Preparation, Characterization and Optimization of High Surface Area Ce-La-Cu Ternary Oxide Nanoparticles

Abstract

In this article, CeO2-La2O3-CuO ternary oxide nanoparticles were synthesized using co-precipitation method. Taguchi experimental design was used for producing high surface area ternary oxides. The effect of precipitating agent and its concentration, percentage of lanthanum and copper, calcination temperature, and calcination time, on the surface area of nanoparticles, were studied. The synthesized nanoparticles were characterized by SEM, BET surface area, XRD, EDX, N2 adsorption isotherm, and BJH pore size distributions. The maximum surface area obtained for these nanoparticles was 99.4 m 2 /g. Also, performance of ternary oxides was examined in the reactor test, as a catalyst.

Preparing and Optimization of Cerium-Lanthanum-Cobalt Ternary Mixed Oxide as Catalyst for SO₂ Reduction to Sulfur

“…As observed, the highest nitrogen adsorption was found for ternary Ce/La(10)/Co(8) catalyst. Total pore volume of single Ce2O3 and ternary Ce/La(10) /Co (8) and Ce/La(12)/Co(12) catalysts obtained at the highest relative pressure (p/p0 = 0.99) were determined as 0.125 cm 3 g −1 , 0.154 cm 3 g −1 and 0.073 cm 3 g −1 , respectively. Also, BJH pore size distributions of single Ce2O3 and ternary Ce/La(10)/Co (8) and Ce/La(12)/Co(12) catalysts are indicated in Figure 8.…”

“…Total pore volume of single Ce2O3 and ternary Ce/La(10) /Co (8) and Ce/La(12)/Co(12) catalysts obtained at the highest relative pressure (p/p0 = 0.99) were determined as 0.125 cm 3 g −1 , 0.154 cm 3 g −1 and 0.073 cm 3 g −1 , respectively. Also, BJH pore size distributions of single Ce2O3 and ternary Ce/La(10)/Co (8) and Ce/La(12)/Co(12) catalysts are indicated in Figure 8. As observed, the highest amount of mesopores (2−50 nm) was found for ternary Ce/La (10) /Co(8) among the synthesized catalysts.…”

“…XRD analysis of single Ce2O3 and ternary Ce/La(10) /Co (8) and Ce/La(12)/Co(12) (Ce with 12% La and 12% Co) catalysts before reactor tests are illustrated in Figure 4. As observed, distinct crystal planes containing (111), (200), (220), (311), (222), (400), and (311) for all catalysts corresponded to the cerium oxide phase.…”

“…Nitrogen adsorption isotherms for single Ce2O3 and ternary Ce/La(10)/Co (8) and Ce/La(12)/Co(12) catalysts are presented in Figure 7. As observed, the highest nitrogen adsorption was found for ternary Ce/La(10)/Co(8) catalyst.…”

“…In literature, various ternary combinations of cerium ox-ide have been used for different applications. Examples are Ce-Ti-Zr for catalytic ozonation in bubble column [1], Ce-Cu-V for carbon black oxidation [2], Ce-Co-Zr for methane dry reforming [3], Ce-Ni-La for partial oxidation of methane [4], Ce-Ca-Mn for CO2 oxidative coupling of methane [5], Ce-Ni-Zr for hydrogen storage [6], and Ce-La-Cu for SO2 reduction to sulfur by methane [7,8].…”