Selected publications

Biorefinery

Hybrid Modeling of Machine Learning and Phenomenological Model for Predicting the Biomass Gasification Process in Supercritical Water for Hydrogen Production

Graphical Representation of Chemical Reactions and Heat Cascade Analysis of Biomass Residue Syngasification to Produce Hydrogen - Process Integration and Optimization for Sustainability

Organosolv fractionation of eucalyptus: Economics of cellulosic ethanol and chemicals versus lignin valorization to phenols and polyolsThis work assessed the economics of the organosolv fractionation of eucalyptus to compare the returns from valorizing lignin to phenols and polyols wi…

Biochemical conversion of sugarcane bagasse into the alcohol fuel mixture of isopropanol-butanol-ethanol (IBE): Is it economically competitive with cellulosic ethanol?This work presents a techno-economic analysis of the production of isopropanol, butanol, and ethanol (IBE) from sugarcane bagasse using clostridia and…

Jet fuel production in eucalyptus pulp mills: Economics and carbon footprint of ethanol vs. butanol pathwayThis work assessed the economics and carbon footprint of alcohol (ethanol vs. n-butanol)-to-jet fuel production using eucalyptus for feedstock. Consid…

Process design and economics of a flexible ethanol-butanol plant annexed to a eucalyptus kraft pulp millThis work proposes a strategy, from a process design standpoint, for pulp companies to enter the Brazilian ethanol market. The flexible plant converts…

Chemical Engineering Teaching in COVID-19 Times: Successfully Adapting a Capstone Design Course to a Remote Format

Techno-economic assessment of bio-oil produced from Eucalyptus forestry residuesForestry residue is potentially useful for obtaining bio-oil and its by-products (biochar, syngas, and acid-rich aqueous extract) via fast pyrolysis. …

Less severe reaction conditions to produce levulinic acid with reduced humins formation at the expense of lower biomass conversion: Is it economically feasible?Esters of levulinic acid constitute a promising class of renewable fuel additives that improve the cold properties of diesel and reduce soot emissions…

Economic potential of 2-methyltetrahydrofuran (MTHF) and ethyl levulinate (EL) produced from hemicelluloses-derived furfuralSugars derived from biomass hemicelluloses, especially pentoses, have low value because they are generally not suitable for industrial fermentation pr…

Graphical Analysis of Plant-Wide Heat Cascade for Increasing Energy Efficiency in the Production of Ethanol and Sugar from Sugarcane - Process Integration and Optimization for Sustainability

Global View of Biofuel Butanol and Economics of Its Production by Fermentation from Sweet Sorghum Bagasse, Food Waste, and Yellow Top Presscake: Application of Novel Technologies

Making Levulinic Acid and Ethyl Levulinate Economically Viable: A Worldwide Technoeconomic and Environmental Assessment of Possible RoutesFrom field to function: Ethyl levulinate is a diesel additive with great market potential. However, worldwide-scale production is not yet a reality due to several gaps in conversion technology. This ...

Comparative Techno-Economic and Exergetic Analysis of Circulating and Dual Bed Biomass Gasification Systems

Clostridia and Process Engineering for Energy Generation* Major market and technological aspects related to the fermentative production of n-butanol by Clostridia are reviewed in this chapter. In the first section various technological aspects are provided ...

Green Energy in Africa, Asia, and South AmericaThe current status of commercial deployment of green energy technologies in South America, Africa, Southeast Asia, and China, is reviewed in this chapter with an emphasis on biofuels. An overview of ...

Techno-Economic Analysis of Cogeneration of Heat and Electricity and Second-Generation Ethanol Production from SugarcaneThis chapter addresses the economic feasibility of conventional sugar mills producing ethanol, sugar, and electricity, and their projected future conf…

How Brazilian Pulp Mills will look like in the future

Due diligence for sugar platform biorefinery projects: technology risk

Fermentation

Sugarcane bagasse hydrolysates as feedstock to produce the isopropanol-butanol-ethanol fuel mixture: Effect of lactic acid derived from microbial contamination on Clostridium beijerinckii DSM 6423Enzymatic hydrolysis of lignocellulose under industrial conditions is prone to contamination by lactic acid bacteria, and in this study, a cellulose h…

Co-fermentation of sugarcane bagasse hydrolysate and molasses by Clostridium saccharoperbutylacetonicum: Effect on sugar consumption and butanol productionCo-fermentation of mixed sugars to produce butanol is an attractive route in sucrochemical production chains. Herein, high-level mixed sugars from sug…

Three-stage repeated-batch immobilized cell fermentation to produce butanol from non-detoxified sugarcane bagasse hemicellulose hydrolysatesTo enable the production of butanol with undiluted, non-detoxified sugarcane bagasse hemicellulose hydrolysates, this study developed a three-staged r…

Isopropanol-butanol-ethanol production by cell-immobilized vacuum fermentationThe Isopropanol-Butanol-Ethanol productivity by solventogenic clostridia can increase when cells are immobilized on low-cost, renewable fibrous materi…

Enabling butanol production from crude sugarcane bagasse hemicellulose hydrolysate by batch-feeding it into molasses fermentationButanol is a chemical and advanced biofuel whose fermentative production from hemicellulose hydrolysates is hindered by lignocellulose-derived microbi…

Isopropanol-butanol-ethanol (IBE) production in repeated-batch cultivation of Clostridium beijerinckii DSM 6423 immobilized on sugarcane bagasseThe IBE mixture is a potential automotive fuel, and its production by Clostridium beijerinckii DSM 6423, the best known natural IBE producer, is hinde…

Acetone-free biobutanol production: Past and recent advances in the Isopropanol-Butanol-Ethanol (IBE) fermentationProduction of butanol for fuel via the conventional Acetone-Butanol-Ethanol fermentation has been considered economically risky because of a potential…

Towards enhanced n-butanol production from sugarcane bagasse hemicellulosic hydrolysate: Strain screening, and the effects of sugar concentration and butanol toleranceRobust strains are essential towards success of n-butanol production from lignocellulosic feedstock. To find a suitable strain to convert a non-detoxi…

Resolving mismatches in the flexible production of ethanol and butanol from eucalyptus wood with vacuum fermentation - Bioprocess and Biosystems Engineering

Butanol inesperadoUm frasco com um líquido amarelado fervendo numa bancada de laboratório pode conter revelações surpreen-dentes. De um caldo de água, açúcar e bactérias, o engenheiro químico Adriano Mariano, da Universidade Estadual de Campinas (Unicamp), conseguiu extrair o butanol, um potencial combustível, por meio de um método declarado inapropriado em décadas passadas: o vácuo. “Quebramos um paradigma”, afirma Rubens Maciel Filho, da Unicamp, engenheiro químico e supervisor do projeto, parte do Programa FAPESP de Pesquisa em Bioenergia, o Bioen. “O uso do vácuo não é novo, o que é novo é usá-lo para extrair butanol”, reforça Mariano. Com base em seus…

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