High pressure hydrogen sulphide adsorption on silica–aluminas

Tagliabue, Marco; Bellussi, Giuseppe; Broccia, Patrizia; Carati, Angela; Millini, Roberto; Pollesel, Paolo; Rizzo, Caterina

doi:10.1016/j.cej.2012.08.076

Cited by 20 publications

(4 citation statements)

References 28 publications

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“…We suppose that such changes of ΔN D and ΔN S are possibly related to electron affinity and dipole moment of the adsorbed molecules. Figure 6 b shows the electron affinity and dipole moment of the three gases [ 44 , 45 , 46 , 47 , 48 , 49 ]. It has been reported that an analyte with higher electron affinity has stronger binding to the electrons, which works as deep traps [ 50 ], and the polar molecules adsorbed in the channel can form bound states with carriers that are temporarily localized on shallow traps [ 51 ].…”

Section: Resultsmentioning

confidence: 99%

A Single Nanobelt Transistor for Gas Identification: Using a Gas-Dielectric Strategy

Cai

Song

Tong

et al. 2016

Sensors

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Despite tremendous potential and urgent demand in high-response low-cost gas identification, the development of gas identification based on a metal oxide semiconductor nanowire/nanobelt remains limited by fabrication complexity and redundant signals. Researchers have shown a multisensor-array strategy with “one key to one lock” configuration. Here, we describe a new strategy to create high-response room-temperature gas identification by employing gas as dielectric. This enables gas discrimination down to the part per billion (ppb) level only based on one pristine single nanobelt transistor, with the excellent average Mahalanobis distance (MD) as high as 35 at the linear discriminant analysis (LDA) space. The single device realizes the selective recognition function of electronic nose. The effect of the gas dielectric on the response of the multiple field-effect parameters is discussed by the comparative investigation of gas and solid-dielectric devices and the studies on trap density changes in the conductive channel. The current work opens up exciting opportunities for room-temperature gas recognition based on the pristine single device.

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Section: Resultsmentioning

confidence: 99%

A Single Nanobelt Transistor for Gas Identification: Using a Gas-Dielectric Strategy

Cai

Song

Tong

et al. 2016

Sensors

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“…Many studies have investigated the ability of various silica particles and their modification to adsorb H 2 S. Tagliabue et al [69] compared the H 2 S sorption ability of microporous and (micro) mesoporous silica and silica alumina. Other adsorbents for H 2 S removal were prepared by synthesizing and modifying the mesoporous molecular silica of SBA-15 with methyl diethyl amine [70], mesoporous silica molecular sieve (MSU-1) supported ZnO or CuO [71], amine modified silica xerogel [72], and mesoporous silica supported Mn 2 O 3 [73].…”

Section: Development Of Mmms Containing Silica For Acid Gas Removalmentioning

confidence: 99%

Silica applied as mixed matrix membrane inorganic filler for gas separation: a review

Setiawan

Chiang

2019

Sustain Environ Res

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The trade-off relationship between gas permeability and selectivity is well-known as the primary barrier to developing polymeric membranes for the gas separation process. Mixed matrix membranes (MMMs) can be promoted as a solution to produce the desired membrane for gas separation processes. The general idea for synthesizing MMMs is to induce the thermal, electrical, mechanical, and molecular sieve properties of these nano materials into the base membrane. The incorporation of silica particles with molecular sieving properties in the polymer matrix is expected to lead to higher permeability and/or higher selectivity, compared to polymeric membranes. This paper reviews various types of silica incorporated into a polymer matrix and their gas transport mechanisms, MMM preparation methods and effect of silica on MMM characteristics and gas separation performance. MMM gas transport models after silica incorporation are also reviewed. In addition, the challenges and future works in developing MMMs with silica particles as inorganic filler are discussed.

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“…125 Furthermore, laboratory-scale experimentation has pointed to Eni ERS-8 porous silica-alumina as an adsorbent applicable in PSA processes for the removal of carbon dioxide or hydrogen sulphide from sour NG. [126][127][128] The adsorption isotherms acquired at 30 1C with pure hydrogen sulphide, carbon dioxide and methane on ERS-8 silico-alumina are reported in Fig. 12.…”

Section: Use Of Zeolites In Separation Processesmentioning

confidence: 99%