Flame-made nanocrystalline ceria/zirconia doped with alumina or silica: structural properties and enhanced oxygen exchange capacity

2003 ◽  
Vol 13 (12) ◽  
pp. 2979 ◽  
Author(s):  
Heiko Schulz ◽  
Wendelin J. Stark ◽  
Marek Maciejewski ◽  
Sotiris E. Pratsinis ◽  
Alfons Baiker
Keyword(s):  
Structural Properties ◽  
Exchange Capacity ◽  
Oxygen Exchange ◽  
Nanocrystalline Ceria

scholarly journals Cyclic oxygen exchange capacity of Ce-doped V2O5 materials for syngas production via high-temperature thermochemical-looping reforming of methane

RSC Advances ◽  
2021 ◽  
Vol 11 (37) ◽  
pp. 23095-23104
Author(s):  
Asim Riaz ◽  
Wojciech Lipiński ◽  
Adrian Lowe
Keyword(s):  
High Temperature ◽  
Partial Oxidation ◽  
Exchange Capacity ◽  
Oxygen Exchange ◽  
High Oxygen ◽  
Methane Partial Oxidation ◽  
Syngas Production ◽  
Redox Pair ◽  
Cerium Doping ◽  
Fast Rates

Cerium doping into the V2O5 lattice forms a reversible V2O3/VO redox pair after sequential methane partial oxidation and CO2/H2O splitting reactions and produces syngas (H2, CO) with fast rates and high oxygen exchange capacity.

Enhanced oxygen exchange capacity in nano-structured vanadia–ceria multi-phase oxygen carriers for solar thermal fuel production

2019 ◽  
Vol 7 (48) ◽  
pp. 27347-27360 ◽  
Author(s):  
Asim Riaz ◽  
Muhammad Umair Ali ◽  
Wojciech Lipiński ◽  
Adrian Lowe
Keyword(s):  
Solar Energy ◽  
Hydrocarbon Fuel ◽  
Exchange Capacity ◽  
Oxygen Exchange ◽  
Solar Thermal ◽  
Oxygen Carriers ◽  
Fuel Production ◽  
Crucial Step ◽  
Redox Cycles ◽  
Multi Phase

Developing an efficient redox material is a fundamental and crucial step in sustainable hydrocarbon fuel production via solar energy-driven thermochemical redox cycles.

Muscle Blood Flow and Mitochondrial Function: Influence of Aging

2002 ◽  
Vol 12 (3) ◽  
pp. 368-378 ◽  
Author(s):  
Ronald L. Terjung ◽  
Ryszard Zarzeczny ◽  
H.T. Yang
Keyword(s):  
Skeletal Muscle ◽  
Blood Flow ◽  
Exercise Training ◽  
Muscle Blood Flow ◽  
The Elderly ◽  
Exchange Capacity ◽  
Oxygen Exchange ◽  
Whole Body ◽  
Tissue Blood Flow ◽  
Fiber Types

Skeletal muscle mitochondrial capacity (mito), tissue blood flow (BF) capacity, and oxygen exchange capacity (e.g., DO2) appear to be well matched. The different skeletal muscle fiber types and muscle remodeled, due to inactivity >(e.g., related to aging or disease) or exercise training, exhibit widely differing aerobics capacities (V̇O2max). Yet, there are remarkably coordinated alterations in these 3 parameters in each of these conditions. With such a balance, there is likely shared control among these parameters in limiting (V̇O2max) of muscle, although this is a matter of considerable debate. The reduction in aerobic capacity in elderly can be improved by submaximal aerobic exercise training; this is related to increases in muscle mitochondria concentration and capillarity, but probably not BF capacity, as this is limited by central cardiovascular function. Thus, exercise-induced biochemical adaptations and angiogenesis occur in the elderly. The increase in muscle capillarity likely contributes to the increased oxygen exchange capacity, typical of endurance type training. The increase in [mito] appears essential to realize the increased in muscle V̇O2max with training and amplifies the rate-limiting influence of the muscle’s oxygen exchange capacity. Further, vascular remodeling induced by exercise in the elderly could be effective at improving flow capacity, if limited by peripheral obstruction. Thus, the limits to aerobic function specific to aged muscle appear most influenced by inactivity, whereas central cardiovascular changes impact whole body performance. Some may consider the aged myocyte as a small, inactive, normal myocyte in need of activity!

scholarly journals Trends in the phase stability and thermochemical oxygen exchange of ceria doped with potentially tetravalent metals

2017 ◽  
Vol 5 (37) ◽  
pp. 19901-19913 ◽  
Author(s):  
Roger Jacot ◽  
René Moré ◽  
Ronald Michalsky ◽  
Aldo Steinfeld ◽  
Greta R. Patzke
Keyword(s):  
Phase Stability ◽  
Exchange Capacity ◽  
Oxygen Exchange ◽  
Solar Thermochemical

Screening of tetravalent dopants correlates dopant radius and oxygen exchange capacity for ceria optimization in solar thermochemical CO2 reduction.

scholarly journals Functionalized layered double hydroxide with compound to remove cationic and anionic pollutants: A review

2021 ◽  
Vol 1 (1) ◽  
pp. 26-29
Author(s):  
Siti Nabihan Ishak ◽  
Nik Ahmad Nizam Nik Malek
Keyword(s):  
Adsorption Isotherm ◽  
Anion Exchange ◽  
Structural Properties ◽  
Layered Double Hydroxide ◽  
Recent Progress ◽  
Exchange Capacity ◽  
Absorption Capacity ◽  
Adsorption Properties ◽  
Anion Exchange Capacity ◽  
Double Hydroxide

Layered double hydroxide (LDH) is one of the promising clay minerals that show great potential in various applications owing to its versatile structural properties. Prominently known for its high anion exchange capacity, this allows LDH to be considered as one of the most effective adsorbents in removing anionic toxic. However, the structural property of LDH hinders it from removing cationic toxic. Therefore, LDH have been functionalized to enhance its adsorption properties. In the present work, we aim to summarize the recent progress of functionalized LDH with different compounds for removal of both anionic and cationic toxics. The adsorption isotherm and effect of pH on absorption capacity also have been briefly reviewed.

Reactive stability of promising scalable doped ceria materials for thermochemical two-step CO2 dissociation

2018 ◽  
Vol 6 (14) ◽  
pp. 5807-5816 ◽  
Author(s):  
R. Jacot ◽  
J. Madhusudhan Naik ◽  
R. Moré ◽  
R. Michalsky ◽  
A. Steinfeld ◽  
...  
Keyword(s):  
Exchange Capacity ◽  
Oxygen Exchange ◽  
Doped Ceria ◽  
Redox Cycles ◽  
Stable Oxygen

This work reports an improved and stable oxygen exchange capacity (OEC) of optimized doped ceria Ce1−xMxO2−δ (M = Zr, Hf, Nb) materials for two-step thermochemical CO2 splitting over 50 consecutive redox cycles (7 days).

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