Recovery of Rare Earth Element Cerium from Spent Automotive Exhaust Catalysts Using a Novel Method

Zhao, Zhexuan; Qiu, Zhaofu; Yang, Ji; Ma, Benteng; Li, Zhen; Xu, Yongye; Cao, Limei; Zhang, Wei

doi:10.1007/s12649-019-00783-x

Cited by 16 publications

(9 citation statements)

References 31 publications

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“…In order to establish the influence of contact time and temperature on the adsorption capacity of functionalized chitosan, 0.1 g of adsorbent material has been weighted over which 25 mL solution with metallic ions content (Pd(II), Ru(III), Pt(IV)) with concentration C0 = 10 mg L −1 was added. In order to establish time influence samples were mixed for different times (15,30,60,120, 180 and 240 min) and at different temperatures (298 K, 308 K and 318 K). All samples were stirred at 200 rot min −1 .…”

Section: Methodsmentioning

confidence: 99%

“…For effective recovery were developed several methods, such as: solvent extraction 8 , ion exchange 9 , membrane separation 2 , 10 , complexation 11 , retention on porous polymers 12 , coprecipitation, sequential distillation, precipitation and adsorption which is presented in the literature as the method with higher efficiency for recovery of PGM’s from aqueous solutions 2 , 4 , 5 , 11 , 13 – 15 .…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, from viewpoint of full utilization of resources it is quite important the effective recovery of PGM's metals from both natural ore and industrial waste. Recovery of such metals from spent systems can represent an efficient way to reduce the dependence on this limited raw material 2,6,7 .For effective recovery were developed several methods, such as: solvent extraction 8 , ion exchange 9 , membrane separation 2,10 , complexation 11 , retention on porous polymers 12 , coprecipitation, sequential distillation, precipitation and adsorption which is presented in the literature as the method with higher efficiency for recovery of PGM's from aqueous solutions 2,4,5,11,[13][14][15] .From all these recovery methods, adsorption seems to be the most suitable method for the recovery of PGM's from diluted solutions, due to low cost and high efficiency 14,[16][17][18][19] . Based on technical and economical points of view a special attention is granted to the materials with good adsorbent properties.…”

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confidence: 99%

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Precious metals recovery from aqueous solutions using a new adsorbent material

Grad

Ciopec

Negrea

et al. 2021

Sci Rep

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Platinum group metals (PGMs) palladium, platinum, and ruthenium represent the key materials for automotive exhaust gas treatment. Since there are no adequate alternatives, the importance of these metals for the automotive industry is steadily rising. The high value of PGMs in spent catalysts justifies their recycling. Therefore, it is really important to recovery platinum group metals from aqueous solutions. Of the many PGMs recovery procedures, adsorption is a process with a good efficiency, but an important role is played by the adsorbent material used into the process. In order to improve the adsorption properties of materials were developed new methods for chemical modification of the solid supports, through functionalization with different extractants. In present paper a new adsorbent material (Chitosan-DB18C6) was used for PGMs recovery. The new adsorbent material was produced by impregnating Chitosan with dibenzo-18-crown-6-ether using Solvent Impregnated Resin (SIR) method. The crown ethers were chosen as extractant due to their known ability to bind metallic ions, whether they are symmetrically or unsymmetrically substituted. In order to determine the PGMs recovery efficiency for new prepared adsorbent material the equilibrium and kinetic studies were performed. Also, to study the PGMs adsorption mechanism the experimental data were modelled using pseudo-first-order and pseudo-second order kinetic models. Experimental data were fitted with three equilibrium isotherm models: Langmuir, Freundlich and Sips. The results proved that new adsorbent material (Chitosan-DB18C6) is an efficient adsorbent for PGMs recovery from aqueous solutions.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Precious metals recovery from aqueous solutions using a new adsorbent material

Grad

Ciopec

Negrea

et al. 2021

Sci Rep

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“…Both pelletised, particulate catalysts and washcoated honeycomb monolith supported catalysts are extensively produced and used in industry. Cost-effective recycling routes have been practiced on such spent catalysts for many years, and more efficient methods continue to be investigated [33,34]. Monolith catalyst structures have many advantages [35] and have shown good performance in POX's short contact time applications to biofuels [36], and power to gas applications [37].…”

Section: Introductionmentioning

confidence: 99%

Autothermal Reforming of Acetic Acid to Hydrogen and Syngas on Ni and Rh Catalysts

et al. 2021

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The autothermal reforming (ATR) of acetic acid (HAc) as a model bio-oil compound is examined via bench scale experiments and equilibrium modelling to produce hydrogen and syngas. This study compares the performance of nickel (Ni-Al, Ni-CaAl) vs. rhodium (Rh-Al) for particulate packed bed (PPB), and of Rh-Al in PPB vs. Rh with and without Ceria for honeycomb monolith (‘M’) catalysts (R-M and RC-M). All PPB and M catalysts used Al2O3 as main support or washcoat, and when not pre-reduced, exhibited good performance with more than 90% of the HAc converted to C1-gases. The maximum H2 yield (6.5 wt.% of feed HAc) was obtained with both the Rh-Al and Ni-CaAl catalysts used in PPB, compared to the equilibrium limit of 7.2 wt.%, although carbon deposition from Ni-CaAl at 13.9 mg gcat−1 h−1 was significantly larger than Rh-Al’s (5.5 mg gcat−1 h−1); close to maximum H2 yields of 6.2 and 6.3 wt.% were obtained for R-M and RC-M respectively. The overall better performance of the Ni-CaAl catalyst over that of the Ni-Al was attributed to the added CaO reducing the acidity of the Al2O3 support, which provided a superior resistance to persistent coke formation. Unlike Rh-Al, the R-M and RC-M exhibited low steam conversions to H2 and CH4, evidencing little activity in water gas shift and methanation. However, the monolith catalysts showed no significant loss of activity, unlike Ni-Al. Both catalytic PPB (small reactor volumes) and monolith structures (ease of flow, strength, and stability) offer different advantages, thus Rh and Ni catalysts with new supports and structures combining these advantages for their suitability to the scale of local biomass resources could help the future sustainable use of biomasses and their bio-oils as storage friendly and energy dense sources of green hydrogen.

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“…In the hydrometallurgical methods the batteries components are leaching in alkaline or acid medium, after machining [17], other stage included in hydrometallurgy methods is the selective separation and concentration from liquid effluent of the valuable metals, REs [6]. Some methods carried out to achieve it are among others, liquid-liquid extraction [18] [19], adsorption [20], bioadsorption [21], ion exchange [14], precipitation [16] [22] [23].…”

mentioning

confidence: 99%

Evaluation of La (III) and Ce(III) Adsorption from Aqueous Solution Using Carbon Nanotubes Adsorbent

Díaz¹,

Escudero²,

López³

2020

Preprint

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Since the 1960s Rare earths (REs) applications gradually have expanded to everyday life. REs have great strategic importance in industrial and technological development, so it is expected an increase in their demand. Among the REs the European Commission considered Cerium and Lanthanum as critical raw materials. This research article studies the adsorption of Ce and La onto two carbon nanomaterials, multiwalled carbon nanotubes (MWCNT) and carboxylic functionalized multiwalled carbon nanotubes (MWCNT_ox). The latter has slightly more affinity for REs than MWCNT. The recovery percentage for Ce were 89 and 98% and in the case of for La were 99 and 92% using 0.8 g of MWCNT and 0.2 g of MWCNT_ox respectively. The adsorption process fits a pseudo second-order kinetic model and the Langmuir isotherm best represented the metal uptake.

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Recovery of Rare Earth Element Cerium from Spent Automotive Exhaust Catalysts Using a Novel Method

Cited by 16 publications

References 31 publications

Precious metals recovery from aqueous solutions using a new adsorbent material

Precious metals recovery from aqueous solutions using a new adsorbent material

Autothermal Reforming of Acetic Acid to Hydrogen and Syngas on Ni and Rh Catalysts

Evaluation of La (III) and Ce(III) Adsorption from Aqueous Solution Using Carbon Nanotubes Adsorbent

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