Photocatalytic degradation of oil industry hydrocarbons models at laboratory and at pilot-plant scale

Vargas, Ronald; Núñez, Oswaldo

doi:10.1016/j.solener.2009.12.005

Cited by 47 publications

(36 citation statements)

References 21 publications

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“…Here, reviewed photocatalytic reactors can be divided in to two categories, i.e., (i) lab-scale reactors [74,[101][102][103][104][105][106][107][108][109][110][111], where the volume of reactant solution is <1 L, and (ii) pilot plant-scale reactors [44,[112][113][114][115][116], where the reactor volume is >5 L. Recent innovations in lab-scale reactors include the use of energy-efficient UV/visible light emitting diodes (LEDs) as light sources [101][102][103][104][105], the design of rotating disc-type reactor models [74,106], the fabrication of NTO-immobilized catalytic beds [107,108], and post-separation/reuse of NTO powder catalysts [109][110][111]. LEDs are light sources that need less energy and, therefore, LED-based photocatalytic reactors are more energy-efficient systems.…”

Section: Photocatalytic Reactorsmentioning

confidence: 99%

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Photocatalytic Water Treatment by Titanium Dioxide: Recent Updates

Varghese²,

2012

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Photocatalytic water treatment using nanocrystalline titanium dioxide (NTO) is a well-known advanced oxidation process (AOP) for environmental remediation. With the in situ generation of electron-hole pairs upon irradiation with light, NTO can mineralize a wide range of organic compounds into harmless end products such as carbon dioxide, water, and inorganic ions. Photocatalytic degradation kinetics of pollutants by NTO is a topic of debate and the mostly reporting Langmuir-Hinshelwood kinetics must accompanied with proper experimental evidences. Different NTO morphologies or surface treatments on NTO can increase the photocatalytic efficiency in degradation reactions. Wisely designed photocatalytic reactors can decrease energy consumption or can avoid post-separation stages in photocatalytic water treatment processes. Doping NTO with metals or non-metals can reduce the band gap of the doped catalyst, enabling light absorption in the visible region. Coupling NTO photocatalysis with other water-treatment technologies can be more beneficial, especially in large-scale treatments. This review describes recent developments in the field of photocatalytic water treatment using NTO.

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Section: Photocatalytic Reactorsmentioning

confidence: 99%

“…Recently reported pilot plant photocatalytic reactors have mainly utilized natural sunlight as a light source [44,112,113,115,116]. However, an UV light-based pilot plant reactor has also been reported [114].…”

Section: Photocatalytic Reactorsmentioning

confidence: 99%

Photocatalytic Water Treatment by Titanium Dioxide: Recent Updates

Varghese²,

2012

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“…This parameter represents the amount of oxygen required to oxidize the organic matter contained in a sample; its decrease means a lower concentration of total organic carbon in the system. [19][20][21]26 The analysis of COD is used to measure the amount of organic matter in waters and it is widely used in water treatment systems to evaluate the efficiency of mineralization processes, both in the laboratory and in industry. 42 This analysis includes only systems with the higher percentages of degradation ( …”

Section: Microemulsionsmentioning

confidence: 99%

“…19,[23][24][25][26] The evaluation of photochemical and photocatalytic methodologies using solar simulation in laboratory scale is an appropriate strategy for reporting efficiencies of photo-induced processes that are capable of being applied on larger scales. 18,[20][21][22] Thus it allows to corroborate the effectiveness of procedures considered, and it gives an approximation of its performance under the action of sunlight in the ultraviolet and visible region of the spectrum.…”

Section: Introductionmentioning

confidence: 97%

“…14,16 Direct application process in photocatalytic reactors using artificial radiation involves operating costs that may hinder and/or decrease its implementation. 17,18 Therefore, this methodology should be evaluated considering the use of solar radiation, [17][18][19][20][21][22] so that its use is competitive, technologically and economically. This approach is particularly attractive for the recovery or degradation of sparingly soluble contaminants, especially in environments containing surfactants.…”

Section: Introductionmentioning

confidence: 99%

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Mechanistic aspects of photocatalytic activity of metalloporphyrin–titanium mixtures in microemulsions

et al. 2016

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Photocatalytic activity of titanium citrate and its water-in-oil microemulsions mix with zinc (II) tetraphenylporphyrin have been studied by means of adding 4-chlorophenol and following its degradation using artificial ultraviolet and visible light. 4-Chlorophenol is degraded in 71 and 86%, respectively, in 30 min with the generation of various intermediaries, whose possible formation mechanisms have been proposed based in the results of this research. The generation of benzene derivatives, different to those usually reported for this type of treatment, suggests the possibility of controlling the generation of intermediaries by simply changing the type of surfactant. In the case discussed here, we have derived a simple method for isomer generation of trimethylbenzene using a model organohalogenated compound as water contaminant and cetyltrimethylammonium bromide as surfactant.

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Novel floating photocatalysts based on polyurethane composite foams modified with silver/titanium dioxide/graphene ternary nanoparticles for the visible‐light‐mediated remediation of diesel‐polluted surface water

Zhang

et al. 2016

J of Applied Polymer Sci

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Photocatalyst loading on a floating substitute is accepted as a promising method for the remediation of diesel-polluted surface water. Therefore, novel photocatalysts based on polyurethane foams modified with silver/titanium dioxide/graphene ternary nanoparticles (PU-Ag/P25/G) were synthesized and investigated. Scanning electron microscopy, energy-dispersive X-ray spectrometry, X-ray diffraction, Fourier transform infrared spectroscopy, and UV-visible spectroscopy showed the coexistence of Ag, Degussa P25 (P25), and graphene and the nanoscale dispersion of nanoparticles in the matrix and on the surface of the polyurethane (PU) foam. The diesel adsorption capacity of the photocatalyst reached 96 g/g. The maximum diesel degradation was found to be 76% in a period of 16 h. Compared with polyurethane-foam-supported P25/graphene (PU-P25/G) and polyurethane-foam-supported P25 (PU-P25), all of the adsorption isotherm and degradation kinetics followed the order PU-Ag/P25/G > PU-P25/G > PU-P25 > PU; this was due to the loading of different nanoparticles. Moreover, the degradation efficiency was reduced only 5% after five consecutive reactions; this showed good stability and reusability of the photocatalyst for surface water restoration. V C 2016 Wiley Periodicals, Inc. J.Appl. Polym. Sci. 2016, 133, 43400.

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Photocatalytic degradation of oil industry hydrocarbons models at laboratory and at pilot-plant scale

Cited by 47 publications

References 21 publications

Photocatalytic Water Treatment by Titanium Dioxide: Recent Updates

Photocatalytic Water Treatment by Titanium Dioxide: Recent Updates

Mechanistic aspects of photocatalytic activity of metalloporphyrin–titanium mixtures in microemulsions

Novel floating photocatalysts based on polyurethane composite foams modified with silver/titanium dioxide/graphene ternary nanoparticles for the visible‐light‐mediated remediation of diesel‐polluted surface water

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