A study to reduce atmospheric emissions of an existing natural gas dehydration plant using multiple thermodynamic models

Mehdi Torkmahalleh, Z. Assanova, M. Baimaganbetova, A. Zinetullina

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Using Aspen Plus, operating parameters of an existing triethylene glycol natural gas dehydration plant including the solvent circulation rate, stripping gas flow rate, regenerator reboiler duty, solvent temperature, absorber (contactor) pressure, flash unit pressure and regenerator pressure were optimized to reduce BTEX, VOCs and CO 2 emissions. The plant consists of an absorber, a flash tank, a stripper and a regenerator. Two thermodynamic models including PRMHV 2 and PSRK were utilized for this plant. The sensitivity analysis study was conducted using two methods, namely Method A and Method B. Method A considered the effect of an individual parameter on the emissions, while other parameters were set at their base case values. Method B studied the impact of a given parameter, while other parameters were at their optimum values. Using the two methods, BTEX emission reduced more than 40%, while VOCs and CO 2 emissions were decreased more than 60%. However, the moisture content of the dehydrated gas was higher when Method A was applied (249.9 × 10 −6  kg H 2 O/m 3 ) compared to Method B (65.7 × 10 −6  kg H 2 O/m 3 ). Method B was found to be a more precise approach to achieve the optimum plant operation.

Original languageEnglish
Pages (from-to)1613-1624
Number of pages12
JournalInternational Journal of Environmental Science and Technology
Volume16
Issue number3
DOIs
Publication statusPublished - Mar 14 2019

Fingerprint

Natural Gas
natural gas
Regenerators
Dehydration
Thermodynamics
dehydration
thermodynamics
Natural gas
Carbon Monoxide
Volatile organic compounds
Boiler circulation
Reboilers
Glycols
Sensitivity analysis
Flow of gases
Moisture
BTEX
Gases
methodology
Flow rate

Keywords

  • Aspen Plus
  • BTEX
  • CO emission
  • Natural gas dehydration
  • Simulation
  • VOCs

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Agricultural and Biological Sciences(all)

Cite this

A study to reduce atmospheric emissions of an existing natural gas dehydration plant using multiple thermodynamic models. / Torkmahalleh, Mehdi; Assanova, Z.; Baimaganbetova, M.; Zinetullina, A.

In: International Journal of Environmental Science and Technology, Vol. 16, No. 3, 14.03.2019, p. 1613-1624.

Research output: Contribution to journalArticle

@article{0fb5476dd4bd4fafb6f599f7f0828e77,
title = "A study to reduce atmospheric emissions of an existing natural gas dehydration plant using multiple thermodynamic models",
abstract = "Using Aspen Plus, operating parameters of an existing triethylene glycol natural gas dehydration plant including the solvent circulation rate, stripping gas flow rate, regenerator reboiler duty, solvent temperature, absorber (contactor) pressure, flash unit pressure and regenerator pressure were optimized to reduce BTEX, VOCs and CO 2 emissions. The plant consists of an absorber, a flash tank, a stripper and a regenerator. Two thermodynamic models including PRMHV 2 and PSRK were utilized for this plant. The sensitivity analysis study was conducted using two methods, namely Method A and Method B. Method A considered the effect of an individual parameter on the emissions, while other parameters were set at their base case values. Method B studied the impact of a given parameter, while other parameters were at their optimum values. Using the two methods, BTEX emission reduced more than 40{\%}, while VOCs and CO 2 emissions were decreased more than 60{\%}. However, the moisture content of the dehydrated gas was higher when Method A was applied (249.9 × 10 −6  kg H 2 O/m 3 ) compared to Method B (65.7 × 10 −6  kg H 2 O/m 3 ). Method B was found to be a more precise approach to achieve the optimum plant operation.",
keywords = "Aspen Plus, BTEX, CO emission, Natural gas dehydration, Simulation, VOCs",
author = "Mehdi Torkmahalleh and Z. Assanova and M. Baimaganbetova and A. Zinetullina",
year = "2019",
month = "3",
day = "14",
doi = "10.1007/s13762-018-1802-z",
language = "English",
volume = "16",
pages = "1613--1624",
journal = "International Journal of Environmental Science and Technology",
issn = "1735-1472",
publisher = "CEERS",
number = "3",

}

TY - JOUR

T1 - A study to reduce atmospheric emissions of an existing natural gas dehydration plant using multiple thermodynamic models

AU - Torkmahalleh, Mehdi

AU - Assanova, Z.

AU - Baimaganbetova, M.

AU - Zinetullina, A.

PY - 2019/3/14

Y1 - 2019/3/14

N2 - Using Aspen Plus, operating parameters of an existing triethylene glycol natural gas dehydration plant including the solvent circulation rate, stripping gas flow rate, regenerator reboiler duty, solvent temperature, absorber (contactor) pressure, flash unit pressure and regenerator pressure were optimized to reduce BTEX, VOCs and CO 2 emissions. The plant consists of an absorber, a flash tank, a stripper and a regenerator. Two thermodynamic models including PRMHV 2 and PSRK were utilized for this plant. The sensitivity analysis study was conducted using two methods, namely Method A and Method B. Method A considered the effect of an individual parameter on the emissions, while other parameters were set at their base case values. Method B studied the impact of a given parameter, while other parameters were at their optimum values. Using the two methods, BTEX emission reduced more than 40%, while VOCs and CO 2 emissions were decreased more than 60%. However, the moisture content of the dehydrated gas was higher when Method A was applied (249.9 × 10 −6  kg H 2 O/m 3 ) compared to Method B (65.7 × 10 −6  kg H 2 O/m 3 ). Method B was found to be a more precise approach to achieve the optimum plant operation.

AB - Using Aspen Plus, operating parameters of an existing triethylene glycol natural gas dehydration plant including the solvent circulation rate, stripping gas flow rate, regenerator reboiler duty, solvent temperature, absorber (contactor) pressure, flash unit pressure and regenerator pressure were optimized to reduce BTEX, VOCs and CO 2 emissions. The plant consists of an absorber, a flash tank, a stripper and a regenerator. Two thermodynamic models including PRMHV 2 and PSRK were utilized for this plant. The sensitivity analysis study was conducted using two methods, namely Method A and Method B. Method A considered the effect of an individual parameter on the emissions, while other parameters were set at their base case values. Method B studied the impact of a given parameter, while other parameters were at their optimum values. Using the two methods, BTEX emission reduced more than 40%, while VOCs and CO 2 emissions were decreased more than 60%. However, the moisture content of the dehydrated gas was higher when Method A was applied (249.9 × 10 −6  kg H 2 O/m 3 ) compared to Method B (65.7 × 10 −6  kg H 2 O/m 3 ). Method B was found to be a more precise approach to achieve the optimum plant operation.

KW - Aspen Plus

KW - BTEX

KW - CO emission

KW - Natural gas dehydration

KW - Simulation

KW - VOCs

UR - http://www.scopus.com/inward/record.url?scp=85062608588&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85062608588&partnerID=8YFLogxK

U2 - 10.1007/s13762-018-1802-z

DO - 10.1007/s13762-018-1802-z

M3 - Article

VL - 16

SP - 1613

EP - 1624

JO - International Journal of Environmental Science and Technology

JF - International Journal of Environmental Science and Technology

SN - 1735-1472

IS - 3

ER -