Synergy of CO 2 removal and light hydrocarbon recovery from oil-field associated gas by dual-membrane process

Chen, Bo; Ruan, Xuehua; Xiao, Wu; Jiang, Xiaobin; He, Gaohong

doi:10.1016/j.jngse.2015.08.028

Cited by 21 publications

(8 citation statements)

References 46 publications

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“…Dual membrane separator was first proposed in the 1970s, and has since been studied by many researchers [17][18][19][20][21][22][23]. Ohno et al [17] carried out an analytical study of dual membrane separator operating under "perfect mixing" conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Perrin et al [18] established a mathematical model that considered the residual side, and was applicable to three types of flow patterns, which were "perfect mixing", countercurrent flow, and cocurrent flow. Chen et al [19,20] embedded the models of dual membrane separator in the simulator using the User Extension interface of UniSim Design. Then, the dual membrane separator can be used for process simulation.…”

Section: Introductionmentioning

confidence: 99%

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Efficiency Separation Process of H2/CO2/CH4 Mixtures by a Hollow Fiber Dual Membrane Separator

et al. 2020

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Hydrogen purification and CO2 capture are of great significance in refineries and pre-combustion power plants. A dual membrane separator offers an alternative approach for improving H2/CO2 separation efficiency. In this work, H2/CO2/CH4 ternary gas mixtures separation can be achieved by a dual membrane separator with an integrated polyimide (PI) membrane and polydimethylsiloxane/polyetherimide (PDMS/PEI) composite membrane. A hollow fiber dual membrane separation equipment is designed and manufactured. Through the self-designed device, the effects of stage cut, operating temperature, operating pressure, and membrane area ratio on separation performance of dual membrane separator have been studied. The results indicate that, at a high stage cut, a dual membrane separator has obvious advantages over a single membrane separator. Operating temperature has a significant impact on gas permeation rates. At 25 °C, a dual membrane separator can obtain the highest purity of H2 and CO2. By increasing operating pressure, the purity and recovery of H2 and CO2 can be improved simultaneously. The effect of the membrane area ratio on the performance of the dual membrane separator was studied. When the permeate flows of two membranes are approximately equal by changing the membrane area ratio, the overall performance of the dual membrane separator is the best. On the basis of its synergy in promoting separation, the dual membrane separator holds great industrial application potential.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Efficiency Separation Process of H2/CO2/CH4 Mixtures by a Hollow Fiber Dual Membrane Separator

et al. 2020

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“…The accuracy of MemCal was well tested by experimental data in previous studies. 17,19,21 By the aid of MemCal, the membrane gas recovery system in this study could be established and evaluated in Aspen HYSYS.…”

Section: Theorymentioning

confidence: 99%

“…The liquid hydrocarbons were directly recovered, and the separated gases were fed to a vapor membrane 301 and 302. The membrane material of a vapor membrane module was chosen as PDMS, and the properties and permeance of which could be found in ref 21. After being enriched in permeation of vapor membrane modules, the hydrocarbons were recompressed and condensed in a compressor K301 and a condenser E301.…”

Section: Energy and Fuelsmentioning

confidence: 99%

Optimization of Residual Oil Hydrocrackers: Integration of Pump-Free Ebullated Bed Process with Membrane-Aided Gas Recovery System

Chen

Meng

et al. 2019

Energy Fuels

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The ebullated bed residual oil hydrocracking is a well-established technology wherein the vacuum residue (VR) of crude oil is converted into light valuable oils. This research work targeted to optimize the hydrocracking process by integrating the pump-free ebullated bed reactor (PF-EBR) with a membrane-based gas synthetic recovery system. A PF-EBR hydrocracking unit with a feed capacity of 3 × 10 6 t/a (ton per annum) of vacuum residues was modeled by the axial dispersion model; the 5-lump axial dispersion model and the finite difference model for PF-EBR and membrane unit were developed and packaged as self-defined extensions in Aspen HYSYS, allowing the integrated process to be evaluated in high efficiency and accuracy; the proposed model was further validated by the experimental data of the pilot and 5 × 10 4 t/a industrial unit. The results of process optimizations showed that the membrane-aided separation system demonstrated better performance than the conventional condensation system in separating hydrogen and hydrocarbons from bulk refinery gas. The recovery of hydrogen from the reactor effluent resulted in 30.0% drop in reactor fresh makeup hydrogen cost; the membrane-based system separated the light hydrocarbons from refinery flash gases, which boosted the net profit of hydrocarbon recovery by 80%, leading to $122.3 × 10 6 /a increase in the total product sale (about 7% of the hydrocracker total sale). This study bridged the gap between theoretical models and industrial PF-EBR processes and provided a designing framework for the integrate process of PF-EBR VR hydrocracking and gas synthetic recovery system. The described improvements implied significant reductions in energy cost, carbon footprint, and operational cost; the estimated reduction in CO 2 emissions is around 2.6 × 10 4 t/a; all are attributed to the thorough gas recovery.

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“…The upwind finite difference method was applied to solve Equation (9). The validation of the models was investigated and discussed in previous works [23][24][25][26][27].…”

Section: Modeling Of Membrane Gas Separationmentioning

confidence: 99%

Conceptual Design of Pyrolytic Oil Upgrading Process Enhanced by Membrane-Integrated Hydrogen Production System

et al. 2019

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Hydrotreatment is an efficient method for pyrolytic oil upgrading; however, the trade-off between the operational cost on hydrogen consumption and process profit remains the major challenge for the process designs. In this study, an integrated process of steam methane reforming and pyrolytic oil hydrotreating with gas separation system was proposed conceptually. The integrated process utilized steam methane reformer to produce raw syngas without further water–gas-shifting; with the aid of a membrane unit, the hydrogen concentration in the syngas was adjusted, which substituted the water–gas-shift reactor and improved the performance of hydrotreater on both conversion and hydrogen consumption. A simulation framework for unit operations was developed for process designs through which the dissipated flow in the packed-bed reactor, along with membrane gas separation unit were modeled and calculated in the commercial process simulator. The evaluation results showed that, the proposed process could achieve 63.7% conversion with 2.0 wt% hydrogen consumption; the evaluations of economics showed that the proposed process could achieve 70% higher net profit compared to the conventional plant, indicating the potentials of the integrated pyrolytic oil upgrading process.

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Synergy of CO 2 removal and light hydrocarbon recovery from oil-field associated gas by dual-membrane process

Cited by 21 publications

References 46 publications

Efficiency Separation Process of H2/CO2/CH4 Mixtures by a Hollow Fiber Dual Membrane Separator

Efficiency Separation Process of H2/CO2/CH4 Mixtures by a Hollow Fiber Dual Membrane Separator

Optimization of Residual Oil Hydrocrackers: Integration of Pump-Free Ebullated Bed Process with Membrane-Aided Gas Recovery System

Conceptual Design of Pyrolytic Oil Upgrading Process Enhanced by Membrane-Integrated Hydrogen Production System

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