The effect of regenerated MEG on hydrate inhibition performance over multiple regeneration cycles

Alef, Khalid; Smith, Callum; Iglauer, Stefan; Gubner, Rolf; Barifcani, Ahmed

doi:10.1016/j.fuel.2018.02.190

Cited by 27 publications

(19 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Studies from literature that investigated degradation of MEG have found the by-products of MEG degradation to be formic, glycolic, acetic and oxalic [[9], [10], [11], [12], [13], [14]]. Numerous studies have been conducted by our laboratory using our method which are outlined in Table 1 [2,15,16]. The results clearly show the presence of degradation products such as acetic acid between degraded and non-degraded samples.…”

Section: Methods Detailsmentioning

confidence: 88%

“…However, during the recoverability process MEG undergoes multiple phases of thermal exposure. This usually leads to thermal degradation in the MEG solution which results in an overall lower hydrate inhibitory performance [2].…”

Section: Methods Detailsmentioning

confidence: 99%

“…In-order to understand how degradation occurs, its products, the impact on the equipment, and the hydrate inhibition performance of MEG, a method to degrade and test MEG is proposed in-detail. A study conducted by the authors that successfully utilized this method reported on the effect of regenerated MEG over multiple cycles [2]. The method essentially comprises of three stages; a) Degradation of MEG, b) Analysis of degraded MEG, and c) Hydrate testing of degraded MEG.…”

Section: Methods Detailsmentioning

confidence: 99%

“…Both, the water and MEG will evaporate while leaving behind salts and other chemicals that can then be removed from the system [7]. Care needs to be taken to ensure temperatures do not rise beyond the thermal degradation temperature of MEG, even though degradation of MEG has been shown to be possible at reclaimer operating conditions which are considerably lower [2,8].…”

Section: Methods Detailsmentioning

confidence: 99%

See 3 more Smart Citations

Degradation and hydrate phase equilibria measurement methods of monoethylene glycol

2019

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Methods Detailsmentioning

confidence: 88%

Section: Methods Detailsmentioning

confidence: 99%

Section: Methods Detailsmentioning

confidence: 99%

Section: Methods Detailsmentioning

confidence: 99%

See 2 more Smart Citations

Degradation and hydrate phase equilibria measurement methods of monoethylene glycol

2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…The MP is used to supply energy for the distillation column (preheater and reboiler), while R‐12 is used as a cooling utility in the condensers. The use of refrigerant is necessary to maintain vacuum pressure in the distillation column 40 …”

Section: Economic Evaluationmentioning

confidence: 99%

Design, optimization and economic analysis of a monoethylene glycol recovery process: salt precipitation and vacuum operation

et al. 2020

View full text Add to dashboard Cite

In the present study, the energy requirements, performance and economic feasibility of monoethylene glycol (MEG) recovery process (MEG-R-P) were establish based on Aspen Plus simulation. The simulation was carried out in two designs and four scenarios related to the composition (mono and divalent salts) of rich-MEG. The results revealed that, under optimized conditions, a process consists of a vacuum flash separator and distillation column operated at 0.05 bar recovered 99.7% of MEG with a purity of 99.9 wt% MEG for all scenarios. The concentration and type of dissolved solids showed a minimal effect on the process of energy and performance due to high dilution. The net present worth (20 years, 8%) of the capital and operating costs associated with MEG-R-P were 11.5 and 11.7 MMUSD, respectively, representing two to four folds saving compared with published results. The recovered MEG can be recycled 10 times with an estimated saving of 50% of the total MEG purchasing cost for one-time recycling, and up to 80% saving for five times recycling. Obtained results confirm the high economic and environmental benefits achieved by applying the proposed MEG-R-P. K E Y W O R D S economic evaluation, monoethylene glycol (MEG), process simulation 1 | INTRODUCTION Gas hydrates (GH) are ice-like clathrates of crystalline structure formed due to the freezing of water in the gas stream leading to pipeline plugging and discontinuing the transportation of gas. The formation of GHs has significant safety risks and economic challenges to gas transportation and processing that end up with operational shutdown for an extended period. Thus, careful measures to avoid, mitigate and control the formation of these hydrates are required for offshore production sites.

show abstract

Low‐voltage and ion‐free‐reverse‐migration electrically regenerated mixed‐bed ion exchange for MEG desalination

Zhang

Yang

et al. 2020

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

An improved electrical regeneration method of ion exchange was proposed to enhance the feasibility of applying ion exchange for mono-ethylene glycol (MEG) desalination and simplify the existing MEG regeneration process in deepwater gas fields. Compared with the latest electrical regeneration process named membrane-free electrodeionization (MFEDI), this method required lower voltage, did not consume high purity water, and eliminated ion backward migration in principle. These improvements were achieved by changing the electric field direction and the flow direction from parallel in MFEDI to perpendicular during ion exchange regeneration step. In this work, a pair of commercial ruthenium oxide-coated titanium electrodes was installed on both sides of the cuboid experimental setup. The mixed resins consisting of strong-base and weak-acid resins were filled between the electrodes. In water flow and direct current electric field, the resins were regenerated successfully. The feasibility of efficient regeneration with high conductivity feed water (3-200 μS/cm) was verified. After regeneration of the resin bed for 1 h at a voltage lower than 73 V, 33.83% of NaCl in 5.16 bed volume (BV) simulated rich MEG liquid was removed. After 15 cycles of repeated operation, the performance of the resins remained stable. These results provide the possibility to reclaim MEG in deepwater gas fields through a simpler method.

show abstract

The effect of regenerated MEG on hydrate inhibition performance over multiple regeneration cycles

Cited by 27 publications

References 30 publications

Degradation and hydrate phase equilibria measurement methods of monoethylene glycol

Degradation and hydrate phase equilibria measurement methods of monoethylene glycol

Design, optimization and economic analysis of a monoethylene glycol recovery process: salt precipitation and vacuum operation

Low‐voltage and ion‐free‐reverse‐migration electrically regenerated mixed‐bed ion exchange for MEG desalination

Contact Info

Product

Resources

About