Experimental study and modelling of thermal runaway: Application to dichromate catalysed hydrogen peroxide decomposition

Frikha, Nader; Schaer, Éric; Houzelot, Jean-Léon

doi:10.1016/j.tca.2006.07.024

Cited by 6 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A variety of catalysts have been developed for lowering the activation energy associated with H 2 O 2 decomposition including metal catlaysts , ( e.g. , Pt, Pd, Au and Ag) as well as metal oxide catalysts − ( e.g. , MnO2, Fe 2 O 3 , K 2 Cr 2 O 7 ).…”

Section: Resultsmentioning

confidence: 99%

High Aspect Ratio Carbon Nanotube Membranes Decorated with Pt Nanoparticle Urchins for Micro Underwater Vehicle PropulsionviaH₂O₂Decomposition

et al. 2015

View full text Add to dashboard Cite

The utility of unmanned micro underwater vehicles (MUVs) is paramount for exploring confined spaces, but their spatial agility is often impaired when maneuvers require burst-propulsion. Herein we develop highaspect ratio (150:1), multiwalled carbon nanotube microarray membranes (CNT-MMs) for propulsive, MUV thrust generation by the decomposition of hydrogen peroxide (H 2 O 2 ). The CNT-MMs are grown via chemical vapor deposition with diamond shaped pores (nominal diagonal dimensions of 4.5 × 9.0 μm) and subsequently decorated with urchin-like, platinum (Pt) nanoparticles via a facile, electroless, chemical deposition process. The Pt-CNT-MMs display robust, high catalytic ability with an effective activation energy of 26.96 kJ mol -1 capable of producing a thrust of 0.209 ± 0.049 N from 50% [w/w] H 2 O 2 decomposition within a compact reaction chamber of eight Pt-CNT-MMs in series. A n upward trend in the research and use of unmanned underwater vehicles (UUVs), and in particular micro underwater vehicles (MUVs, small UUVS between 1 and 50 cm in length), for exploration of confined spaces such as ship wrecks, submerged oil pipelines, and various military purposes has been observed over recent years. 1À3 The locomotion of these vehicles is typically controlled by propellerbased systems, which are often used for long-endurance missions. 4À6 However, propeller-based systems are usually limited in their ability to perform tight radius turns, burst-driven docking maneuvers, and lowspeed course corrections. ABSTRACT The utility of unmanned micro underwater vehicles (MUVs) is paramount for exploring confined spaces, but their spatial

show abstract

Section: Resultsmentioning

confidence: 99%

High Aspect Ratio Carbon Nanotube Membranes Decorated with Pt Nanoparticle Urchins for Micro Underwater Vehicle PropulsionviaH₂O₂Decomposition

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Their solution is called blue peroxochromatic acid, § at pH between 4 and 7 -violet deprotonated from of "peroxochromic acid" [Cr VI (O)(O2)(OH)] - § at least four Cr(V)-peroxocomplexes appearing at different pH and concentrations [19]. Potassium dichromate as a catalyst studied reaction has some advantages: it is easy to implement and the reaction rate can be controlled by H2O2 solution dilution [23].…”

Section: Potassium Dichromate (K2cr2o7)mentioning

confidence: 99%

Decomposition of hydrogen peroxide - kinetics and review of chosen catalysts

et al. 2018

View full text Add to dashboard Cite

Hydrogen peroxide is a chemical used in oxidation reactions, treatment of various inorganic and organic pollutants, bleaching processes in pulp, paper and textile industries and for various disinfection applications. It is a monopropellant, which, when purified, is self-decomposing at high temperatures or when a catalyst is present. Decomposing to yield only oxygen and water(disproportionation), hydrogen peroxide is one of the cleanest, most versatile chemicals available. The catalytic decomposition of hydrogen peroxide allows the use of various catalysts that will increase the rate of decomposition. Comparison and description of the most commonly used catalysts were presented in this review.

show abstract

“…A common feature in these exothermic reaction systems is the existence of hot spots induced by non-uniformities of catalyst packing, reactant concentration, as well as heating and cooling effects. [11][12][13] The temperature of heterogeneous reactions is often controlled by proportional-integral-derivative (PID) unit, where temperature around or inside a reactor will be monitored continuously.…”

Section: Introductionmentioning

confidence: 99%

Encapsulated nano-heat-sinks for thermal management of heterogeneous chemical reactions

et al. 2010

View full text Add to dashboard Cite

This paper describes a new way to control temperatures of heterogeneous exothermic reactions such as heterogeneous catalytic reaction and polymerization by using encapsulated nanoparticles of phase change materials as thermally functional additives. Silica-encapsulated indium nanoparticles and silica encapsulated paraffin nanoparticles are used to absorb heat released in catalytic reaction and to mitigate gel effect of polymerization, respectively. The local hot spots that are induced by nonhomogenous catalyst packing, reactant concentration fluctuation, and abrupt change of polymerization rate lead to solid to liquid phase change of nanoparticle cores so as to avoid thermal runaway by converting energies from exothermic reactions to latent heat of fusion. By quenching local hot spots at initial stage, reaction rates do not rise significantly because the thermal energy produced in reaction is isothermally removed. Nanoparticles of phase change materials will open a new dimension for thermal management of exothermic reactions to quench local hot spots, prevent thermal runaway of reaction, and change product distribution.

show abstract

Experimental study and modelling of thermal runaway: Application to dichromate catalysed hydrogen peroxide decomposition

Cited by 6 publications

References 14 publications

High Aspect Ratio Carbon Nanotube Membranes Decorated with Pt Nanoparticle Urchins for Micro Underwater Vehicle PropulsionviaH₂O₂Decomposition

High Aspect Ratio Carbon Nanotube Membranes Decorated with Pt Nanoparticle Urchins for Micro Underwater Vehicle PropulsionviaH₂O₂Decomposition

Decomposition of hydrogen peroxide - kinetics and review of chosen catalysts

Encapsulated nano-heat-sinks for thermal management of heterogeneous chemical reactions

Contact Info

Product

Resources

About

Experimental study and modelling of thermal runaway: Application to dichromate catalysed hydrogen peroxide decomposition

Cited by 6 publications

References 14 publications

High Aspect Ratio Carbon Nanotube Membranes Decorated with Pt Nanoparticle Urchins for Micro Underwater Vehicle PropulsionviaH2O2Decomposition

High Aspect Ratio Carbon Nanotube Membranes Decorated with Pt Nanoparticle Urchins for Micro Underwater Vehicle PropulsionviaH2O2Decomposition

Decomposition of hydrogen peroxide - kinetics and review of chosen catalysts

Encapsulated nano-heat-sinks for thermal management of heterogeneous chemical reactions

Contact Info

Product

Resources

About

High Aspect Ratio Carbon Nanotube Membranes Decorated with Pt Nanoparticle Urchins for Micro Underwater Vehicle PropulsionviaH₂O₂Decomposition

High Aspect Ratio Carbon Nanotube Membranes Decorated with Pt Nanoparticle Urchins for Micro Underwater Vehicle PropulsionviaH₂O₂Decomposition