scholarly journals Optimization of two steps pretreatment techniques on lignin elimination in wheat straw to improve the bio-oil quality

2020 ◽  
Vol 13 (2) ◽  
pp. 195-211
Author(s):  
A.K. Verma ◽  
Shobhit Lakhera ◽  
Khan Chand ◽  
Ashutosh Dubey ◽  
T.K. Bhattacharya
Keyword(s):  
Response Surface Methodology ◽  
Wheat Straw ◽  
Lignin Content ◽  
Oil Quality ◽  
Fast Pyrolysis ◽  
Reducing Sugar ◽  
Cross Linking ◽  
Glucose Content ◽  
Enzymatic Pretreatment ◽  
Bio Oil

Cross-linking of degraded lignin components present to bio-oil increases the density and causes instability during storage. Bio-oil quality and quantity from wheat straw was improved by alkaline and enzymatic treatment before pyrolysis. Alkaline pretreatment reduced the lignin content from 18 per cent to 10 per cent. Enzymatic pretreatment using -glucosidase and cellulase in ratio 5:10, 10:10, 15:10 U for 24, 48, 72 h was optimized by using Response Surface Methodology (RSM) and eliminated 3.1 per cent lignin. The maximum reducing sugar and glucose content was found 24.2 g/L and 15.488 g/L, respectively. Bio-oil yield by fast pyrolysis of treated and untreated wheat straw was 30 per cent and 27 per cent, respectively. Bio-oil of the treated wheat straw exhibited increased in pH, higher density and decreased in viscosity. The flash point of bio-oil from treated wheat straw was very close to commercial diesel. Bio-oil was characterized by FTIR and GC-MS analysis.

scholarly journals Enhancing bio-oil quality and energy recovery by atmospheric hydrodeoxygenation of wheat straw pyrolysis vapors using Pt and Mo-based catalysts

2020 ◽  
Vol 4 (4) ◽  
pp. 1991-2008 ◽  
Author(s):  
Andreas Eschenbacher ◽  
Alireza Saraeian ◽  
Brent H. Shanks ◽  
Peter Arendt Jensen ◽  
Chengxin Li ◽  
...  
Keyword(s):  
Wheat Straw ◽  
Energy Recovery ◽  
Oil Quality ◽  
Fast Pyrolysis ◽  
Transportation Fuels ◽  
Bio Oil

Atmospheric hydrodeoxygenation (HDO) of wheat straw fast pyrolysis vapors was studied as a promising route for the production of renewable liquid transportation fuels.

Physical, chemical, thermal and biological pre-treatment technologies in fast pyrolysis to maximize bio-oil quality: A critical review

2019 ◽  
Vol 128 ◽  
pp. 105333 ◽  
Author(s):  
Brenda J. Alvarez-Chavez ◽  
Stéphane Godbout ◽  
Joahnn H. Palacios-Rios ◽  
Étienne Le Roux ◽  
Vijaya Raghavan
Keyword(s):  
Critical Review ◽  
Oil Quality ◽  
Fast Pyrolysis ◽  
Physical Chemical ◽  
Bio Oil ◽  
Treatment Technologies ◽  
Pre Treatment

Effects of Lignin Content and Temperature on the Properties of Hybrid Poplar Bio-Oil, Char, and Gas Obtained by Fast Pyrolysis

2017 ◽  
Vol 31 (3) ◽  
pp. 2879-2886 ◽  
Author(s):  
Bethany Klemetsrud ◽  
Dominic Eatherton ◽  
David Shonnard
Keyword(s):  
Lignin Content ◽  
Hybrid Poplar ◽  
Fast Pyrolysis ◽  
Bio Oil

Catalytic Fast Pyrolysis: Influencing Bio-Oil Quality with the Catalyst-to-Biomass Ratio

2016 ◽  
Vol 5 (1) ◽  
pp. 94-103 ◽  
Author(s):  
Ville Paasikallio ◽  
Konstantinos Kalogiannis ◽  
Angelos Lappas ◽  
Jani Lehto ◽  
Juha Lehtonen
Keyword(s):  
Oil Quality ◽  
Fast Pyrolysis ◽  
Catalytic Fast Pyrolysis ◽  
Bio Oil ◽  
Biomass Ratio

scholarly journals Catalytic fast pyrolysis of Pearl Millet and Sida cordifolia L. to investigate products distribution and bio-oil quality

2020 ◽  
Author(s):  
Zakari BOUBACAR LAOUGE ◽  
Hasan MERDUN
Keyword(s):  
Pearl Millet ◽  
Oil Quality ◽  
Fast Pyrolysis ◽  
Value Added ◽  
Catalytic Fast Pyrolysis ◽  
Oxygenated Compounds ◽  
Bio Oil ◽  
Biomass Resources ◽  
High Production ◽  
Sida Cordifolia

Abstract Fast pyrolysis is an attractive way of converting abundant biomass resources into valuable products such as bio-oil. Nevertheless, high oxygenated compounds and water content of bio-oil limit its direct use as fuel or chemicals. Catalytic fast pyrolysis (CFP) is able to improve bio-oil properties so that downstream upgrading processes can be economically feasible. In this study five different catalysts such as zeolite socony mobil-5 (ZSM-5), cerium dioxide (CeO2), zirconium dioxide (ZrO2), zinc oxide (ZnO), and sodium carbonate (Na2CO3) were employed due to their potential in enhancing bio-oil properties. CFP of pearl millet (PM) and Sida cordifolia (Sida) was performed to investigate the effects of catalysts on the products distribution and chemical contents of bio-oil. The results showed that bio-oil yield decreased during CFP regardless of catalyst and biomass types. Among all catalysts, CeO2 was found to be the most suitable to produce acids and alkanes from CFP of PM; and acids, ketones, and aromatics from CFP of Sida. The high production of ketones from PM and alkanes from Sida was observed with Na2CO3 catalyst. The ZrO2 catalyst indicated the high aromatics production from PM, whereas alcohols, amines, and others were abundant in bio-oil from CFP of PM using ZSM-5. Overall, PM and Sida can be used to produce fuel or value-added chemicals through CFP.

Environmental impact comparison of wheat straw fast pyrolysis systems with different hydrogen production processes based on life cycle assessment

2021 ◽  
pp. 0734242X2110450
Author(s):  
Xiang Zheng ◽  
Zhaoping Zhong ◽  
Bo Zhang ◽  
Haoran Du ◽  
Wei Wang ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Hydrogen Production ◽  
Environmental Impact ◽  
Wheat Straw ◽  
Aqueous Phase ◽  
Fast Pyrolysis ◽  
Maximal Effect ◽  
Production Processes ◽  
Bio Oil

This study aimed to evaluate the environmental impact of 1000 kg h−1 wheat straw to produce biofuel via fast pyrolysis with three different hydrogen production processes by the life cycle assessment (LCA) based on Chinese Life Cycle Database (CLCD). The primary energy depletion (PED), global warming potential (GWP), abiotic depletion potential (ADP) and respiratory inorganics (RI) impact categories of 1 MJ biofuel produced were employed for comparison. In case 1, the hydrogen was derived from natural gas steam reforming, and all the bio-oil was hydrotreated to produce the biofuel. In case 2, a part of the aqueous phase was reformed to produce hydrogen, whereas the remaining bio-oil was hydrotreated to produce biofuel. In case 3, all the aqueous phase of bio-oil was reformed to produce hydrogen, a part of hydrogen generated by reforming was used to oil phase hydrotreated and the excess hydrogen was considered as a co-product. Our results show that the PED, GWP, ADP and RI of case 3 are 0.1355 MJ, −17.96 g CO2eq., 0.0338 g antimonyeq and 0.0461 g PM2.5eq.. Compared with conventional diesel, the PED, GWP, ADP and RI of case 3 were reduced by 89.81, 117.44, 1.74 and 85.03%, respectively. The results of sub-process contribution analysis and sensitivity analysis suggested that the electricity consumption for the bio-oil production has the maximal effect on the total PED, GWP and RI of case 3, whereas the amount of fertilizers in the biomass production sub-process has the maximal effect on the total ADP.

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