The copper–ceria (CuOx/CeO2) system has been extensively investigated in several catalytic processes, given its distinctive properties and considerable low cost compared to noble metal-based catalysts. fine-tuning of key parameters, e.g., the particle size shape individual counterparts, can significantly affect physicochemical subsequently performance binary oxide. To this end, present work foc...

The water–gas shift (WGS) activity of Pt/TiO2-based powdered and structured catalysts was investigated using realistic feed compositions that are relevant to the high-temperature (HTS) low-temperature (LTS) reaction conditions. promotion TiO2 support with small amounts alkali- or alkaline earth-metals resulted in enhancement WGS 0.5%Pt/TiO2(X) (X = Na, Cs, Ca, Sr). use bimetallic (Pt–M)/TiO2 (M...

A flame synthesis method has been used to prepare nanosized, high-surface-area Cu-Ce-O, Ni-Ce-O, and Fe-Ce-O catalysts from aqueous solutions of metal acetate precursors. The particles were formed by vaporization of the precursors followed by reaction and then gas to particle conversion. The specific surface areas of the synthesized powders ranged from 127 to 163 m(2)/g. High-resolution transmi...

Iron-containing spinels, also known as ferrospinels, are widely used catalysts for the water gas shift (WGS) reaction. The catalytic activity of spinels containing transition metal ions as dopants or modifiers is influenced by the acid base and redox properties of these ions as well as by their site occupancy amongst the octahedral and tetrahedral sites in the spinel structure. It has been esta...

A sorption-enhanced water-gas shift (SEWGS) system providing CO2-free synthesis gas (CO + H2) for jet fuel production from pure CO was studied. The (WGS) reaction catalyzed by a commercial Cu/ZnO/Al2O3 catalyst and carried out with in-situ CO2 removal on 20 wt% potassium-promoted hydrotalcite-derived sorbent. Catalyst activity investigated in fixed bed tubular reactor. Different sorbent materia...

Effect of water gas shift reaction (CO+H2O=CO2+H2) on wustite reduction has been investigated by a transient, non-isothermal mathematical model based on grain model. In this model, wustite porous pellet is reduced using Syngas, namely a mixture of hydrogen, carbon monoxide, carbon dioxide and water vapor. For this purpose, governing equations containing continuity equation of species and energy...

We provide a detailed thermodynamic and economic analysis of two novel alternatives to the “standard” Shell coal IGCC with CO2 capture. In the first, the syngas coolers are replaced by a “partial water quench” where the raw syngas stream is cooled and humidified via direct injection of hot water. This design is less costly, but also less efficient. The second approach retains syngas coolers but...

IGCC (Integrated Gasification Combined Cycle) technology is being developed to enable electricity to be generated at high efficiency and low emissions. Continuous improvement is essential to make IGCC reliable and costeffective. As environmental concerns over carbon emissions escalate, development of a practical carbon capture and storage (CCS) technology has become an important issue. Combinin...