Temperature Dependent Adsorption of Sulfur Components, Water, and Carbon Dioxide on a Silica–Alumina Gel Used in Natural Gas Processing

Chowanietz, V.; Pasel, Christoph; Luckas, Michael; Bathen, Dieter

doi:10.1021/acs.jced.6b00301

Cited by 20 publications

(20 citation statements)

References 18 publications

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“…In Figure , H 2 O adsorption on zeolite 3A is compared to that of two literature sources at T = 40 °C. , Figure shows two adsorption studies at T ≈ 100 °C in addition this work on zeolite 4A. , There were significantly more measurements for H 2 O adsorption on silica gel at the comparable temperatures between T = 25 and 50 °C (Figure ). ,− Note that variance between some adsorbents is expected due to different material preparation, i.e., some zeolite materials may have binder and literature silica gel materials are 22 Å and/or have some alumina versus our pure 60 Å silica gel material.…”

Section: Resultsmentioning

confidence: 99%

Sour Gas and Water Adsorption on Common High-Pressure Desiccant Materials: Zeolite 3A, Zeolite 4A, and Silica Gel

2019

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When raw sour gas is gathered for transportation over long distances, adsorptive dehydration is often employed to avoid condensable water prior to purification at a gas processing plant, i.e., adsorptive dehydration is used to avoid excessive corrosion or hydrate plugging within transportation/gathering lines. To optimize and design adsorptive conditioning facilities, simulation requires self-consistent experimental adsorption measurements at pressures relevant to gathering and transportation. To this end, manometric adsorption measurements on methane, carbon dioxide, carbonyl sulfide, and hydrogen sulfide on silica gel were measured at high pressures. This data adds to our previous work with sour gas adsorption on zeolites 4A and 13X. Also, in this study, gravimetric measurements for water adsorption are reported for silica gel, zeolite 3A, and zeolite 4A. Absolute and excess adsorption isotherms were determined for the adsorptives studied with operating temperatures ranging from T = 0 to 50 °C and T = 25 to 150 °C for the manometric and gravimetric measurements, respectively. Across all of the desiccant materials studied, H 2 O has the largest adsorption affinity, followed by the acid gases (H 2 S and CO 2 ), COS, and finally CH 4 . In terms of H 2 O adsorption, zeolites 3A and 4A show similar affinity (low-pressure Henry's law slope), whereas zeolite 4A shows a slightly larger capacity. Both zeolites 3A and 4A exceed silica gel in terms of capacity and affinity.

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Section: Resultsmentioning

confidence: 99%

Sour Gas and Water Adsorption on Common High-Pressure Desiccant Materials: Zeolite 3A, Zeolite 4A, and Silica Gel

2019

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“…Here, the sodium cation induces an instantaneous dipole in the nonpolar molecule leading to mutual attraction. Interactions of type cation-induced dipole are in general energetically more valuable than dispersion interactions. , Zeolite 13X presents a chemically heterogeneous surface to the adsorptives due to sodium cations incorporated in a silica–alumina lattice. However, because of its crystallinity zeolite 13X exhibits a periodical pattern which may offer many adsorption sites of similar energetic value. , …”

Section: Methodsmentioning

confidence: 99%

Trace Adsorption of Ethane, Propane, and n-Butane on Microporous Activated Carbon and Zeolite 13X at Low Temperatures

et al. 2017

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Removing of trace-leveled light hydrocarbons from exhaust air or gas streams becomes an increasingly important issue in the field of process and environmental technology, e.g., storage and transport of liquefied natural gas. Adsorption processes at temperatures below 0 °C have great potential to meet process specifications or environmental regulatory limits. Designing of such adsorption processes requires a profound insight into the thermodynamics of adsorption at low temperatures, which is not available yet. Therefore, this work provides adsorption isotherms of ethane, propane, and n-butane on microporous activated carbon and zeolite 13X in a temperature range from −40 to +60 °C and at partial pressures from 5 to 1000 Pa. The influence of temperature on the adsorbed amount on activated carbon and zeolite 13X is discussed for each adsorptive considering isosteric heats of adsorption and specific interactions between the adsorptive and the adsorbent surface.

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“…The aluminum is present in different configurations inside the siloxane network. In literature, a tetrahedral and an octahedral coordination are described , .…”

Section: Methodsmentioning

confidence: 99%

“…, which implies adsorption sites of different energetic value. The isotherm parameters n and k f were found by linear regression , . The results are shown in Tab.…”

Section: Methodsmentioning

confidence: 99%

Adsorption of Cyclic Hydrocarbons on Silica Alumina Gels in Natural Gas Processing

Berg

Pasel

Luckas

et al. 2017

Chemie Ingenieur Technik

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To ensure the technical use of natural gas it is necessary to remove heavy (cyclic) hydrocarbons from the crude gas. In this article the adsorption of two cyclic hydrocarbons in a N 2 -carrier gas is investigated on two commercial silica alumina gels. Adsorption isotherms are determined from cumulative breakthrough experiments in a fixed-bed adsorber. The isosteric heat of adsorption is calculated from the temperature-dependent isotherms. The experimental data is discussed regarding the molecular structure of the adsorptive agents as well as surface chemistry and pore structure of the adsorbents.

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Temperature Dependent Adsorption of Sulfur Components, Water, and Carbon Dioxide on a Silica–Alumina Gel Used in Natural Gas Processing

Cited by 20 publications

References 18 publications

Sour Gas and Water Adsorption on Common High-Pressure Desiccant Materials: Zeolite 3A, Zeolite 4A, and Silica Gel

Sour Gas and Water Adsorption on Common High-Pressure Desiccant Materials: Zeolite 3A, Zeolite 4A, and Silica Gel

Trace Adsorption of Ethane, Propane, and n-Butane on Microporous Activated Carbon and Zeolite 13X at Low Temperatures

Adsorption of Cyclic Hydrocarbons on Silica Alumina Gels in Natural Gas Processing

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