Highly efficient conversion of terpenoid biomass to jet-fuel range cycloalkanes in a biphasic tandem catalytic process

2017 ◽  
Vol 19 (15) ◽  
pp. 3566-3573 ◽  
Author(s):  
Xiaokun Yang ◽  
Teng Li ◽  
Kan Tang ◽  
Xinpei Zhou ◽  
Mi Lu ◽  
...  
Keyword(s):  
Jet Fuel ◽  
Catalytic Process ◽  
Jet Fuels ◽  
High Carbon ◽  
Carbon Efficiency ◽  
Efficient Conversion ◽  
Highly Efficient

A novel efficient biphasic tandem catalytic process (biTCP) with a high carbon efficiency was developed for synthesizing cycloalkanes that can used to make dense jet fuels from renewable terpenoid biomass (such as 1,8-cineole).

One-pot production of jet fuels from fatty acids and vegetable oils in biphasic tandem catalytic process

Fuel ◽  
2021 ◽  
pp. 121060
Author(s):  
Chuhua Jia ◽  
Cheng Zhang ◽  
Shaoqu Xie ◽  
Wanli Zhang ◽  
Ziling Wang ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Vegetable Oils ◽  
Catalytic Process ◽  
Jet Fuels ◽  
One Pot

A Highly Efficient Conversion of Primary or Secondary Alcohols into Fluorides with n-Perfluorobutanesulfonyl Fluoride-Tetrabutylammonium Triphenyldifluorosilicate

Synlett ◽  
2009 ◽  
Vol 2009 (05) ◽  
pp. 779-782 ◽  
Author(s):  
Xueqing Zhao ◽  
Xiaowen Xue ◽  
Weiping Zhuang ◽  
Dongsheng Fang ◽  
Jingming Zhou
Keyword(s):  
Secondary Alcohols ◽  
Efficient Conversion ◽  
Highly Efficient

Ignition Characteristics of a Fischer-Tropsch Synthetic Jet Fuel

2008 ◽  
Author(s):  
P. Gokulakrishnan ◽  
M. S. Klassen ◽  
R. J. Roby
Keyword(s):  
Kinetic Model ◽  
Ignition Delay ◽  
Flow Reactor ◽  
Kinetic Mechanism ◽  
Jet Fuel ◽  
Synthetic Jet ◽  
Jet Fuels ◽  
Ignition Delay Times ◽  
Delay Times ◽  
Ignition Characteristics

Ignition delay times of a “real” synthetic jet fuel (S8) were measured using an atmospheric pressure flow reactor facility. Experiments were performed between 900 K and 1200 K at equivalence ratios from 0.5 to 1.5. Ignition delay time measurements were also performed with JP8 fuel for comparison. Liquid fuel was prevaporized to gaseous form in a preheated nitrogen environment before mixing with air in the premixing section, located at the entrance to the test section of the flow reactor. The experimental data show shorter ignition delay times for S8 fuel than for JP8 due to the absence of aromatic components in S8 fuel. However, the ignition delay time measurements indicate higher overall activation energy for S8 fuel than for JP8. A detailed surrogate kinetic model for S8 was developed by validating against the ignition delay times obtained in the present work. The chemical composition of S8 used in the experiments consisted of 99.7 vol% paraffins of which approximately 80 vol% was iso-paraffins and 20% n-paraffins. The detailed kinetic mechanism developed in the current work included n-decane and iso-octane as the surrogate components to model ignition characteristics of synthetic jet fuels. The detailed surrogate kinetic model has approximately 700 species and 2000 reactions. This kinetic mechanism represents a five-component surrogate mixture to model generic kerosene-type jets fuels, namely, n-decane (for n-paraffins), iso-octane (for iso-paraffins), n-propylcyclohexane (for naphthenes), n-propylbenzene (for aromatics) and decene (for olefins). The sensitivity of iso-paraffins on jet fuel ignition delay times was investigated using the detailed kinetic model. The amount of iso-paraffins present in the jet fuel has little effect on the ignition delay times in the high temperature oxidation regime. However, the presence of iso-paraffins in synthetic jet fuels can increase the ignition delay times by two orders of magnitude in the negative temperature (NTC) region between 700 K and 900 K, typical gas turbine conditions. This feature can have a favorable impact on preventing flashback caused by the premature autoignition of liquid fuels in lean premixed prevaporized (LPP) combustion systems.

Characterization of Fuel Composition and Altitude Impact on Gaseous and Particle Emissions From a Turbojet Engine

2017 ◽  
Author(s):  
Tak W. Chan ◽  
Pervez Canteenwalla ◽  
Wajid A. Chishty
Keyword(s):  
Co2 Emissions ◽  
Nox Reduction ◽  
Cetane Number ◽  
Combustion Efficiency ◽  
Jet Fuel ◽  
Jet Fuels ◽  
Fuel Composition ◽  
Worst Case ◽  
Particle Emissions ◽  
Turbojet Engine

The effects of altitude and fuel composition on gaseous and particle emissions from a turbojet engine were investigated as part of the National Jet Fuels Combustion Program (NJFCP) effort. Two conventional petroleum based jet fuels (a “nominal” and a “worst-case” jet fuel) and two test fuels with unique characteristics were selected for this study. The “worst-case” conventional jet fuel with high flash point and viscosity resulted in reduced combustion efficiency supported by the reduced CO2 emissions and corresponding increased CO and THC emissions. In addition, increased particle number (PN), particle mass (PM), and black carbon (BC) emissions were observed. Operating the engine on a bimodal fuel, composed of heavily branched C12 and C16 iso-paraffinic hydrocarbons with an extremely low cetane number did not significantly impact the engine performance or gaseous emissions but significantly reduced PN, PM, and BC emissions when compared to other fuels. The higher aromatic content and lower hydrogen content in the C-5 fuel were observed to increase PN, PM, and BC emissions. It is also evident that the type of aromatic hydrocarbons has a large impact on BC emissions. Reduction in combustion efficiency resulted in reduced CO2 emissions and increased CO and THC emissions from this engine with increasing altitudes. PN emissions were moderately influenced by altitude but PM and BC emissions were significantly reduced with increasing altitude. The reduced BC emissions with increasing altitude could be a result of reduced combustion temperature which lowered the rate of pyrolysis for BC formation, which is supported by the NOx reduction trend.

scholarly journals Production Cost and Carbon Footprint of Biomass-Derived Dimethylcyclooctane as a High Performance Jet Fuel Blendstock

2021 ◽  
Author(s):  
Nawa Raj Baral ◽  
Minliang Yang ◽  
Benjamin G. Harvey ◽  
Blake A Simmons ◽  
Aindrila Mukhopadhyay ◽  
...  
Keyword(s):  
Production Cost ◽  
High Performance ◽  
Jet Fuel ◽  
Liquid Fuels ◽  
Jet Fuels ◽  
Selling Price ◽  
Low Carbon ◽  
Hydrogenation Catalysts ◽  
Raney Nickel Catalyst ◽  
Biomass Sorghum

<div> <div> <div> <p>Near-term decarbonization of aviation requires energy-dense, renewable liquid fuels. Biomass- derived 1,4-dimethylcyclooctane (DMCO), a cyclic alkane with a volumetric net heat of combustion up to 9.2% higher than Jet-A, has the potential to serve as a low-carbon, high- performance jet fuel blendstock that may enable paraffinic bio-jet fuels to operate without aromatic compounds. DMCO can be produced from bio-derived isoprenol (3-methyl-3-buten-1- ol) through a multi-step upgrading process. This study presents detailed process configurations for DMCO production to estimate the minimum selling price and life-cycle greenhouse gas (GHG) footprint considering three different hydrogenation catalysts and two bioconversion pathways. The platinum-based catalyst offers the lowest production cost and GHG footprint of $9.0/L-Jet-Aeq and 61.4 gCO2e/MJ, given the current state of technology. However, when the conversion process is optimized, hydrogenation with a Raney nickel catalyst is preferable, resulting in a $1.5/L-Jet-Aeq cost and 18.3 gCO2e/MJ GHG footprint if biomass sorghum is the feedstock. This price point requires dramatic improvements, including 28 metric-ton/ha sorghum yield and 95-98% of the theoretical maximum conversion of biomass-to-sugars, sugars-to-isoprenol, isoprenol-to-isoprene, and isoprene-to-DMCO. Because increased gravimetric energy density of jet fuels translates to reduced aircraft weight, DMCO also has the potential to improve aircraft efficiency, particularly on long-haul flights. </p> </div> </div> </div>

Highly efficient conversion of polysialoganglioside to GM1 withBrevibacterium caseias a microbial biocatalyst

2005 ◽  
Vol 23 (1) ◽  
pp. 29-32 ◽  
Author(s):  
Xuedong Wang ◽  
Zhe Yin ◽  
Yanfeng Peng ◽  
Yaling Shen ◽  
Dongzhi Wei
Keyword(s):  
Efficient Conversion ◽  
Highly Efficient

Highly Efficient Conversion of Propargylic Amines and CO 2 Catalyzed by Noble‐Metal‐Free [Zn 116 ] Nanocages

2020 ◽  
Vol 59 (22) ◽  
pp. 8586-8593 ◽  
Author(s):  
Chun‐Shuai Cao ◽  
Shu‐Mei Xia ◽  
Zhen‐Jun Song ◽  
Hang Xu ◽  
Ying Shi ◽  
...  
Keyword(s):  
Noble Metal ◽  
Metal Free ◽  
Efficient Conversion ◽  
Highly Efficient

Ruthenium Complexes Immobilized on an Azolium Based Metal Organic Framework for Highly Efficient Conversion of CO2 into Formic Acid

ChemCatChem ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 1256-1263 ◽  
Author(s):  
Chao Wu ◽  
Faisal Irshad ◽  
Maowei Luo ◽  
Yujun Zhao ◽  
Xinbin Ma ◽  
...  
Keyword(s):  
Formic Acid ◽  
Metal Organic Framework ◽  
Ruthenium Complexes ◽  
Efficient Conversion ◽  
Highly Efficient ◽  
Metal Organic ◽  
Organic Framework

Highly efficient conversion of waste plastic into thin carbon nanosheets for superior capacitive energy storage

Carbon ◽  
2021 ◽  
Vol 171 ◽  
pp. 819-828 ◽  
Author(s):  
Xiaoguang Liu ◽  
Changde Ma ◽  
Yanliang Wen ◽  
Xuecheng Chen ◽  
Xi Zhao ◽  
...  
Keyword(s):  
Energy Storage ◽  
Capacitive Energy Storage ◽  
Waste Plastic ◽  
Carbon Nanosheets ◽  
Efficient Conversion ◽  
Highly Efficient ◽  
Thin Carbon

Polysulfide Confinement and Highly Efficient Conversion on Hierarchical Mesoporous Carbon Nanosheets for Li–S Batteries

2019 ◽  
Vol 9 (42) ◽  
pp. 1901935 ◽  
Author(s):  
Jianbo Li ◽  
Chunyuan Chen ◽  
Yuwei Chen ◽  
Zhenhua Li ◽  
Wenfu Xie ◽  
...  
Keyword(s):  
Mesoporous Carbon ◽  
Carbon Nanosheets ◽  
Efficient Conversion ◽  
Highly Efficient
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