Process intensification in methane generation during anaerobic digestion of Napier grass using supercritical carbon dioxide combined with acid hydrolysis pre-treatment

2014 ◽  
Vol 92 (12) ◽  
pp. 2176-2184 ◽  
Author(s):  
Moreshwar P. Hude ◽  
Ganapati D. Yadav
Keyword(s):  
Carbon Dioxide ◽  
Anaerobic Digestion ◽  
Supercritical Carbon Dioxide ◽  
Acid Hydrolysis ◽  
Process Intensification ◽  
Napier Grass ◽  
Methane Generation ◽  
Pre Treatment ◽  
Supercritical Carbon

scholarly journals Environmentally friendly acetic acid/steam explosion/supercritical carbon dioxide system for the pre-treatment of wheat straw

2021 ◽  
Author(s):  
Samyar Zabihi ◽  
Amir Sharafi ◽  
Hossein Motamedi ◽  
Feridun Esmaeilzadeh ◽  
William O. S. Doherty
Keyword(s):  
Carbon Dioxide ◽  
Acetic Acid ◽  
Supercritical Carbon Dioxide ◽  
Wheat Straw ◽  
Steam Explosion ◽  
Environmentally Friendly ◽  
Pre Treatment ◽  
Supercritical Carbon

Supercritical carbon dioxide and solvent extraction of 2-acetyl-1-pyrroline from Pandan leaf: The effect of pre-treatment

2010 ◽  
Vol 55 (1) ◽  
pp. 200-207 ◽  
Author(s):  
F. Yahya ◽  
T. Lu ◽  
R.C.D. Santos ◽  
P.J. Fryer ◽  
S. Bakalis
Keyword(s):  
Carbon Dioxide ◽  
Solvent Extraction ◽  
Supercritical Carbon Dioxide ◽  
Pre Treatment ◽  
Supercritical Carbon

Effect of the pre-treatment of the samples on the natural substances extraction from L. using supercritical carbon dioxide

Talanta ◽  
2005 ◽  
Vol 67 (1) ◽  
pp. 175-181 ◽  
Author(s):  
L CASAS ◽  
C MANTELL ◽  
M RODRIGUEZ ◽  
M GORDILLO ◽  
A TORRES ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Natural Substances ◽  
Pre Treatment ◽  
Supercritical Carbon

scholarly journals Influence of pre-treatment on enzymatic degumming of apocynum venetum bast fibers in supercritical carbon dioxide

2015 ◽  
Vol 19 (4) ◽  
pp. 1305-1309 ◽  
Author(s):  
Shi-Hui Gao ◽  
Chong-Wen Yu
Keyword(s):  
Carbon Dioxide ◽  
Optimal Design ◽  
Supercritical Carbon Dioxide ◽  
Degradation Rate ◽  
Bast Fiber ◽  
Bast Fibers ◽  
Enzymatic Degumming ◽  
Apocynum Venetum ◽  
Pre Treatment ◽  
Supercritical Carbon

Pre-treatment of apocynum venetum bast fibers in supercritical carbon dioxide can improve the efficiency of enzymatic degumming of apocynum venetum bast fiber. This paper studies experimentally effect of pressure and degumming time on degradation rate, the results can be used for optimal design of degumming.

Supercritical carbon dioxide enhanced pre-treatment of cotton stalks for methane production

Energy ◽  
2020 ◽  
Vol 194 ◽  
pp. 116903 ◽  
Author(s):  
Rafat Al Afif ◽  
Martin Wendland ◽  
Thomas Amon ◽  
Christoph Pfeifer
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Methane Production ◽  
Cotton Stalks ◽  
Pre Treatment ◽  
Supercritical Carbon

Recent advances of use of the supercritical carbon dioxide for the biomass pre-treatment and extraction: A mini-review

2021 ◽  
Vol 98 (1) ◽  
pp. 100018
Author(s):  
Kirtikumar C. Badgujar ◽  
Rutvija Dange ◽  
Bhalchandra M. Bhanage
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Recent Advances ◽  
Pre Treatment ◽  
Supercritical Carbon

scholarly journals Extraction of Bioactive Compounds Using Supercritical Carbon Dioxide

Molecules ◽  
2019 ◽  
Vol 24 (4) ◽  
pp. 782 ◽  
Author(s):  
Antonio Molino ◽  
Vincenzo Larocca ◽  
Giuseppe Di Sanzo ◽  
Maria Martino ◽  
Patrizia Casella ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Flow Rate ◽  
Treatment Time ◽  
Value Added ◽  
Extraction Cycle ◽  
Pre Treatment ◽  
Co2 Flow ◽  
Β Carotene ◽  
Supercritical Carbon

Microalgae Dunaliella salina contains useful molecules such as β-carotene and fatty acids (FAs), which are considered high value-added compounds. To extract these molecules, supercritical carbon dioxide was used at different operative conditions. The effects of mechanical pre-treatment (grinding speed at 0–600 rpm; pre-treatment time of 2.5–7.5 min) and operating parameters for extraction, such as biomass loading (2.45 and 7.53 g), pressure (100–550 bars), temperature (50–75 °C) and CO2 flow rate (7.24 and 14.48 g/min) by varying the extraction times (30–110 min) were evaluated. Results showed that the maximum cumulative recovery (25.48%) of β-carotene was achieved at 400 bars and 65 °C with a CO2 flow rate of 14.48 g/min, while the highest purity for stage (55.40%) was attained at 550 bars and 65 °C with a CO2 flow rate of 14.48 g/min. The maximum recovery of FAs, equal to 8.47 mg/g, was achieved at 550 bars and 75 °C with a CO2 flow rate of 14.48 g/min. Moreover, the lowest biomass loading (2.45 g) and the first extraction cycle (30 min) allowed the maximum extraction of β-carotene and FAs.

scholarly journals Extraction of Cellulose Nanofibers via Eco-friendly Supercritical Carbon Dioxide Treatment Followed by Mild Acid Hydrolysis and the Fabrication of Cellulose Nanopapers

Polymers ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 1813 ◽  
Author(s):  
M. S. Nurul Atiqah ◽  
Deepu A. Gopakumar ◽  
Owolabi F. A. T. ◽  
Yasir Beeran Pottathara ◽  
Samsul Rizal ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Acid Hydrolysis ◽  
Plant Biomass ◽  
Cellulose Nanofibers ◽  
High Energy ◽  
Mild Acid Hydrolysis ◽  
Kenaf Fiber ◽  
Mild Acid ◽  
Supercritical Carbon

The conventional isolation of cellulose nanofibers (CNFs) process involves high energy input which leads to compromising the pulp fiber’s physical and chemical properties, in addition to the issue of elemental chlorine-based bleaching, which is associated with serious environmental issues. This study investigates the characteristic functional properties of CNFs extracted via total chlorine-free (TCF) bleached kenaf fiber followed by an eco-friendly supercritical carbon dioxide (SC-CO2) treatment process. The Fourier transmission infra-red FTIR spectra result gave remarkable effective delignification of the kenaf fiber as the treatment progressed. TEM images showed that the extracted CNFs have a diameter in the range of 10–15 nm and length of up to several micrometers, and thereby proved that the supercritical carbon dioxide pretreatment followed by mild acid hydrolysis is an efficient technique to extract CNFs from the plant biomass. XRD analysis revealed that crystallinity of the fiber was enhanced after each treatment and the obtained crystallinity index of the raw fiber, alkali treated fiber, bleached fiber, and cellulose nanofiber were 33.2%, 54.6%, 88.4%, and 92.8% respectively. SEM images showed that amorphous portions like hemicellulose and lignin were removed completely after the alkali and bleaching treatment, respectively. Moreover, we fabricated a series of cellulose nanopapers using the extracted CNFs suspension via a simple vacuum filtration technique. The fabricated cellulose nanopaper exhibited a good tensile strength of 75.7 MPa at 2.45% strain.

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