A zeolite based vapor phase adsorptive desulfurization process for naphtha

Nanoti, Anshu; Dasgupta, Soumen; Agnihotri, Vasudha; Gupta, Priti; Goswami, Amar N.; Garg, Mansi; Tangstad, Elisabeth; Stöcker, Michael; Karlsson, Arne; Vistad, Ørnulv B.

doi:10.1016/j.micromeso.2011.01.009

Cited by 12 publications

(5 citation statements)

References 16 publications

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“…Both authors pointed out that the thermal regeneration of activated carbon is not suitable. Most of the investigated adsorbents have to be activated in a He, an Ar, or a H 2 atmosphere after regeneration. ,,,− No activation under such atmospheres is feasible because no He, Ar, or H 2 is available on board.…”

Section: Introductionmentioning

confidence: 99%

Adsorptive Desulfurization: Fast On-Board Regeneration and the Influence of Fatty Acid Methyl Ester on Desulfurization and in Situ Regeneration Performance of a Silver-Based Adsorbent

et al. 2016

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Adsorptive on-board desulfurization units require a high desulfurization and regeneration performance for a wide range of fuels to keep them small and ensure long maintenance intervals. A novel thermal regeneration strategy was investigated in this work, fulfilling all requirements for in situ on-board regeneration. In this strategy, a temperature-controlled flow rate (TCFR) of air was used to control the temperature inside the adsorber. With this dynamic approach, the regeneration time was reduced significantly in comparison to other thermal regeneration strategies. The novel regeneration strategy was tested using Ag–Al2O3 as an adsorbent to desulfurize a benzothiophen (BT)-enriched road diesel (300 ppmw of total sulfur). A commercial diesel containing fatty acid methyl ester (FAME) was used to evaluate the fuel flexibility regarding desulfurization and regeneration performance. In the case of 6.63 wt % FAME and 300 ppmw of sulfur, the breakthrough adsorption capacity of sulfur decreased from 1.04 to 0.17 mg/g. In TCFR regeneration experiments, the breakthrough adsorption capacity was restored to over 94% in the case of both fuels. Thereby, the Brunauer–Emmett–Teller (BET) surface area of the regenerated adsorbent decreased by only 1.5%, and negligible carbon deposits were detected.

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Section: Introductionmentioning

confidence: 99%

Adsorptive Desulfurization: Fast On-Board Regeneration and the Influence of Fatty Acid Methyl Ester on Desulfurization and in Situ Regeneration Performance of a Silver-Based Adsorbent

et al. 2016

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“…A combined solvent regeneration-thermal oxidation approach for regeneration of spent adsorbent was also suggested but this will bring additional complexity in the regeneration scheme. 23 In continuation of our earlier work [24][25][26] on adsorptive desulphurization process development, in the present work we have studied feasibility of ultra deep desulfurization of a low sulphur (50 ppm) commercial diesel using a zeolite based vapor phase adsorption process. The sulphur adsorption was carried out at low pressure with negligible consumption of hydrogen.…”

Section: Introductionmentioning

confidence: 92%

“…A simplied schematic of the unit has been reported in our earlier publications. 25,26 For adsorptive desulfurization experiments the feed used was a commercial high speed diesel having 50 ppm total sulphur. Before using as feed in adsorption studies the commercial BS IV grade diesel was pretreated through a bed of porous alumina to avoid any potential fouling of the NiY adsorbent by additives particularly the metal containing ones present in the commercial diesel.…”

Section: Sulphur Adsorption Breakthrough Studiesmentioning

confidence: 99%

A vapor phase adsorptive desulfurization process for producing ultra low sulphur diesel using NiY zeolite as a regenerable adsorbent

et al. 2015

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A NiY zeolite based vapor phase adsorptive desulfurization process has been described which can bring down sulphur concentration of a commercial BS IV grade (Euro IV equivalent) diesel from 50 ppm to < 5 ppm level. Compared to literature reports on fixed bed adsorptive desulfurization of diesel using zeolite adsorbents, the present process has advantage of easy regenerability of the adsorbent with minimum temperature swing between adsorption and regeneration step. Multi cycle stability of the desulfurization performance was also demonstrated.

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“…Whilst other alternative high throughput production methods were developed, [73][74][75] the majority of new innovations are limited to HT structural characterization and activity or HT post-synthetic treatments. [44,[76][77][78][79][80][81][82][83] Notably, there is a lack of development of "full" HT library generation workflows, with current state-of-the-art systems only automating a few portions of the synthesis process or lack robotization in important areas, such as zeolite synthesis or postsynthetic treatment. Also, the automated workstations are often isolated from other stations with manual, as opposed to more efficient robotic, sample transport being required.…”

Section: Implementation Of Robotics and Automationmentioning

confidence: 99%

High Throughput Methods in the Synthesis, Characterization, and Optimization of Porous Materials

et al. 2020

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Notwithstanding these impediments, in many fields of materials science, solutions are being designed to mitigate hindrances to the efficient sampling of chemical space and improving the robustness of computational screening models through a combination of high throughput synthesis (HTS), characterization, and machine learning. In this review, we highlight key developments in high throughput approaches pertinent to porous materials. Specifically, we focus on developments in the field of zeolitic materials, metal-organic frameworks (MOFs), and touch upon covalent organic frameworks (COFs). Although superficially these classes of materials have little in common, there are structural links such as topology which allow for the consideration of how high throughput methods contrast with one another. By contrasting developments in different fields, we identify some underutilized approaches which could be leveraged in the future. We target structurally ordered materials because the exploration of chemical and topological space is more straightforward to enumerate, though similar approaches could be applied to disordered materials. The scale of the problem faced in materials science of targeted structure and function [1] is by no means unique; in drug discovery, HTS and chemoinformatic approaches have been used for more than 40 years in an attempt to accelerate the discovery of druggable molecules. [2,3] Unlike the drug discovery process, where Lipinski's "rule of 5" [4] provides a reliable top level sift for viable targets, identifying the most promising material for a target application requires very particular properties that may be intertwined in complex and contradictory ways. For example, thermoelectrics require high electrical conductivity and low thermal conductivity and yet these properties are typically correlated unless they can be separated. [5] Given the large scope of potential applications, the advent of the Materials Genome Initiative (MGI) [6,7] in the United States has undoubtedly helped to promote ways to solve the aforementioned obstacles and numerous others. Similarly there are major initiatives within the EU (e.g., NOMAD [8] and BIGmax [9]) and Switzerland (MARVEL [10]). In the MGI, nanoporous materials, including zeolites and MOFs, have been specifically targeted [11] and in this review, we seek to highlight particular challenges in the field of porous materials and how researchers have sought to overcome these challenges. We focus primarily on the methods used in HTS and rapid throughput/screening computational approaches. Aspects of high throughput computation applied to porous materials have been reviewed before, [12-14] as has high throughput experimentation (HTE) [15,16] but here we focus on their combination within an integrated workflow. Porous materials are widely employed in a large range of applications, in particular, for storage, separation, and catalysis of fine chemicals. Synthesis, characterization, and pre-and post-synthetic computer simulations are mostly carried out in a piecemeal a...

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A zeolite based vapor phase adsorptive desulfurization process for naphtha

Cited by 12 publications

References 16 publications

Adsorptive Desulfurization: Fast On-Board Regeneration and the Influence of Fatty Acid Methyl Ester on Desulfurization and in Situ Regeneration Performance of a Silver-Based Adsorbent

Adsorptive Desulfurization: Fast On-Board Regeneration and the Influence of Fatty Acid Methyl Ester on Desulfurization and in Situ Regeneration Performance of a Silver-Based Adsorbent

A vapor phase adsorptive desulfurization process for producing ultra low sulphur diesel using NiY zeolite as a regenerable adsorbent

High Throughput Methods in the Synthesis, Characterization, and Optimization of Porous Materials

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