Bioleaching of vanadium rich spent refinery catalysts using sulfur oxidizing lithotrophs

Mishra, Dhaneshwar; Kim, Dong J.; Ralph, D.E.; Ahn, Jong Gwan; Rhee, Young Ha

doi:10.1016/j.hydromet.2007.05.007

Cited by 118 publications

(47 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Beolchini et al (2010) reported yields for the microbial leaching of Mo from spent HDS catalysts of below 30% after 20 days of contact. The results reported herein are consistent with those reported by Mishra et al (2007), who studied different pulp densities (5 g/L to 50 g/L) and obtained the maximum value for Mo recovery (71.1%) in the tests conducted with 5 g/L of catalyst in a two-stage process with 7 days of incubation. For a pulp density of 50 g/L, a recovery of 21.5% was observed.…”

Section: Indirect Microbial Leachingsupporting

confidence: 92%

“…The cell concentration remained almost unaltered, reaching 3.1 x 10 6 cells/mL, with a pulp density of 10 g/L, while slightly lower cell concentrations were observed for the other catalyst densities. Mishra et al (2007) carried out studies on the bioleaching of metals by A. thiooxidans, with previously adapted cells, and observed cell growth up to a pulp density of 20 g/L; however, the catalyst used had been submitted to thermal pretreatment (750 ºC for 2 h). Thermally or chemically pretreated catalysts were not used in this study and the bacterial strain was not previously adapted to the contaminants (organics or metals).…”

Section: Effect Of the Catalyst Density And A Thiooxidans Fg-01 Actimentioning

confidence: 99%

“…In contrast to chemical processes, biotechnological processes do not require high temperatures and pressures and they can therefore be more economically attractive. In this regard, several species of microorganisms which produce acids have been studied as heavy metal leaching agents, the most cited being of the genera Acidithiobacillus and Aspergillus (Thosar et al, 2014;Asghari et al, 2013;Bharadwaj and Ting, 2013;Mishra et al, 2008, Mishra et al, 2007. Recent publications in the literature report the microbial recovery of metals contained in spent catalysts from petroleum refining, pretreated through washing with solvents, thermal treatment and grinding or sieving (Srichandan et al, 2014a, Thosar et al, 2014Noori Felegri et al, 2014;Bharadwaj and Ting, 2013).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

BIOLEACHING OF METALS FROM A SPENT DIESEL HYDRODESULFURIZATION CATALYST EMPLOYING Acidithiobacillus thiooxidans FG-01

Ferreira

Sérvulo

Costa

et al. 2017

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

-This study evaluates the recovery of heavy metals employing a spent catalyst from the hydrodesulfurization (HDS) of diesel, with no chemical, thermal or physical pretreatment, using the bacterial strain Acidithiobacillus thiooxidans FG-01. Direct and indirect bioleaching tests were carried out in Erlenmeyer flasks (500 mL). The influence of the pulp density and supplementation with elemental sulfur on the bioleaching were also investigated. The spent catalyst contained organochlorines, petroleum hydrocarbons and heavy metals in its composition. The best recovery results (26% Al, 26% V and 39% Mo) were achieved in the two-stage (indirect) bioprocess, with a pulp density of 50 g/L. It was not possible to recover Co, Cu and Ni (< 5%) under any of the conditions tested. The bacterial strain A. thiooxidans FG-01 was found to be a promising candidate for the recovery of Al, V and Mo using the crude spent HDS catalyst.

show abstract

Section: Indirect Microbial Leachingsupporting

confidence: 92%

Section: Effect Of the Catalyst Density And A Thiooxidans Fg-01 Actimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

BIOLEACHING OF METALS FROM A SPENT DIESEL HYDRODESULFURIZATION CATALYST EMPLOYING Acidithiobacillus thiooxidans FG-01

Ferreira

Sérvulo

Costa

et al. 2017

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…1) Owing to the environmental concern and the increasing demand for valuable metals (particularly molybdenum and cobalt) in many technological fields, spent catalysts have been recognized as a secondary source for the recovery of molybdenum, cobalt, nickel and vanadium. A number of processes, such as acid leaching, 27) caustic leaching 8,9) and bio-leaching, 10) have been developed to treat the spent catalyst. Among these processes, acid leaching can dissolve all of the valuable metals in spent catalysts.…”

Section: Introductionmentioning

confidence: 99%

Separation of Mo from Chloride Leach Liquors of Petroleum Refining Catalysts by Ion Exchange

2013

View full text Add to dashboard Cite

Separation of molybdenum from the synthetic chloride leach liquors of spent hydrodesulphurization catalysts was studied by employing cationic (Diphonix) and anionic resins (AG1-x8). The composition of the solution was Mo 394 ppm, Co 119 ppm and Al 1782 ppm. In the HCl concentration range from 1 to 6 kmol/m 3 , the loading of Co and Al was negligible. As the concentration of HCl increased, the loading percentage of Mo by AG1-x8 increased, while that by Diphonix decreased. The Mo in the loaded AG1-x8 was successfully eluted by using NaOH solution. In terms of the possibility of producing Mo compound from the eluant, AG1-x8 was found to be better than Diphonix. The loading capacity of AG1-x8 for molybdenum was determined. Column experiments verified that it was possible to separate Mo from Co and Al by ion exchange with AG1-x8.

show abstract

“…Our previous work has shown that the application of sulphur oxidizing lithotrophic cells can dissolve appreciable amount of Ni and V from spent refinery catalysts. 8,9) Several other reports have been published using fungi (Aspergillus niger) to recover metals from spent fluid cracking catalysts. 10,11) Since microbiological catalysis to recover metals is cost effective and eco-friendly, its application to treat different solid wastes has advantages compared with hydro-pyro metallurgical methods.…”

Section: Introductionmentioning

confidence: 99%

Metal Leaching from Spent Petroleum Catalyst by Acidophilic Bacteria in Presence of Pyrite

et al. 2008

Self Cite

View full text Add to dashboard Cite

This paper describes studies on the recovery of metals from spent hydro-processing catalyst using mixed acidophilic culture in presence of pyrite. This culture was initially grown in the 9KÀ medium (absence of 9 g/L Fe(II)) where ferrous sulphate (FeSO 4 ) was replaced by pyrite, and then applied in this bioleaching study. Bacterial action on pyrite catalysed the formation of ferric ion (Fe þ3 ), proton (H þ ) and sulphate ions (SO 4 À2 ) in the solution which leached metals (Ni, Mo and V) from the spent catalyst. Experiments were conducted by varying the reaction time, amount of spent catalyst and pyrite, and temperature. After 7 days with 30 g/L of spent catalyst and 50 g/L of pyrite, the leaching of Ni, V and Mo into the solution was 85, 92 and 26%, respectively. With increasing spent catalyst loading, the extent of metal dissolution was decreased, probably due to the precipitation of Fe þ3 as a residue. Under all conditions tested, Mo showed recovery due to its precipitation with leach residues as MoO 3 observed by applying EDAX and XRD techniques to the leach residues.

show abstract

Bioleaching of vanadium rich spent refinery catalysts using sulfur oxidizing lithotrophs

Cited by 118 publications

References 13 publications

BIOLEACHING OF METALS FROM A SPENT DIESEL HYDRODESULFURIZATION CATALYST EMPLOYING Acidithiobacillus thiooxidans FG-01

BIOLEACHING OF METALS FROM A SPENT DIESEL HYDRODESULFURIZATION CATALYST EMPLOYING Acidithiobacillus thiooxidans FG-01

Separation of Mo from Chloride Leach Liquors of Petroleum Refining Catalysts by Ion Exchange

Metal Leaching from Spent Petroleum Catalyst by Acidophilic Bacteria in Presence of Pyrite

Contact Info

Product

Resources

About