Hydrodesulfurization of Dibenzothiophene over Ni-Mo-W Sulfide Catalysts Supported on Sol-Gel AlO-CeO.

To achieve sulfur content in gas oil at a near-zero level, new catalysts with improved hydrogenation functions are needed. In this work, new Ni-Mo-Mo hydrodesulfurization (HDS) catalysts supported by AlO-CeO materials were synthesized to evaluate their efficiency in the reaction of HDS with dibenzothiophene (DBT). AlO-CeO supports different CeO loadings (0, 5, 10 and 15 wt.

Method for analyzing HR-TEM micrographs to propose and/or describe structures and their interaction in crystalline materials.

A general and versatile method for the analysis and processing of HR-TEM data useful for several applications is presented. The first utility is to identify the structures seen in the micrographs; also can be extended to propose the interaction of structure dynamics between various phases; and also it can be hybridized with the chemical method to make a proposal of new structure and/or phase. The general method consisted of four steps: 1) micrograph pretreatment, 2) measurement of planar distances, 3) structure identification, and 4) structure corroboration.

Efficient Removal of Hg(II) from Water under Mildly Acidic Conditions with Hierarchical SiO Monoliths Functionalized with -SH Groups.

In this work, novel adsorbents based on 3D hierarchical silica monoliths functionalized with thiol groups were used for the removal of Hg(II) ions from an acidic aqueous solution (pH 3.5). Silica monoliths were synthesized by using two different pluronic triblock polymers (P123 and F127) to study the effect of porous structure on their sorption capacity.

Catalysts for the Conversion of CO to Low Molecular Weight Olefins-A Review.

There is a large worldwide demand for light olefins (C-C), which are needed for the production of high value-added chemicals and plastics. Light olefins can be produced by petroleum processing, direct/indirect conversion of synthesis gas (CO + H) and hydrogenation of CO. Among these methods, catalytic hydrogenation of CO is the most recently studied because it could contribute to alleviating CO emissions into the atmosphere.