An efficient method for removing hydrogen sulfide from natural gas using supersonic Laval nozzle

Cao, Xuewen; Song, Xiaodan; Chu, Qi; Mu, Linsheng; Li, Yuxuan; Bian, Jiang

doi:10.1016/j.psep.2019.07.008

Cited by 31 publications

(5 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared to the traditional separation process, the 3S can provide higher separation performance, lower size, compact design, higher availability and no chemical consumption 3 , 7 , 41 . In addition, the 3S can be employed for sweetening of sour natural gas and correction of water and HC dew point 3 , 7 , 49 . In this study, the passive method was employed to generate the swirl flow which means any external equipment was not used to generate the centrifugal force.…”

Section: Mathematical Modelingmentioning

confidence: 99%

“…The required temperature to liquefy the light hydrocarbons cannot be obtained by the JT processes, whereas, the optimized 3S can provide high ethane and propane recovery due to the very low temperature achieved inside the Laval nozzle 3 , 7 . Therefore, the 3S designed based on the passive swirler not only can be used instead of the JT process for NGL recovery (described in “ Considered NGL recovery unit ” section), but it can also be used for sweetening 49 and dehydration of natural gas 50 .…”

Section: Mathematical Modelingmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of novel passive methods of generation of swirl flow in supersonic separators by the computational fluid dynamics modeling

Shoghl

Naderifar

Farhadi

et al. 2022

Sci Rep

View full text Add to dashboard Cite

In this paper, three passive methods for the generation of swirl flow in the supersonic separator (3S) were investigated, and their structures were optimized by computational fluid dynamics (CFD) modeling. The influence of the structural and operational parameters on the dew point depression, phase envelope diagram, rate of natural gas liquid (NGL) recovery, and separation efficiency have also been evaluated. The collection efficiency was significantly improved for the nozzle equipped with the passive swirler compared with the simple nozzle. The selection of passive swirler type played a crucial role in the natural gas liquefaction and separation. The side injected swirler, and serpentine swirler showed the most significant improvement in separation efficiency than the U-turn swirler. For the side injected swirler at the optimum injection angle, the maximum collection efficiency was about 89% at the pressure loss ratio (PLR) of 0.2. Besides, the simulation results demonstrated that for the serpentine 3S, with the increase in serpentine twist number, the highest improvement on the collection efficiency of the investigated nozzle was obtained. In addition, it was observed that, when the convergent section profile was designed according to the Witoszynski line-type, a larger refrigeration zone was obtained than other considered profiles.

show abstract

Section: Mathematical Modelingmentioning

confidence: 99%

Section: Mathematical Modelingmentioning

confidence: 99%

Investigation of novel passive methods of generation of swirl flow in supersonic separators by the computational fluid dynamics modeling

Shoghl

Naderifar

Farhadi

et al. 2022

Sci Rep

View full text Add to dashboard Cite

show abstract

“…In the present study, the FLUENT software was selected for the numerical simulations. The density-based compressible flow formulation of the Euler equations have proven to be very successful for the analysis of high-speed flows (Campobasso et al 2018;Cao et al 2019b). Because the medium in the throttling device is compressible high-speed fluid, the density-based solver in FLUENT was adopted in this paper.…”

Section: Mathematical Modelmentioning

confidence: 99%

Flow Characteristics of Wet Natural Gas in Different Throttling Devices

Cao¹,

Chu²,

Song³

et al. 2019

Frontiers in Heat and Mass Transfer

Self Cite

View full text Add to dashboard Cite

Wet natural gas widely exists in the natural gas industry, and the selection of throttling devices plays an important role in wet natural gas transportation. In order to study the flow field characteristics of different throttling devices in wet natural gas pipelines, a set of Laval nozzles, orifice plates, and plate valves have been designed. The standard k-ε model was selected for numerical simulation. By changing inlet pressure, inlet temperature or volume fraction of water-liquid, the pressure field and temperature fields of different throttling devices were obtained, and the influence of the presence of a shockwave on the flow fields of the throttling devices was analyzed. Different throttling devices have significantly different operating characteristics. Therefore, appropriate throttling devices should be selected in different conditions in order to control the pressure of wet natural gas transportation and reduce gas hydrate formation. The present simulation results show that under identical conditions, the throat pressure and temperature of the Laval nozzle are the lowest, the throat pressure of the orifice plate is the highest, and the throat temperature of the plate valve is the highest.

show abstract

“…The usage of the supersonic separator was proposed for removing hydrogen sulfide from natural gas 6. The ANSYS Fluent software package was used for numerical modeling.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of the Combined Supersonic Separator and Vortex Tube Performance for Hydrocarbon Gas Drying

2021

View full text Add to dashboard Cite

Experimental investigation of the combined supersonic separator (CSS) characteristics was carried out and the results were compared with those from the vortex tube. The separator is a counter‐flow vortex tube with an energy separation chamber in the shape of a Laval nozzle; it can be used for hydrocarbon gas transportation preparation and power plant fuel gas drying. Numerical modeling was carried out to confirm the flow specifics in the examined separator structure. Although the cooling capability of the CSS is 30–50 % less than that of the vortex tube, its efficiency of moisture removal is twice as large, as is shown by the experimental research. The maximal cooling power corresponds to a cold flow fraction level of 0.39, while the range of optimal values for the moisture separation is 0.4–0.6.

show abstract

An efficient method for removing hydrogen sulfide from natural gas using supersonic Laval nozzle

Cited by 31 publications

References 39 publications

Investigation of novel passive methods of generation of swirl flow in supersonic separators by the computational fluid dynamics modeling

Investigation of novel passive methods of generation of swirl flow in supersonic separators by the computational fluid dynamics modeling

Flow Characteristics of Wet Natural Gas in Different Throttling Devices

Comparative Study of the Combined Supersonic Separator and Vortex Tube Performance for Hydrocarbon Gas Drying

Contact Info

Product

Resources

About