In situ NMR measurements under hydrothermal conditions: study of the formation of polymeric Al hydrolysis species

In situ NMR spectroscopy is a powerful technique to investigate charge storage mechanisms in carbon-based supercapacitors thanks to its ability to distinguish ionic and molecular species adsorbed in the porous...

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Hydrothermal Synthesis and Structure Characterization of Two Hybrid Metal Phosphonates Materials

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1088.309 ◽

2015 ◽

Vol 1088 ◽

pp. 309-313

Author(s):

Chang Feng Sun ◽

Yan Yan Pang ◽

Ying Zhao ◽

Yu Yang

Keyword(s):

Hydrothermal Synthesis ◽

Structure Characterization ◽

Hydrothermal Conditions ◽

Metal Phosphonates ◽

Two Hybrid

Under hydrothermal conditions, two copper phosphonates, [Cu2(H2O)2(H2L)(bpy)2(H3L)2]·2H2O (1) and [Cu2(H2O)2(H2L)2(phen)2]·6H2O (2) (H4L = p-xylylenediphosphonic acid, bpy = 2,2'-bipyridine and phen = 1,10-phenanthroline), have been synthesized using diethyl p-xylylenediphosphonate (dixdp), in which p-xylylenediphosphonic acid (H4L) was generated via in situ hydrolysis. Complexe 1 forms a zero-dimensional (0D) bimetallic rings, while complex 2 features a 0D structure containing two kinds of partially deprotonated H3L-and H2L2-ligand.

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Ionization constants and thermal stabilities of uracil and adenine under hydrothermal conditions as measured by in situ UV–visible spectroscopy

Geochimica et Cosmochimica Acta ◽

10.1016/j.gca.2012.06.023 ◽

2012 ◽

Vol 93 ◽

pp. 182-204 ◽

Cited By ~ 5

Author(s):

Erik Balodis ◽

Melerin Madekufamba ◽

Liliana N. Trevani ◽

Peter R. Tremaine

Keyword(s):

Ionization Constants ◽

Visible Spectroscopy ◽

Hydrothermal Conditions ◽

Thermal Stabilities ◽

Uv Visible

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Industrial Application of Nickel Tallate Catalyst During Cyclic Steam Stimulation in Boca De Jaruco Reservoir

10.2118/206419-ms ◽

2021 ◽

Author(s):

Alexey V. Vakhin ◽

Irek I. Mukhamatdinov ◽

Firdavs A. Aliev ◽

Dmitriy F. Feoktistov ◽

Sergey A. Sitnov ◽

...

Keyword(s):

Crude Oil ◽

Oil Recovery ◽

Heavy Oil ◽

Industrial Application ◽

Laboratory Scale ◽

Catalyst Precursor ◽

Hydrothermal Conditions ◽

Cyclic Steam Stimulation ◽

Steam Stimulation

Abstract A nickel-based catalyst precursor has been synthesized for in-situ upgrading of heavy crude oil that is capable of increasing the efficiency of steam stimulation techniques. The precursor activation occurs due to the decomposition of nickel tallate under hydrothermal conditions. The aim of this study is to analyze the efficiency of in-situ catalytic upgrading of heavy oil from laboratory scale experiments to the field-scale implementation in Boca de Jaruco reservoir. The proposed catalytic composition for in-reservoir chemical transformation of heavy oil and natural bitumen is composed of oil-soluble nickel compound and organic hydrogen donor solvent. The nickel-based catalytic composition in laboratory-scale hydrothermal conditions at 300°С and 90 bars demonstrated a high performance; the content of asphaltenes was reduced from 22% to 7 wt.%. The viscosity of crude oil was also reduced by three times. The technology for industrial-scale production of catalyst precursor was designed and the first pilot batch with a mass of 12 ton was achieved. A «Cyclic steam stimulation» technology was modified in order to deliver the catalytic composition to the pay zones of Boca de Jaruco reservoir (Cuba). The active forms of catalyst precursors are nanodispersed mixed oxides and sulfides of nickel. The pilot test of catalyst injection was carried out in bituminous carbonate formation M, in Boca de Jaruco reservoir (Cuba). The application of catalytic composition provided increase in cumulative oil production and incremental oil recovery in contrast to the previous cycle (without catalyst) is 170% up to date (the effect is in progress). After injection of catalysts, more than 200 samples from production well were analyzed in laboratory. Based on the physical and chemical properties of investigated samples and considering the excellent oil recovery coefficient it is decided to expand the industrial application of catalysts in the given reservoir. The project is scheduled on the fourth quarter of 2021.

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Non-Selective Dimerization of Vinyl Silanes by the Putative (Phenanthroline)PdMe Cation to 1,4-Bis(trialkoxysilyl)butenes

Inorganics ◽

10.3390/inorganics6040102 ◽

2018 ◽

Vol 6 (4) ◽

pp. 102

Author(s):

Sandun Perera ◽

Michael Findlater

Keyword(s):

Nmr Spectroscopy ◽

Palladium Complex ◽

Organic Products ◽

Vinyl Silanes ◽

In Situ Nmr Spectroscopy ◽

In Situ Nmr ◽

Moderate Yield

Activation of the dialkylpalladium complex (phen)Pd(CH3)2 (phen = 1,10-phenanthroline) with B(C6F5)3 affords a competent catalyst for the dimerization of vinyl silanes. All organic products of the catalytic dimerization of trialkoxyvinylsilanes were characterized by in situ NMR spectroscopy and GC–MS. The putative palladium cation was characterized by NMR spectroscopy. Upon activation, the palladium complex generated products in moderate yield (60–70%) and selectivity (~60:40, dimer:disproportionation products).

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In-Situ NMR Measurement of Reactivity Ratios for Copolymerization of Methyl Methacrylate and Diallyl Dimethylammonium Chloride

Industrial & Engineering Chemistry Research ◽

10.1021/acs.iecr.8b04033 ◽

2018 ◽

Vol 57 (46) ◽

pp. 15654-15662 ◽

Cited By ~ 3

Author(s):

Jiangyan Feng ◽

Olabode O. Oyeneye ◽

William Z. Xu ◽

Paul A. Charpentier

Keyword(s):

Methyl Methacrylate ◽

Reactivity Ratios ◽

Dimethylammonium Chloride ◽

In Situ Nmr

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Nuclear Magnetic Resonance Spectroscopy for In Situ Monitoring of Porous Materials Formation under Hydrothermal Conditions

Materials ◽

10.3390/ma11081416 ◽

2018 ◽

Vol 11 (8) ◽

pp. 1416 ◽

Cited By ~ 7

Author(s):

Mohamed Haouas

Keyword(s):

Nuclear Magnetic Resonance ◽

Magnetic Resonance ◽

Porous Materials ◽

Local Environment ◽

In Situ Monitoring ◽

Resonance Spectroscopy ◽

Hydrothermal Conditions ◽

Technological Advances ◽

Nuclear Magnetic

The employment of nuclear magnetic resonance (NMR) spectroscopy for studying crystalline porous materials formation is reviewed in the context of the development of in situ methodologies for the observation of the real synthesis medium, with the aim of unraveling the nucleation and growth processes mechanism. Both liquid and solid state NMR techniques are considered to probe the local environment at molecular level of the precursor species either soluble in the liquid phase or present in the reactive gel. Because the mass transport between the liquid and solid components of the heterogeneous system plays a key role in the synthesis course, the two methods provide unique insights and are complementary. Recent technological advances for hydrothermal conditions NMR are detailed and their applications to zeolite and related materials crystallization are illustrated. Achievements in the field are exemplified with some representative studies of relevance to zeolites, aluminophosphate zeotypes, and metal-organic frameworks.

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