Critical review on wax deposition in single-phase flow
Autor: | Antonio Carlos Bannwart, Letícia Bizarre, Charlie van der Geest, Aline Melchuna, Vanessa C. Bizotto Guersoni |
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Rok vydání: | 2021 |
Předmět: |
Computer science
Research areas Heuristic 020209 energy General Chemical Engineering Organic Chemistry Flow (psychology) Energy Engineering and Power Technology 02 engineering and technology Wax deposition Fuel Technology 020401 chemical engineering 0202 electrical engineering electronic engineering information engineering Biochemical engineering 0204 chemical engineering Single phase Mechanism (sociology) |
Zdroj: | Fuel. 293:120358 |
ISSN: | 0016-2361 |
Popis: | Wax deposition is a costly problem for the O & G industry, especially for pipelines in cold environments. For at least three decades, the scientific community has overwhelmingly agreed that molecular diffusion is the main mechanism for wax deposition. There are, however, severe problems with models based on molecular diffusion. They rely on untested hypotheses and several empirical correlations; hence, they can hardly predict the experimental data from laboratory. For real fields, the prediction is no better than an educated guess – heuristic solutions. Several research areas in wax deposition need to be better understood, and these are discussed in detail here, with a highlight to the most important concern: the controlling mechanism. Is wax deposition indeed a mass transfer controlled phenomenon? What is the evidence supporting this “general knowledge”? Is it possible that, for some conditions, mass transfer is dominant, and for others, the phase transition mechanism is dominant? Apart from this, we also discuss other issues: the accuracy of empirical correlations for diffusivity, the behavior of crystals in the deposit and how that influences the general deposit behavior, non-Newtonian influence on heat transfer and mass transfer, among others. Wax deposition is a complex topic that has been reviewed over and over. In this review, however, we focus on both presenting what has been discussed in the literature and make a critical analysis. The goal is to increase the general knowledge by highlighting a number of gaps and challenges related to this complex and financially exorbitant issue. |
Databáze: | OpenAIRE |
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