Mixed Ni-Al oxide catalytic precursors with different elemental ratios (20, 50, and 80 wt.% Ni0) were synthesized using green supercritical antisolvent co-precipitation (SAS). The obtained metal catalysts characterized in detail by X-ray diffraction (XRD) analysis, atomic pair distribution function (PDF) CO adsorption, high-resolution transmission electron microscopy (HRTEM). It was found that ...

In CO2 methanation, spinel phases are often considered as undesirable leading to deactivation. However, they can also be well-dispersed solid solutions suitable catalyst precursors the formation of highly active and finely dispersed sites. Though, spinels such NiAl2O4, which form when Ni/Al2O3 supported catalysts used, require high reduction temperatures become active. To obtain a precursor, re...

A series of MAl2O4 (M=Ni, Zn, and Cu) aluminates were prepared by using impregnation method; the metal content of the products was ranged between 5wt% to 25wt%. The samples were characterized by x-ray diffraction (XRD), Brunauer Emmett Teller (BET) surface area, NH3 temperature-programmed desorption (NH3-TPD), and inductively coupled argon plasma (ICP). The specific surface areas of zinc, ni...

The feasibility of stabilizing nickel-laden sludge from commonly available Al-rich ceramic precursors was investigated and accomplished with high nickel incorporation efficiency. To simulate the process, nickel oxide was mixed alternatively with gamma-alumina, corundum, kaolinite, and mullite and was sintered from 800 to 1480 degrees C. The nickel aluminate spinel (NiAl2O4) was confirmed as the...

Four Ni-Al intermetallic compounds with the Al concentrations in range of 28 to 35 (in atomic percentage) have been fabricated by laser metal deposition (LMD) through mixing appropriate contents pure Ni powder pre-alloyed high-Al nickel aluminide powder. Ni-35Al and Ni-32Al are both composed more than 45 vol.% β-NiAl matrix phase dispersing γ′-Ni3Al, while Ni-30Al Ni-28Al consisted worm-like, n...

Biodiesel’s contribution as a renewable energy carrier is increasing continuously. Fuel cell market penetration, although slow, is now an irreversible reality. The combination of solid oxide fuel cells (SOFC) with biodiesel offers considerable advantages because it entails both high energy conversion efficiency and nearzero atmospheric carbon emissions. This work is aimed at proving the efficie...