Showing papers by "Sanjoy Banerjee published in 2020"
TL;DR: In this article, asphaltene science had been hindered by many significant uncertainties regarding molecular weight, molecular structure, and nanocolloidal characteristics in laboratory solvents and crud.
Abstract: Previously, asphaltene science had been hindered by many significant uncertainties regarding molecular weight, molecular structure, and nanocolloidal characteristics in laboratory solvents and crud...
95 citations
TL;DR: The synthesis of N-butylimidazolium-functionalized polysulfone (NBI-PSU)-based separators are presented and their ability to selectively transport hydroxide over zincate is evaluated and an improvement in cycle life over control cells containing only the commercial separators is observed.
Abstract: Alkaline zinc-manganese dioxide (Zn-MnO2) batteries are well suited for grid storage applications because of their inherently safe, aqueous electrolyte and established materials supply chain, resulting in low production costs. With recent advances in the development of Cu/Bi-stabilized birnessite cathodes capable of the full 2-electron capacity equivalent of MnO2 (617 mA h/g), there is a need for selective separators that prevent zincate (Zn(OH)4)2- transport from the anode to the cathode during cycling, as this electrode system fails in the presence of dissolved zinc. Herein, we present the synthesis of N-butylimidazolium-functionalized polysulfone (NBI-PSU)-based separators and evaluate their ability to selectively transport hydroxide over zincate. We then examine their impact on the cycling of high depth of discharge Zn/(Cu/Bi-MnO2) batteries when inserted in between the cathode and anode. Initially, we establish our membranes' selectivity by performing zincate and hydroxide diffusion tests, showing a marked improvement in zincate-blocking (DZn (cm2/min): 0.17 ± 0.04 × 10-6 for 50-PSU, our most selective separator vs 2.0 ± 0.8 × 10-6 for Cellophane 350P00 and 5.7 ± 0.8 × 10-6 for Celgard 3501), while maintaining similar crossover rates for hydroxide (DOH (cm2/min): 9.4 ± 0.1 × 10-6 for 50-PSU vs 17 ± 0.5 × 10-6 for Cellophane 350P00 and 6.7 ± 0.6 × 10-6 for Celgard 3501). We then implement our membranes into cells and observe an improvement in cycle life over control cells containing only the commercial separators (cell lifetime extended from 21 to 79 cycles).
17 citations
TL;DR: In this paper, the effect of superficial gas velocity, liquid velocity and gas sparging location on the volume averaged gas fraction, axial and chordal gas fraction profiles, Sauter-mean bubble size, k L a _, and a _ in a downflow bubble column modified to operate via an array of downward pointing micro-jets was investigated.
9 citations
TL;DR: Asphaltene deposition is one of the major flow assurance problems in upstream and downstream crude oil recovery operations as discussed by the authors, in order to prevent potential loss and reduce downtime due to asphaltenes.
Abstract: Asphaltene deposition is one of the major flow assurance problems in upstream and downstream crude oil recovery operations. In order to prevent potential loss and reduce downtime due to asphaltenes...
6 citations
TL;DR: The polydisperse nature of asphaltenes is not usually considered in studies of adsorption effects at interfaces, e.g., water-oil interfaces as mentioned in this paper, and the authors proposed a methodology that take this into account.
Abstract: The polydisperse nature of asphaltenes is not usually considered in studies of asphaltenes adsorption effects at interfaces, e.g., water–oil interfaces. We recently proposed a methodology that take...
4 citations
Patent•
09 Apr 2020
TL;DR: A metallic electrode comprises an electroactive material comprising zinc, aluminum, lithium, magnesium, silver, brass, copper, stainless steel, nickel, selenium, or any combination thereof as discussed by the authors.
Abstract: A metallic electrode comprises an electroactive material comprising zinc, aluminum, lithium, magnesium, silver, brass, copper, stainless steel, nickel, selenium, or any combination thereof, and an additive comprising a metal selected from the group consisting of bismuth, copper, indium, a salt thereof, an oxide thereof, and any combination thereof. The additive is plated in a layer on the electroactive material.
1 citations
1 citations