Catalyst for ultra-low sulfur and aromatic diesel

Tailleur, Roberto Galiasso; Ravigli, Juan; Quenza, Samuel; Valencia, Norma

doi:10.1016/j.apcata.2004.12.014

Cited by 45 publications

(21 citation statements)

References 26 publications

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“…Jedan od značajnih industrijskih primera je primena imobilisanog keramičkog kompozita u procesu biodesumporizacije. Naime, glavni problem u preradi sirove nafte je taj što se veliki deo organskih jedinjenja naftnog sumpora teško odvaja konvencionalnim metodama [36]. Neke organske komponente, kao što su npr.…”

Section: Tabela 4 Osobine Porozne Al2o3 Keramikeunclassified

New eco-composites for biosorbents immobilization: Technological processes and tests

Marković¹,

Zarubica²,

Nikolić³

2014

Savr tehnol

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Konvencionalne metode za prečišćavanje voda karakterišu brojni nedostaci poput nepotpunog uklanjanja metala, visoka cena reagenasa, visoke energetske potrebe, stvaranje toksičnog mulja ili drugih nus proizvoda koji zahtevaju pažljivo rukovanje. Ovi nedostaci su bili imperativ za istraživanje novih ekonomski isplativih, tehnički lako izvodljivih i efikasnijih tretmana otpadnih voda. Biosorpcija je značajna alternativa konvencionalnim sistemima za uklanjanje raznih organskih i neorganskih polutanata iz industrijskih otpadnih voda. Istraživanja u ovom pravcu su doprinela pojavi brojnih biosorbenata na bazi sekundarnih sirovina prehrambene industrije. Razvoj procesa biosorpcije usmerio je dalja istraživanja u pravcu modelovanja regenerativnih biosorbenata i čvrstih, poroznih kompozita za imobilizovanje biomase. Postupci granulisanja i imobilizacije su neka od rešenja kako bi se pomenuti nedostaci prevazišli. U tom smislu, u radu su razmatrani neki novi keramički kompoziti pogodni za imobilizaciju, njihovi tehnološki postupci dobijanja i karakteristike u procesu biosorpcije. Ovi ekološki kompoziti imaju poseban značaj za komercijalnu eksploataciju biosorbenata u procesu prečišćavanja industrijskih, komunalnih ili drugih zagađenih voda.Ključne reči: kompoziti, keramika, biosorbenti, imobilizacija UvodZagađenje životne sredine je često rezultat nekontrolisanog i neracionalnog ispuštanja toksičnih materija iz različitih industrijskih postrojenja ili otpadnih voda u neposrednu okolinu. Industrijske otpadne vode sadrže razne hemijske toksične supstance, organske i neorganske prirode, koje mogu nastati pri eksploataciji mineralnih sirovina, hemijskih sredstava, raznih metalnih kompleksa, sedimentnih i radioaktivnih materija, pesticida, kao i organskih sintetskih boja. Nekontrolisano ispuštanje otpadnih voda u kojima su definisane maksimalne koncentracije zagađujućih materija prekoračene, mogu da izazovu velike negativne promene u ekosistemima. Veliki problem predstavlja i mobilnost nekih zagađujućih materija u životnom staništu, što zavisi od njihovih hemijskih osobina. Ponekad je veoma teško predvideti njihov put i eventualnu mogućnost kontaminacije zemljišta, kao i pitkih podzemnih ili površinskih voda.Ekološki problemi otvorili su mogućnost za razvoj novih, alternativnih materijala i tehnologija za tretman voda zagađenih teškim metalima, sintetskim bojama ili drugim hemijskim organskim supstancama. Potraga za novim tehnologijama uklanjanja toksičnih metala iz otpadnih voda usmerila je pažnju na proces biosorpcije, obzirom na visoki kapacitet vezivanja metala različitim biološkim materijalima. Biosorpcija ima niz prednosti nad konvencionalnim metodama: niski operativni troškovi, visoka efikasnost, minimiziranje hemijskog i biološkog mulja, biosorbenti mogu biti obnovljivi ili otpadni materijali, moguće je ponovno korišćenje biomaterijala (regeneracija biosorbenta), povećana je selektivnost za pojedine metale od interesa, može se primeniti za uklanjanje teških metala iz otpadnih voda, obezbeđuje se ponovno korišćenje metal...

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Section: Tabela 4 Osobine Porozne Al2o3 Keramikeunclassified

New eco-composites for biosorbents immobilization: Technological processes and tests

Marković¹,

Zarubica²,

Nikolić³

2014

Savr tehnol

View full text Add to dashboard Cite

show abstract

“…The concentrations of these compounds are lower in HDS reactivity and are classified as the most refractory compounds in conventional HDS. Therefore, to meet the challenges of producing ultraclean fuels, both investment and operational costs would be rather high due to more severe operating conditions [3][4][5]. The reactivities of the sulfur compounds in hydrodesulfurization process follow the order of thiophenes > 2-methylthiophene(2-MT) > 2,5-dimethylthiophene(2, 5-DMT) > benzothiophene(BT) > DBT > 4-methyldibenzothiophene(4-MDBT) > 4,6-dimethyldibenzothiophene(4,6-DMDBT).…”

Section: Introductionmentioning

confidence: 99%

“…Usually, hydrogen peroxide and TBHP are used as the oxidizing reagents because of its high oxidisability in the ODS process. Various studies of oxidation system on this process have been reported, such as H 2 O 2 / formic acid [13], H 2 O 2 /inorganic solid acids [14], Mo/Al 2 O 3 and H 2 O 2 [8], TBHP/Bi-Mo/Siral [15], CpMo(CO) 3 Cl/H 2 O 2 orTBHP [16], (Me 3 TACN)Mn/TBHP [17], V-Mo/TBHP [18], Mo/Al 2 O 3 /TBHP [19]. Recently, the molecular oxygen has been used as the oxidizing reagent in the ODS process because it is cheap, nonpolluting, not strongly corrosive and commercially available.…”

Section: Introductionmentioning

confidence: 99%

Oxidative desulfurization of diesel with TBHP/isobutyl aldehyde/air oxidation system

et al. 2011

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“…To meet further stringent emission standards stipulated by regulatory organics, ultra-deep removal of sulfur from transportation fuels has become very imperative for the petroleum refining industry. Clean diesel with sulfur content less than 10 lg/g was used in the developed countries and regions such as USA, Japan and EU in recent years (Tailleur et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Enhanced biodesulfurization by magnetic immobilized Rhodococcus erythropolis LSSE8-1-vgb assembled with nano-γ-Al2O3

Zhang

Chen

et al. 2010

World J Microbiol Biotechnol

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Biodesulfurization activity can be enhanced by assembling nano-c-Al 2 O 3 particles on the magnetic immobilized Rhodococcus erythropolis LSSE8-1-vgb. The cells can be collected and reused conveniently by an external magnetic field. Firstly, cells were magnetic immobilized by coating with Fe 3 O 4 nano-particles. The optimal ratio of cells to magnetic Fe 3 O 4 nano-particles was determined to be 50:1 (g/g). Then nano-c-Al 2 O 3 adsorbents were assembled onto the cells to enhance the desulfurization activity. The nano-c-Al 2 O 3 adsorbent had the largest pore volume as well as specific surface area, and the strongest electrostatics interaction with microbial cell, and cells assembled with this nano-adsorbent performed the highest desulfurization activity. The activity of magnetic immobilized cells assembled with adsorbents was tested in desulfurization of model oil. The desulfurization rate was raised by nearly 20% when the amount ratio of magnetic particles to adsorbents was 1:5 (g/g). These cells can be reused. The activity decreased less than 10% through out three desulfurization-activation-reuse recycles.

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Catalyst for ultra-low sulfur and aromatic diesel

Cited by 45 publications

References 26 publications

New eco-composites for biosorbents immobilization: Technological processes and tests

New eco-composites for biosorbents immobilization: Technological processes and tests

Oxidative desulfurization of diesel with TBHP/isobutyl aldehyde/air oxidation system

Enhanced biodesulfurization by magnetic immobilized Rhodococcus erythropolis LSSE8-1-vgb assembled with nano-γ-Al2O3

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