نتایج جستجو برای: sba 15 عاملدار شده
تعداد نتایج: 935689 فیلتر نتایج به سال:
Mesoporous photocatalysts of CeO2/SBA-15 are prepared by two methods of direct synthesis as solvent-usage and solvent-free methods. In solvent-usage method, CeO2/SBA-15 is synthesized in acidic media. While, in solvent-free method, CeO2/SBA-15, has been prepared through the novel path of directly grind cerium salt into the as-prepared samples of SBA-15 occluded ...
Sorbitol is one of the platform chemicals and can be produced from various renewable sustainable sources via different processes. Hydrothermal liquefaction an effective promising approach to produce sorbitol, since subcritical reaction media appropriate catalysts provide a selective production chemicals. In this study, sorbitol was (cellulose glucose) in presence Ru-based (Ru/SiO2, Ru/AC, Ru/SB...
SBA-CaCl 2 (SCa) composites with high CaCl content were prepared using the non-functionalized and methyl-and carboxyl-functionalized mesoporous SBA-15 supports their thermochemical heat storage (TCHS) performance have been investigated a TG/DSC system coupled humidity generator. This paper presents influence of silica (SBA-15) functionalization on structural-textural properties SCa consequently...
سنتز مزو حفرههای سیلیکایی از سال 1992 تا به حال زمینه پژوهشی و کاربردی بسیار وسیعی را ایجاد کرده است. در مقایسه با سایر مزوحفرههای سیلیکایی SBA-15 دارای دیوارههای ضخیمتری بوده و حجم حفره و مساحت سطح بیشتری دارند. سطح مزوحفرههای سیلیکایی را میتوان با گروههای آلی برای دستیابی به هدفهای خاص بهینه کرد. کاربرد اصلی مزوحفرهها فرایندهای جذبی برای تصفیه پسابهای موجود در محیط زیست است. حذف رن...
A series of nickel-cerium-promoted mesoporous silica (SBA-15) catalysts modified with different loadings yttrium were synthesized by cetyltrimethylammonium bromide (CTAB)-assisted impregnation. The tested in CO2 methanation reaction and characterized N2 sorption, X-ray fluorescence (XRF), small-angle scattering (SAXS) wide-angle diffraction (XRD), H2 chemisorption, transmission electron microsc...
Assessment of adsorption zinc (II) ions from aqueous solution using alginate-SBA-15 sorbent nanocomposite was investigated as a function of zinc concentration, solution pH, and contact time. For that purpose, the alginate-SBA-15 nanocomposite adsorbent was prepared through encapsulation method by immobilization mesoporous SBA-15 into a polymeric matrix. Identification of functional groups and s...
A carrier system based on nanoporous silica (SBA-15) with magnetic nanoparticles of CoFe2O4 was synthesized via the impregnation of cobalt salt, iron salt and citric acid with as-synthesized SBA-15. The obtained samples were characterized by small angle X-ray scattering (SAXS), N2 adsorption/desorption, scanning electron microscopy (SEM), vibrating sample magnetometer (VSM) and ultraviolet (UV)...
On the Support Effect and the Cr Promotion of Co Based Catalysts for the Acetic Acid Steam Reforming
This work focuses on the support effect of performances Co based catalysts for acetic acid steam reforming. SBA-15, a well ordered hexagonal mesoporous silica structure, and CeO2 have been selected as supports, with impact chromium addition also being investigated. Better reforming recorded compared to SBA-15 supported and, in particular, 7Co/CeO2 catalyst showed highest values conversions enha...
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