…Ling et al studied the steady‐state behavior of a Kaibel column for separating a mixture of aromatics and a control structure with five composition control loops was established . Okoli and Adams compared different DWC configurations to separate a multicomponent mixture in a biobutanol synthesis process and stated that the Kaibel column provided 31 % savings in operating costs and 28 % savings in total annual cost (TAC) .…”

Section: Introductionmentioning

confidence: 99%

Remixing Analysis of Four‐Product Dividing‐Wall Columns

et al. 2018

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Dividing-wall columns can separate multicomponent mixtures and offer large energy savings over conventional column sequences. The separation of a mixture of four alcohols was studied in a Kaibel column and a fully extended Petlyuk column or Sargent arrangement, respectively. The flow paths of intermediates are different so that the Sargent arrangement could save more energy. Remixing of intermediates is unavoidable in the Kaibel column because each of them cannot detour all around both ends of the dividing wall. The Sargent arrangement exhibits the desired detouring paths and the remixing of intermediates is alleviated but still occurs in the prefractionator and the middle column. Finally, an alternative configuration of the Sargent arrangement is proposed which presents a better thermodynamic efficiency.

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Design of dividing wall columns for butanol recovery in a thermochemical biomass to butanol process

Cited by 28 publications

References 40 publications

Multiple Dividing‐Wall Columns – Current Status and Future Prospects

Multiple Dividing‐Wall Columns – Current Status and Future Prospects

Economic and Risk Analyses of an Industrial N,N‐Dimethylformamide Recovery Process

Remixing Analysis of Four‐Product Dividing‐Wall Columns

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