Glycerol conversion into value-added products in presence of a green recyclable catalyst: Acid black carbon obtained from coffee ground wastes

Author(s)

Goncalves, Maraisa ^{[1, 2]} ; Soler, Felipe Coelho ^[1] ; Isoda, Noemia ^[1] ; Carvalno, Wagner Alves ^[1] ; Mandelli, Dalmo ^[1] ; Sepulveda, Jorge ^[3]

Affiliation

^[1] Fed Univ ABC, Ctr Nat & Human Sci, Santa Adelia St 166, BR-09210170 Santo Andre, SP - Brazil

^[2] Univ Fed Sao Paulo, Inst Sci & Technol, Talim St 330, BR-12231280 Sao Jose Dos Campos, SP - Brazil

^[3] UNL CONICET, Inst Invest Catalisis & Petroquim INCAPE, Santiago del Estero 2654, RA-3000 Santa Fe - Argentina

• Document type: Journal article
• Source: Journal of the Taiwan Institute of Chemical Engineers; v. 60, p. 294-301, MAR 2016.
• Web of Science Citations: 6

Abstract

Black carbon from coffee grounds (BCC) was treated with sulfuric acid (BCC-S) or fuming sulfuric acid (BCC-SF) and utilized as catalysts in glycerol etherification reactions. The BCC-SF showed a high amount of sulfur groups, about 8%. However, the treated BCC-S showed the lowest amount of sulfur groups, about 3%. Furthermore, these catalysts show high catalytic activity in the glycerol etherification with tert-butyl alcohol (TBA), the activity being higher for the BCC-SF. The yields for mono-tert-butyl glycerol (MTBG), di-tert-butyl glycerol (DTBG) and tri-tert-butyl-glycerol (TTBG) were very similar to those obtained using a commercial resin, Amberlyst-15. The yields for BCC-SF were about 40 and 20% for the MTBG and DTBG + TTBG, respectively. Furthermore, the acid black carbons showed high stability of the active groups and can be reused in consecutive reactions. (C) 2015 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 11/22264-4 - Utilization of lignocelulosic and glycerol wastes for production of catalysts with acidic properties
• Grantee: Maraisa Gonçalves
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 13/21160-6 - Catalytic conversion of glycerol and acetol promoted by metal nanoparticles supported on carbon and molecular sieves
• Grantee: Wagner Alves Carvalho
• Support Opportunities: Regular Research Grants
• FAPESP's process: 14/18529-0 - Preparation of activated carbon with high surface area from biodiesel waste
• Grantee: Maraisa Gonçalves
• Support Opportunities: Scholarships in Brazil - Young Researchers