Ananda Amarasekara

Professor
Ph.D., City University of New York

Contact information:

Room: 230F NSB
Department of Chemistry
Prairie View A&M University
MS 2215
P.O. Box 519
Prairie View, Texas 77446

Phone: 936-261-3107
Fax: 936-261-3117
E-mail:asamarasekara@pvamu.edu

Areas of interest

  • Biomass based fuels and feedstock chemicals for polymer industry
  • Catalysis
  • Ionic liquids

Current Activities

  • We are currently studying the Brönsted acidic ionic liquid catalyzed hydrolysis of cellulose and lignocellulosic biomass for the production of biofuels and renewable feedstock chemicals from non-food biomass resources. In 2009 our research group introduced the use of sulfonic acid group functionalized Brönsted acidic ionic liquids for concurrent dissolution and hydrolysis of cellulose under mild conditions. In these experiments cellulose (DP ~ 450) was found to dissolve up to 20% w/w in 1- (1-propylsulfonic)-3-methylimidazolium chloride and could be hydrolyzed into glucose at 70 °C and atmospheric pressure in excellent yields. Brönsted acidic ionic liquid and metal ion catalyzed degradation of lignocellulosic biomass forms like switch grass and corn stover in aqueous medium at moderate temperature and pressure is another area of interest. Furthermore, we are interested in selective dehydration of abundant carbohydrates to produce furan derivatives such as 5-hydroxymethylfurfural (HMF) and further transformations to hydrocarbon type 3rd generation biofuels as well as feedstock chemicals. Oxidation of HMF using green chemistry technologies is another area of study, involving the development of catalysts and environmentally friendly oxidation methods for the preparation of furan-dialdehyde and furan-dicarboxylic acid from HMF.
  • Secondly our group is interested in the development of next generation polymeric materials from renewable resources based monomers. We are currently studying the synthesis of novel polymers based on renewable feedstocks such as levulinic acid, succinic acid, glycerol, lactic acid, HMF, and vanillin.

Selected publications (total  ~ 110 publications)

  1. Raney-Ni catalyzed conversion of levulinic acid to 5-methyl-2-pyrrolidone using ammonium formate as the H and N source. Ananda S. Amarasekara, Yen Maroney Lawrence,  Tetrahedron Letters, 2018, 59(19), 1832-1835.
  2. Renewable polymers: Synthesis and characterization of poly(levulinic acid - pentaerythritol). Ananda S. Amarasekara, Uyen Ha, Nnaemeka C. OkorieJournal of Polymer Science Part A: Polymer Chemistry, 2018, 56, 955-958.
  3. 1-(3-Alkylsulfonic)-3-methylimidazolium chloride Brönsted acidic ionic liquid catalyzed hydrogen peroxide oxidations of biomass derived furan aldehydes. Ananda S. Amarasekara, Nnaemeka C. Okorie, Catalysis communications,. 2018, 108, 108-112.
  4. Sulfuric acid and Amberlyst-H+ catalyzed condensation reactions of renewable keto acids with paraformaldehyde: Synthesis of a new dispiro bis-lactone ring system 2,9,13-trioxadispiro[4.1.4.3]tetradecane-3,6,10-trione. Ananda S. Amarasekara, Uyen Ha, Marina S. Fonari, Shabari Nath Bejagam, Davor Margetić., RSC Advances, 2017, 7, 23917-23923.
  5. Acidic ionic liquid polymers: poly(bis-imidazolium-p-phenylenesulfonic acid) and applications as catalysts in the preparation of 1-amidoalkyl-2-naphthols. Ananda S. Amarasekara, Jennifer Nguyen, Ashfaqur Razzaq.  Journal of Polymer Research, 201724(3),  52-58.
  6. A two step efficient preparation of a renewable dicarboxylic acid monomer 5,5'- [oxybis(methylene)]bis[2-furancarboxylic acid] from D-fructose and application in polyester synthesis. Ananda S. Amarasekara, Loc H. Nguyen, Nnaemeka C. Okorie and Saad M. Jamal, Green Chemistry2017, 19, 1570–1575.
  7. Origin of the Regioselectivity in the Aldol Condensation between Hydroxymethylfurfural and Levulinic Acid: A DFT Investigation. Liwei Zhao, Nnenna Elechi, Richard Qian, Timila B. Singh, Ananda S. Amarasekara, and Hua-Jun Fan.  Journal of Physical Chemistry. A, 2017, 121(9), 1985-1992.
  8. Renewable polymers: Synthesis and characterization of poly(4-ketopimelic acid-glycerol). Ananda S. Amarasekara, Muhammad A. Hasan, Eve Larkin.  2017Journal of Renewable Materials, 5(1), 62-66.
  9. A two step method for the preparation of carbamate cross-linked cellulose films using an ionic liquid and their water retention properties. Ananda S. Amarasekara, Muhammad A. Hasan, and Uyen Ha, Carbohydrate Polymers, 2016,  154, 8-12.
  10. Acid catalyzed competitive esterification and ketalization of levulinic acid with 1,2 and 1,3- diols: The effect of heterogeneous and homogeneous catalysts. Ananda S. Amarasekara and Moriam  A. Animashaun.  Catalysis Letters, 2016, 146(9), 1819-1824.
  11. Acidic ionic liquids. Ananda S. Amarasekara Chemical Reviews, 2016, 116, 6133−6183.
  12. Acid catalyzed condensation of levulinic acid with glyoxylic acid: Synthesis of 1-methyl-2,8-dioxabicyclo[3.3.0]oct-4-ene-3,7-dione.  Ananda S. Amarasekara and Uyen Ha. Tetrahedron Letters, 2016, 57, 2598-2600.
  13. The effect of manganese(II)chloride as a co-catalyst on cellobiose hydrolysis in dilute aqueous sulfuric acid and acidic ionic liquid mediums. Ananda S. Amarasekara and Bernard Wiredu. Catalysis Communications, 2016, 81, 41-44.
  14. Interactions of D-cellobiose with selected chloride salts: a 13C NMR and FT-IR study. Ananda S. Amarasekara and Bernard Wiredu, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy.  2016, 159, 113–116.
  15. Chemocatalytic Hydrolysis of Cellulose at 37 °C, 1 Atm. Ananda S. Amarasekara and Bernard Wiredu, Catalysis Science and Technology., 2016, 6, 426 - 429.

Book: Handbook of Cellulosic Ethanol

By Ananda S. Amarasekara
ISBN: 9781118233009, 608 pages | 89 illustrations, Wiley-Scrivener Publishers, 2014

http://www.amazon.com/Handbook-Cellulosic-Ethanol-Ananda-%20%20Amarasekara/dp/111823300X/ref=sr_1_1?ie=UTF8&qid=1384388964&sr=8-1&keywords=ananda+amarasekara

Ananda Amarasekara