Catalytic cracking of RP-3 jet fuel over wall-coated Pt/ZrO2–TiO2–Al2O3 catalysts with different Al2O3 ratios

Jiao, Yi; Liu, Aike; Li, Chunying; Wang, Jianli; Zhu, Quan; Li, Xiangyuan; Chen, Yaoqiang

doi:10.1016/j.jaap.2014.12.002

Cited by 42 publications

(18 citation statements)

References 21 publications

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“…The calibrated value of η was 0.255 during the experiments. The heat sink capacity (Q) was calculated using Equation (7) assuming that the net power consumption was provided to maintain isothermal conditions against the endothermic reaction heat [47].…”

Section: Catalytic Activity Evaluationmentioning

confidence: 99%

“…Specifically, the liquid hydrocarbon fuel used for the hypersonic engine is injected into the channels of a specially designed heat exchanger, and heat control is achieved by absorption of the endothermic heat from cracking and dehydrogenation reactions, as well as by the physical absorption of sensible heat. The gaseous and olefinic products from the cracking reactions are also reported to enhance propulsion efficiency by reducing the ignition delay time [2][3][4][5][6][7], which is another critical issue in hypersonic engines operating under supercritical conditions.…”

Section: Introductionmentioning

confidence: 99%

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Acid/Base-Treated Activated Carbon Catalysts for the Low-Temperature Endothermic Cracking of N-Dodecane with Applications in Hypersonic Vehicle Heat Management Systems

Song

Jeong

et al. 2020

Catalysts

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Hypersonic aircrafts suffer from heat management problems caused by the air friction produced at high speeds. The supercritical catalytic cracking of fuel is endothermic and can be exploited to remove heat from the aircraft surfaces using specially designed heat management systems. Here, we report that an acid/base-treated activated carbon (AC) catalyst shows superior performance to the conventional ZSM-5 catalyst at 4 MPa and 450 °C. Further, under these conditions, coke formation is thermodynamically avoided. Of the prepared catalysts, the AC catalyst treated with NaOH and subsequently with HNO3 (denoted AC-3Na-N) was the most active catalyst, showing the highest selectivity toward light olefins and best heat sink capacity. The acid/base-treated ACs and ZSM-5 catalysts were characterized by scanning transmission electron microscopy, X-ray photoelectron spectroscopy, NH3 temperature-programmed desorption, and Fourier-transform infrared spectroscopy measurements. Characterization reveals the importance of acid strength and density in promoting the cracking reaction pathway to light olefins observed over the acid/base-treated AC catalysts, which show comparable activity at 450 °C to that of the ZSM-5 catalyst operated above 550 °C. The low-temperature activity suppressed coke and aromatic compound (coke precursors) formation. The stability of the acid/base-treated activated carbon catalysts was confirmed over a time-on-stream of 30 min.

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Section: Catalytic Activity Evaluationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Acid/Base-Treated Activated Carbon Catalysts for the Low-Temperature Endothermic Cracking of N-Dodecane with Applications in Hypersonic Vehicle Heat Management Systems

Song

Jeong

et al. 2020

Catalysts

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“…Appropriate catalysts can increase the heat-absorption capacity by improving the selectivity of preferred products (like low-carbon alkenes) and conversion. Based on related literatures, − two kinds of catalysts, including pseudo-homogeneous catalysts − and wall-coated catalysts, − are broadly studied for the EHF cracking reaction.…”

Section: Introductionmentioning

confidence: 99%

“…Wall-coated catalysts are another kind of commonly used catalysts in EHF cracking at present, and the coatings are mainly concentrated in zeolites and composite oxides. − On the one hand, Liu et al, Ji et al., Sang and Li, Konno et al, and Diao et al . all found that ZSM-5 and modified ZSM-5 zeolites had a good catalytic effect on EHF cracking.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a High-Stability Nanosized Pt-Loaded MgAl₂O₄ Catalyst for n-Decane Cracking with Enhanced Activity and Durability

Jiao

Chen

Wang

et al. 2020

Ind. Eng. Chem. Res.

Self Cite

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Catalytic activity and stability, reflected in high conversion, heat sink, and time on stream, are the major concerns of endothermic hydrocarbon fuel cracking. In this work, we synthesized a stable MgAl2O4 spinel support by the co-precipitation method and a Pt/MgAl2O4 catalyst by the liquid-phase reduction-impregnation method (PMA-V) and incipient-wetness impregnation method (PMA). PMA-V showed a better catalytic activity and stability than PMA. Moreover, the heat sink and stability are significantly superior to the Pt-based catalysts in our previous published works. Through a series of catalyst characterization, we found that the high catalytic activity and stability over PMA-V are owing to the “accessible” Pt active sites with better dispersion and a smaller Pt size, which can efficiently alleviate Pt sintering, stronger metal–support interaction, suitable acidity–alkalinity, and a stable MgAl2O4 spinel structure. The valuable information provided in this work provides an effective approach to improve both catalytic activity and stability for hydrocarbon cracking.

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“…Moreover, utilization of locally produced and processed fuels strengthens economy and energy security. ronmental friendly without compromising the performance of the engines [6,7,8]. In the conversion process of biofuel the researchers have identified that the catalytic cracking technique has given the better conversion rate [9,10] and improves both the viscosity of fuel and calorific value of vegetable oils, and would enhance the engine performance and combustion [11,12].…”

Section: Introductionmentioning

confidence: 99%

Impact of catalytically cracked jatropha oil using CeO2 and SiO2 as catalysts on DI diesel engine performance and emission characteristics

Mylswamy¹,

Ramasamy²,

Chidambaram³

et al. 2017

THERM SCI

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The biooil is thermally cracked under catalytic environment in a catalytic cracking process. This process is able to replace the transesterification process to match the biofuel properties with diesel. In this study the silicon dioxide and cerium oxide were chosen as catalyst for cracking the jatropha vegetable oil. The catalytically cracked jatropha biofuel gas is delivered at constant rate to the inlet manifold of the diesel engine. Before and after cracking, the characteristics of the catalysts were analyzed using scanning electron microscope and X-ray diffraction. The condensed cracked jatropha biofuel properties were analyzed with the results of Fourier transform infrared spectroscopy, thermogravimetric analysis, and differential scanning calorimetry analysis, and it matches with the diesel fuel. From the experimental results, the increase in brake thermal efficiency of the engine with higher oxides of nitrogen emission was observed compared with diesel for both the catalytically cracked jatropha biofuels. Notably, SiO 2 as catalyst showed the better mixing towards homogeneity with higher performance and emission results than the CeO 2 as catalyst.

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Catalytic cracking of RP-3 jet fuel over wall-coated Pt/ZrO2–TiO2–Al2O3 catalysts with different Al2O3 ratios

Cited by 42 publications

References 21 publications

Acid/Base-Treated Activated Carbon Catalysts for the Low-Temperature Endothermic Cracking of N-Dodecane with Applications in Hypersonic Vehicle Heat Management Systems

Acid/Base-Treated Activated Carbon Catalysts for the Low-Temperature Endothermic Cracking of N-Dodecane with Applications in Hypersonic Vehicle Heat Management Systems

Synthesis of a High-Stability Nanosized Pt-Loaded MgAl₂O₄ Catalyst for n-Decane Cracking with Enhanced Activity and Durability

Impact of catalytically cracked jatropha oil using CeO2 and SiO2 as catalysts on DI diesel engine performance and emission characteristics

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Catalytic cracking of RP-3 jet fuel over wall-coated Pt/ZrO2–TiO2–Al2O3 catalysts with different Al2O3 ratios

Cited by 42 publications

References 21 publications

Acid/Base-Treated Activated Carbon Catalysts for the Low-Temperature Endothermic Cracking of N-Dodecane with Applications in Hypersonic Vehicle Heat Management Systems

Acid/Base-Treated Activated Carbon Catalysts for the Low-Temperature Endothermic Cracking of N-Dodecane with Applications in Hypersonic Vehicle Heat Management Systems

Synthesis of a High-Stability Nanosized Pt-Loaded MgAl2O4 Catalyst for n-Decane Cracking with Enhanced Activity and Durability

Impact of catalytically cracked jatropha oil using CeO2 and SiO2 as catalysts on DI diesel engine performance and emission characteristics

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Synthesis of a High-Stability Nanosized Pt-Loaded MgAl₂O₄ Catalyst for n-Decane Cracking with Enhanced Activity and Durability