Gasification and pyrolysis of Posidonia oceanica in the presence of dolomite

Abstract

HIGHLIGHTS-Posidonia oceanica thermal decomposition is studied. -Combustion, pyrolysis and gasification at different experimental conditions are performed.-The combined effect of the presence of oxygen, air, water vapor and dolomite in the decomposition bed is analysed. -Conditions where maximum ratio H 2 /CO is observed are optimized. ABSTRACTIn the present work, a very detailed study of the reforming of syngas produced in the decomposition of Posidonia oceanica is done. The effect of the presence of different amounts of dolomite is analysed. Also pyrolysis is studied, in nitrogen atmosphere, and gasification in the presence of air, oxygen and different amounts of steam. A detailed discussion on formation and destruction of tars is done. Furthermore, the effect of the heating rate in the decomposition and the residence time of the evolved gases are discussed. Syngas with ratio H 2 /CO from 0.3 to ca. 3 can be obtained from this interesting material. Marine species (microalgae) are usually studied with the aim of cultivate them for gas or oil production, but in this paper we draw attention to the possibility of using a natural resource with a very small impact in the ecosystem.

Pengaruh Suhu Kalsinasi Pada Proses Dekomposisi Dolomit

“…Proses dekomposisi magnesium karbonat terjadi pada suhu lebih rendah dari pada proses dekomposisi kalsium karbonat [14]. Fasa MgO terdekomposisi dari dolomit dan memisah padasuhu kalsinasi 850 o C [15]. Terbentuknya MgO pada proses dekomposisi magnesium karbonat melalui dua tahap yakni proses dehidrasi dan pembentukan MgO [16].…”

Semivolatile and Volatile Compound Evolution during Pyrolysis and Combustion of Colombian Coffee Husk

“…Experimental setup is described in detail elsewhere 22 . The reactor temperature was fixed at 1123 K and excess air ratio (λ), calculated as in Conesa and Domene .…”

Enhanced thermal destruction of toxic microalgal biomass by using CO2

“…Among various disposal options (i.e., anaerobic digestion, landfilling, and so on) (Lin et al, 2007;Passos et al, 2014;Passos et al, 2015) for collected microalgal biomass, the thermo-chemical process (i.e., incineration, pyrolysis, and gasification) (Conesa and Domene, 2015;Liu and Ma, 2008;Yakaboylu et al, 2015) would be the most feasible option due to significant volume reduction and thermal destruction of toxic materials such as MC-LR. Furthermore, energy recovery via the thermo-chemical treatment of microalgal biomass is possible.…”

“…Furthermore, energy recovery via the thermo-chemical treatment of microalgal biomass is possible. Despite these positive advantages stated above, the thermo-chemical process has been known to be an energy intensive process and energy production via the thermo-chemical process has been known as being suitable only for mass production (Conesa and Domene, 2015;Liu and Ma, 2008). Thus, exploiting microalgal biomass as an initial feedstock for the thermo-chemical process could not be an appropriate option due to its seasonal occurrence and insufficient amount as an initial feedstock for the thermo-chemical process.…”

“…Moreover, establishing environmentally benign process would be preferable. However, as compared to the conventional fuels such as coal, previous works done by other authors associated the thermo-chemical process of microalgal biomass was quite limited (Ceylan and Kazan, 2015;Conesa and Domene, 2015;Lopez-Gonzalez et al, 2014;Sharara et al, 2014;Wang et al, 2015a;Wang et al, 2015b).…”