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Photobioreactor of Microalgas for CO_(2) Biofixation

Journal of Power and Energy Engineering 2019年第1期7卷 91-106页

作者： Yordanka Reyes Cruz.Gisel Chenard Díaz.and.eina z. figuera leonett René Gonz.lez.Carliz.Vinicius Rossa Luciano Basto Oliveira Maurílio Novais da Paixao Donato Alexandre Gomes Aranda School of Chemistry Federal University of Rio de Janeiro (EQ/UFRJ) Rio de Janeiro Brazil Faculty of Chemical Engineering Federal University of Uberlandia (FEQUI/UFU) Minas Gerais Brazil International Virtual Institute for Global Change (IVIG/COPPE/UFRJ) Rio de Janeiro Brazil

Microalgae are unicellular organisms capable of photosynthesis, turning sunlight and carbon dioxide (CO2) into rich biomass. Precisely because of this definition, in recent years various sectors have been targeting their ability to reduce CO2 emissions and the capacity of simultaneously synthesiz. biomass which can be later used to produce bio-fuels. Besides being considered fast-growth microorganisms, microalgae have a diverse biochemical composition with similar characteristics to traditional biomass. In this context, the present work aimed to evaluate the biofixation of CO2 by the microalgae Monoraphidium sp., cultivated in a closed-window type photobioreactor, as well as characteriz.tion of microalgal biomass produced in relation to the total lipid content (TL), lipids converted into biodiesel (LCB), carbohydrates and proteins. The results achieved showed that the best result was obtained after 24 h of cultivation, where for each gram of biomass produced approximately 1.2 g of CO2 were consumed. In the growth phase the average biomass productivity in the Janela photobioreactor was 58 mg·L-1·day-1 concluding that microalgae culture systems could be coupled to the chimneys of large industries emitters CO2 using this gas, resulting from combustion processes, in the process of photosynthesis. The biomass Monoraphidium sp. produced had a content of lipids converted into biodiesel of approximately 8.36% ± 2.69%, carbohydrates 32% ± 3.37% and proteins 34.26% ± 0.41%.

关键词： Biomass CO_(2) Capture Cultivation Microalgae Photobioreactor

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Bio-Oil Extracted of Wet Biomass of the Microalga <i>Monoraphidium</i>sp. for Production of Renewable Hydrocarbons

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Journal of Power and Energy Engineering 2019年第1期7卷 80-90页

作者： Yordanka R. Cruz.Gisel Ch. Díaz.Viviane de S. Borges and.eina z. F. leonett René G. Carliz.Vinicius Rossa Vitor M. E. S. Silva Carolina Vieira Viegas Donato A. G. Aranda Luciano B. Oliveira GREETEC Laboratory Federal University of Rio de Janeiro (UFRJ) Rio de Janeiro Brazil GCAT Laboratory Federal University of Uberladia (UFU) Rio de Janeiro Brazil Research Company Energetic (EPE) Rio de Janeiro Brazil

Renewable hydrocarbons refer to fuels consisting of hydrocarbons of 10 to 20 carbon atoms, produced from biomass, and free of oxygen. Hydrocracking, hydrodeoxygenation and hydrotreatment processes for the production of renewable hydrocarbons are described in the literature. Microalgae have been targeted in recent years to synthesiz. biomass that can be used in the production of biofuels, such as renewable hydrocarbons, biodiesel or ethanol second generation. In this context the lineage Monoraphidium sp. was selected from previous ecophysiological studies and its potential to produce lipids to develop this research related with the extraction of the bio-oil of the wet biomass of Monoraphidium sp. through heat treatment. Consecutively the bio-oil was used as raw material for the production of hydrocarbons through hydrocracking and hydrodeoxygenation processes (HDO) as: decarbonylation, decarboxylation, dehydratation, with in situ production of hydrogen from liquid-phase reforming of glycerol. The reactions were carried out under two different temperature conditions, 350°C and 300°C, respectively, for 1 h and using ruthenium alumina catalyst (Ru/Al2O3). The results showed the bio-oil processing route at a temperature of 350°C promising for the production of hydrocarbons achieving a conversion of 81.54%.

关键词： Renewable Hydrocarbons Hydrotreatment Bio-Oil Monoraphidium sp.

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