Production of Highly Dispersed Ni within Nickel Silicate Materials with the MFI Structure for the Selective Hydrogenation of Olefins

Abstract

Aluminum-free Ni-incorporated MFI zeolite materials were synthesized in a batch reactor under mild reaction conditions using the hydrothermal method and were proven to exhibit highly active sites for the saturation of aromatics and olefinic molecules due to the high dispersion of the Ni species. The synthesized solid materials were characterized by various methods, and computational modeling aided in understanding the Ni dispersion in the MFI framework. The novelty of this study is corroborated to the unprecedented hydrogenation activity of the Ni-MFI materials when tested with a 1-octene model molecule at 0.48 MPa H2 pressure and moderate temperatures (423–473 K). Another important aspect of this work is the significant elimination of olefinic molecules from a sulfur-rich industrial cracked naphtha feedstock when using extrudates of the same material, which enforces that Ni-MFI could be commercially applied in industry for the selective hydrogenation of olefins present in light petroleum streams.

One-pot prepared mesoporous silica SBA-15-like monoliths with embedded Ni particles as selective and stable catalysts for methane dry reforming

“…In the case of Ni II 5%@S, a major contribution was observed at approximately 857 eV with a very small one at 853.8 eV as reported in the work of K.O. Sebakhy et al [37] dealing with highly dispersed Ni within silicate zeolites. In some studies, it is mentioned that this could be also the result of the presence of Ni(III), but this is not compatible in our case with the quantification of nickel by TPR-H2 shown before.…”

Size Effects of NiO Nanoparticles on the Competitive Adsorption of Quinolin-65 and Violanthrone-79: Implications for Oil Upgrading and Recovery

“…The instrument and protocol employed in the characterization of the NiO samples using XPS were similar to those described elsewhere. 56 2.3.2. Fourier Transform Infrared Spectroscopy (FTIR).…”

“…The instrument and protocol employed for the characterization of the NiO samples using FTIR were similar to those described in previous studies. 13,56 2.3.3. Textural Properties.…”

“…The instrument and protocol employed for the characterization of the NiO samples using XRD were similar to those described in a previous study. , The main difference was the use of a Rigaku zero background sample holder model 906163 for carrying out the experiments. The crystalline domain sizes were assessed using the Scherrer equation, as found in the commercial software JADE …”

A Review on the Effects of Organic Structure-Directing Agents on the Hydrothermal Synthesis and Physicochemical Properties of Zeolites

“…Although this synthetic protocol is not in the scope of our review, it is a very useful technique that can diminish the negative impacts of industrial wastes on the environment [51][52][53]. In addition, the incorporation of heteroatoms in a metal-zeolite framework (e.g., Ni-MFI topology) rather than conventional Al-containing zeolites needs the synthesis technique, which is modified by altering pH and the type of precursors as the interaction of heteroatoms with organic SDA can differ from Al and Si [54]. The aim of this review is to provide a survey about the role and effects of SDAs in the synthesis of zeolites, as well as the recent advances in the field of the synthesis of novel SDAs.…”