Abstract
To evaluate the possibilities for biofuel and bioenergy production Acacia Holosericea, which is an invasive plant available in Brunei Darussalam, was investigated. Proximate analysis of Acacia Holosericea shows that the moisture content, volatile matters, fixed carbon, and ash contents were 9.56%, 65.12%, 21.21%, and 3.91%, respectively. Ultimate analysis shows carbon, hydrogen, and nitrogen as 44.03%, 5.67%, and 0.25%, respectively. The thermogravimetric analysis (TGA) results have shown that maximum weight loss occurred for this biomass at 357 °C for pyrolysis and 287 °C for combustion conditions. Low moisture content (<10%), high hydrogen content, and higher heating value (about 18.13 MJ/kg) makes this species a potential biomass. The production of bio-char, bio-oil, and biogas from Acacia Holosericea was found 34.45%, 32.56%, 33.09% for 500 °C with a heating rate 5 °C/min and 25.81%, 37.61%, 36.58% with a heating rate 10 °C/min, respectively, in this research. From Fourier transform infrared (FTIR) spectroscopy it was shown that a strong C–H, C–O, and C=C bond exists in the bio-char of the sample.
Highlights
The rapid growth of invasive plants is a severe threat to natural ecosystems throughout the world as well as the danger to public health and economies [1,2]
The results of this study demonstrate that Acacia Holosericea is an excellent source
The results of this study demonstrate that Acacia Holosericea is an excellent source of biomass for its rapid growth rate and easy accumulation
Summary
The rapid growth of invasive plants is a severe threat to natural ecosystems throughout the world as well as the danger to public health and economies [1,2]. Modern developments in biofuel technology envision a new approach to manage invasive plants by converting them into value-added products, such as bio-char and bioenergy [5]. With biomass residence times of a few seconds, generates more bio-oil and less bio-char. Slow pyrolysis, for which biomass residence times can be hours to days, produces more bio-char and less bio-oil [13,14,15]. Acacia trees exhibit high biomass production within a few years because of their fast growth and can be utilized as a sustainable resource for biofuel production by minimizing these invasive plants [18,19]. The objective of this research is to develop an innovative strategy to produce value-added bioenergy from the Acacia Holosericea species. The results generated in this study may lead to scale-up actions aimed at the use of invasive biomass for the production of biofuels or fine chemicals
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