Hydrogen production by sorption-enhanced steam reforming of glycerol

Dou, Binlin; Dupont, Valerie; Rickett, Gavin L.; Blakeman, Neil; Williams, Paul T.; Chen, Haisheng; Ding, Yulong; Ghadiri, Mojtaba

doi:10.1016/j.biortech.2009.02.036

Cited by 169 publications

(94 citation statements)

References 28 publications

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“…Around 500 • C, the product gas distribution shows more of CH 4 and CO 2 conforming methanation and water gas shift reaction. At 600 • C increase in CO formation and decrease in CO 2 show that the reverse water gas shift reaction is predominant in (5) and (2) [31][32][33][34]. A nominal increment is observed in H 2 % at 600 • C temperature: Figure 9 and Table 3 explain the gas distribution at 600 • C 8 Figure 10(a) shows the glycerol conversion as a function of accelerated ageing for 20 experimental cycles (each cycle is 600 • C/1 h and 700 • C/1 h; feed rate is doubled) at 1 : 9 GWMRs.…”

Section: Effect Of Temperaturementioning

confidence: 98%

Steam Reforming of Glycerol for Hydrogen Production over Ni/SiO2 Catalyst

Sadanandam

Sreelatha

Sharma

et al. 2012

ISRN Chemical Engineering

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The performance of Ni/SiO 2 catalyst for glycerol reforming has been investigated in fixed-bed reactor using careful tailoring of the operational conditions. In this paper, a commercial Engelhard catalyst has been sized and compared to gas product distribution versus catalyst size, water-to-carbon ratio, and stability of the catalyst system. Ni/SiO 2 catalysts of three sizes (2 × 2, 2 × 4, and 3×5 mm) are evaluated using glycerol: water mixture at 600 • C to produce 2 L H 2 g −1 cat h −1 . The results indicate that 3×5 mm size pellet is showing minimum coking and maintaining same level of conversion even after several hours of reforming activity. Whereas studies on 2 × 2 and 2 × 4 mm pellets indicate that carbon formation is affecting the reforming activity. Under accelerated aging studies, with 1 : 9 molar ratio of glycerol to water, 3 mg carbon g −1 cat h −1 was generated in 20 cycles, whereas 1 : 18 feed produced only 1.5 mg carbon g −1 cat h −1 during the same cycles of operation. The catalysts were characterized before and after evaluation by X-ray diffraction (XRD), BET surface area, scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDAX), CHNS analysis, transmission electron microscopy (TEM), and X-ray photo electron spectroscopy (XPS).

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Section: Effect Of Temperaturementioning

confidence: 98%

Steam Reforming of Glycerol for Hydrogen Production over Ni/SiO2 Catalyst

Sadanandam

Sreelatha

Sharma

et al. 2012

ISRN Chemical Engineering

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“…Calcium-looping PCC, based on the reversible reaction CaO+CO 2 CaCO 3 , can be implemented using two parallel fluidized beds operated as a carbonator and a regenerative calciner, typically at ≥ 650 o C in ~ 15% CO 2 and ≥ 950 o C in ~100% CO 2 respectively 2 . Another area of application of CaO powder sorbents lies in steam reforming for the production of H 2 , whereby removal of the CO 2 co-product shifts the reaction equilibrium in favor of greater H 2 yields and purity 3 . Conditions for carbonation are comparable to those of PCC, i.e.…”

Section: Introductionmentioning

confidence: 99%

“…The present work concerns an alternative wet chemical powder synthesis method for CaZrO 3 /CaO sorbent powders, tested over 30 carbonation-decarbonation cycles. We show that the overall performance is superior to other Zr-modified CaO sorbents produced by solution-precipitation routes: near-stable multicycle CO 2 capture performance, after an initial rise, is demonstrated for mild conditions relevant to SESR involving carbonation at 650 °C in 15 % CO 2 and calcination in air at 800 °C.…”

Section: Introductionmentioning

confidence: 99%

Durability of CaO–CaZrO₃ Sorbents for High-Temperature CO₂ Capture Prepared by a Wet Chemical Method

Zhao¹,

Bilton²,

Brown³

et al. 2014

Energy Fuels

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eprints@whiterose.ac.uk https://eprints.whiterose.ac.uk/ Reuse Unless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version -refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher's website. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request. initial rise in CO 2 uptake capacity in the first 10 carbonation-decarbonation cycles, increasing from 0.31g-CO 2 / g-sorbent in cycle 1 to 0.37 g-CO 2 / g-sorbent in cycle 10 and stabilizing at this value for the remainder of the 30 cycles tested: carbonation at 650 in 15% CO 2 ; calcination at 800 in air. Under more severe conditions of calcination at 950 in 100% CO 2 following carbonation at 650 in 100 % CO 2 , the best overall performance was for a sorbent with 30 wt% CaZrO 3 : 70 wt% CaO (the highest Zr ratio studied), with an initial uptake of 0.36 g-CO 2 /g-sorbent decreasing to 0.31 g-CO 2 /g-sorbent at the 30 th cycle.Electron microscopy revealed CaZrO 3 was present in the form of ≤ 0.5 µm cuboid and 20-80 nm particles dispersed within a porous matrix of CaO/CaCO 3 ; the nanoparticles are considered to be the principal reason for promoting multicycle durability.

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“…Lyon and Cole [3] have shown that H 2 rich syngas can be produced autothermally from methane and diesel fuel using a CLR system, also incorporating a calcium loop for CO 2 -sorption enhancement of the steam reforming. Previous work by the authors has demonstrated high reactant conversions using fuels with Ni and Ca looping such as methane [4], vegetable oil [5], crude glycerol [6], and waste cooking oil [7]. A crucial requirement of the CLR process is that the fuel can reduce the OTM during the beginning of the fuel feed step to enable the steam reforming to start from cycle to cycle.…”

Section: Introductionmentioning

confidence: 99%

Biomass pyrolysis oils for hydrogen production using chemical looping reforming

Lea‐Langton

Zin

Dupont

et al. 2012

International Journal of Hydrogen Energy

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This study considers the feasibility of using highly oxygenated and volatile pyrolysis oils from biomass wastes as sustainable liquid fuels for conversion to a hydrogen-rich syngas using the chemical looping reforming process in a packed bed. Pine oil and palm empty fruit bunches oil-'EFB'-were investigated with a Ni/Al 2 O 3 catalyst doubling as oxygen transfer material (OTM). The effect of molar steam to carbon ratio (S/C) and weight hourly space velocity were investigated at 600 °C and atmospheric pressure on the fuel and steam conversion, the H 2 yield and the H-and Cproducts distribution. With a downward fuel feed configuration and using a H 2 -reduced catalyst, maximum averaged fuel conversions of ~97% for pine oil and 89% for EFB oil were achieved at S/C ratios of 2.3 and 2.6 respectively (on a water-free oil basis). This produced H 2 with a yield efficiency of approximately 60 % for pine oil and 80% for EFB oil notwithstanding equilibrium limitations, and with little CH 4 byproduct. Both oils exhibited very similar outputs with varying S/C. Upon a short number of cycles, i.e. starting from an oil-reduced catalyst, the fuel conversion dropped slightly but the steam conversion was constant, resulting in a slow decrease in H 2 yield. Despite their high level of oxygen content, the pyrolysis oils were shown to maintain close to 90% reduction of the oxidised catalyst upon repeated cycles, but the rate of reduction decreased with cycling.

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Hydrogen production by sorption-enhanced steam reforming of glycerol

Cited by 169 publications

References 28 publications

Steam Reforming of Glycerol for Hydrogen Production over Ni/SiO2 Catalyst

Steam Reforming of Glycerol for Hydrogen Production over Ni/SiO2 Catalyst

Durability of CaO–CaZrO₃ Sorbents for High-Temperature CO₂ Capture Prepared by a Wet Chemical Method

Biomass pyrolysis oils for hydrogen production using chemical looping reforming

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Hydrogen production by sorption-enhanced steam reforming of glycerol

Cited by 169 publications

References 28 publications

Steam Reforming of Glycerol for Hydrogen Production over Ni/SiO2 Catalyst

Steam Reforming of Glycerol for Hydrogen Production over Ni/SiO2 Catalyst

Durability of CaO–CaZrO3 Sorbents for High-Temperature CO2 Capture Prepared by a Wet Chemical Method

Biomass pyrolysis oils for hydrogen production using chemical looping reforming

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Durability of CaO–CaZrO₃ Sorbents for High-Temperature CO₂ Capture Prepared by a Wet Chemical Method