摘要:
Some variations provide a process for producing mixed alcohols, comprising: purifying a biogas feedstock to generate a renewable natural gas stream comprising methane; introducing the renewable natural gas stream into a methane-to-syngas unit operated at effective conditions to convert the methane to a first syngas stream containing at least H2, CO, and CO2; purifying the first syngas stream, including separating the CO2 from the first syngas stream, and optionally separating some of the H2 from the first syngas stream, thereby generating a clean syngas stream; introducing the clean syngas stream into a mixed-alcohol reactor operated at effective alcohol synthesis conditions with an alcohol-synthesis catalyst, thereby generating mixed alcohols; and purifying the mixed alcohols to generate a mixed-alcohol product. The mixed-alcohol product may be blended with a hydrocarbon fuel, such as gasoline, to produce a blended fuel. The blended fuel has significantly lower carbon intensity than the base hydrocarbon fuel.
摘要:
Methods and systems for extracting natural gas are described herein. The source of the natural gas may be a reservoir of natural gas or natural gas and crude oil found on land or in a subterranean or subsea environment. The natural gas also may be that extracted from a subsea reservoir of naturally formed clathrate hydrate. The methods may be performed on land, at the sea surface or at the seafloor. The methods feature providing a suitable promoter to facilitate selective formation of a structure II (sII) methane clathrate hydrate to thereby store natural gas in a readily transportable form. The methods may also feature separating both natural gas and associated water involved in producing it from impurities.
摘要:
Polymeric composition comprising, with respect to the total composition: i) 30-95% by weight, preferably between 50-85% by weight with respect to the sum of components i) -vi), of at least one polyester comprising: a) a dicarboxylic component comprising, with respect to the total of the dicarboxylic component: a1) 30-70% by moles of units deriving from at least one aromatic dicarboxylic acid; a2) 70-30% by moles of units deriving from at least one saturated aliphatic dicarboxylic acid; a3) 0-5% by moles of units deriving from at least one unsaturated aliphatic dicarboxylic acid; b) a diol component comprising, with respect to the total diol component: b1) 95-100% by moles of units deriving from at least one saturated aliphatic diol; b2) 0-5% by moles of units deriving from at least one unsaturated aliphatic diol; ii) 0.1-50% by weight with respect to the sum of components i) -vi), of at least one polymer of natural origin; iii) 0.1-10% by weight with respect to the sum of components i) -vi) of at least one polyhydroxy alkanoate different from a lactic acid polyester referred to in point iv); iv) 0-3% by weight with respect to the sum of components i) - vi) of at least one lactic acid polyester; v) 0-1% by weight, preferably 0-0.5% by weight, with respect to the sum of the components i) -vi) of at least one cross-linking agent and / or a chain extender and / or hydrolytic stabilizer comprising at least one compound di- and / or polyfunctional containing isocyanate, peroxide, carbodiimide, isocyanurate, oxazoline, epoxide, anhydride, diviniether groups and mixtures of these; vi) 0 - 15% by weight, with respect to the sum of components i) -vi), of at least one inorganic filling agent.
摘要:
The present disclosure provides improved methods of performing ozonolysis on alkenes comprising non-reductive quenching of ozonide intermediates using Bronsted bases to yield aldehyde, ketone and/or carboxylic acid products.
摘要:
Catalysts and methods for use in conversion of glycerides and free fatty acids to biodiesel are described. A batch or continuous process may be used with the catalysts for transesterification of triglycerides with an alkyl alcohol to produce corresponding mono carboxylic acid esters and glycerol in high yields and purity. Similarly, alkyl and aryl carboxylic acids and free fatty acids are also converted to corresponding alkyl esters. Catalysts are capable of simultaneous esterification and transesterification under same process conditions. The described catalysts are thermostable, long lasting, and highly active.
摘要:
The invention relates to a process for the production of 1,4-butanediol comprising the preparation of a fermentation broth comprising 1,4- butanediol from renewable sources and water, separation of a liquid fraction comprising said 1,4-butanediol and water from one or more solid fractions, said liquid fraction comprising 2-pyrrolidone in an amount higher than 80 ppm, one or more passages of the resulting liquid fraction through a bed comprising one or more cation-exchange resins thereby providing an output pH of said liquid fraction from 4 to 2, one or more passages of the resulting liquid fraction through a bed comprising one or more anion-exchange resins thereby providing an output pH of said liquid fraction from 8 to 11, and the distillation of the liquid fraction thereby provided so as to obtain a composition having a concentration of said 1,4-butanediol higher than 99.0% by weight and comprising 2-pyrrolidone in an amount lower than 6 ppm. The resulting composition should exhibit an APHA color value after ageing of less than 30.
摘要:
Methods of preparing syngas are provided. Blend gas obtained from methane steam reforming can be reacted with CO 2 to provide syngas with various compositions.
摘要:
Die vorliegende Erfindung betrifft ein kontinuierliches Verfahren zur Herstellung von niederen Dialkylcarbonaten als Hauptprodukt und Alkylenglykol als Nebenprodukt durch Umesterung eines zyklischen Alkylencarbonats (z.B. Ethylen- oder Propylencarbonat) mit niederen Alkylalkoholen in Gegenwart eines Katalysators sowie die erforderliche Aufreinigung des Dialkylcarbonats in einem nachfolgenden Verfahrensschritt. Zur Optimierung der Wirtschaftlichkeit und Energieeffizienz des Verfahrens werden zusätzliche Vorrichtungen zur Zwischenerhitzung der apparateintemen Flüssigkeitströme eingesetzt.
摘要:
Systems and methods are provided for enhancing the integration of processes for recovering products from algae-derived biomass. The enhanced process integration allows for increased use of input streams and other reagents that are derived from renewable sources. This increases the overall renewable character of the products extracted from the algae-derived biomass. The process integration can include exchange of input streams or energy between an algae processing system and a system for processing non-algal biomass. One example of improving process integration is using oxygenates that are generated in a renewable manner as a reagent for enhancing the algae processing system.