(476f) Catalytic Conversion of Lignocellulosic Carbohydrates into Drop-in Liquid Hydrocarbons | AIChE

(476f) Catalytic Conversion of Lignocellulosic Carbohydrates into Drop-in Liquid Hydrocarbons


Colaco Morais, A. - Presenter, University of Kansas
Bokade, V., CSIR – National Chemical Laboratory
Niphadkar, P., 2CSIR-National Chemical Laboratory
Siakpebru, O., University of Kansas
Uchagawkar, A., The University of Kansas
Subramaniam, B., University of Kansas
Environmental concerns and the volatility of the liquid transportation fuel market has accelerated the need for sustainable alternatives to petroleum-derived fuels. Although small cars and trucks can transition to electric powered solutions, the same approach is a lot more challenging for the aviation industry to adopt. Thus, the development of drop-in sustainable aviation fuels (SAFs) from lignocellulosic biomass is a major area of focus worldwide. In the present work, a method for direct condensation and hydrodeoxygenation of carbohydrates from lignocellulosic biomass in liquid alkane solvents is proposed, yielding up to C7 alkanes. Such method uses hydrogen pressure and zeolite-supported nickel catalysts at relatively low temperatures (250-300 °C), converting over 90 % of the lignocellulosic biomass to a range of products including alkanes and aromatics in a single step. The faith of cellulose and hemicellulose fractions in the biomass were evaluated using carbon-labeled pure substrates, shedding light on the complex condensation/ hydrodeoxygenation mechanisms that govern the system. A comprehensive product characterization and quantification will be presented for pure substrates and their mixtures. The proposed strategy can be highly integrated with existing petroleum refineries and can represent a significant steppingstone toward the production of bio-based drop-in fuels, including SAFs in petrochemical refineries.