Carrero-Parreño, A;
Onishi, VC;
Salcedo-Díaz, R;
Ruiz-Femenia, R;
Fraga, ES;
Caballero, JA;
Reyes-Labarta, JA;
(2017)
Optimal Pretreatment System of Flowback Water from Shale Gas Production.
Industrial & Engineering Chemistry Research
, 56
(15)
pp. 4386-4398.
10.1021/acs.iecr.6b04016.
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Abstract
Shale gas has emerged as a potential resource to transform the global energy market. Nevertheless, gas extraction from tight shale formations is only possible after horizontal drilling and hydraulic fracturing, which generally demand large amounts of water. Part of the ejected fracturing fluid returns to the surface as flowback water, containing a variety of pollutants. For this reason, water reuse and water recycling technologies have received further interest for enhancing overall shale gas process efficiency and sustainability. Water pretreatment systems (WPSs) can play an important role for achieving this goal. This paper introduces a new optimization model for WPS simultaneous synthesis, especially developed for flowback water from shale gas production. A multistage superstructure is proposed for the optimal WPS design, including several water pretreatment alternatives. The mathematical model is formulated via generalized disjunctive programming (GDP) and solved by re-formulation as a mixed-integer nonlinear programming (MINLP) problem, to minimize the total annualized cost. Hence, the superstructure allows identifying the optimal pretreatment sequence with minimum cost, according to inlet water composition and wastewater-desired destination (i.e., water reuse as fracking fluid or recycling). Three case studies are performed to illustrate the applicability of the proposed approach under specific composition constraints. Thus, four distinct flowback water compositions are evaluated for the different target conditions. The results highlight the ability of the developed model for the cost-effective WPS synthesis, by reaching the required water compositions for each specified destination.
| Type: | Article |
|---|---|
| Title: | Optimal Pretreatment System of Flowback Water from Shale Gas Production |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/acs.iecr.6b04016 |
| Publisher version: | http://dx.doi.org/10.1021/acs.iecr.6b04016 |
| Language: | English |
| Additional information: | Copyright © 2017 American Chemical Society. This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html), which permits copying and redistribution of the article or any adaptations for non-commercial purposes. |
| Keywords: | Global optimization, generalized disjunctive programming (GDP), mixed-integer nonlinear programming (MINLP), simultaneous synthesis, shale gas flowback water, water reuse and recycle |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1555560 |
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