Adsorption, Co-adsorption, and Reactions of Sulfur Compounds, Aromatics, Olefins over Ce-Exchanged Y Zeolite

Duan, Linhai; Gao, Xionghou; Meng, Xiuxia; Zhang, Haitao; Wang, Qiang; Qin, Yucai; Zhang, Xiaotong; Song, Lijuan

doi:10.1021/jp303040m

Cited by 69 publications

(47 citation statements)

References 41 publications

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“…Several models assumed that the sulfur density is constant and does not change with the reservoir conditions; relating the sulfur density to the reservoir temperature will greatly assist in understanding the mechanism and the phase at which the elemental sulfur will deposit. Fanelli (1950) reported surface-tension measurements for highly purified sulfur. Fanelli found that surface tension decreases linearly with temperature, and there is a distinct discontinuity at approximately 160 C. At temperatures greater than 160 C, the decrease is more gradual.…”

Section: Elemental-sulfur Physical Propertiesmentioning

confidence: 99%

“…All the analytical models neglected the adsorption of liquid sulfur by the formation rocks; the adsorption part will be significant if the formation contains some clay because the clay minerals help in the adsorption process. Many authors have mentioned the sulfur adsorption onto different chemical processes (Boulinguiez and Le Cloirec 2010;Duan et al 2012). The sulfur-adsorption term will affect the value of sulfur saturation in the reservoir.…”

Section: Sulfur-adsorption Effectmentioning

confidence: 99%

“…The quantity K is constant at a given flow rate and varies with v, according to the following empirical relation (Duan et al 2012):…”

Section: Sulfur-adsorption Effectmentioning

confidence: 99%

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Effect of Elemental-Sulfur Deposition on the Rock Petrophysical Properties in Sour-Gas Reservoirs

Mahmoud

2013

SPE Journal

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The deposition of elemental sulfur as a solid phase results in plugging the pore space available for gas flow and reduces the reservoir productivity. Elemental sulfur also can be deposited as a liquid phase if the reservoir temperature is greater than 115 C. The liquid sulfur restricts the inflow of gas because of the big density difference between liquid sulfur and gas, which could be 20 times or more. For isothermal conditions in the reservoir, the reduction in reservoir pressure to lower than a critical value causes the elemental sulfur to deposit in the formation, and in turn the gas-well productivity is affected. Accurate prediction of sulfur deposition will help better manage sour-gas reservoirs with potential sulfur-deposition problems.In this paper, a new analytical model was developed to predict the effect of sulfur deposition on the damage of the near-wellbore region. The damage was quantified through the investigation of the effect of sulfur deposition on rock porosity, relative permeability of the gas phase, and the change in rock wettability. The main objective of this model is to investigate the effect of radial distance on formation damage. Different rock-and fluid-property correlations were used in the model. Previous studies did not consider the change in gas properties with pressure, and numerically modeled the sulfur deposition as a condensate in a gas/condensate reservoir. This paper will consider sulfur adsorption, and the actual physical properties of the sulfur will be used in the developed model. The optimum gas-flow velocity that will maximize the sulfur solubility in the gas will be determined. A coreflood experiment was performed to determine the effect of sulfur deposition on the carbonate-rock permeability, porosity, and wettability. The experiment was used to determine the effect of sulfur adsorption on the rock petrophysical properties. The contact angle was measured for a carbonate core saturated with sulfur by use of a pendant-drop tensiometer.Analytical and numerical solutions showed that the deposition of sulfur was affected by the radial distance from the wellbore and sulfur-solubility changes as a function of the pressure drop. Sulfur deposition was found to have a great effect on the rock wettability, and in turn the gas production will be affected. The model can be used to predict the critical flow velocity that the gas can flow without precipitating sulfur. The optimum gas-flow velocity was estimated to be a range that maximizes the sulfur solubility in the gas. It was confirmed experimentally that the sulfur deposition reduced the carbonate-core porosity and permeability, and changed the contact angle (rock wettability). The contact angle increased, which means sulfur adsorption on the rock surfaces changed the rock toward more-gas-wet rock.

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Section: Elemental-sulfur Physical Propertiesmentioning

confidence: 99%

Section: Sulfur-adsorption Effectmentioning

confidence: 99%

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Effect of Elemental-Sulfur Deposition on the Rock Petrophysical Properties in Sour-Gas Reservoirs

Mahmoud

2013

SPE Journal

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“…All the analytical models neglected the adsorption of liquid sulfur by the formation rocks, the adsorption part will be significant if the formation contains some clays because the clay minerals help in the adsorption process. Many authors have mentioned the sulfur adsorption onto different chemical processes (Duan et al 2012 andBoulinnguiez, andLe Cloirec 2010). This adsorption term will affect the value of sulfur saturation calculations especially around the wellbore.…”

Section: Analytical Modelsmentioning

confidence: 99%

New Numerical and Analytical Models to Quantify the Near-Wellbore Damage due to Sulfur Deposition in Sour Gas Reservoirs

Mahmoud

2013

All Days

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The deposition of elemental sulfur as a solid phase will result in plugging the pore space available for gas flow and reduce the reservoir productivity. Elemental sulfur also can be deposited as a liquid phase if the reservoir temperature was greater than 115 o C. The liquid sulfur will not flow at the same velocity as gas and in turn the gas flow will be restricted by the settled sulfur due to the huge difference between the liquid sulfur density and gas (Could be 20 times or more in certain cases). For the isothermal conditions in the reservoir, the reduction in reservoir pressure below a critical value will cause the elemental sulfur to deposit in the formation, and in turn the gas well productivity will be affected. Accurate prediction of sulfur deposition in the reservoir will help in better manage sour gas reservoirs with potential sulfur deposition problems.In this paper new analytical and numerical models were developed to predict the effect of sulfur deposition on the damage of the near-wellbore. The damage will be quantified through the investigation of the effect of sulfur deposition on the skin damage value, relative permeability of the gas phase, and the change in rock wettability due to sulfur deposition especially in the near-wellbore region. The main objective of these models is to investigate the effect of radial distance on formation damage. Different rock and fluid properties accurate correlation were used in this model for better results prediction. Previous studies did not consider the change in gas properties with pressure, and numerically modeled the sulfur deposition as a condensate in a gas condensate reservoir. In this paper will consider r the sulfur adsorption and the actual physical properties of the sulfur will be used in the developed model. The optimum gas flow velocity will be determined based on the sulfur solubility.Analytical and numerical solutions show that the deposition of sulfur was affected by the radial distance from the wellbore and sulfur solubility change as a function of the pressure drop. The numerical and analytical models showed good match in modeling the sulfur deposition in the near-wellbore area. Sulfur deposition was found to have a great effect on the rock wettability, and in turn the gas production will be affected. The model can be used to predict the critical flow velocity that the gas can flow without precipitating sulfur. The optimum gas flow velocity was estimated to be a range that maximizes the sulfur solubility in the gas.

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“…In recent years, the deep desulfurization of fuel has received worldwide attention because of increasingly stringent environmental regulations and environmental protection . At present, oxidative desulfurization (ODS) is considered a sustainable route for moderate operation conditions .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a hypercrosslinked, ionic, mesoporous polymer monolith and its application in deep oxidative desulfurization

Jiang

Sun

Chen

et al. 2018

J of Applied Polymer Sci

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In this study, we used a facile and scalable strategy to produce a hypercrosslinked, ionic, mesoporous polymer monolith (HCIMPM). On the basis of structure-directing polymeric crosslinking, the interconnected nanonetwork was formed through the in situ crosslinking of the homopolymer poly(vinyl imidazole) via a quaternization reaction, and its textural properties could be effectively adjusted by the block copolymer poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide)(PEO 20 PPO 70 PEO 20 ). The maximum specific surface area and pore volume were 212 m 2 /g and 1.08 cm 3 /g, respectively. Furthermore, the synthetic framework could be functionalized via the loading of PW 12 O 32 40 through ion exchange. The obtained HCIMPM with PW 12 O 40 32 (PW-HCIMPM) was applied in the oxidative desulfurization, and approximately 100% sulfur removal could be achieved in the model oil with hydrogen peroxide (30 wt %) as an oxidant. Moreover, the solid catalyst could be recovered readily and recycled at least six times without a significant decrease in the desulfurization efficiency. As for real diesel, we also observed that almost all of the original sulfur compounds could be converted in 120 min.

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Adsorption, Co-adsorption, and Reactions of Sulfur Compounds, Aromatics, Olefins over Ce-Exchanged Y Zeolite

Cited by 69 publications

References 41 publications

Effect of Elemental-Sulfur Deposition on the Rock Petrophysical Properties in Sour-Gas Reservoirs

Effect of Elemental-Sulfur Deposition on the Rock Petrophysical Properties in Sour-Gas Reservoirs

New Numerical and Analytical Models to Quantify the Near-Wellbore Damage due to Sulfur Deposition in Sour Gas Reservoirs

Synthesis of a hypercrosslinked, ionic, mesoporous polymer monolith and its application in deep oxidative desulfurization

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