CO2 adsorption of bagasse waste feedstock using thermogravimetric analyses

Author(s)

Peres, Christiano Bruneli ; Rosa, Andre Henrique ; de Morais, Leandro Cardoso

• Document type: Journal article
• Source: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY; v. 147, n. 10, p. 12-pg., 2021-06-23.

Abstract

Nowadays, global warming is mainly caused by increase in CO2 concentration in the environment; to mitigate this problem, an attractive strategy for efficient CO2 emission reduction was applied: carbon capture. Therefore, this work had as main objective to measure the capture of CO2, through two carbonaceous materials produced from sugar cane bagasse; this biochar was activated chemically with KOH, by two different processes: the impregnated biochar (CA-1) was taken to pyrolysis process at 350 degrees C and another sugarcane bagasse sample was also impregnated, but directly in dry biomass (CA-2), obtaining two carbonaceous material (CA-1 and CA-2), respectively. The prepared carbons were characterized by thermal analysis with heating rate of 10 degrees C min(-1) in N-2 atmosphere, showing two main stages: the first one close to 150 degrees C for biochar samples and the second one in the range of 150-600 degrees C for the same biochar samples, X-ray diffraction (XRD, peaks at 2 theta = 28.41 degrees; 40.50 degrees; 44.52 degrees; 50.29 degrees and 58.61 degrees for CA-1 and 2 theta = 28.27 degrees; 40.45 degrees; 44.60 degrees; 50.15 degrees and 58.63 degrees for CA-2), scanning electron microscopy (SEM) with energy-dispersive X-ray (EDX) and Fourier transform infrared spectroscopy (FTIR, showing peaks at 3675, 2926, 1559, 1364, 1026 and 916 cm(-1) for the biochar samples). CO2 capture was performed by thermogravimetric running test. The samples showed similar physico-chemical characteristics, but the CA-2 sample showed better adsorption performance (1.22 mmol CO2 g(-1)). Heat treatment in an inert atmosphere and chemical activation of biomass are recommended for obtaining carbonaceous material for use in carbon dioxide adsorption processes. (AU)

• FAPESP's process: 18/03138-7 - CO2 capture on activated carbon derived from sugarcane bagasse biomass (Saccharum officinarum)
• Grantee: Christiano Bruneli Peres
• Support Opportunities: Scholarships in Brazil - Master