Torrefaction of biomass macroalga Ulva intestinalis using TGA

International Conference on Sustainable Energy and Green Technology 2018

能源学;生态环境科学

Mokhtar, M.F.M.^1 ; Munajat, N.F.^1^2

School of Ocean Engineering, Universiti Malaysia Terengganu, Kuala Terengganu, Terengganu

21030, Malaysia^1

Eastern Corridor Renewable Energy Group (ECRE), School of Ocean Engineering, Universiti Malaysia Terengganu, Kuala Nerus, Terengganu

21030, Malaysia^2

关键词: Chemical functional groups;    Fixed carbons;    Fourier transform infrared;    Marine biomass;    Residence time;    Structural alterations;    Thermo-gravimetric;    Volatile matters;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/268/1/012004/pdf
DOI  :  10.1088/1755-1315/268/1/012004

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The torrefaction of Malaysian marine biomass specie called Ulva intestinalis was studied using thermogravimetric analyser (TGA). The torrefaction temperature and residence time were varied in the range of 200 - 300 °C and 30 - 90 minutes, respectively. The chemical functional groups in the torrefied U. intestinalis were identified by Fourier transform infrared (FTIR). TGA results showed that the torrefaction temperature has a greater influence on the weight loss and changes in the U. intestinalis's properties after the torrefaction as compared to the torrefaction time. The increased in fixed carbon (FC), and carbon (C) content and decreased in volatile matter (VM), moisture content (MC) and oxygen (O) with the severity of torrefaction reflects the improvement of calorific values for the torrefied U. intestinalis. Analysis of the FTIR showed that the torrefaction decreased the spectra intensity of the main functional groups (O-H, C=C, C-O and C-H) as a consequence of structural alteration within the biomass. The present findings may provide useful information for the development of industrial torrefaction processes to turn U. intestinalis into a carbon enrichment solid fuel.