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

Sun, Wenjuan; Liu, Guozhu; Wang, Li; Zhang, Xiangwen

doi:10.1016/j.fuel.2014.12.022

Cited by 36 publications

(14 citation statements)

References 42 publications

(40 reference statements)

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“…For advanced propulsion applications, the dispersion of nanocatalysts such as nanozeolites − and metal nanoparticles , within liquid hydrocarbons has also received considerable attention as a means to improve heat sink capacity and conversion rates under supercritical conditions. Unfortunately, metal nanoparticles by themselves coarsen and lose their effectiveness at elevated temperatures and pressures.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Fuel Decomposition in the Presence of Colloidal Functionalized Graphene Sheet-Supported Platinum Nanoparticles

Sim

Yetter

Hong

et al. 2020

ACS Appl. Energy Mater.

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Experiments and simulations were used to demonstrate that decorating functionalized graphene sheets (FGSs) with platinum nanoparticles (Pt@FGS) stabilized these particles. Addition of these particles to liquid hydrocarbon fuels was observed to significantly affect decomposition under supercritical conditions at a pressure of 4.75 MPa and temperatures from 753 to 803 K. The suspension of only 50 ppmw Pt@FGS in the fuel (equivalent to adding 10 ppmw Pt) enhanced fuel conversion rates (by up to 24%) with a major effect on specific product yields. The production of lowmolecular-weight species increased in the pyrolysis products (with the hydrogen yield increasing by a factor of 12.5). ReaxFF molecular dynamics (MD) simulations supported a mechanism in which synergy between Pt and FGS catalyzed dehydrogenation during n-C 12 H 26 pyrolysis. The highest conversion rates and greatest yields of hydrogen and low-molecular-weight species were observed for fuels containing Pt@FGS particles rather than those containing either FGSs or Pt-clusters alone. Analysis of the platinum decorated FGSs post reaction indicated no deterioration of the composite particles.

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Section: Introductionmentioning

confidence: 99%

Enhanced Fuel Decomposition in the Presence of Colloidal Functionalized Graphene Sheet-Supported Platinum Nanoparticles

Sim

Yetter

Hong

et al. 2020

ACS Appl. Energy Mater.

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“…Trimethylchlorosilane-modified HZSM-5 (H-type Zeolite Socony Mobil-type 5) nanocrystals achieved low homogeneous catalytic cracking of hydrocarbon fuels . Sun et al further improved the dispersibility and catalytic performance of molecular sieves . Constrained by structures and active sites, the stability of molecular sieves is far from satisfactory and can remain stable only for several weeks.…”

Section: Introductionmentioning

confidence: 99%

“…18 Sun et al further improved the dispersibility and catalytic performance of molecular sieves. 24 Constrained by structures and active sites, the stability of molecular sieves is far from satisfactory and can remain stable only for several weeks. Ni and Ni−B nanoparticles 25,26 as well as gold nanoparticles protected through Gemini surfactants prepared by Li et al exhibited good stability and cracking catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

New Strategy for High-Performance Integrated Catalysts for Cracking Hydrocarbon Fuels

Zhao

Bai

et al. 2019

ACS Appl. Mater. Interfaces

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In this study, we described the synthesis, characterization, and application of hyperbranched polymer-encapsulated metal nanoparticles (HEMNs) as integrated catalysts for the supercritical cracking of hydrocarbon fuels. The metal precursor was extracted into the organic phase using a hydrocarbon-soluble hyperbranched poly(amidoamine) (CPAMAM) and then reduced in situ by NaBH4 to produce HEMNs with virtually a single-size distribution. The monitoring of the preparation process by UV–vis demonstrated the feasibility of this encapsulation approach, and the successful synthesis of three different types of HEMNs, metal (Pd, Pt, Au)@CPAMAM, reflected the universality of this method. Compared with the existing catalyst octadecylamine-stabilized Pd nanoparticle, Pd@18N, HEMNs were superior in every aspect. The new encapsulation method allowed metal NPs to have a smaller particle size beneficial to their overall specific surface area and a higher proportion of active surface atoms for a better catalytic activity. Moreover, the space-limiting effect of the polymer allowed the three HEMNs to be highly dispersed in decalin and exhibited admirable stability under storage tests for up to 12 months and high-temperature stability tests at 180 °C. During the supercritical cracking of decalin, Pd@CPAMAM possessed a much better catalytic performance than Pd@18N and CPAMAM (which can also be used as a macroinitiator). To obtain the same heat sink of 3.02 MJ/kg, the temperature could be lowered from 725 to 701, 693, and 699 °C for Pd, Pt, and Au HEMNs, respectively. Pt HEMN turned out to be the best due to its excellent catalytic dehydrogenation/cracking performance, with the conversion of decalin increasing from 22.3 to 50.7% and the heat sink rising from 2.18 to 2.62 MJ/kg with the existence of 50 ppm Pt@CPAMAM, at 675 °C. The significant enhancements were ascribed to the synergistic catalysis through the remarkable abilities of nanometals to catalyze dehydrogenation/cracking of fuel, the supercritical stabilization effects from CPAMAM, and the initiation effects of the hyperbranched polymer CPAMAM.

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“…Typically, fumed silica (SiO 2 ) solution (n SiO 2 : n TEAOH ¼ 5 : 1) and aluminum in TEAOH solution (n Al : n TEAOH ¼ 1 : 3) were mixed on the scale of 35 to 1, according to our previous research. 27,28 The synthesis solution was pre-crystallization in sealed autoclave at 115 C for one day. The obtained intermediate was denoted as pro-zeolitic seeds.…”

Section: Catalyst Preparationmentioning

confidence: 99%

Fabrication of Pd₃@Beta for catalytic combustion of VOCs by efficient Pd₃ cluster and seed-directed hydrothermal syntheses

Sun

Yang

et al. 2020

RSC Adv.

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

Cited by 36 publications

References 42 publications

Enhanced Fuel Decomposition in the Presence of Colloidal Functionalized Graphene Sheet-Supported Platinum Nanoparticles

Enhanced Fuel Decomposition in the Presence of Colloidal Functionalized Graphene Sheet-Supported Platinum Nanoparticles

New Strategy for High-Performance Integrated Catalysts for Cracking Hydrocarbon Fuels

Fabrication of Pd₃@Beta for catalytic combustion of VOCs by efficient Pd₃ cluster and seed-directed hydrothermal syntheses

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

Cited by 36 publications

References 42 publications

Enhanced Fuel Decomposition in the Presence of Colloidal Functionalized Graphene Sheet-Supported Platinum Nanoparticles

Enhanced Fuel Decomposition in the Presence of Colloidal Functionalized Graphene Sheet-Supported Platinum Nanoparticles

New Strategy for High-Performance Integrated Catalysts for Cracking Hydrocarbon Fuels

Fabrication of Pd3@Beta for catalytic combustion of VOCs by efficient Pd3 cluster and seed-directed hydrothermal syntheses

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Fabrication of Pd₃@Beta for catalytic combustion of VOCs by efficient Pd₃ cluster and seed-directed hydrothermal syntheses