scholarly journals Hydrothermal Liquefaction of Water Hyacinth: Effect of Process Conditions and Magnetite Nanoparticles on Biocrude Yield and Composition

2021 ◽  
Vol 11 (04) ◽  
pp. 157-186
Author(s):  
Dan Egesa ◽  
Patrick Mulindwa ◽  
Edward Mubiru ◽  
Hilda Dinah Kyomuhimbo ◽  
Godwin Aturagaba
Keyword(s):  
Magnetite Nanoparticles ◽  
Water Hyacinth ◽  
Hydrothermal Liquefaction ◽  
Process Conditions

Influence of process conditions on hydrothermal liquefaction of eucalyptus biomass for biocrude production and investigation of the inorganics distribution

2021 ◽  
Author(s):  
Tahir Hussain Seehar ◽  
Saqib Sohail Toor ◽  
Kamaldeep Sharma ◽  
Asbjørn Haaning Nielsen ◽  
Thomas Helmer Pedersen ◽  
...  
Keyword(s):  
Hydrothermal Liquefaction ◽  
Process Conditions

In the present study, eucalyptus biomass was processed to produce biocrude via hydrothermal liquefaction.

scholarly journals Green Technology for Remediation of Water Polluted with Petroleum Crude Oil: Using of Eichhornia crassipes (Mart.) Solms Combined with Magnetic Nanoparticles Capped with Myrrh Resources of Saudi Arabia

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 262 ◽  
Author(s):  
Ayman M. Atta ◽  
Nermen H. Mohamed ◽  
Ahmad K. Hegazy ◽  
Yasser M. Moustafa ◽  
Rodina R. Mohamed ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Crude Oil ◽  
Magnetite Nanoparticles ◽  
Water Hyacinth ◽  
Eichhornia Crassipes ◽  
Oil Contamination ◽  
Plant Tissues ◽  
Petroleum Crude ◽  
Crude Petroleum ◽  
Petroleum Oil

Crude oil pollution of water bodies is a worldwide problem that affects water ecosystems and is detrimental to human health and the diversity of living organisms. The objective of this study was to assess the ability of water hyacinth (Eichhornia crassipes (Mart.) Solms) combined with the presence of magnetic nanoparticles capped with natural products based on Myrrh to treat fresh water contaminated by crude petroleum oil. Magnetic nanoparticles based on magnetite capped with Myrrh extracts were prepared, characterized, and used to adsorb heavy components of the crude oil. The hydrophobic hexane and ether Myrrh extracts were isolated and used as capping for magnetite nanoparticles. The chemical structures, morphologies, particle sizes, and magnetic characteristics of the magnetic nanoparticles were investigated. The adsorption efficiencies of the magnetic nanoparticles show a greater efficiency to adsorb more than 95% of the heavy crude oil components. Offsets of Water hyacinth were raised in bowls containing Nile River fresh water under open greenhouse conditions, and subjected to varying crude oil contamination treatments of 0.5, 1, 2, 3, and 5 mL/L for one month. Plants were harvested and separated into shoots and roots, oven dried at 65 °C, and grounded into powder for further analysis of sulphur and total aromatic and saturated hydrocarbons, as well as individual aromatic constituents. The pigments of chlorophylls and carotenoids were measured spectrophotometrically in fresh plant leaves. The results indicated that the bioaccumulation of sulphur in plant tissues increased with the increased level of oil contamination. Water analysis showed significant reduction in polyaromatic hydrocarbons. The increase of crude oil contamination resulted in a decrease of chlorophylls and carotenoid content of the plant tissues. The results indicate that the water hyacinth can be used for remediation of water slightly polluted by crude petroleum oil. The presence of magnetite nanoparticles capped with Myrrh resources improved the remediation of water highly polluted by petroleum crude oil.

Catalytic hydrothermal liquefaction of water hyacinth

2015 ◽  
Vol 178 ◽  
pp. 157-165 ◽  
Author(s):  
Rawel Singh ◽  
Bhavya Balagurumurthy ◽  
Aditya Prakash ◽  
Thallada Bhaskar
Keyword(s):  
Water Hyacinth ◽  
Hydrothermal Liquefaction

scholarly journals Analysis of operational issues in hydrothermal liquefaction and supercritical water gasification processes: a review

2021 ◽  
Author(s):  
Niloufar Ghavami ◽  
Karhan Özdenkçi ◽  
Gabriel Salierno ◽  
Margareta Björklund-Sänkiaho ◽  
Cataldo De Blasio
Keyword(s):  
Supercritical Water ◽  
Biomass Conversion ◽  
Hydrothermal Liquefaction ◽  
Production Costs ◽  
Process Conditions ◽  
Operation Conditions ◽  
High Production ◽  
Supercritical Water Gasification ◽  
Operational Issues ◽  
Conversion Technologies

AbstractBiomass is often referred to as a carbon–neutral energy source, and it has a role in reducing fossil fuel depletion. In addition, biomass can be converted efficiently into various forms of biofuels. The biomass conversion processes involve several thermochemical, biochemical, and hydrothermal methods for biomass treatment integration. The most common conversion routes to produce biofuels include pyrolysis and gasification processes. On the other hand, supercritical water gasification (SCWG) and hydrothermal liquefaction (HTL) are best suitable for converting biomass and waste with high moisture content. Despite promising efficiencies, SCWG and HTL processes introduce operational issues as obstacles to the industrialization of these technologies. The issues include process safety aspects due to operation conditions, plugging due to solid deposition, corrosion, pumpability of feedstock, catalyst sintering and deactivation, and high production costs. The methods to address these issues include various reactor configurations to avoid plugging and optimizing process conditions to minimize other issues. However, there are only a few studies investigating the operational issues as the main scope, and reviews are seldomly available in this regard. Therefore, further research is required to address operational problems. This study reviews the main operational problems in SCWG and HTL. The objective of this study is to enhance the industrialization of these processes by investigating the operational issues and the potential solutions, i.e., contributing to the elimination of the obstacles. A comprehensive study on the operational issues provides a holistic overview of the biomass conversion technologies and biorefinery concepts to promote the industrialization of SCWG and HTL.

Influence of process conditions on pretreatment of microalgae for protein extraction and production of biocrude during hydrothermal liquefaction of pretreated Tetraselmis sp.

RSC Advances ◽  
2015 ◽  
Vol 5 (26) ◽  
pp. 20193-20207 ◽  
Author(s):  
B. E. Eboibi ◽  
D. M. Lewis ◽  
P. J. Ashman ◽  
S. Chinnasamy
Keyword(s):  
Protein Extraction ◽  
Direct Conversion ◽  
Hydrothermal Liquefaction ◽  
Process Conditions ◽  
Advanced Biofuels ◽  
Attractive Option

The direct conversion of microalgae to advanced biofuels with hydrothermal liquefaction (HTL) is an attractive option which has drawn attention in recent years.

scholarly journals Lignocellulosic and algal biomass for bio-crude production using hydrothermal liquefaction: Conversion techniques, mechanism and process conditions: A review

2021 ◽  
Vol 27 (1) ◽  
pp. 200555-0
Author(s):  
Chitra Devi Venkatachalam ◽  
Sathish Raam Ravichandran ◽  
Mothil Sengottian
Keyword(s):  
Algal Biomass ◽  
Subcritical Water ◽  
Energy Resource ◽  
Value Added ◽  
Hydrothermal Liquefaction ◽  
Thermochemical Conversion ◽  
Process Conditions ◽  
Operating Parameters ◽  
Bio Oil ◽  
First And Second Generation

Thermochemical conversion is an effective process in production of biocrude. It mainly includes techniques such as torrefaction, liquefaction, gasification and pyrolysis in which Hydrothermal Liquefaction (HTL) has the potential to produce significant energy resource. Algae, one of the third-generation feedstocks is placed in the top order for production of bio-oil compared to the first and second-generation feedstock, as the algae can get multiplied in shorter time with the uptake of greenhouse gases. In HTL, the subcritical water helps the biomass to undergo thermal depolymerisation and produce various chemicals such as nitrogenates, alkanes, phenolics, esters, etc. The produced “biocrude” or “bio-oil” may be further upgraded into value-added chemicals and fuels. In addition, the bio-gas and bio-char are also synthesized as by-products. This review provides an overview of different routes available for thermochemical conversion of biomass. It also provides an insight on the operating parameters such as temperature, pressure, dosage of catalyst and solvent for lignocellulosic and algal biomass under HTL environment. In extent, the article covers the conversion mechanism for these two feedstocks and also the effects of the operating parameters on the yield of biocrude are studied in detail.

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