Ultra-long VO2 (A) nanorods using the high-temperature mixing method under hydrothermal conditions: synthesis, evolution and thermochromic properties

CrystEngComm ◽  
2013 ◽  
Vol 15 (14) ◽  
pp. 2753 ◽  
Author(s):  
Pengcheng Liu ◽  
Kongjun Zhu ◽  
Yanfeng Gao ◽  
Qingliu Wu ◽  
Jinsong Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Hydrothermal Conditions ◽  
Thermochromic Properties ◽  
Mixing Method

Characterization and synthesis of KTa0.1Nb0.9O3 particles via high temperature mixing method under hydrothermal conditions

2012 ◽  
Vol 23 (5) ◽  
pp. 558-561 ◽  
Author(s):  
Honghui Gu ◽  
Kongjun Zhu ◽  
Jinhao Qiu ◽  
Yang Cao ◽  
Hongli Ji
Keyword(s):  
High Temperature ◽  
Hydrothermal Conditions ◽  
Mixing Method

Synthesis of (K, Na)NbO3 particles by high temperature mixing method under hydrothermal conditions

2010 ◽  
Vol 64 (1) ◽  
pp. 77-79 ◽  
Author(s):  
Lin Bai ◽  
Kongjun Zhu ◽  
Likui Su ◽  
Jinhao Qiu ◽  
Hongli Ji
Keyword(s):  
High Temperature ◽  
Hydrothermal Conditions ◽  
Mixing Method

scholarly journals Synthesis and crystallographic study of Pb–Sr hydroxyapatite solid solutions by high temperature mixing method under hydrothermal conditions

2009 ◽  
Vol 44 (6) ◽  
pp. 1392-1396 ◽  
Author(s):  
Kongjun Zhu ◽  
Kazumichi Yanagisawa ◽  
Rie Shimanouchi ◽  
Ayumu Onda ◽  
Koji Kajiyoshi ◽  
...  
Keyword(s):  
High Temperature ◽  
Solid Solutions ◽  
Hydrothermal Conditions ◽  
Crystallographic Study ◽  
Mixing Method

scholarly journals Morphology variation of cadmium hydroxyapatite synthesized by high temperature mixing method under hydrothermal conditions

2009 ◽  
Vol 113 (1) ◽  
pp. 239-243 ◽  
Author(s):  
Kongjun Zhu ◽  
Kazumichi Yanagisawa ◽  
Ayumu Onda ◽  
Koji Kajiyoshi ◽  
Jinhao Qiu
Keyword(s):  
High Temperature ◽  
Hydrothermal Conditions ◽  
Mixing Method

scholarly journals Crystallographic study of lead-substituted hydroxyapatite synthesized by high-temperature mixing method under hydrothermal conditions

2010 ◽  
Vol 363 (8) ◽  
pp. 1785-1790 ◽  
Author(s):  
Kongjun Zhu ◽  
Jinhao Qiu ◽  
Hongli Ji ◽  
Kazumichi Yanagisawa ◽  
Rie Shimanouchi ◽  
...  
Keyword(s):  
High Temperature ◽  
Hydrothermal Conditions ◽  
Crystallographic Study ◽  
Mixing Method

scholarly journals Bi-Functional Catalyst/Sorbent for a H2-Rich Gas from Biomass Gasification

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1249
Author(s):  
Francesca Micheli ◽  
Enrica Mattucci ◽  
Claire Courson ◽  
Katia Gallucci
Keyword(s):  
High Temperature ◽  
Functional Materials ◽  
Active Phase ◽  
Biomass Gasification ◽  
X Ray Diffraction ◽  
Solid Sorbents ◽  
Co2 Sorbent ◽  
Mixing Method ◽  
Temperature Programmed ◽  
Sorption Study

The aim of this work is to identify the effect of the CaO phase as a CO2 sorbent and mayenite (Ca12Al14O33) as a stabilizing phase in a bi-functional material for CO2 capture in biomass syngas conditioning and cleaning at high temperature. The effect of different CaO weight contents is studied (0, 56, 85, 100 wt%) in sorbents synthesized by the wet mixing method. These high temperature solid sorbents are upgraded to bi-functional compounds by the addition of 3 or 6 wt% of nickel chosen as the metal active phase. N2 adsorption, X-ray diffraction, scanning electronic microscopy, temperature-programmed reduction analyses and CO2 sorption study were performed to characterize structural, textural, reducibility and sorption properties of bi-functional materials. Finally, sorption-enhanced reforming of toluene (chosen as tar model), of methane then of methane and toluene with bi-functional compounds were performed to study the best material to improve H2 content in a syngas, provided by steam biomass gasification. If the catalytic activity on the sorption enhanced reforming of methane exhibits a fast fall-down after 10–15 min of experimental test, the reforming of toluene reaches a constant conversion of 99.9% by using bi-functional materials.

HYDROTHERMAL MODELING OF SECONDARY RESERVOIR FORMATI ON IN SILICEOUS LIMESTONS (H2O–CO2 SYSTEM)

2020 ◽  
pp. 43-58
Author(s):  
M. Yu. Zubkov ◽  
Keyword(s):  
Carbon Dioxide ◽  
High Temperature ◽  
Amorphous Silica ◽  
Hydrothermal Fluid ◽  
West Siberia ◽  
Hydrothermal Conditions ◽  
Secondary Porosity ◽  
First Results ◽  
Siliceous Limestone ◽  
First Time

We have discussed the first results of hydrothermal modeling of the formation of secondary reservoirs (hydrothermal silicites) in siliceous limestones, which are widespread in the Pre-Jurassic complex of West Siberia, namely, in the H2O-CO2 system, in which the mole fraction of CO2 varied from 0.0 to 1.0, and the temperature from 215 to 410оС. It has been found that in this system there is a predominant dissolution of carbonates and, first of all, dolomite, as a result of which the surface of siliceous limestone is silicified and secondary porosity is formed in them. In some samples, quartz microcrystals with varying degrees of perfection of crystal faceting are shaped. It is found that pyrite is also unstable under these hydrothermal conditions and decomposes forming iron-containing carbonates at its sacrifice. Its transformation into pyrrhotite and copper and nickel sulfides is also observed. Biogenic quartz dissolved by a hydrothermal fluid is released from it either in the form of microcrystalline quartz, or in the form of quenching phases represented by cristobalite and/or amorphous silica. It is also found that at temperatures above 360°C, instead of iron-containing carbonates, chlorite is formed due to pyrite, while kaolinite also decomposes along with pyrite. It was experimentally established for the first time that at a high temperature (410°C), carbon dioxide acquires oxidizing properties and, as a result of its interaction with copper, oxide and red oxide of copper are formed. In addition, under these conditions, pyrite passes into iron-containing carbonates rather than chlorite. The main regularities of the formation of secondary reservoirs, i. e. hydrothermal silicites, in the Paleozoic siliceous limestone have been revealed.

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