High-entropy alloys (HEAs) are a class of alloys that are being considered for a number of applications. In the present study, the microstructures and 1050°C oxidation behaviors of two HEAs, Al10Cr22.5Co22.5Ni22.5Fe22.5 (at.%) and Al20Cr25Co25Ni25Si5 have been investigated along with Al15Cr10Co35Ni35Si5, which is a high-temperature shape-memory alloy. Oxide formation occurred via selective oxidation in a manner that was consistent with the oxide formation model devised by Giggins and Pettit for model Ni-Cr-Al alloys. The lower Al content alloy formed an external Cr2O3 scale and an internal subscale consisting of Al2O3 and AlN precipitates. The higher Al content alloys exhibited smaller mass gains and formed external Al2O3 scales without any internal oxidation of the alloys.

High-Temperature Oxidation Behavior of Al-Co-Cr-Ni-(Fe or Si) Multicomponent High-Entropy Alloys

Disclosed is a high temperature fuel cell power generation system that includes a high temperature fuel cell having an anode inlet and exhaust, and a cathode inlet and exhaust. The system also includes a gas separation means operable to recover hydrogen gas from the anode exhaust and to provide at least a portion of such hydrogen gas for recycle to the anode inlet. The system further includes energy recovery means operable to recover energy from the fuel cell exhaust gases and to provide at least a portion of such recovered energy to drive mechanical loads associated with the operation of the gas separation means, wherein a portion of the recovered hydrogen gas is provided for export from the generation system as hydrogen fuel.

High temperature fuel cell power plant

A process and system for providing a hydrogen-containing gas stream to a fuel cell anode that includes providing a hydrogen-containing gas stream that includes carbon monoxide, introducing the hydrogen-containing gas stream into a pressure swing adsorption module that includes at least one carbon monoxide-selective adsorbent to produce a purified hydrogen-containing gas stream, and introducing the purified hydrogen-containing gas stream to the fuel cell anode. The pressure swing adsorption module can also include a second adsorbent and/or catalyst. Also disclosed is a fuel cell system coupled to an internal combustion engine and a fuel cell system that utilizes fuel cell waste heat for vaporizing a hydrocarbon/water mixture.

Systems and processes for providing hydrogen to fuel cells

An electrical current generating system is disclosed that includes a fuel cell operating at a temperature of at least about 250° C. (for example, a molten carbonate fuel cell or a solid oxide fuel cell), a hydrogen gas separation system or oxygen gas delivery system that includes a compressor or pump, and a drive system for the compressor or pump that includes means for recovering energy from at least one of the hydrogen gas separation system, oxygen gas delivery system, or heat of the fuel cell. The drive system could be a gas turbine system. The hydrogen gas separation system or the oxygen gas delivery system may include a pressure swing adsorption module.

Energy efficient gas separation for fuel cells

An electrical generating system consists of a fuel cell, and an oxygen gas delivery. The fuel cell includes and anode channel having an anode gas inlet for receiving a supply of hydrogen gas, a cathode channel having a cathode gas inlet and a cathode gas outlet, and an electrolyte in communication with the anode and cathode channel for facilitating ion exchange between the anode and cathode channel. The oxygen gas delivery system is coupled to the cathode gas inlet and delivers oxygen gas to the cathode channel. The electrical current generating system also includes gas recirculation means couple to the cathode gas outlet for recirculating a portion of cathode exhaust gas exhausted from the cathode gas outlet to the cathode gas inlet.

Electrical current generation system

This study focuses on the oxidation behavior of commercially available HR120 in air at 1,050 °C from 30 min to 100 h. The oxidation kinetics were first studied by thermogravimetry and isothermal exposure. The oxidation products were fully characterized using ex and in situ X-ray diffraction (XRD) and FEG-SEM observations. HR120 experienced at 1,050 °C a non protective transient stage and formed a multilayered oxide scale (SiO2–Cr2O3–XCr2O4 with X = Mn and/or Fe, Ni). A series of complementary characterization methods (gold and isotopic marker experiments, photoelectrochemistry (PEC)) were implemented to elucidate the oxidation mechanism. The study identified a n-type semi-conductivity accompanied by an inward growth of the scale. Thus, assuming that diffusion in the oxide scale controlled chromia-scale growth, the oxygen vacancy was the major point defect governing the solid state transport. This result was attributed to the presence of a MnCr2O4 spinel layer at the top of chromia that strongly decreased the oxygen pressure at the interface spinel/chromia.

Oxide Growth Characterization During Short-Time Oxidation of a Commercially Available Chromia-Forming Alloy (HR-120) in Air at 1,050 °C

An exchanger comprises a plurality of plates (8) made of copper, nickel or aluminium or an alloy of these metals, which are separated by exchange corrugations made of copper or a copper alloy (6) and two outer sheets (7). The distance between the plates is more than 6 mm, optionally 8 mm.

Heat exchanger, in particular plate heat exchanger for an air separation unit

A device for separating at least one component from a gas mixture, comprising at least a pair of adsorber units, each adsorber unit comprising an envelope defining an inner volume having a lower end zone and an upper end zone. There is at least one adsorbent layer between the lower and upper end zones. A first conduit has one end communicating with the lower end zone, and a second conduit has one end communicating with the upper end zone. The adsorber units of the pairs are superposed and one of the first and second conduits of each adsorber includes a vertical central tube portion. The vertical central tube portions of the pair of adsorber units are mechanically interconnected in endwise abutting relationship. The adsorber units are superposed such that the envelopes of adjacent units leave an intermediate space therebetween. The first and second conduits each have an outer portion extending out of the envelope in the intermediate space.

Device for the separation of elements of a gas mixture by adsorption

Heat exchange assembly comprising at least one first and one second heat exchange body (5, 7), each body being of the plate heat exchanger type, comprising a plurality of metal plates of substantially similar contour extending along a first dimension or length and a second dimension or width, spaced from and arranged in parallel rows to one another along a third dimension or thickness and sealing means bounding flattened passages with the said plates, forming at least one passage of a first type and at least one passage of a second type, the sealing means allocated to each passage releasing one fluid inlet and one fluid outlet, characterized in that one side bounded by a width and a thickness of at least one first heat exchange body is located at least partially opposite a side bounded by a width and a thickness of at least one second heat exchange body, the two sides being separated by insulating material (I) .

Assembly of heat exchangers and a cryogenic distillation apparatus incorporating the same

The invention relates to a method for producing at least one gas having a low CO2 content and one or more fluids having a high CO2 content from a fluid to be treated containing CO2 and at least one compound that is more volatile than CO2, said method implementing at least the following steps: a) cooling said fluid to be treated; and b) separating, at a low temperature, said fluid cooled during step a) into said having a low CO2 content and one or more fluids having a high CO2 content; at least part of the cooling performed in step a) being carried out by exchanging heat with at least one fraction of said gas having low CO2 content in one or more regenerative exchangers.

Method for producing at least one gas having a low co2 content and at least one fluid having a high co2 content

Popular Tasks used by Researchers

How can I help with your research?

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

We encountered an error while loading the panel. Please try refreshing the page.

Something went wrong

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

Anyone with the link can view this chat. You can switch it back to private anytime.

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

Marc Wagner

Author Tools

Chat about Author