Catalytic effect of tin oxide nanoparticles on cellulose pyrolysis

Donar, Yusuf Osman; Sınağ, Ali

doi:10.1016/j.jaap.2016.03.016

Cited by 27 publications

(9 citation statements)

References 43 publications

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“…[20,21] The crystal size of TiO 2 samples is 10.32 nm calculated from the Scherrer equation. [22] CNT-TiO 2 and C 60 -TiO 2 composites exhibit similarp eaks as given by Yang et al [23] SEM and TEM images of the new photocatalyst and s-TiO 2 are shown in Figure 2. SEM and TEM images reveal the porous structurea nd tetragonal morphologyw ith an average particle size between 50 microns and 8-10 nm.…”

Section: Resultssupporting

confidence: 73%

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TiO₂/Carbon Materials Derived from Hydrothermal Carbonization of Waste Biomass: A Highly Efficient, Low‐Cost Visible‐Light‐Driven Photocatalyst

et al. 2018

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In this paper, we present a green, low‐cost carbon material derived from waste biomass (hazelnut shell (HS) and olive residue (OR)) to fabricate a binary TiO2/carbon composite for improving the photocatalytic performance of TiO2 under visible light. The synthesis, characterization, and photocatalytic applications of the TiO2/carbon composite were performed. Hydrothermal carbonization was used to obtain the carbon support materials. A series of TiO2/carbon composite materials from waste biomass based on hydrochar, fullerene, and carbon nanotubes has been prepared for comparison purposes. Photocatalytic performances of all composites were measured by comparing methylene blue (MB) removal rates. The results show that waste biomass based hydrochar/TiO2 composites possessed superior visible‐light photocatalytic activity compared with high technology carbons/TiO2 composites such as fullerene and carbon nanotubes. The enhanced photodegradation capacity could be ascribed to the delocalized furanic conjugated system and functional groups of HS‐TiO2 and OR‐TiO2 composites.

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Section: Resultssupporting

confidence: 73%

“…21‐1272), whereas no apparent peaks for HS and OR can be observed, which may be owing to the small content of the carbon materials in those nanocomposites . The crystal size of TiO 2 samples is 10.32 nm calculated from the Scherrer equation . CNT‐TiO 2 and C 60 ‐TiO 2 composites exhibit similar peaks as given by Yang et al …”

Section: Resultssupporting

confidence: 55%

TiO₂/Carbon Materials Derived from Hydrothermal Carbonization of Waste Biomass: A Highly Efficient, Low‐Cost Visible‐Light‐Driven Photocatalyst

et al. 2018

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“…Similar to the HZSM-5 catalyst, the FRM-catalyzed pyrolysis produced more PNCG (34.5 wt %) than the noncatalytic one (29.7 wt %). The catalytic pyrolysis of CE using acidic catalysts, − , metal oxides, − and basic catalysts such as alkali and alkaline earth metal oxide ,− , is well-known to produce more PNCG than the nonpyrolytic pyrolysis due to catalytic cracking of the pyrolysis vapors. Compared to the noncatalytic pyrolysis, the FRM produced 5.3% more organic liquid, whereas the HZSM-5 catalyst produced 83.0% less organic liquids.…”

Section: Resultsmentioning

confidence: 99%

“…Understanding the mechanisms involved during the pyrolysis of cellulose is necessary to identify the origin of some of the chemicals present in the lignocellulose pyrolysis biooil. Numerous studies investigated the catalytic pyrolysis of cellulose using two types of catalysts: (1) acidic catalysts such as zeolites, − metal oxides, − and carbonaceous acids − and (2) basic catalysts such as alkali and alkaline earth metal oxides ,,− and metal chlorides. − The acidic catalysts promoted the formation of aromatic compounds, which improved the fuel properties of the biooil. The basic catalyst promoted the formation of high-value chemicals that can be used as building blocks for other commercial chemicals.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Pyrolysis of Cellulose Using Formulated Red Mud, Sand, and HZSM-5

Abdellaoui,

Agblevor,

Haghighi Mood

2023

Energy Fuels

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The catalytic pyrolysis of microcrystalline cellulose (CE) using formulated red mud (FRM) and HZSM-5 catalysts was conducted in a fluidized bed reactor at 400 °C. Both catalysts promoted the conversion of CE. The FRM promoted the formation of organic liquids and pyrolytic water, while the HZSM-5 catalyst promoted the pyrolytic water and the formation of pyrolysis noncondensable gases (PNCGs). The electrostatic precipitator (ESP) biooil (25.8 ± 2.54 wt %) from the CE-FRM consisted mainly of levoglucosan (LGA, 68.60 area %), cyclic ketones (CKs, 2.91 area%), and aromatics (1.38 area%), whereas the HZSM-5 biooil consisted of levoglucosan (82.27 area%). The major oxides of the FRM (i.e., Al 2 O 3 and Fe 2 O 3 ) were used during the pyrolysis of CE. Both catalysts promoted the formation of pyrolytic water and PNCGs. Compared to sand, the Fe 2 O 3 promoted the formation of anhydrous sugars by about 6%, aromatics by more than 3-fold and CKs by more than 2-fold, whereas the Al 2 O 3 promoted the formation of noncyclic oxygenates (NCOs) by more than 3-fold, furans by more than 3-fold, CKs by more than 5-fold, and aromatics by more than 28-fold. During the CE-FRM pyrolysis, larger particle size resulted in higher char/coke and pyrolytic water yields and lower organic liquid and PNCGs. This was due to the longer residence time of LGA in the larger particles where further dehydration and charring occur. The pyrolysis of D-glucose (DG) over the FRM catalyst resulted in higher char/coke and water yields and lower organic liquid and PNCGs compared to the catalytic pyrolysis of CE over FRM. Compared to the CE-FRM biooil, the DG-FRM biooil had higher furans content and lower yields of anhydrous sugars and aromatics. The longer residence time of LGA produced during the DG-FRM pyrolysis in the hot zone resulted in its further dehydration and polymerization to form char.

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“…Autori turpināja pētījumus par nanopulveru (TiO2, Al2O3 un AlTi) ietekmi celulozes pirolīzes procesā ar mērķi iegūt hirālos hidroksilaktonus, vislielākā efektivitāte bija nano-AlTi katalizatoram. Pētīti ir arī SnO2 un TiO2 nanopulveri, Donar ar līdzautoru[211] veica celulozes pirolīzi SnO2 klātbūtnē 700 °C temperatūrā un noskaidroja, ka SnO2 veicināja gaistošo savienojumu veidošanos un samazināja cieto atlikumu. SnO2 ietekmē samazinājās karbonilgrupu saturošo savienojumu veidošanās un novēroja intensīvu metāna izdalīšanos.…”

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Promocijas darbs ķīmijas doktora zinātniskā grāda iegūšanai tiek publiski aizstāvēts 2019. gada 7. februārī Rīgas Tehniskās universitātes Materiālzinātnes un lietišķās ķīmijas fakultātē, Paula Valdena ielā 3, 272. auditorijā. OFICIĀLIE RECENZENTI Dr. sc. ing. Aivars Žūriņš, Latvijas Valsts koksnes ķīmijas institūts Dr. habil. chem. Gaļina Dobele, Latvijas Valsts koksnes ķīmijas institūts Dr. phys. Jānis Kalnačs, Fizikālās enerģētikas institūts APSTIPRINĀJUMS Apstiprinu, ka esmu izstrādājusi šo promocijas darbu, kas iesniegts izskatīšanai Rīgas Tehniskajā universitātē ķīmijas doktora zinātniskā grāda iegūšanai. Promocijas darbs zinātniskā grāda iegūšanai nav iesniegts nevienā citā universitātē.

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Catalytic effect of tin oxide nanoparticles on cellulose pyrolysis

Cited by 27 publications

References 43 publications

TiO₂/Carbon Materials Derived from Hydrothermal Carbonization of Waste Biomass: A Highly Efficient, Low‐Cost Visible‐Light‐Driven Photocatalyst

TiO₂/Carbon Materials Derived from Hydrothermal Carbonization of Waste Biomass: A Highly Efficient, Low‐Cost Visible‐Light‐Driven Photocatalyst

Catalytic Pyrolysis of Cellulose Using Formulated Red Mud, Sand, and HZSM-5

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Catalytic effect of tin oxide nanoparticles on cellulose pyrolysis

Cited by 27 publications

References 43 publications

TiO2/Carbon Materials Derived from Hydrothermal Carbonization of Waste Biomass: A Highly Efficient, Low‐Cost Visible‐Light‐Driven Photocatalyst

TiO2/Carbon Materials Derived from Hydrothermal Carbonization of Waste Biomass: A Highly Efficient, Low‐Cost Visible‐Light‐Driven Photocatalyst

Catalytic Pyrolysis of Cellulose Using Formulated Red Mud, Sand, and HZSM-5

Graudkopības atlikumu vidēji ātrā pirolīze

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TiO₂/Carbon Materials Derived from Hydrothermal Carbonization of Waste Biomass: A Highly Efficient, Low‐Cost Visible‐Light‐Driven Photocatalyst

TiO₂/Carbon Materials Derived from Hydrothermal Carbonization of Waste Biomass: A Highly Efficient, Low‐Cost Visible‐Light‐Driven Photocatalyst