Thermochemical Conversion and Valorization of Woody Lignocellulosic Biomass in Hydrothermal Media

Devi, V. Chitra; Mothil, S.; Raam, R. Sathish; Kumar, K. Senthil

doi:10.1007/978-981-15-0410-5_4

Cited by 3 publications

(1 citation statement)

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“…The process is meant to provide a means for treating wet materials without drying and to access ionic reaction conditions by maintaining a liquid water processing medium. SCWE has many favorable advantages that other processes lack, where it results in high yield of various chemicals like acids, alcohols, alkanes, alkenes, aldehydes, ketones, esters, ethers, phenols, and other aromatic compounds with some amount of polymeric impurities [20]. There are few studies on the conversion of the woody Prosopis juliflora biomass into bio-oil as separate and in combination with hydrocarbon wastes namely: combustion, gasification, torrefaction, microwave pyrolysis, co-thermal liquefaction, etc [21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Optimization Studies on Subcritical Water Extraction of Fuels and Fine Chemicals from Prosopis juliflora: An Invasive Weed Tree

Venkatachalam¹,

Sengottian²,

Ravichandran³

et al. 2020

Period. Polytech. Chem. Eng.

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Waste lignocellulosic biomass obtained from the dry plant matter is the most abundantly available resource for the production of biofuels, and biochar. The invasive weed tree of Prosopis juliflora was employed as feedstock for the extraction process, which converts biomass into biogas, bio-oil, and biochar in the presence of subcritical water at high temperatures (250 °C to 374 °C) and pressures (4-22 MPa). The extraction process was performed inside a 50 ml stainless steel hydrothermal reactor with 3.5 g of feedstock and varying process parameters such as temperatures (250–325 °C) and reaction time (30–120 min) and biomass to water loading (10–30 % w/v). The response surface methodology was employed to optimize the parameters for maximizing the bio-oil yield under subcritical condition using Design Expert 8.0.7.1 software. The % yield of bio-oil and biochar during this process were taken as responses. The biomass and bio-oil were characterized using proximate and ultimate elemental analysis, thermogravimetric analysis, and gas-chromatography mass spectroscopy. The results showed that the maximal yield of bio-oil 3.65 % was obtained at a temperature of 277.62 °C, reaction time 59.98 min and biomass to water loading 20.13 % w/v. The resulted bio-oil was found to contain long-chain alkanes, ketones, carboxylic acids, amines, and phenols.

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