Search Results - "Konwar, Lakhya Jyoti"

Review on latest developments in biodiesel production using carbon-based catalysts by Konwar, Lakhya Jyoti, Boro, Jutika, Deka, Dhanapati

“…Catalyst plays an important role in biodiesel production. Owing to the advantages of heterogeneous catalysts in terms of separation and reusability over the…”
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SO3H‑Containing Functional Carbon Materials: Synthesis, Structure, and Acid Catalysis by Konwar, Lakhya Jyoti, Mäki-Arvela, Päivi, Mikkola, Jyri-Pekka

“…The “sulfonated carbons” are a new class of metal-free solid protonic acids characterized by their unique carbon structure and Brønsted acidity (−H 0 = 8–11)…”
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Renewable N-doped active carbons as efficient catalysts for direct synthesis of cyclic carbonates from epoxides and CO2 by Samikannu, Ajaikumar, Konwar, Lakhya Jyoti, Mäki-Arvela, Päivi, Mikkola, Jyri-Pekka

“…[Display omitted] •Direct carbonation epoxides with CO2 using N-doped carbons.•Activity originates from pyridinic, pyridonic, and quaternary…”
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Transesterification of non edible feedstock with lithium incorporated egg shell derived CaO for biodiesel production by BORO, Jutika, LAKHYA JYOTI KONWAR, DEKA, Dhanapati

“…A series of Li doped egg shell derived CaO is prepared for biodiesel production from nonedible oil feedstock. The catalyst is characterized by X-ray…”
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Ba doped CaO derived from waste shells of T striatula (TS-CaO) as heterogeneous catalyst for biodiesel production by BORO, Jutika, LAKHYA JYOTI KONWAR, ASHIM JYOTI THAKUR, DEKA, Dhanapati

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Hybrid biofuels from non-edible oils: A comparative standpoint with corresponding biodiesel by Bora, Plaban, Konwar, Lakhya Jyoti, Boro, Jutika, Phukan, Mayur Mausoom, Deka, Dhanapati, Konwar, Bolin Kumar

“…[Display omitted] •Non-edible oil based hybrid biofuels.•Natural surfactant based hybrid fuel systems (FFA, mono, diglycerides).•Improved cold flow properties…”
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Carbon support effects on metal (Pd, Pt and Ru) catalyzed hydrothermal decarboxylation/deoxygenation of triglycerides by Konwar, Lakhya Jyoti, Mikkola, Jyri-Pekka

“…Herein, we show that textural properties of carbon supports have limited influence on the activity and stability of carbon supported Pd, Pt and Ru catalysts…”
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Ru/N-doped activated carbon/NbOPO4 composites as an efficient bi-functional catalyst for direct hydrolytic hydrogenation of cellobiose to sorbitol by Mani, Mariappan, Konwar, Lakhya Jyoti

“…Ru/N-doped activated carbon/NbOPO 4 material bearing unique surface chemistry (Brønsted acidic NbOPO 4 , Lewis basic N-groups and oxygen functional groups) is…”
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Towards carbon efficient biorefining: Multifunctional mesoporous solid acids obtained from biodiesel production wastes for biomass conversion by Konwar, Lakhya Jyoti, Mäki-Arvela, Päivi, Salminen, Eero, Kumar, Narendra, Thakur, Ashim Jyoti, Mikkola, Jyri-Pekka, Deka, Dhanapati

“…[Display omitted] •Valorization solid wastes from biodiesel production process to solid acids.•Characterization explaining the catalyst structure, stability…”
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Highly dispersed NbOPO4/SBA-15 as a versatile acid catalyst upon production of renewable jet-fuel from bio-based furanics via hydroxyalkylation-alkylation (HAA) and hydrodeoxygenation (HDO) reactions by Samikannu, Ajaikumar, Konwar, Lakhya Jyoti, Rajendran, Kishore, Lee, Cheng Choo, Shchukarev, Andrey, Virtanen, Pasi, Mikkola, Jyri-Pekka

“…•H3PO4-free deposition technique to obtain highly dispersed and active Brønsted acidic NbOPO4/SBA-15 materials.•Synthesis of renewable jet-fuel components from…”
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Lignosulfonate-based macro/mesoporous solid protonic acids for acetalization of glycerol to bio-additives by Konwar, Lakhya Jyoti, Samikannu, Ajaikumar, Mäki-Arvela, Päivi, Boström, Dan, Mikkola, Jyri-Pekka

“…[Display omitted] •Mesoporous solid acids (sulfonated carbons) were obtained from Na-Lignosulfonate by mild pyrolysis and H+ exchanging.•No need of sulfonation…”
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SO 3 H-Containing Functional Carbon Materials: Synthesis, Structure, and Acid Catalysis by Konwar, Lakhya Jyoti, Mäki-Arvela, Päivi, Mikkola, Jyri-Pekka

“…The "sulfonated carbons" are a new class of metal-free solid protonic acids characterized by their unique carbon structure and Brønsted acidity (- = 8-11) on…”
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Continuous hydrocyclization of aqueous levulinic acid to γ-valerolactone over bi-functional Ru/NbOPO4/SBA-15 catalyst under mild conditions by Mani, Mariappan, Mariyaselvakumar, Mariyamuthu, Samikannu, Ajaikumar, Panda, Asit Baran, Konwar, Lakhya Jyoti, Mikkola, Jyri-Pekka

“…Herein, we demonstrate that surface acid-base properties have marked effect upon the performance (activity, selectivity and stability) of supported Ru…”
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Halogenated melamine formaldehyde polymers: Efficient, robust and cost-effective bifunctional catalysts for continuous production of cyclic carbonates via. CO 2 -epoxide cycloaddition by Mariyaselvakumar, Mariyamuthu, Kadam, Ganesh Govind, Saha, Anusuya, Samikannu, Ajaikumar, Mikkola, Jyri-Pekka, Ganguly, Biswajit, Srinivasan, Kannan, Konwar, Lakhya Jyoti

“…Halogenated porous melamine polymers were demonstrated as an efficient catalyst for CO2-epoxide cycloaddition, selectively (>99%) producing C3-C12 cyclic…”
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Reaction kinetics with catalyst deactivation in simultaneous esterification and transesterification of acid oils to biodiesel (FAME) over a mesoporous sulphonated carbon catalyst by Konwar, Lakhya Jyoti, Wärnå, Johan, Mäki-Arvela, Päivi, Kumar, Narendra, Mikkola, Jyri-Pekka

“…[Display omitted] •Kinetics of simultaneous esterification and transesterification of natural acid oils.•The composition of feedstock influences the methanol…”
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Mesoporous Melamine-Formaldehyde Resins as Efficient Heterogeneous Catalysts for Continuous Synthesis of Cyclic Carbonates from Epoxides and Gaseous CO2 by Bui, Thai Q, Konwar, Lakhya Jyoti, Samikannu, Ajaikumar, Nikjoo, Dariush, Mikkola, Jyri-Pekka

“…Herein, we report the application of inexpensive mesoporous melamine-formaldehyde resins (MMFR and MMFR250) obtained by a novel template-free and…”
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Halogenated melamine formaldehyde polymers: Efficient, robust and cost-effective bifunctional catalysts for continuous production of cyclic carbonates via. CO2-epoxide cycloaddition by Mariyaselvakumar, Mariyamuthu, Kadam, Ganesh Govind, Saha, Anusuya, Samikannu, Ajaikumar, Mikkola, Jyri-Pekka, Ganguly, Biswajit, Srinivasan, Kannan, Konwar, Lakhya Jyoti

“…Halogenated porous melamine polymers were demonstrated to be efficient catalysts for CO2-epoxide cycloaddition, selectively (>99%) producing C3-C12 cyclic…”
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Biodiesel production from acid oils using sulfonated carbon catalyst derived from oil-cake waste by Konwar, Lakhya Jyoti, Das, Rupali, Thakur, Ashim Jyoti, Salminen, Eero, Mäki-Arvela, Päivi, Kumar, Narendra, Mikkola, Jyri-Pekka, Deka, Dhanapati

“…•Sulfonated carbons were prepared from oil-cake waste; a by-product from biodiesel production.•Carbon catalyst with high surface area and acid site density…”
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Shape selectivity and acidity effects in glycerol acetylation with acetic anhydride: Selective synthesis of triacetin over Y-zeolite and sulfonated mesoporous carbons by Konwar, Lakhya Jyoti, Mäki-Arvela, Päivi, Begum, Pakiza, Kumar, Narendra, Thakur, Ashim Jyoti, Mikkola, Jyri-Pekka, Deka, Ramesh Chandra, Deka, Dhanapati

“…[Display omitted] •Selective synthesis of triacetin from glycerol and acetic anhydride.•Product selectivity determined by catalyst pore size and surface acid…”
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Formulation of microemulsion based hybrid biofuel from waste cooking oil – A comparative study with biodiesel by Bora, Plaban, Boro, Jutika, Konwar, Lakhya Jyoti, Deka, Dhanapati

“…This investigation highlights the feasibility of microemulsion based hybrid biofuel from waste cooking oil (WCO) as an alternative to petro diesel. In this…”
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