Shell Oil Comapny

Shell Usa, Inc.

Shell Internationale Research Maatschappij, B.v.

Roger Francis Cracknell

Mark Lawrence Brewer

John Socrates Thomaides

Joseph M Russo

Michael Timothy Philbin

Qiwei He

Damien Christian Vadillo

John M Morales

Philip Nigel Threlfall-Holmes

Nicholas James Rounthwaite

Andrea Schuetze

Tor Kit Goh

Richard John Price

Marcello Stefano Rigutto

Eric Johannes Vos

Trevor James Davies

Gert Jan Kramer

Gautam Tavanappa Kalghatgi

Mark Clift Southby

Aldo Caiazzo

Trevor Stephenson

Eri Ito

Arjun Prakash

Matthias Mundt

Allen Ambwere Aradi

Renate Uitz-Choi

Neal Matthew Morgan

Artemis Kontou

Andreas Kolbeck

Yajnanarayana Jois

Abhishek Kar

Method for reducing intake valve deposits in a spark ignition internal combustion engine which is fuelled with a gasoline fuel composition, wherein the method comprises introducing into the engine an aqueous based composition, wherein the aqueous based composition comprises (i) water, (ii) from 0 vol % to 40 vol % freezing point suppression agent, (iii) from 0 vol % to 10 vol % of surfactant, and (iv) an amine compound in a blending amount of from 0 ppmw to 1000 ppmw.

Method for reducing intake valve deposits

Use of a liquid fuel composition in an internal combustion engine, the internal combustion engine containing a lubricating composition for lubricating said internal combustion engine, wherein the liquid fuel composition comprises at least one nitrogen-containing detergent additive, for the purpose of reducing engine wear caused by the presence of soot in the lubricating composition.

Liquid fuel compositions

A fuel composition for powering a combustion engine, the composition comprising: a liquid base fuel; and a (co)polymer obtainable by (co)polymerizing at least the following monomers: &#x2022;at least one bicyclic (meth)acrylate ester &#x2022;optionally at least one lower-alkyl (meth)acrylate, &#x2022;optionally at least one aromatic vinyl monomer, and &#x2022;optionally other ethylenically unsaturated monomers.

Fuel composition

Process for preparing a diesel fuel composition comprising the steps of:

Process for preparing a diesel fuel composition

A fuel composition for powering a combustion engine the composition comprising: a liquid base fuel; and a copolymer obtainable by copolymerizing at least the following monomers: &#x2014;at least one bicyclic (meth)acrylate ester; &#x2014;at least one fatty-alkyl (meth)acrylate; &#x2014;optionally, and preferably, at least one aromatic vinyl monomer; and &#x2014;optionally other ethylenically unsaturated monomers.

Additive composition for use in a fuel or lubricant formulation, comprising an active substance in an inclusion complex with a modified cyclodextrin of formula (I): wherein n is an integer from 6 to 20, and R, Rand Rare each independently selected from hydrogen, optionally substituted alkyl, optionally substituted aryl and carbonyl, provided that R, Rand Rare not all hydrogen. Also provided is a fuel or lubricant formulation comprising the additive composition, a premix for use in preparing the additive composition, and the use of a modified cyclodextrin (I) as a vehicle for an active substance in an additive composition or in a fuel or lubricant formulation.

Compositions

An additive composition for use in a diesel fuel formulation, comprising a cetane improver in an inclusion complex with a modified cyclodextrin of formula (I): wherein n is an integer from 6 to 20, and R, Rand Rare each independently selected from hydrogen, optionally substituted alkyl, optionally substituted aryl and carbonyl, provided that R, Rand Rare not all hydrogen. Also provided is a diesel fuel formulation comprising the additive composition, and the use of a modified cyclodextrin (I) as a vehicle for a cetane improver in an additive composition or diesel fuel formulation.

Gasoline fuel formulation having a laminar burning velocity Swhich is equal to or below that of isooctane at a pressure of 1 bar, a temperature of 300 K and stoichiometric air/fuel mixture strength. The formulation can be used to reduce pre-ignition in a turbocharged spark ignition engine, in particular when operating with an inlet pressure above 1.5 bar absolute. The formulation can thus also be used to reduce engine damage. The invention also provides a method of preparing a gasoline fuel, by mixing gasoline fuel components to achieve a laminar burning velocity Sfor the resultant mixture which is equal to or below that of isooctane at a pressure of 1 bar, a temperature of 300 K and stoichiometric air/fuel mixture strength. It further provides a method for selecting a gasoline fuel for use in a turbocharged spark ignition engine, based on its laminar burning velocity S.

Fuel formulations

A process for operating a compression ignition internal combustion engine in combination with a catalytic partial oxidation reformer and, optionally, an exhaust gas aftertreater, wherein:

Process for operating a compression ignition internal combustion engine in combination with a catalytic reformer

A process for operating a marine engine () in combination with a catalytic partial oxidation reformer () and, optionally, an exhaust gas aftertreater (), wherein: (a) a mixture of a first fuel and air, is introduced in the combustion chamber of the engine (); (b) exhaust gas is discharged from the engine and optionally partly recirculated to the combustion chamber of the engine (); (c) a second fuel and oxygen and/or steam are supplied to the catalytic partial oxidation reformer () to produce synthesis gas, wherein the second fuel comprises Fischer-Tropsch derived fuel; (d) at least part of the synthesis gas is supplied to: (i) the exhaust gas aftertreater (); (ii) the combustion chamber of the engine (); or to both.

Reforming of GTL for marine applications

Use of a Fischer-Tropsch derived fuel in a fuel composition is disclosed, for the purpose of reducing catalyst degradation in a catalytically driven or catalyst containing system which is running on, or is to be run on, the composition or its products, wherein the Fischer-Tropsch derived fuel is used to reduce the level of silicon in the fuel composition, such as by reducing the concentration of silicon-containing antifoaming additive(s) in the fuel composition. It may also be used to reduce loss of efficiency of fuel atomization and/or combustion, and/or to reduce build up of silicon deposits, in a fuel consuming system which is running on, or is to be run on, the fuel composition.

Fuel compositions

A gasoline composition is provided containing a hydrocarbon base fuel containing 5 to 20% v olefins, not greater than 5% v olefins of at least 10 carbon atoms, not greater than 5% v aromatics of at least 10 carbon atoms, initial boiling point in the range 24 to 45&#xb0; C., Tin the range 38 to 60&#xb0; C., Tin the range 77 to 110&#xb0; C., Tin the range 130 to 190&#xb0; C. and final boiling point not greater than 220&#xb0; C. A method of operating an automobile using such gasoline composition as fuel is provided. Use of such gasoline composition as fuel provides improved stability of engine lubricant with reduced frequency of engine oil changes.

Gasoline composition

A process for controlling the performance of a homogeneous charge compression (HCCI) engine in a vehicle having a hydrocarbon fuel reservoir which process is provided. The octane or cetane number of hydrocarbon fuel being supplied to the HCCI engine is adjusted by: (a) converting a portion of hydrocarbon fuel from the hydrocarbon fuel reservoir to synthesis gas; (b) converting synthesis gas produced in step (a) to a mixture of hydrocarbons having an octane number less than or a cetane number higher than that of the hydrocarbon fuel of the hydrocarbon fuel reservoir using a Fischer Tropsch process; (c) delivering (i) a portion of hydrocarbon fuel from the hydrocarbon fuel reservoir and (ii) a portion of the mixture of hydrocarbons produced in step (b) to the HCCI engine; and (d) varying the amounts of (i) and (ii) in step (c) in order to adjust the octane or cetane number of the hydrocarbon fuel being supplied to the HCCI engine. Apparatus suitable for carrying out this process is also disclosed.

Growing community of inventors

Chester, United Kingdom

Roger Francis Cracknell