Integrated CO2 capture and methanation (ICCM) is attracting more attention to promote the reduction of emission. This work developed applied a set combined materials using Ru/CeO2 as catalyst physically mixed Li, Na, K-doped MgO adsorbent for ICCM process. The influences morphologies CeO2 (rod, particle, cube) in are investigated explicitly terms conversion CH4 yield. Compared with cube morphol...

In this work, polypyrrole/CeO2 nanocomposite (NC) was synthesized in the presence of methylorange as a reactive self-degraded soft template. The field emission scanning electron microscopy(FESEM) images indicate that the CeO2 NPs have a nucleus effect and cause a homogenous PPycore–shell type morphology with an encapsulation of the CeO2 core by the PPy shell. The effect ofNC on acrylic waterbor...

Current industrial catalysts for the water-gas shift reaction are commonly mixtures of Fe-Cr and Zn-Al-Cu oxides, used at temperatures between 350-500oC and 180250oC, respectively. These oxide catalysts are pyrophoric and normally require lengthy and complex activation steps before usage. Improved catalysts are being sought, particularly for lower temperature (e.g., at T<150oC, equilibrium lowe...

A single-step, self-contained method for determining the crystallite-size distribution and shape from experimental x-ray line profile data is presented. It is shown that the crystallite-size distribution can be determined without invoking a functional form for the size distribution, determining instead the size distribution with the least assumptions by applying the Bayesian/MaxEnt method. The ...

This communication describes the fabrication of Pt/CeO2 nanotube@SiO2 core-shell catalysts applied to highly efficient water-gas shift reaction, where the initial CO conversion is 30.2% at 250 °C. Pt/CeO2 nanotube@SiO2 core-shell catalysts show outstanding thermal stability, even after accelerated aging under reaction conditions at 450 °C for 6 h, and the morphology is also unchanged after ther...

Synthesis of dimethyl carbonate (DMC) from CO2 and methanol under milder reaction conditions was performed using reduced cerium oxide catalysts and reduced copper-promoted Ce oxide catalysts. Although the conversion of methanol was low (0.005-0.11%) for 2 h of reaction, DMC was synthesized as low as 353 K and at total pressure of as low as 1.3 MPa using reduced Cu-CeO2 catalyst (0.5 wt% of Cu)....

Y. H. Liu, J. C. Zuo, X. F. Ren, College of Material Science and Engineering, Shenyang Ligong University, Shenyang,Liaoning, China. L. YONG, School of Material and Metallurgy, Northeastern University, Liaoning, Liaoning, China In this paper cerium oxide (CeO2) nanoparticles with 200-300 nm in diameter were synthesized via a precipitation method using ammonia water and oxalic acid as precipitant...

Enhancement of oxygen ion conductivity in oxides is important for low-temperature (<500 °C) operation of solid oxide fuel cells, sensors and other ionotronic devices. While huge ion conductivity has been demonstrated in planar heterostructure films, there has been considerable debate over the origin of the conductivity enhancement, in part because of the difficulties of probing buried ion trans...

High-quality superconducting ~Tc'90 K, j c.10 6 A/cm at 77 K! epitaxial ~001! YBa2Cu3O72d films were grown by laser ablation on ~001! CeO2 /(11I02) Al2O3. An interaction between YBa2Cu3O72d and CeO2 would influence the structure and the superconducting parameters. A marked degradation of the superconducting transition temperature (Tc574 K) was observed when twenty 2-nm-thick CeO2 layers were in...