Multiple steady states in reactive distillation: kinetic effects

Chen, Fengrong; Huss, Robert S.; Doherty, Michael F.; Malone, Michael F.

doi:10.1016/s0098-1354(01)00750-5

Cited by 83 publications

(75 citation statements)

References 46 publications

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“…The control degrees of freedom vis-à-vis conventional processes is reduced so that the separation and reaction extent must be regulated using fewer available inputs. The operability and control issue is further compounded by the existence of multiple steady-states that are routine phenomena in RD systems (Chen et al (2002); Ciric and Miao (1994); Jacobs and Krishna (1993); Sneesby et al (1998)). Formulating the best operating strategy can be quite complex and nonintuitive.…”

Section: Introductionmentioning

confidence: 99%

Steady-state analyses for reactive distillation control: An MTBE case study

Singh¹,

Singh²,

Kumar³

et al. 2005

Journal of Loss Prevention in the Process Industries

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Section: Introductionmentioning

confidence: 99%

Steady-state analyses for reactive distillation control: An MTBE case study

Singh¹,

Singh²,

Kumar³

et al. 2005

Journal of Loss Prevention in the Process Industries

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“…There is a rich literature on catalytic and reactive distillation and several process applications. Nevertheless, a large gap remains between academic analysis (Sundmacher et al, 1994;Thiel et al, 1997;Bessling et al, 1998;Lee and Dudukovic, 1998;Xu and Dudukovic, 1999;Venimadhavan et al, 1999;Chen et al, 2000Chen et al, , 2002Kenig et al, 2001;Stitt, 2002;Sundmacher and Kienle, 2003) of the combined reaction-distillation process and practical implementations (Smith and Arganbright, 2000;Hearn et al, 2002;Smith et al, 2003;Smith and Adams, 2006). There is resistance to replacing depreciated working equipment with new, more improved installations.…”

Section: Process Intensificationmentioning

confidence: 99%

Challenges and Innovations in Reaction Engineering

Duduković

2008

Chemical Engineering Communications

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The importance of reaction engineering in generating a myriad of products on which developed societies depend is outlined. The challenges of a political, economic, and technical nature that need to be addressed in rendering conversion of raw materials into desired products that are more environmentally friendly and sustainable are briefly discussed. It is shown that multiphase reactors are prevalent in all applications, and improvements in the reactor material and energy efficiencies lead to more environmentally benign processes. This requires, in addition to the selection of green process chemistry, systematic implementation of the multi-scale reaction engineering methodology to accomplish proper reactor type selection and scaleup for commercial applications. It is also illustrated that recent innovations in multiphase reaction engineering basically utilize two key concepts: process intensification (e.g., enhancement in mass and heat transfer rates) and simultaneous reaction and separation. Examples of these are discussed, such as micro-reactors, reactive distillation, etc. It is also shown that commercialization of bench-scale discoveries requires either scaleup in parallel or vertical scaleup. New tools for visualization of opaque multiphase flows and development of appropriate rational phenomenological multiphase reactor models for scaleup and design are also briefly discussed.

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“…Also, these results show how the concavity, which indicates the presence of multiplicity, is accentuated at low reflux ratios and, if this parameter increases, the multiplicity is gradually disappearing. In particular, Eldarsi and Douglas [31] and Chen et al [15] have also reported that the ranges of reflux ratio for multiple solutions are sensitive to the column operating conditions for MTBE synthesis. Note that the reflux ratio affects the process performance because it has a significant impact on the separation capability of the reactive distillation column and, consequently, it is an indirect variable to study the effects of the vapor and liquid flows on the presence of multiple solutions.…”

Section: Multiplicity In the Reactive System For The Production Of Mtbementioning

confidence: 99%

Process Intensification

VandenBussche¹

2007

Micro Instrumentation

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a b s t r a c tA systematic study of the operating conditions and parameter sensibility of multiple steady states in a reactive distillation column for production of fuel ethers is presented. The multiplicity analysis is performed using bifurcation diagrams for several scenarios using the process simulator Aspen One Aspen Plus. Our results indicate that the main variables that affect both the presence and behavior of multiple solutions in the reactive distillation column are the reflux ratio, the reboiler duty and the thermal condition in the feed stream. In particular, we have determined that the vapor-liquid stream in the feed has a major influence on the occurrence of this phenomenon and this parameter especially establishes the type of multiplicity that can occur in the reactive distillation column for production of fuel ethers.

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Multiple steady states in reactive distillation: kinetic effects

Cited by 83 publications

References 46 publications

Steady-state analyses for reactive distillation control: An MTBE case study

Steady-state analyses for reactive distillation control: An MTBE case study

Challenges and Innovations in Reaction Engineering

Process Intensification

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