Cr-free Fe-based metal oxide catalysts for high temperature water gas shift reaction of fuel processor using LPG

Lee, Joon Yeob; Lee, Dae Won; Lee, Kwan Young; Wang, Yong

doi:10.1016/j.cattod.2009.01.041

Cited by 53 publications

(18 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The first step, HT-WGS, operates in the temperature range of 350-450 °C, which has fast reaction rate but low CO equilibrium conversion values. The second stage, LT-WGS, generally performed in the range of 200-250 ºC, is thermodynamically favourable to further convert CO, but relatively slow in terms of reaction rate [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Effect of the preparation method on the catalytic activity and stability of Au/Fe2O3 catalysts in the low-temperature water–gas shift reaction

Soria

Pérez

Carabineiro

et al. 2014

Applied Catalysis A: General

View full text Add to dashboard Cite

The low temperature water-gas-shift reaction has been studied over a series of nanosized Au/Fe2O3 catalysts. The effect of the synthesis method on the catalytic activity has been analysed. A series of catalysts with different Au loadings has been prepared by different methods: Deposition-Precipitation (DP), Liquid Phase Reductive Deposition (LPRD) and Double Impregnation Method (DIM). The Au/Fe2O3 catalysts prepared by DP showed the highest CO conversion. The catalysts were characterised by hydrogen temperature programmed reduction (TPR-H2), high-resolution transmission electron microscopy (HRTEM), X-ray powder diffraction and X-ray photoelectron spectroscopy. TPR-H2 analysis revealed that gold promotes the reducibility of the Fe2O3 support, which is crucial in this redox reaction. HRTEM evidences a very good dispersion of gold over the iron support, with nanoparticles in the range 2.2-3.1 nm for the DP and LPRD series, and a negligible increase in the average particle size of the used samples. For the DIM series, much larger Au particles (~6.6 nm) were obtained.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of the preparation method on the catalytic activity and stability of Au/Fe2O3 catalysts in the low-temperature water–gas shift reaction

Soria

Pérez

Carabineiro

et al. 2014

Applied Catalysis A: General

View full text Add to dashboard Cite

show abstract

“…The vanadium-doped catalysts exhibit better activity compared to pure iron oxide and commercial catalyst. Lee et al [30] replaced Cr with Ni, Zn, Co doped in the iron oxide. Vanadium resists sintering as well as stabilizes the excess Fe(III) in the structure, thus favouring the successive oxidation and reduction cycles during the reaction and avoiding the formation of metallic iron which causes the catalyst deactivation.…”

Section: Cr-free Fe-based Catalystsmentioning

confidence: 99%

High-Temperature WGS Reaction

Reddy

Smirniotis²

2015

Water Gas Shift Reaction

View full text Add to dashboard Cite

“…The reaction is reversible and exothermic, thus it requires a two‐step operation including high temperature shift (HT‐WGS, 300–450ºC) and low temperature shift (LT‐WGS, 150–300ºC) to achieve high reaction rate and deep conversion. However, this process has some drawbacks such as complex operating, large catalyst volumes and high steam recycling . Recently, a membrane reactor (MR) integrating the reaction with product separation using a hydrogen‐selective membrane has been considered as an alternative strategy to optimize the process.…”

Section: Introductionmentioning

confidence: 99%

Pure H₂ production through hollow fiber hydrogen‐selective MFI zeolite membranes using steam as sweep gas

Zhang

Sun

2015

AIChE Journal

View full text Add to dashboard Cite

Hollow fiber MFI zeolite membranes were modified by catalytic cracking deposition of methyldiethoxysilane to enhance their H 2 /CO 2 separation performance and further used in high temperature water gas shift membrane reactor. Steam was used as the sweep gas in the MR for the production of pure H 2 . Extensive investigations were conducted on MR performance by variations of temperature, feed pressure, sweep steam flow rate, and steam-to-CO ratio. CO conversion was obviously enhanced in the MR as compared with conventional packed-bed reactor (PBR) due to the coupled effects of H 2 removal as well as counter-diffusion of sweep steam. Significant increment in CO conversion for MR vs. PBR was obtained at relatively low temperature and steam-to-CO ratio. A high H 2 permeate purity of 98.2% could be achieved in the MR swept by steam. Moreover, the MR exhibited an excellent long-term operating stability for 100 h in despite of the membrane quality.

show abstract

Cr-free Fe-based metal oxide catalysts for high temperature water gas shift reaction of fuel processor using LPG

Cited by 53 publications

References 24 publications

Effect of the preparation method on the catalytic activity and stability of Au/Fe2O3 catalysts in the low-temperature water–gas shift reaction

Effect of the preparation method on the catalytic activity and stability of Au/Fe2O3 catalysts in the low-temperature water–gas shift reaction

High-Temperature WGS Reaction

Pure H₂ production through hollow fiber hydrogen‐selective MFI zeolite membranes using steam as sweep gas

Contact Info

Product

Resources

About

Cr-free Fe-based metal oxide catalysts for high temperature water gas shift reaction of fuel processor using LPG

Cited by 53 publications

References 24 publications

Effect of the preparation method on the catalytic activity and stability of Au/Fe2O3 catalysts in the low-temperature water–gas shift reaction

Effect of the preparation method on the catalytic activity and stability of Au/Fe2O3 catalysts in the low-temperature water–gas shift reaction

High-Temperature WGS Reaction

Pure H2 production through hollow fiber hydrogen‐selective MFI zeolite membranes using steam as sweep gas

Contact Info

Product

Resources

About

Pure H₂ production through hollow fiber hydrogen‐selective MFI zeolite membranes using steam as sweep gas