Photocatalytic reduction of carbon dioxide into gaseous hydrocarbon using TiO2 pellets

Tan, Seng Sing; Zou, Linda; Hu, Eric

doi:10.1016/j.cattod.2006.02.057

Cited by 221 publications

(121 citation statements)

References 7 publications

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“…This is the case of vapour phase reaction, characterised by CO 2 excess. This mechanism involves the formation of C radicals that recombine with H originated from water [63].…”

Section: Vapour Phase Photocatalytic Resultsmentioning

confidence: 99%

Liquid vs. Gas Phase CO2 Photoreduction Process: Which Is the Effect of the Reaction Medium?

et al. 2017

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Abstract:The use of carbon dioxide, the most concerning environmental issue of the 21st century, as a feedstock for fuels productions still represents an innovative, yet challenging, task for the scientific community. CO 2 photoreduction processes have the potential to transform this hazardous pollutant into important products for the energy industry (e.g., methane and methanol) employing a photocatalyst and light as the only energy input. In order to design an effective process, the high sustainability of this reaction should be matched with the perfect reaction conditions to allow the reactant, photocatalyst, and light source to come together: therefore, the choice of reaction conditions, and in particular its medium, is a crucial issue that needs to be investigated. Throughout this paper, a careful study of carbon dioxide photoreduction in liquid and vapour phases are reported, focusing on their effect on catalyst performances in terms of light harvesting, productivity, and selectivity. Different from most papers in the literature, catalytic tests were performed under extremely low light irradiance, in order to minimise the primary energy input, highlighting that this experimental variable has a great effect on the reaction pathway and, thus, product distribution.

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“…This is the case of vapour phase reaction, characterised by CO 2 excess. This mechanism involves the formation of C radicals that recombine with H originated from water [63].…”

Section: Vapour Phase Photocatalytic Resultsmentioning

confidence: 99%

Liquid vs. Gas Phase CO2 Photoreduction Process: Which Is the Effect of the Reaction Medium?

et al. 2017

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show abstract

“…The photocatalytic conversion of CO 2 to organic compounds is quite complex and most of the researchers have hypothesized multielectron transfer processes to obtain the final hydrogenated products [4,8,17,[42][43][44].…”

Section: Photocatalytic Resultsmentioning

confidence: 99%

“…The photocatalytic reduction of CO 2 on TiO 2 has been studied in aqueous solutions [4,[6][7][8][9][10][11][12][13], in liquid CO 2 [14] and in solid-gas systems [15][16][17][18]. The efficiency of the conversion of CO 2 to fuels in aqueous suspension systems was very low when H 2 O was used as the reductant but higher yields of products were obtained in the presence of molecules acting as hole sacrificial scavengers.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic CO2 Reduction in Gas-Solid Regime in the Presence of Bare, SiO2 Supported or Cu-Loaded TiO2 Samples

Bellardita¹,

Paola²,

García‐López³

et al. 2013

COC

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Both commercial and home prepared (HP) TiO2 samples have been tested for the photocatalytic reduction of CO2. (HP) TiO2 powders were prepared by using TiCl4 or Ti(OC4H9)4 as the precursors to obtain HP1 and HP2 samples, respectively. Also HP Cu-loaded and SiO2 supported TiO2 powders were prepared. The HP samples were more active than the commercial ones for the photoreduction of CO2 with and without water vapour. HP1 produced mainly formaldehyde, HP2 principally methane. Acetaldehyde was found to be the primary product obtained when HP1 was supported on SiO2. The addition of Cu increased the photocatalytic reactivity either of bulk and SiO2-supported HP1. In particular, 1 wt % of Cu improved the formaldehyde yield obtained with the bare HP1 by one order of magnitude. Differently, the presence of Cu or SiO2 in the HP2 samples markedly reduced the production of methane.

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“…process [8][9][10], enzymatic/biochemical process [11][12][13], and photo catalytic/photochemical process [14][15][16][17][18][19][20]. Among them, photo catalytic reduction seems the most intensively developed method.…”

mentioning

confidence: 99%

“…CO 2 photo reduction with water vapor catalyzed by TiO 2 pellet [19], as well as by modified titania, such as Cu/TiO 2 -SiO 2 [20], Cu-I-TiO 2 [21], and Ag/TiO 2 [22], have been success to form CO and methane as the products.…”

mentioning

confidence: 99%

Influences of Metals and Acids on the Photo Reduction of CO2 under Catalysis of TiO2

Wahyuni¹,

Kusumaningrum²,

Mulyana³

et al. 2015

JCCE

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Conversion of green house CO 2 into fuel gas in the presence of reducing agent sources that are Fe and Zn powder, as well as hydrogen ions supplier such as nitric and acetic acids by photo catalytic reduction with water vapor on TiO 2 has been studied. The photo reduction was carried out by batch technique, using a UV lamp with a wave length of 290-400 nm, as a photon source. The gasses produced from the photo reduction were determined by gas chromatography. The research results indicate that the photo reduction of CO 2 has successfully produced methane as a dominant product. The presence of the metals in addition to be able to improve the methane yield, it is also able to induce ethylene formation. Meanwhile the acids can considerably enhance the methane yield without formation of ethylene. Furthermore, the enhancement is observed to be controlled by mass of the metals, and the acid concentrations. It is also found that Zn and HNO 3 show stronger effect in the increasing CO 2 photo reduction.

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Photocatalytic reduction of carbon dioxide into gaseous hydrocarbon using TiO2 pellets

Cited by 221 publications

References 7 publications

Liquid vs. Gas Phase CO2 Photoreduction Process: Which Is the Effect of the Reaction Medium?

Liquid vs. Gas Phase CO2 Photoreduction Process: Which Is the Effect of the Reaction Medium?

Photocatalytic CO2 Reduction in Gas-Solid Regime in the Presence of Bare, SiO2 Supported or Cu-Loaded TiO2 Samples

Influences of Metals and Acids on the Photo Reduction of CO2 under Catalysis of TiO2

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