Microemulsion-Templated Synthesis of Highly Active High-Temperature Stable Partial Oxidation Catalysts

2002 ◽  
Vol 756 ◽  
Author(s):  
Mark Kirchhoff ◽  
Ullrich Specht ◽  
Götz Veser
Keyword(s):  
High Temperature ◽  
Partial Oxidation ◽  
Sol Gel ◽  
Oxidation Reactions ◽  
Templated Synthesis ◽  
Long Term Stability ◽  
Oxidation Of Methane ◽  
Highly Active ◽  
Sol Gel Synthesis

ABSTRACTHighly active catalysts for high-temperature partial oxidation reactions have been synthesized based on a microemulsion-templated sol-gel synthesis. The catalysts were tested with the direct catalytic oxidation of methane to synthesis gas and showed excellent selectitivites towards syngas combined with very high activity and low ignition temperatures. Furthermore, a surprisingly high long term stability was observed at these high-temperature conditions of T > 900°C. The catalyst therefore seem very promising candidates for high-temperature partial oxidation and hydrogen production from hydrocarbon fuels.

ATI 6-2-4-2

Alloy Digest ◽  
2020 ◽  
Vol 69 (8) ◽  
Keyword(s):  
Tensile Strength ◽  
Titanium Alloy ◽  
High Temperature ◽  
Creep Strength ◽  
High Strength ◽  
Heat Treating ◽  
Good Combination ◽  
Long Term Stability ◽  
Temperature Performance

Abstract ATI 6-2-4-2 is a near-alpha, high strength, titanium alloy that exhibits a good combination of tensile strength, creep strength, toughness, and long-term stability at temperatures up to 425 °C (800 °F). Silicon up to 0.1% frequently is added to improve the creep resistance of the alloy. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as creep. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: Ti-169. Producer or Source: ATI.

scholarly journals CO Detection Investigation at High Temperature by SiC MISFET Metal/Oxide Gas Sensors

Proceedings ◽  
2021 ◽  
Vol 56 (1) ◽  
pp. 41
Author(s):  
Lida Khajavizadeh ◽  
Anita Lloyd Spetz ◽  
Mike Andersson
Keyword(s):  
High Temperature ◽  
Gas Sensors ◽  
Elevated Temperatures ◽  
Long Term Stability ◽  
Stability Performance ◽  
Catalytic Metal ◽  
Co Detection ◽  
Effect Transistor ◽  
Metal Oxide Gas Sensors

In order to investigate the necessary device improvements for high-temperature CO sensing with SiC metal insulator semiconductor field effect transistor (MISFET)-based chemical gas sensors, devices employing, as the gas-sensitive gate contact, a film of co-deposited Pt/Al2O3 instead of the commonly used catalytic metal-based contacts were fabricated and characterized for CO detection at elevated temperatures and different CO and O2 levels. It can be concluded that the sensing mechanism at elevated temperatures correlates with oxygen removal from the sensor surface rather than the surface CO coverage as observed at lower temperatures. The long-term stability performance was also shown to be improved compared to that of previously studied devices.

scholarly journals Investigation on the Cause of the SO2 Generation during Hot Gas Desulfurization (HGD) Process

Catalysts ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 985
Author(s):  
Byungwook Hwang ◽  
Jung Hwan Kim ◽  
Doyeon Lee ◽  
Hyungseok Nam ◽  
Ha Na Kim ◽  
...  
Keyword(s):  
High Temperature ◽  
Combined Cycle ◽  
Integrated Gasification Combined Cycle ◽  
H2s Removal ◽  
Long Term Stability ◽  
Product Gas ◽  
Integrated Gasification ◽  
Hot Gas Desulfurization ◽  
So2 Gas

In the integrated gasification combined cycle (IGCC) process, the sulfur compounds present in coal are converted to hydrogen sulfide (H2S) when the coal is gasified. Due to its harmful effects on sorbent/solvent and environmental regulations, H2S needs to be removed from the product gas stream. To simulate the H2S removal process, desulfurization was carried out using a dry sorbent as a fluidizing material within a bubbling, high-temperature fluidized bed reactor. The ZnO-based sorbent showed not only an excellent capacity of H2S removal but also long-term stability. However, unexpected SO2 gas at a concentration of several hundred ppm was detected during the desulfurization reaction. Thus, we determined that there is an unknown source that supplies oxygen to ZnS, and identified the oxygen supplier through three possibilities: oxygen by reactant (fresh sorbent, ZnO), byproduct (ZnSO4), and product (H2O). From the experiment results, we found that the H2O produced from the reaction reacts with ZnS, resulting in SO2 gas being generated during desulfurization. The unknown oxygen source during desulfurization was deduced to be oxygen from H2O produced during desulfurization. That is, the oxygen from produced H2O reacts with ZnS, leading to SO2 generation at high temperature.

Development of a 300°C capable SiC based operational amplifier

2010 ◽  
Vol 2010 (HITEC) ◽  
pp. 000305-000309 ◽  
Author(s):  
Vinayak Tilak ◽  
Cheng-Po Chen ◽  
Peter Losee ◽  
Emad Andarawis ◽  
Zachary Stum
Keyword(s):  
Silicon Carbide ◽  
High Temperature ◽  
Operational Amplifier ◽  
Room Temperature ◽  
Open Loop ◽  
Common Source ◽  
Loop Gain ◽  
Long Term Stability ◽  
Silicon Silicon

Silicon carbide based ICs have the potential to operate at temperatures exceeding that of conventional semiconductors such as silicon. Silicon carbide (SiC) based MOSFETs and ICs were fabricated and measured at room temperature and 300°C. A common source amplifier was fabricated and tested at room temperature and high temperature. The gain at room temperature and high temperature was 7.6 and 6.8 respectively. A SiC MOSFET based operational amplifier was also fabricated and tested at room temperature and 300°C. The small signal open loop gain at 1kHz was 60 dB at room temperature and 57 dB at 300°C. Long term stability testing at 300°C of the MOSFET and common source amplifiers showed very little drift.

scholarly journals Rational design of MgF2 catalysts with long-term stability for the dehydrofluorination of 1,1-difluoroethane (HFC-152a)

RSC Advances ◽  
2019 ◽  
Vol 9 (41) ◽  
pp. 23744-23751 ◽  
Author(s):  
Haodong Tang ◽  
Mingming Dang ◽  
Yuzhen Li ◽  
Lichun Li ◽  
Wenfeng Han ◽  
...  
Keyword(s):  
Rational Design ◽  
Sol Gel ◽  
Hard Template ◽  
Term Stability ◽  
Long Term Stability ◽  
Improved Stability ◽  
Hfc 152A ◽  
Template Methods

In this study, sol–gel, precipitation and hard-template methods were applied to synthesize MgF2 catalysts with improved stability towards dehydrofluorination of hydrofluorocarbons and MgF2-T catalysts demonstrated superior long-term stability.

Partial oxidation of methane and methanol on FeOx-, MoOx- and FeMoOx -SiO2 catalysts prepared by sol-gel method: A comparative study

2020 ◽  
Vol 491 ◽  
pp. 110982
Author(s):  
William G. Cortés Ortiz ◽  
Daniel Delgado ◽  
Carlos Alberto Guerrero Fajardo ◽  
Said Agouram ◽  
Rut Sanchís ◽  
...  
Keyword(s):  
Comparative Study ◽  
Partial Oxidation ◽  
Sol Gel ◽  
Partial Oxidation Of Methane ◽  
Gel Method ◽  
Sol Gel Method ◽  
Oxidation Of Methane

scholarly journals Long-Term Stability and Durability of High-Temperature Alloys

JOM ◽  
2014 ◽  
Vol 66 (12) ◽  
pp. 2476-2477
Author(s):  
Chantal K. Sudbrack ◽  
Mark C. Hardy
Keyword(s):  
High Temperature ◽  
Term Stability ◽  
Long Term Stability ◽  
High Temperature Alloys

Highly Active and Stable Lanthanum-doped Core-Shell-structured Ni@SiO2Catalysts for the Partial Oxidation of Methane to Syngas

ChemCatChem ◽  
2013 ◽  
Vol 5 (12) ◽  
pp. 3781-3787 ◽  
Author(s):  
Lei Li ◽  
Yao Yao ◽  
Bo Sun ◽  
Zhaoyang Fei ◽  
Hao Xia ◽  
...  
Keyword(s):  
Partial Oxidation ◽  
Partial Oxidation Of Methane ◽  
Core Shell ◽  
Oxidation Of Methane ◽  
Highly Active
Sign in / Sign up

Export Citation Format

Share Document