Renewable boronic acid affiliated glycerol nano-adsorbents for recycling enzymatic catalyst in biodiesel fuel production

2018 ◽  
Vol 54 (88) ◽  
pp. 12475-12478 ◽  
Author(s):  
Lei Liu ◽  
Gaojian Ma ◽  
Min Zeng ◽  
Wei Du ◽  
Jinying Yuan
Keyword(s):  
Silica Nanoparticles ◽  
Boronic Acid ◽  
Biodiesel Production ◽  
Biodiesel Fuel ◽  
Release Behavior ◽  
Ph Responsive ◽  
Fuel Production ◽  
Enzymatic Catalyst

Renewable boronic acid affiliated silica nanoparticles exhibit pH-responsive glycerol adsorption/release behavior to recycle free lipases in biodiesel production.

scholarly journals High-Efficiency Ukrainian Strains of Microalgae for Biodiesel Fuel Production (Overview)

2020 ◽  
Vol 14 (1) ◽  
pp. 209-218
Author(s):  
Petro M. Tsarenko ◽  
Olena V. Borysova ◽  
Vitaly I. Korkhovyi ◽  
Yaroslav B. Blume
Keyword(s):  
Fatty Acid ◽  
High Efficiency ◽  
Biomass Productivity ◽  
Culture Collection ◽  
Climatic Conditions ◽  
Biodiesel Production ◽  
Biodiesel Fuel ◽  
Fatty Acid Profiles ◽  
Fuel Production ◽  
Microalgae Culture

Background: In Ukraine, the research works focused on the study of green microalgae as an alternative source of feedstock for biodiesel production started in 2009. The screening of the Ukrainian Microalgae Culture Collection (IBASU-A) revealed a number of promising strains of species belonging to Chlorella, Chloroidium, Desmodesmus, and Parachlorella (Chlorellaceae and Scenedesmaceae) genera. The main criteria for strain selection were: accumulation of a significant volume of lipids, high kinetic characteristics (specific growth rate and productivity), resistance to stresses and biological contaminations. Some novel algal strains with relevant properties and optimized to the local climatic conditions were also isolated from different regions of Ukraine. Biotechnological studies showed a rather high potential of many of them, especially those of species from Tetradesmus and Desmodesmus (Scenedesmaceae) genera. Recently, some strains of species belonging to Monoraphidium, Raphidocelis, and Selenastrum (Selenastraceae) genera have also been isolated and the search for strains with a high biomass production continued. Objective: Moving from an overview of the oleaginous high-efficiency strains present in the largest algal collection in Ukraine (IBASU-A) and a critical analysis of problems related to biodiesel fuel production by microalgae, here we report preliminary data on biomass productivity, lipid amount and fatty acid profiles of some Ukrainian strains of Selenastraceae family. Methods: Traditional techniques were used for the isolation of new strains. The study of growth characteristics was carried out under intensive conditions and the daily increase of algal biomass was determined by the gravimetrical method. The data obtained on growth characteristics were compared with those of the well-known producers of biomass. The fatty acid composition in the most promising strains was determined by the gas-liquid chromatography. Results: Three new algal strains, M. minutum IBASU-A 574, Monoraphidium sp. IBASU-A 377 and Raphidocelis subcapitata IBASU-A 358, of Selenastraceae, adapted to regional climatic conditions, were isolated from different regions of Ukraine. They showed a higher efficiency in biodiesel production with respect to strains of Chlorellaceae and Scenedesmaceae earlier investigated. The biomass productivity of M. minutum IBASU-A 574, Monoraphidium sp. IBASU-A 377 and Raphidocelis subcapitata IBASU-A 358 was 1.84, 0.84 and 1.32 g DW L-1·day-1, while the lipid contents were 33.65%, 29.43% and 23.14%, respectively. Their fatty acid profiles included mainly C16:0, C18:2 and C18:3, all of interest for biodiesel production. Conclusion: The Ukrainian Microalgae Culture Collection has been supplemented with strains of species from family Selenastraceae showing high-efficiency for biodiesel production and adaptation to local environmental conditions.

Estimation of Recoverable Household Waste Cooking Oil and Life Cycle Analysis of Biodiesel Fuel Production

2008 ◽  
Vol 4 (4) ◽  
pp. 318-323 ◽  
Author(s):  
Hirotsugu KAMAHARA ◽  
Shun YAMAGUCHI ◽  
Ryuichi TACHIBANA ◽  
Naohiro GOTO ◽  
Koichi FUJIE
Keyword(s):  
Life Cycle ◽  
Life Cycle Analysis ◽  
Waste Cooking Oil ◽  
Household Waste ◽  
Biodiesel Fuel ◽  
Fuel Production ◽  
Cooking Oil

scholarly journals Lipase Immobilization in Mesoporous Silica Nanoparticles for Biofuel Production

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 629
Author(s):  
Aniello Costantini ◽  
Valeria Califano
Keyword(s):  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Mechanical Stability ◽  
Mesoporous Silica Nanoparticles ◽  
Physiological Role ◽  
Biodiesel Production ◽  
Biofuel Production ◽  
Hydroxyl Groups ◽  
Lipase Immobilization ◽  
Wide Range

Lipases are ubiquitous enzymes whose physiological role is the hydrolysis of triacylglycerol into fatty acids. They are the most studied and industrially interesting enzymes, thanks to their versatility to promote a plethora of reactions on a wide range of substrates. In fact, depending on the reaction conditions, they can also catalyze synthesis reactions, such as esterification, acidolysis and transesterification. The latter is particularly important for biodiesel production. Biodiesel can be produced from animal fats or vegetable oils and is considered as a biodegradable, non-toxic and renewable energy source. The use of lipases as industrial catalysts is subordinated to their immobilization on insoluble supports, to allow multiple uses and use in continuous processes, but also to stabilize the enzyme, intrinsically prone to denaturation with consequent loss of activity. Among the materials that can be used for lipase immobilization, mesoporous silica nanoparticles represent a good choice due to the combination of thermal and mechanical stability with controlled textural characteristics. Moreover, the presence of abundant surface hydroxyl groups allows for easy chemical surface functionalization. This latter aspect has the main importance since lipases have a high affinity with hydrophobic supports. The objective of this work is to provide an overview of the recent progress of lipase immobilization in mesoporous silica nanoparticles with a focus on biodiesel production.

Pollen-like silica nanoparticles as a nanocarrier for tumor targeted and pH-responsive drug delivery

Talanta ◽  
2021 ◽  
Vol 231 ◽  
pp. 122402
Author(s):  
Rongrong Jin ◽  
Jiaxi Wang ◽  
Mingxia Gao ◽  
Xiangmin Zhang
Keyword(s):  
Drug Delivery ◽  
Silica Nanoparticles ◽  
Ph Responsive

scholarly journals Preparation and Swelling Behaviors of High-Strength Hemicellulose-g-Polydopamine Composite Hydrogels

Materials ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 186
Author(s):  
Jiayan Ge ◽  
Kaiqi Gu ◽  
Kewen Sun ◽  
Xinyue Wang ◽  
Shuangquan Yao ◽  
...  
Keyword(s):  
Water Retention ◽  
High Strength ◽  
Release Behavior ◽  
Ph Responsive ◽  
Composite Hydrogels ◽  
Hydrogel Network ◽  
Microsphere Size ◽  
Chemical Cross Linking ◽  
Swelling Behaviors ◽  
Good Water Retention

Hemicellulose-based composite hydrogels were successfully prepared by adding polydopamine (PDA) microspheres as reinforcing agents. The effects of PDA microsphere size, dosage, and nitrogen content in hydrogel on the mechanical and rheological properties was studied. The compressive strength of hydrogel was increased from 0.11 to 0.30 MPa. The storage modulus G’ was increased from 7.9 to 22.0 KPa. The gaps in the hemicellulose network are filled with PDA microspheres. There is also chemical cross-linking between them. These gaps increased the density of the hydrogel network structure. It also has good water retention and pH sensitivity. The maximum cumulative release rate of methylene blue was 62.82%. The results showed that the release behavior of hydrogel was pH-responsive, which was beneficial to realizing targeted and controlling drug release.

pH-responsive release system of topiramate transported on silica nanoparticles by melting method

2020 ◽  
pp. 1-20
Author(s):  
Janiele Mayara Ferreira de Almeida ◽  
Elmar Damasceno Júnior ◽  
Elania Maria Fernandes Silva ◽  
Lourena Mafra Veríssimo ◽  
Nedja Suely Fernandes
Keyword(s):  
Silica Nanoparticles ◽  
Ph Responsive ◽  
Melting Method ◽  
Release System

The Optimization of Biodiesel Fuel Production from Microalgae Oil Using Response Surface Methodology

2013 ◽  
Vol 11 (5) ◽  
pp. 527-541 ◽  
Author(s):  
Violeta Makareviciene ◽  
Virginija Skorupskaite ◽  
Donatas Levisauskas ◽  
Vaida Andruleviciute ◽  
Kiril Kazancev
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Biodiesel Fuel ◽  
Fuel Production ◽  
Microalgae Oil

scholarly journals Biodiesel fuel production via transesterification of oils using lipase biocatalyst

GCB Bioenergy ◽  
2009 ◽  
Vol 1 (2) ◽  
pp. 115-125 ◽  
Author(s):  
MAN XIAO ◽  
SINI MATHEW ◽  
JEFFREY PHILIP OBBARD
Keyword(s):  
Biodiesel Fuel ◽  
Fuel Production
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