FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2146373752> ?p ?o ?g. }

• W2146373752 abstract "By new experimental studies on hydrocarbon oxidation, taken in conjunction with results already available, an attempt is made to form a systematic picture of the following phenomena. ( a ) The complex dependence of rate upon hydrocarbon and oxygen pressures: this varies in a complicated way from substance to substance and with the experimental conditions. In the region of relatively low temperature, if the maximum rate is set approximately proportional to [ R H] x [O 2 ] y , x varies from 3 to 1 and y from + 1 to — 1. An inverse correlation between x and y is shown over a range of combustible substances. ( b ) The highly characteristic form of the temperature dependence: there are often regions where the rate falls as the temperature increases. ( c ) The way in which the reaction orders change with temperature: the x and y of the above equation may rise above the values given when the temperature is increased. After fairly sharp maxima they fall again as the tem perature is further increased. ( d ) The reactant concentration dependences of π, the ratio of reaction rate to peroxide concentration: this varies with rather less than the first power of [ R H] and with a small negative power of [O 2 ]. ( e ) The reactant concentration dependences of t *, the time to the attainment of the maximum rate : this increases with [ R H] and decreases with [O 2 ]. These phenomena can be correlated in term s of a reaction m echanism based on a combination of simple and well-documented steps: (1) R H + O 2 → R ' + HO' 2 , (2) R ' + O 2 → R O' 2 , ( 3 ) R O' 2 + O 2 → end of chain, (3') R O' 2 → end of chain, (4) R O' 2 + R H → R OOH + R ', (5) R OOH → α R ', (6) R OOH → end of chain, (7) R ' + O 2 → end of chain, (7') R → end of chain. With the assumption of the attainment of stationary states and with the introduction of certain approximations, the scheme leads to the following general expression for the maximum rate of reaction : <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML overflow=scroll> <mml:msub> <mml:mi>ρ</mml:mi> <mml:mrow> <mml:mo movablelimits=true>max</mml:mo> <mml:mo>.</mml:mo> </mml:mrow> </mml:msub> <mml:mspace width=thinmathspace /> <mml:mo>=</mml:mo> <mml:mspace width=thinmathspace /> <mml:mstyle> <mml:mrow> <mml:mfrac> <mml:mrow> <mml:msub> <mml:mi>C</mml:mi> <mml:mn>1</mml:mn> </mml:msub> <mml:msup> <mml:mrow> <mml:mo stretchy=false>[</mml:mo> <mml:mi>R</mml:mi> <mml:mrow> <mml:mi mathvariant=normal>H</mml:mi> <mml:mo stretchy=false>]</mml:mo> </mml:mrow> </mml:mrow> <mml:mn>3</mml:mn> </mml:msup> <mml:mo stretchy=false>[</mml:mo> <mml:msub> <mml:mrow> <mml:mi mathvariant=normal>O</mml:mi> </mml:mrow> <mml:mn>2</mml:mn> </mml:msub> <mml:mo stretchy=false>]</mml:mo> </mml:mrow> <mml:mrow> <mml:mi>ω</mml:mi> <mml:mrow> <mml:mo stretchy=false>(</mml:mo> </mml:mrow> <mml:mi>ω</mml:mi> <mml:mo>−</mml:mo> <mml:msub> <mml:mi>C</mml:mi> <mml:mn>2</mml:mn> </mml:msub> <mml:mo stretchy=false>[</mml:mo> <mml:mi>R</mml:mi> <mml:mrow> <mml:mi mathvariant=normal>H</mml:mi> <mml:mo stretchy=false>]</mml:mo> <mml:mo stretchy=false>)</mml:mo> </mml:mrow> </mml:mrow> </mml:mfrac> </mml:mrow> </mml:mstyle> </mml:math> where w = a + b [O 2 ] + c [ R H] + a '/[O 2 ] + b ' + c '[ R H]/[O 2 ] and [ R H] and [O 2 ] refer to reactant concentrations, a, a', b, b', c, c', C 1 and C 2 are composite rate constants. According to the relative values of the constants the most diverse types of behaviour appear as special cases covered by the general expression. Thus the apparently contrasting results of much published work can be understood. At lower temperatures (e.g. 280 °C) the phenomena can be mostly explained by the retention in the denominator of only those terms including a, b and c . With increasing temperature the relative influence of the terms in C 2 and a ' must be assumed to increase in order to account for the increase in reaction orders referred to under ( c ). With still further increase in temperature the fall-off in reaction orders and rate must be attributed to the eventual emergence in the denominator of a concentration-independent term as the dominant one. This is probably associated with a predominant importance of process 3'. When this spontaneous destruction of peroxy radicals goes far enough, the 'low temperature' reaction is snuffed out and the field is left clear for the ‘high temperature’ reaction." @default.
• W2146373752 created "2016-06-24" @default.
• W2146373752 creator A5033359230 @default.
• W2146373752 creator A5058297345 @default.
• W2146373752 date "1963-12-03" @default.
• W2146373752 modified "2023-09-27" @default.
• W2146373752 title "Some correlations in the kinetics of gas-phase hydrocarbon oxidations" @default.
• W2146373752 cites W1978831600 @default.
• W2146373752 cites W2015670226 @default.
• W2146373752 cites W2053863196 @default.
• W2146373752 cites W2176763348 @default.
• W2146373752 cites W2335148766 @default.
• W2146373752 doi "https://doi.org/10.1098/rspa.1963.0209" @default.
• W2146373752 hasPublicationYear "1963" @default.
• W2146373752 type Work @default.
• W2146373752 sameAs 2146373752 @default.
• W2146373752 citedByCount "7" @default.
• W2146373752 countsByYear W21463737522012 @default.
• W2146373752 crossrefType "journal-article" @default.
• W2146373752 hasAuthorship W2146373752A5033359230 @default.
• W2146373752 hasAuthorship W2146373752A5058297345 @default.
• W2146373752 hasConcept C113196181 @default.
• W2146373752 hasConcept C121332964 @default.
• W2146373752 hasConcept C142362112 @default.
• W2146373752 hasConcept C147789679 @default.
• W2146373752 hasConcept C148898269 @default.
• W2146373752 hasConcept C161790260 @default.
• W2146373752 hasConcept C175113610 @default.
• W2146373752 hasConcept C178790620 @default.
• W2146373752 hasConcept C185592680 @default.
• W2146373752 hasConcept C207467116 @default.
• W2146373752 hasConcept C2524010 @default.
• W2146373752 hasConcept C2777207669 @default.
• W2146373752 hasConcept C2781048764 @default.
• W2146373752 hasConcept C33923547 @default.
• W2146373752 hasConcept C39353612 @default.
• W2146373752 hasConcept C44280652 @default.
• W2146373752 hasConcept C52119013 @default.
• W2146373752 hasConcept C554144382 @default.
• W2146373752 hasConcept C62520636 @default.
• W2146373752 hasConcept C91528185 @default.
• W2146373752 hasConcept C97355855 @default.
• W2146373752 hasConceptScore W2146373752C113196181 @default.
• W2146373752 hasConceptScore W2146373752C121332964 @default.
• W2146373752 hasConceptScore W2146373752C142362112 @default.
• W2146373752 hasConceptScore W2146373752C147789679 @default.
• W2146373752 hasConceptScore W2146373752C148898269 @default.
• W2146373752 hasConceptScore W2146373752C161790260 @default.
• W2146373752 hasConceptScore W2146373752C175113610 @default.
• W2146373752 hasConceptScore W2146373752C178790620 @default.
• W2146373752 hasConceptScore W2146373752C185592680 @default.
• W2146373752 hasConceptScore W2146373752C207467116 @default.
• W2146373752 hasConceptScore W2146373752C2524010 @default.
• W2146373752 hasConceptScore W2146373752C2777207669 @default.
• W2146373752 hasConceptScore W2146373752C2781048764 @default.
• W2146373752 hasConceptScore W2146373752C33923547 @default.
• W2146373752 hasConceptScore W2146373752C39353612 @default.
• W2146373752 hasConceptScore W2146373752C44280652 @default.
• W2146373752 hasConceptScore W2146373752C52119013 @default.
• W2146373752 hasConceptScore W2146373752C554144382 @default.
• W2146373752 hasConceptScore W2146373752C62520636 @default.
• W2146373752 hasConceptScore W2146373752C91528185 @default.
• W2146373752 hasConceptScore W2146373752C97355855 @default.
• W2146373752 hasLocation W21463737521 @default.
• W2146373752 hasOpenAccess W2146373752 @default.
• W2146373752 hasPrimaryLocation W21463737521 @default.
• W2146373752 isParatext "false" @default.
• W2146373752 isRetracted "false" @default.
• W2146373752 magId "2146373752" @default.
• W2146373752 workType "article" @default.