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1. A highly efficient and sulfur-tolerant Pd2Si/CNTs catalyst for hydrodesulfurization of dibenzothiophenes

Author:
Yang, Kaixuan; Chen, Xiao; Qi, Ji; Bai, Zongxuan; Zhang, Liangliang; Liang, Changhai
Source:
Journal of catalysis 2019 v.369 pp. 363-371
ISSN:
0021-9517
Subject:
desulfurization,   etc   ; catalysts; silicon; vapors;     Show all 4 Subjects
Abstract:
... A highly active and sulfur-tolerant 3 wt% Pd2Si/CNTs catalyst was prepared by chemical vapor deposition, in which dichlorodimethylsilane was used as an Si source. The as-prepared catalyst was used as an efficient catalyst for deep hydrodesulfurization (HDS) of dibenzothiophene and 4, 6-dimethyldibenzothiophene. The HDS activity over 3 wt% Pd2Si/CNTs is three times higher than that of the commercia ...
DOI:
10.1016/j.jcat.2018.11.013

2. Distribution and motion behavior of desulfurizer particles in hot metal with mechanical stirring

Author:
He, Meile; Wang, Nan; Chen, Ming; Chen, Min; Li, Chuanfu
Source:
Powder technology 2019
ISSN:
0032-5910
Subject:
desulfurization,   etc   ; agitation; impellers; mathematical models; mixing; powders;     Show all 6 Subjects
Abstract:
... To improve the desulfurization efficiency of hot metal with mechanical stirring, the distribution and motion behavior of desulfurizer particles have been investigated by numerical simulation. The volume fraction of desulfurizer particles in different ladle regions and particle trajectory are further discussed. In addition, the effects of rotation speed and eccentricity of impeller have also been e ...
DOI:
10.1016/j.powtec.2019.05.056

3. Desulfurization of Diaryl(heteroaryl) Sulfoxides with Benzyne

Author:
Chen, De-Li; Sun, Yan; Chen, Mengyuan; Li, Xiaojin; Zhang, Lei; Huang, Xin; Bai, Yihui; Luo, Fang; Peng, Bo
Source:
Organic letters 2019 v.21 no.11 pp. 3986-3989
ISSN:
1523-7052
Subject:
desulfurization,   etc   ; chemical reactions; halides; moieties; organic compounds;     Show all 5 Subjects
Abstract:
... Two benzyne-enabled desulfurization reactions have been demonstrated which convert diaryl sulfoxides and heteroaryl sulfoxides to biaryls and desulfurized heteroarenes, respectively. The reaction accessing biaryls tolerates a variety of functional groups, such as halides, pseudohalides, and carbonyls. Mechanistic studies reveal that both reactions proceed via a common assembly process but divergen ...
DOI:
10.1021/acs.orglett.9b01144

4. Total Synthesis of Hybridaphniphylline B

Author:
Zhang, Wenhao; Ding, Ming; Li, Jian; Guo, Zhicong; Lu, Ming; Chen, Yu; Liu, Lianchao; Shen, Yun-Heng; Li, Ang
Source:
Journal of the American Chemical Society 2018 v.140 no.12 pp. 4227-4231
ISSN:
1520-5126
Subject:
desulfurization,   etc   ; Daphniphyllum; alkaloids; glycosylation; solvents;     Show all 5 Subjects
Abstract:
... Hybridaphniphylline B (1) is a Daphniphyllum alkaloid possessing 11 rings and 19 stereocenters. Here we report the first total synthesis of 1 featuring a late-stage intermolecular Diels–Alder reaction of a fully elaborated cyclopentadiene and asperuloside tetraacetate. The diene was prepared on the basis of a scalable route to daphnilongeranin B (4). Claisen rearrangement of an allyl dienol ether ...
DOI:
10.1021/jacs.8b01681

5. Desulfurization of Offshore Natural Gas by Chelated Iron Solution in a HiGee Reactor: A Feasibility Study

Author:
Liu, Wei; Chu, Guang-Wen; Luo, Yong; Zhan, Yuan-Yuan; Zhang, Liang-Liang; Chen, Jian-Feng
Source:
Industrial & engineering chemistry process design and development 2019 v.58 no.24 pp. 10629-10634
ISSN:
1520-5045
Subject:
desulfurization,   etc   ; feasibility studies; hydrogen sulfide; iron; natural gas; sulfur;     Show all 6 Subjects
Abstract:
... Applying a HiGee reactor for H₂S removal with solid sulfur generation by a chelated iron solution offers an economical way to exploit offshore natural gas. However, the high H₂S removal efficiency with the blockage problem caused by sulfur deposited inside the rotor of HiGee reactor needs to be taken into consideration. In this work, a novel HiGee reactor, called a rotating packed bed (RPB) reacto ...
DOI:
10.1021/acs.iecr.9b02630

6. Effect of reduction temperature on the structure and hydrodesulfurization performance of Na doped Ni₂P/MCM-41 catalysts

Author:
Jiang, Nan; Zhang, Fuyong; Song, Hua
Source:
RSC advances 2019 v.9 no.27 pp. 15488-15494
ISSN:
2046-2069
Subject:
desulfurization,   etc   ; catalysts; hydrogenation; models; petroleum; pollution; sodium; sulfur; temperature;     Show all 9 Subjects
Abstract:
... The removal of sulfur compounds from petroleum is increasingly important because of the environmental pollution caused by sulfur compounds. In this work, Na doped Ni₂P/MCM-41 catalysts were successfully prepared, and their hydrodesulfurization (HDS) performances were assessed using dibenzothiophene (DBT) as a model molecule. Moreover, the effects of reduction temperature (450–600 °C) on the struct ...
DOI:
10.1039/c9ra01582e

7. Biodesulfurization of diesel oil in oil–water two phase reaction system by Gordonia sp. SC-10

Author:
Chen, Shuiquan; Zhao, Chaocheng; Liu, Qiyou; Zhang, Xiuxia; Sun, Shuo; Zang, Meng
Source:
Biotechnology letters 2019 v.41 no.4-5 pp. 547-554
ISSN:
0141-5492
Subject:
desulfurization,   etc   ; bacteria; biocatalysts; diesel fuel; industrialization; organic sulfur compounds; sulfur;     Show all 7 Subjects
Abstract:
... OBJECTIVES: Different sulfur contents of diesel oils were used for biodesulfurization to study the desulfurization capacity of Gordonia sp. SC-10 in oil–water two-phase reaction system. RESULTS: Gordonia sp. SC-10 showed great properties in desulfurizing diesel oil with different sulfur contents. This bacterium could decrease sulfur contents in different diesel oils from 194.7 ± 3.7 to 30.4 ± 0.5  ...
DOI:
10.1007/s10529-019-02663-9

8. Characteristics of low H2S concentration biogas desulfurization using a biotrickling filter: Performance and modeling analysis

Author:
Zhuo, Yang; Han, Yun; Qu, Qiliang; Li, Jie; Zhong, Chen; Peng, Dangcong
Source:
Bioresource technology 2019 v.280 pp. 143-150
ISSN:
0960-8524
Subject:
desulfurization,   etc   ; biofilters; biogas; hydrogen sulfide; models; pH; statistical analysis;     Show all 7 Subjects
Abstract:
... This study investigated the characteristics of low H2S concentration biogas biodesulfurization using a lab-scale biotrickling filter (BTF). The influence of operational parameters on H2S removal efficiency and H2S distributions in packed bed was evaluated by establishing a counter-current one-dimensional multi-layer BTF model and statistical analysis of the simulation results. The overall biodesul ...
DOI:
10.1016/j.biortech.2019.02.007

9. Extended Diethylglycine Homopeptides Formed by Desulfurization of Their Tetrahydrothiopyran Analogues

Author:
De Zotti, Marta; Clayden, Jonathan
Source:
Organic letters 2019 v.21 no.7 pp. 2209-2212
ISSN:
1523-7052
Subject:
desulfurization,   etc   ; chemical reactions; chemical structure; heterocyclic compounds; peptides;     Show all 5 Subjects
Abstract:
... Diethylglycine (Deg) homopeptides adopt the rare 2.0₅-helical conformation, the longest three-dimensional structure that a peptide of a given sequence can adopt. Despite this unique conformational feature, Deg is rarely used in peptide design because of its poor reactivity. In this paper, we show that reductive desulfurization of oligomers formed from more reactive tetrahydrothiopyran-containing p ...
DOI:
10.1021/acs.orglett.9b00501

10. Experimental study on the synergetic removal of fine particles by wet flue gas desulfurization tower with a flow pattern control device

Author:
Chen, Zhen; You, Changfu; Wang, Haiming; Liu, Qingxia
Source:
Powder technology 2019 v.343 pp. 122-128
ISSN:
0032-5910
Subject:
flue gas desulfurization,   etc   ; flue gas; powders; spraying; sulfur dioxide;     Show all 5 Subjects
Abstract:
... This work presents an enhancement method to improve the synergetic particles removal performance of Wet Flue Gas Desulfurization (WFGD) by adding a Flow Pattern Control (FPC) device. Experimental investigation was carried out to study the collection efficiency improvement with bubble flow formed in a single FPC unit. The results are compared to the collection efficiency with dispersed flow in an o ...
DOI:
10.1016/j.powtec.2018.11.017

11. Coupled Oxidation-Extraction Desulfurization: A Novel Evaluation for Diesel Fuel

Author:
Gao, Shurong; Chen, Xiaochun; Xi, Xiaotian; Abro, Masroor; Afzal, Waheed; Abro, Rashid; Yu, Guangren
Source:
ACS sustainable chemistry & engineering 2019 v.7 no.6 pp. 5660-5668
ISSN:
2168-0485
Subject:
desulfurization,   etc   ; diesel fuel; dimethylformamide; ionic liquids; laws and regulations; temperature;     Show all 6 Subjects
Abstract:
... In our previous experimental study, we used a desulfurization method, i.e., coupled oxidation-extraction desulfurization. To develop a new insight into the industrial-scale desulfurization process by this method, a process simulation study is of great importance. In this work, the industrial scale of the coupled desulfurization processing of ultralow-sulfur diesel fuel (ULSD), wherein [C₁ pyr]H₂PO ...
DOI:
10.1021/acssuschemeng.8b04218

12. Annulation Reactions of In-Situ-Generated N-(Het)aroyldiazenes with Isothiocyanates Leading to 2-Imino-1,3,4-oxadiazolines

Author:
Zhao, Qiongli; Ren, Linning; Hou, Jiao; Yu, Wenquan; Chang, Junbiao
Source:
Organic letters 2018 v.21 no.1 pp. 210-213
ISSN:
1523-7052
Subject:
desulfurization,   etc   ; chemical structure; hydrazides; isothiocyanates; oxidation; synthesis;     Show all 6 Subjects
Abstract:
... A novel annulation reaction of N-(het)aroyldiazenes and isothiocyanates has been established. This transformation involves a sequential cyclization and desulfurization/intramolecular rearrangement to produce 2-imino-1,3,4-oxadiazolines. The less-stable N-(het)aroyldiazenes can be conveniently generated in situ by I₂-mediated oxidation of hydrazides, which allows a one-pot synthesis of the products ...
DOI:
10.1021/acs.orglett.8b03663

13. Coupling of Sulfoxonium Ylides with Arynes: A Direct Synthesis of Pro-Chiral Aryl Ketosulfoxonium Ylides and Its Application in the Preparation of α-Aryl Ketones

Author:
Talero, Alexánder Garay; Martins, Bruna Simões; Burtoloso, Antonio C. B.
Source:
Organic letters 2018 v.20 no.22 pp. 7206-7211
ISSN:
1523-7052
Subject:
desulfurization,   etc   ; arylation; chemical structure; diazo compounds; ketones;     Show all 5 Subjects
Abstract:
... A general, mild, and versatile synthesis of the challenging α-aryl-β-ketosulfoxonium ylides has been developed for the first time, substituting traditional methods starting from diazo compounds. The arylation of easily accessible β-ketosulfoxonium ylides using aryne chemistry allowed the preparation of a large scope of the pro-chiral ylides in very good yields (40 examples; up to 85%). As applicat ...
DOI:
10.1021/acs.orglett.8b03126

14. One-pot synthesis of cup-like ZSM-5 zeolite and its excellent oxidative desulfurization performance

Author:
Zhang, Yuan; Zhang, Wei; Zhang, Ju; Dong, Zhao; Zhang, Xiongfu; Ding, Shujiang
Source:
RSC advances 2018 v.8 no.56 pp. 31979-31983
ISSN:
2046-2069
Subject:
desulfurization,   etc   ; catalysts; coordination polymers; crystals; synthesis; zeolites;     Show all 6 Subjects
Abstract:
... A one-step method to synthesize small size cup-like hollow ZSM-5 single crystals is reported in this paper. Characterization methods show that the product has a typical ZSM-5 structure and most crystals are uniform, mono dispersed crystal shells with distinct hollow structure. The average size of a single crystal is about 350 nm. Every cup-like hollow ZSM-5 crystal can act as a microreactor in the ...
DOI:
10.1039/c8ra06984k

15. A Traceless Tether Strategy for Achieving Formal Intermolecular Hexadehydro-Diels–Alder Reactions

Author:
Smela, Merrick Pierson; Hoye, Thomas R.
Source:
Organic letters 2018 v.20 no.17 pp. 5502-5505
ISSN:
1523-7052
Subject:
desulfurization,   etc   ; alkynes; chemical reactions; chemical structure; trapping;     Show all 5 Subjects
Abstract:
... A synthetic strategy formally equivalent to an intermolecular hexadehydro-Diels–Alder (HDDA) reaction is described. Sulfur-based linkers were designed and constructed by joining terminal alkynes or diynes using alkyne thiolate chemistry. The resulting tetraynes and triynes successfully underwent HDDA cyclization and benzyne trapping. Linker removal by reductive desulfurization was uneventful. The ...
DOI:
10.1021/acs.orglett.8b02473

16. Native Chemical Ligation–Photodesulfurization in Flow

Author:
Chisholm, Timothy S.; Clayton, Daniel; Dowman, Luke J.; Sayers, Jessica; Payne, Richard J.
Source:
Journal of the American Chemical Society 2018 v.140 no.29 pp. 9020-9024
ISSN:
1520-5126
Subject:
desulfurization,   etc   ; Human immunodeficiency virus; polypeptides; proteins; synthesis;     Show all 5 Subjects
Abstract:
... Native chemical ligation (NCL) combined with desulfurization chemistry has revolutionized the way in which large polypeptides and proteins are accessed by chemical synthesis. Herein, we outline the use of flow chemistry for the ligation-based assembly of polypeptides. We also describe the development of a novel photodesulfurization transformation that, when coupled with flow NCL, enables efficient ...
DOI:
10.1021/jacs.8b03115

17. Iodine-mediated direct synthesis of multifunctional 2-aminobenzimidazoles from N-substituted o-diaminoarenes and isothiocyanates

Author:
Wang, Zhen; Zhao, Qiongli; Hou, Jiao; Yu, Wenquan; Chang, Junbiao
Source:
Tetrahedron 2018 v.74 no.19 pp. 2324-2329
ISSN:
0040-4020
Subject:
desulfurization,   etc   ; chemical structure; cycloaddition reactions; isothiocyanates;     Show all 4 Subjects
Abstract:
... Multifunctional 2-aminobenzimidazoles were directly synthesized through sequential addition of N-substituted o-diaminoarenes to isothiocyanates, formation of carbodiimides via I2-mediated oxidative desulfurization, and intramolecular cycloaddition. This efficient and eco-friendly synthetic process provides a facile access to diverse 2-aminobenzimidazole derivatives from readily accessible substrat ...
DOI:
10.1016/j.tet.2018.03.049

18. Transparent predictive modelling of catalytic hydrodesulfurization using an interval type-2 fuzzy logic

Author:
Al-Jamimi, Hamdi A.; Saleh, Tawfik A.
Source:
Journal of cleaner production 2019 v.231 pp. 1079-1088
ISSN:
0959-6526
Subject:
desulfurization,   etc   ; bismuth; boron; catalysts; decision making; fuzzy logic; industry; oils; petroleum; phosphorus; prediction; sulfur; temperature; uncertainty;     Show all 14 Subjects
Abstract:
... Optimizing the desulfurization process in reactors would assist in predicting the performance of catalysts, and in turn, the final sulfur concentration in fuel. Machine learning (ML) techniques have proven their predictive capacity in solving challenging problems in the petroleum industry. Several ML-based sulfur predictors have been designed to predict the sulfur concentration in fuel products. T ...
DOI:
10.1016/j.jclepro.2019.05.224

19. A fluorescein-based AND-logic FPSi probe for the simultaneous detection of Hg2+ and F−

Author:
Zhang, Yufeng; Tu, Qin; Chen, Long; Li, Na; Yang, Liu; Zhang, Xiaoxue; Yuan, Mao-Sen; Wang, Jinyi
Source:
Talanta 2019 v.202 pp. 323-328
ISSN:
0039-9140
Subject:
desulfurization,   etc   ; chemical bonding; cropland; fluorescein; fluorescence; ions; mercury; soil; tap water;     Show all 9 Subjects
Abstract:
... In this study, we have designed and synthesized a novel ‘AND’ logic based fluorescence probe,1-(3′,6′-bis((tert-butyldiphenylsilyl)oxy)-3-oxospiro (isoindoline-1,9′-xanthen)-2-yl)-3-phenylthiourea (FPSi), for the rapid (3 min) simultaneous detection of F− and Hg2+ in DMSO/H2O solution (7:3, v/v). The FPSi probe, synthesized over three steps starting from commercially available fluorescein, was con ...
DOI:
10.1016/j.talanta.2019.05.008

20. Enhanced growth-driven stepwise inducible expression system development in haloalkaliphilic desulfurizing Thioalkalivibrio versutus

Author:
Sharshar, Moustafa Mohamed; Samak, Nadia Abdrabo; Hao, Xuemi; Mu, Tingzhen; Zhong, Wei; Yang, Maohua; Peh, Sumit; Ambreen, Sadaf; Xing, Jianmin
Source:
Bioresource technology 2019 v.288 pp. 121486
ISSN:
0960-8524
Subject:
desulfurization,   etc   ; Thioalkalivibrio versutus; autotrophs; biomass; genetic engineering; hydrogen sulfide; oxidation; sulfur; toxicity;     Show all 9 Subjects
Abstract:
... Highly toxic and flammable H2S gas has become an environmental threat. Because of its ability to efficiently remove H2S by oxidation, Thioalkalivibrio versutus is gaining more attention. Haloalkaliphilic autotrophs, like the bio-desulfurizing T. versutus, grow weakly. Weak growth makes any trial for developing potent genetic tools required for genetic engineering far from achieved. In this study, ...
DOI:
10.1016/j.biortech.2019.121486