HYDROESTERIFICATION PROCESS FOR PRODUCING BIODIESEL FROM WET MICROALGAE BIOMASS

• Main Authors: REYEZS CRUZ, YORDANKA, GOMES ARANDA, DONATO ALEXANDRE, BACELLAR MENDES, LEONARDO BRANTES, CHENARD DIAS, GISEL, JOÃO, RAFAEL RICHARD
• Format: Patent
• Language: English; French; Portuguese
• Published: 05.06.2014
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; BEER; BIOCHEMISTRY; CHEMISTRY; ENZYMOLOGY; FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE; FIRELIGHTERS; FUELS; FUELS NOT OTHERWISE PROVIDED FOR; LIQUEFIED PETROLEUM GAS; LUBRICANTS; METALLURGY; MICROBIOLOGY; MUTATION OR GENETIC ENGINEERING; NATURAL GAS; ORGANIC CHEMISTRY; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; SPIRITS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K; TECHNICAL GASES CONTAINING CARBON MONOXIDE; VINEGAR; WINE

The present invention relates to the preparation of carboxylic acid ester compounds, biodiesel (B), from microalgae, for use as biofuel in compression ignition. This objective is achieved by means of a wet microalgae biomass (MU) hydroesterification process comprising a hydrolysis step and an esterification step with heterogeneous catalysis. The wet microalgae biomass (MU) is obtained from a culture concentration process and is directly hydrolysed in a hydrolysis column (20). After hydrolysis, fatty acids (C), water (A) and raw glycerin (G) are obtained. The fatty acids (C) are esterified by reactive distillation in the presence of an impregnated heterogeneous catalyst (I). La présente invention concerne la préparation de composés d'esters d'acides carboxyliques, soit de biodiesel (B), à partir de micro-algues, en vue d'une utilisation comme biocombustible dans l'allumage par compression. À cet effet, on fait intervenir un procédé d'hydroestérification d'une biomasse humide de micro-algues (MU), lequel comprend une étape d'hydrolyse et une étape d'estérification par catalyse hétérogène. La biomasse humide de micro-algues (MU) résulte d'un procédé de concentration de culture et est hydrolysée directement dans une colonne d'hydrolyse (20). Après l'hydrolyse, on obtient des acides gras (C), de l'eau (A) et de la glycérine brute (G). Les acides gras (C) sont estérifiés par distillation réactive en présence d'un catalyseur hétérogène imprégné (I). Refere-se a presente invenção à preparação de compostos de ésteres de ácidos carboxílicos, biodiesel (B) a partir de mieroalgas, para a utilização como biocombustível em ignição por compressão. O objetivo é alcançado por meio de um processo de hidroesterificação de biomassa úmida de mieroalgas (MU), o qual compreende uma etapa de hidrólise e uma etapa de esterificação por catálise heterogénea. A biomassa úmida de mieroalgas (MU) é resultante de um processo de concentração de cultivo e é hidrolisada diretamente em uma coluna de hidrólise (20). Após a hidrólise são obtidos ácidos graxos (C), água (A) e glicerina bruta (G). Os ácidos graxos (C) são esterificados por destilação reativa em presença de um catalisador heterogéneo impregnado (I).