Results 121 to 130 of about 37,808 (300)
Effect of silica fume additions on the hydration behaviour of calcium aluminates [PDF]
, 1997 In the recent refractory castables technology, the calcium aluminate cement is being replaced in increasing proportion by very fine matrix components, such as silica fume and colloidal alumina.
Fumo, Daniel A., Segadães, Ana M.
core +1 more source
Characterization of paraffin-based fuels and paraffin waxes for hybrid rocket engines
, 2015 This thesis develops an investigation on the rheological and mechanical properties of a class of paraffin-based fuels for hybrid rocket engines. They are obtained by mixing a paraffin wax and a polymer (SEBS, EVA and PE). Mixtures have a content of polymer equal to a 2,5%, 5%, 7,5% and 10%.
openaire +2 more sources
Alkali‐Metal Base Catalyzed Electrocyclization of Isoprene Derivatives
Chemistry – A European Journal, EarlyView.Simple and abundant alkali‐metal base catalysis in combination with Lewis basic polyamines enables the electrocyclization of isoprene‐derived trienes to cycloheptadienes under neat conditions. Mechanistic insight supported by DFT guides a scalable route to seven‐membered carbocycles which, after reduction, give saturated cycloalkanes relevant as ...
Mikaël Le Roch +3 more
wiley +1 more source
Литьë и металлургия, 2015 Quantitative and qualitative composition of the gas emission has been investigated. Quantity of CO, СО2, NOx, О2, paraffin hydrocarbons and benzene derivatives in the reaction zone depending on the duration of the process and temperature 400–800 ºС has ...
A. S. Panasugin +3 more
doaj
InventionsThe use of depressant additives is the most effective and cost-effective way to improve the low-temperature properties of diesel fuels, like the cloud point, cold filter plugging point and pour point.
Yana Morozova +4 more
doaj +1 more source
How Best to Target the Poor? An operational targeting of the poor using indicator-based proxy means tests [PDF]
This paper seeks to answer an operational development question: how best to target the poor? In their endeavor, policy makers, program managers, and development practitioners face the daily challenge of targeting policies, projects, and services at the ...
Alcaraz V., Gabriela +4 more
core +1 more source
The Canadian Journal of Chemical Engineering, EarlyView.Abstract Synthetic jet fuel containing non‐petroleum‐derived kerosene can be produced from synthetic kerosene obtained through processes that include a hydroprocessing step. The potential use of non‐sulphided (reduced) nickel supported on alumina (Ni/Al2O3) was evaluated as an alternative to sulphided catalysts to saturate alkenes in sulphur‐free ...
Garima Chauhan +3 more
wiley +1 more source
The Canadian Journal of Chemical Engineering, EarlyView.Abstract Acid catalyzed conversion of durene by isomerization, disproportionation, and transalkylation is of interest to the development of a methanol‐to‐jet process to reduce the amount of durene in the kerosene. It was of interest to determine whether durene conversion could be performed at a temperature lower than 350°C.
Aida G. Velasco Ortiz +2 more
wiley +1 more source
AerospaceThis study investigated combustion characteristics of composite fuel grains designed based on a modular fuel unit strategy. The modular fuel unit comprised a periodical helical structure with nine acrylonitrile–butadiene–styrene helical blades.
Junjie Pan +6 more
doaj +1 more source