SBA-15 Mesoporous Silica as Catalytic Support for Hydrodesulfurization Catalysts—Review

Huirache–Acuña, R.; Nava, R.; Peza-Ledesma, C.; Lara‐Romero, Javier; Alonso-Núez, Gabriel; Pawelec, B.; Rivera-Muñoz, Eric M.

doi:10.3390/ma6094139

Cited by 185 publications

(80 citation statements)

References 97 publications

(447 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Commonly, the deposited washcoat consists of a high surface area carrier, generally ceramic, where the metal active phase is properly dispersed. A variety of materials have been investigated as high surface area ceramic supports, such as alumina, silica, titania, and ceria [3][4][5][6]. In some process applications, low surface area catalysts have been investigated instead of high surface area ones.…”

Section: Introductionmentioning

confidence: 99%

Washcoat Deposition of Ni- and Co-ZrO2 Low Surface Area Powders onto Ceramic Open-Cell Foams: Influence of Slurry Formulation and Rheology

et al. 2015

View full text Add to dashboard Cite

Abstract:The effect of formulations and procedures to deposit thin active layers based on low surface area powders on complex geometry substrates (open-cell foams) was experimentally assessed. An acid-free liquid medium based on water, glycerol, and polyvinyl alcohol was used for powder dispersion, while a dip-coating technique was chosen for washcoat deposition on 30 PPI ceramic open-cell foams. The rheological behavior was explained on the bases of both porosity and actual powder density. It was proved that the use of multiple dippings fulfills flexibility requirements for washcoat load management. Multiple depositions with intermediate flash drying steps at 350 °C were carried out. Washcoat loads in the 2.5 to 22 wt. % range were obtained. Pore clogging was seldom observed in a limited extent in samples with high loading (>20 wt. %). Adhesion, evaluated by means of accelerated stress test in ultrasound bath, pointed out good results of all the deposited layers.

show abstract

Section: Introductionmentioning

confidence: 99%

Washcoat Deposition of Ni- and Co-ZrO2 Low Surface Area Powders onto Ceramic Open-Cell Foams: Influence of Slurry Formulation and Rheology

et al. 2015

View full text Add to dashboard Cite

show abstract

“…In this group of materials the SBA-15 silicas with hexagonal symmetry having wider mesopores receive much attention because of the possibility of application in the processes which are controlled by diffusion in pore system of a solid (Zhao et al 1998). The SBA-15 materials with well organized structure are very useful as adsorbents (Gibson 2014a, b), catalyst supports (Huirache-Acuña et al 2013), supports of active substances (Vallet-Regi et al 2007;Wang 2009) or sensors (Melde et al 2008). Moreover, the surface properties of these types of materials can be easily modified, e.g.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the SBA-15 materials ability to accumulation of 4-chlorophenol on carbon paste electrode

et al. 2016

View full text Add to dashboard Cite

The adsorption of 4-chlorophenol (4-CP) from an aqueous solution on three ordered mesoporous silica materials (commercial unmodified SBA-15-Sigma, synthesized unmodified SBA-15 and amino-functionalized SBA-15-NH 2 ) was studied. The adsorption isotherms were analyzed using the Generalized Langmuir equation taking into account the energetic heterogeneity. The adsorption capacities of the mesoporous silicas increased in order: SBA-15 \ SBA-15-Sigma \ SBA-15-NH 2 . The materials were used for the modification of the carbon paste electrodes (CPEs) for detection of 4-CP based on differential pulse voltammetry. Different parameters that affects the DPV signal such as scan rate, accumulation time and paste composition were investigated. Compared with the bare (graphite) CPE, the SBA-15 modified electrodes greatly increased the oxidation peak current of 4-CP, showing strong signal enhancement effects. The SBA-15-NH 2 modified CPE showed a larger peak current and higher sensitivity for the 4-CP in comparison with the SBA-15 and SBA-15-Sigma modified carbon paste electrodes. The results showed high usefulness of the ordered mesoporous silica materials as an electrode modifiers in the electroanalytical techniques.

show abstract

“…Meso-porous materials have a pore network that can be disarranged or arranged; the latter is called an ordered mesoporous material whose main characteristic is to have a surface area between the ranges of 300 and 1200 m 2 [9]. According to the absorption capacity and chemical properties of MS, these materials could be used as new adsorption systems at different industrial applications, such as adsorption of pollutants [10,11], catalyst supports [12], and sustained drug release systems [13][14][15][16].…”

Section: Mesoporous Silica As Drug Deliverymentioning

confidence: 99%

Silica from Rice as New Drug Delivery Systems

Salazar-Hernández¹,

Salazar-Hernández²,

Rocío³

et al. 2017

Rice - Technology and Production

View full text Add to dashboard Cite

The pharmaceutical industry has seen an increased need of carriers or excipients design that allows the controlled release of a drug in the human body. The main role of an excipient is to carry the drug for its administration under therapeutic index. Among the new generation of excipients, the ordered mesoporous silica (MS) presents several advantages, such as excellent biocompatibility, good adsorption capacity, and precise control in the drug delivery. However, the high cost of synthesis of mesoporous silica restricts its use to industrial applications; therefore, a low-cost procedure is necessary for widespread use. Biogenic silica from rice husk (SiO 2 -rice) could be a new choice as a drug delivery system. This silica is obtained from an acid leaching of rice husk followed by calcinations processes at low temperatures; these conditions produce silica with good adsorption properties, similar to those of MS. In consequence, the excipient behavior of SiO 2 -rice was assessed using folic acid as the model drug, displaying an 18.5% of absorption in the SiO 2 -rice pores, while MS absorbed around 19%. The drug release profiles were similar for both the silicas, suggesting that SiO 2 -rice could be a low-cost, similar yield excipient for drugs similar to folic acid.

show abstract

SBA-15 Mesoporous Silica as Catalytic Support for Hydrodesulfurization Catalysts—Review

Cited by 185 publications

References 97 publications

Washcoat Deposition of Ni- and Co-ZrO2 Low Surface Area Powders onto Ceramic Open-Cell Foams: Influence of Slurry Formulation and Rheology

Washcoat Deposition of Ni- and Co-ZrO2 Low Surface Area Powders onto Ceramic Open-Cell Foams: Influence of Slurry Formulation and Rheology

Evaluation of the SBA-15 materials ability to accumulation of 4-chlorophenol on carbon paste electrode

Silica from Rice as New Drug Delivery Systems

Contact Info

Product

Resources

About