Catalytic endothermic reactions of exo-tetrahydrodicyclopentadiene with zeolites and improvement of heat of reactions

Kim, Joongyeon; Hyeon, Dong Hun; Chun, Byung Hee; Jeong, Byung Hun; Han, Jeong Sik; Kim, Sung Hyun

doi:10.1016/j.cattod.2013.10.045

Cited by 26 publications

(26 citation statements)

References 19 publications

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“…In the view, the endothermic cracking of the JP-10 is becoming particularly important especially when the physical heat is insufficient. Additionally, the small molecular cracking products, such as lighter hydrocarbons and hydrogen, are benefit for the ignition and combustion of fuels [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Quasi-homogeneous catalytic cracking of JP-10 over high hydrocarbon dispersible nanozeolites

Sun

Liu

Wang

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Quasi-homogeneous catalytic cracking of JP-10 over high hydrocarbon dispersible nanozeolites

Sun

Liu

Wang

et al. 2015

Fuel

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“…41 In general, zeolite frameworks are solely microporous in nature, but distinct ZSM-5 structures with both micropores and mesopores such as NaZSM-5, HZSM-5, and HZSM-5 nanosheets can be synthesized with a mesopore diameter of 2 to 50 nm. 13,33,37 These dimensions can be compared to the JP-10 molecule holding a maximum diameter of 0.67 nm and a minimum diameter of 0.38 nm. 10,42 The pores create straight and sinusoidal channels throughout the structure and allow molecules such as JP-10 to diffuse and to react with interior surface sites, which leads to the catalytic decomposition of JP-10.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, JP-10 is thought to react preferentially with the acidic sites of the mesopores. 13,34,35 Extensive research exists from the material science community on the cracking of JP-10 in the presence of these zeolites. Due to the limited space in this journal, only key findings will be reported, which are important to place the present experiments into context.…”

Section: Introductionmentioning

confidence: 99%

“…Xing et al 34 examined the decomposition and oxidation of JP-10 over ZSM-5 in the temperature ranges from 773 to 873 K; the authors revealed that cracking rates of JP-10 improved by more than 45% compared to non-catalyzed thermal cracking with major products reported in Table S2. Hence, ZSM-5 catalysts have outstanding performance in catalytic cracking and oxidation of JP-10 due to the robust open silica structure, 43 ideal pore size, 13,35 and number of catalytic acidic sites in the ZSM-5 framework. 13,35 However, unwanted side effects such as the deactivation of the zeolite catalyst by coke formation and dealumination processes during the decomposition and oxidation of JP-10 have not been solved yet.…”

Section: Introductionmentioning

confidence: 99%

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Catalytic Effects of Zeolite Socony Mobil-5 (ZSM-5) on the Oxidation of Acoustically Levitated exo-Tetrahydrodicyclopentadiene (JP-10) Droplets

et al. 2021

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Jet propulsion 10 (JP-10) droplets with and without aluminum nanoparticles in conjunction with HZSM-5 zeolite and surfactants were ultrasonically levitated, and their oxidation processes were explored to identify how the oxidation process of JP-10 is catalytically affected by the HZSM-5 zeolites and how the surfactant and Al NPs in the system impacted the key experimental parameters of the ignition such as ignition delay time, burn rate, and the maximum temperatures. Singly levitated droplets were ignited using a carbon dioxide laser under an oxygen−argon atmosphere. Pure JP-10 droplets and JP-10 droplets with silicon dioxide of an identical size distribution as the zeolite HZSM-5 did not ignite in strong contrast to HZSM-5-doped droplets. Acidic sites were found to be critical in the ignition of the JP-10. With the addition of the surfactant, the characteristic features of the JP-10 ignition were improved, so the ignition delay time of the zeolite-JP-10 samples were decreased by 2−3 ms and the burn rates were increased by 1.3 to 1.6 × 10 5 K s −1 . The addition of Al NPs increased the maximum temperatures during the combustion of the systems by 300−400 K. Intermediates and end products of the JP-10 oxidation over HZSM-5 were characterized by UV−vis emission and Fourier-transform infrared transmission spectroscopies, revealing key reactive intermediates (OH, CH, C 2 , O 2 , and HCO) along with the H 2 O molecules in highly excited rovibrational states. Overall, this work revealed that acetic sites in HZSM-5 are critical in the catalytic ignition of JP-10 droplets with the addition of the surfactant and Al NPs, enhancing the oxidation process of JP-10 over HZSM-5 zeolites.

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“…Over the last few decades, catalytic cracking of liquid hydrocarbons has been well-established for thermal management system of hypersonic aircrafts [1,2]. In this system, hydrocarbons act as, not only the power source through combustion, but also as a coolant to remove the waste heat from aircrafts, through the cracking process [3][4][5]. Typically, wall-coated HZSM-5 zeolite membrane could meet the demand of a hypersonic flight, where extreme working conditions, such as elevated temperature and elevated pressure (above 400 • C and 3.4-6.9 MPa, i.e., the supercritical conditions) are used, because it can diminish the pressure drop and thermal resistance of the reactor [6,7].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of the Hierarchical HZSM-5 Membrane with Tunable Mesoporosity for Catalytic Cracking of n-Dodecane

et al. 2019

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Hierarchical HZSM-5 membranes were prepared on the inner wall of stainless steel tubes, using amphiphilic organosilane (TPOAC) and mesitylene (TMB) as a meso-porogen and a swelling agent, respectively. The mesoporosity of the HZSM-5 membranes were tailored via formulating the TPOAC/Tetraethylorthosilicate (TPOAC/TEOS) ratio and TMB/TPOAC ratio, in synthesis gel, and the prepared membranes were systematically characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), N2 adsorption–desorption, N2 permeation, inductively coupled plasma (ICP), in situ fourier transform infrared (FT-IR), ammonia temperature-programmed desorption (NH3-TPD), etc. It was found that the increase of the TPOAC/TEOS ratio promoted a specific surface area and diffusivity of the HZSM-5 membranes, as well as decreased acidity; the increase of the TMB/TPOAC ratios led to an enlargement of the mesopore size and diffusivity of the membranes, but with constant acid properties. The catalytic performance of the prepared HZSM-5 membranes was tested using the catalytic cracking of supercritical n-dodecane (500 °C, 4 MPa) as a model reaction. The hierarchical membrane with the TPOAC/TEOS ratio of 0.1 and TMB/TPOAC ratio of 2, exhibited superior catalytic performances with the highest activity of up to 13% improvement and the lowest deactivation rate (nearly a half), compared with the microporous HZSM-5 membrane, due to the benefits of suitable acidity, together with enhanced diffusivity of n-dodecane and cracking products.

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Catalytic endothermic reactions of exo-tetrahydrodicyclopentadiene with zeolites and improvement of heat of reactions

Cited by 26 publications

References 19 publications

Quasi-homogeneous catalytic cracking of JP-10 over high hydrocarbon dispersible nanozeolites

Quasi-homogeneous catalytic cracking of JP-10 over high hydrocarbon dispersible nanozeolites

Catalytic Effects of Zeolite Socony Mobil-5 (ZSM-5) on the Oxidation of Acoustically Levitated exo-Tetrahydrodicyclopentadiene (JP-10) Droplets

Fabrication of the Hierarchical HZSM-5 Membrane with Tunable Mesoporosity for Catalytic Cracking of n-Dodecane

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