Faster, automated Fisher number measurement with the new Micromeritics Sub-Sieve Autosizer II
Norcross, GA, USA – 03.12.2019 Micromeritics Instrument Corp., a leader in material characterization technology, today launched the new highly automated Sub-Sieve Autosizer II (SAS II), an instrument that boosts the productivity and accuracy of particle sizing via the air permeability technique. A direct and substantially improved successor to the renowned Fisher Model 95 SubSieve Sizer (FSSS), it generates ‘Fisher numbers’ which are highly consistent to those of its predecessor. With easy-to-use functionality and electronic data recording, the new SAS II is particularly useful for those complying with specific ASTM standards including E2980, E2651, B330-12 and B330-15 for metal powders and C721-15 for alumina and silica powders (ceramics).
The SAS II delivers particle size measurements in the range 0.2 to 75µm, a range that for economic and/or accurate sizing by sieve analysis. It utilizes the non-destructive air permeability technique to meet the requirement to size finer powders. The resulting ‘Fisher numbers’ are a critical part of established or historical specifications for a significant number of products. The technique involves measuring the pressure drop across a packed bed of sample at a defined air flow rate. The correlation between these two parameters is related to the particle size, or more specifically the specific surface area of a sample, via the Carman-Kozeny equation.
Integrated software makes the new SAS II quick and easy to set-up with a real-time data display simplifying method development. Reports are automatically generated and readily customized to company requirements, while security features safeguard measurement methods and configuration parameters from unauthorized change. Users can efficiently and reliably generate and record the ‘Fisher numbers’ required for QC and comparative testing, with minimal manual intervention.
Micromeritics introduces the Selective Adsorption Analyzer 8100
Norcross, GA, USA – 29 October 2019 Micromeritics Instrument Corp has introduced the new Selective Adsorption Analyzer 8100 (SAA-8100), a flexible gas delivery and management system for the precise characterization of adsorbent performance under process relevant conditions. It delivers reliable, selective adsorption data for gas/vapor mixtures by mass balance. A highly efficient tool for evaluating the performance of next generation adsorbents, the SAA 8100 is particularly valuable for researchers working in fields such as gas separation, storage and purification, carbon dioxide capture and energy storage.
The SAA-8100 incorporates precision mass flow controllers and proprietary, high performance blending valves. The resulting gas delivery system has minimal dead volume and ensures the precise control of both composition and flow rate. Adsorbent is held in a simple column that uses only 0.05 – 5 g of sample per measurement. A hot box provides accurate, uniform temperature control of the column, column, up to 200°C, with no cold spots. Sample activation up to 1,050°C can be carried out using the software-controlled furnace. Operating pressures can be controlled from atmospheric to 30 bar via a back-pressure valve. The gas detection system and other features such as vapor generation are readily customized for the application(s) of interest.
With the SAA-8100 generating accurate breakthrough curves under well-controlled conditions is simple and straightforward. A wealth of other characterization strategies can also be applied including mixed gas adsorption studies, competitive adsorption assessments, and high-pressure isotherm generation. Vapor generating options are available for those that require them.
New in situ Catalyst Characterization System delivers novel test capabilities for heterogeneous catalysts
Norcross, GA, USA – 24 October 2019 Micromeritics Instrument Corp., a global leader in material characterization technology, has launched the new in situ Catalyst Characterization System (ICCS) to deliver novel test capabilities for the reliable and industrially representative investigation of catalyst behavior. By integrating seamlessly with the Microactivity Effi, an advanced catalyst screening system, the ICCS allows researchers to quantify the impact of reactions on defining catalyst parameters such as number of active sites. Results directly support the development of more effective heterogeneous catalysts.
The ICCS incorporates mass flow controllers for fully automated precise gas control and a cold trap for the removal of condensable vapors. A precision thermal conductivity detector monitors changes in the concentration of gases flowing into and out of the sample reactor. The ICCS can be connected to any microreactor testing system, even custom-made units, to deliver important information on the catalyst under test, in situ.
When plumbed directly to the Effi, the ICCS allows in situ chemisorption measurements by pulsing a probe gas using a loop valve. Analyses can be carried out on catalysts; catalyst supports and other materials without any risk of exposure to the external environment since there is no requirement to discharge the sample from the reactor. This eliminates the possibility of contamination from atmospheric gases and moisture which may damage an active catalyst and compromise data integrity. Temperature programmed experiments including temperature programmed reduction (TPR), temperature programmed oxidation (TPO) and temperature programmed desorption (TPD) can be performed at atmospheric pressure or up to 20 bar pressure (depending on the pressure rating of the associated screening system), providing important information about the redox properties of a catalyst at high pressure.
New Surface Area Reference Materials to Support Exemplary Quality Assurance in Routine Measurements
Norcross, GA, USA – 22 October 2019 - Micromeritics Instrument Corp., a global leader in surface area measurement, has introduced new range of secondary standards which makes it easier to demonstrate the highest levels of data integrity when characterizing surface area by gas adsorption. Traceable to either NIST (National Institute of Standards and Technology) or BAM (Bundesanstalt für Materialforschung und -prüfung) standards the new materials are particularly relevant for analysis in highly-regulated environments, such as the pharmaceutical industry. By routinely analyzing these highly stable, rigorously characterized standards, users of any gas adsorption system – Micromeritics or alternative vendor - can robustly validate instrument performance.
“Gas adsorption systems generate surface area data from measurements of relatively simple parameters such as temperature and pressure and require minimal routine calibration,” said Tony Thornton, Director of Technical Information, Micromeritics. “However, it is good practice to routinely check performance and we’ve provided well-characterized materials to support that activity for some time. The difference with these new reference materials is that they are traceable, to NIST/BAM standards, a distinction that we know is critical to customers in certain industries.”
In total, Micromeritics will offer four traceable secondary surface area standards; one is already in place, two will be released over the next three months, with one more to follow soon. Together the standards span a surface area range of 1 to 175 m2/g making it possible to select a standard that is well-matched to the vast majority of industrial applications. Each material has been analyzed multiple times, on multiple instruments, including systems from the company’s Gemini, TriStar, 3-Flex and ASAP ranges, to produce a global average result. Materials are supplied with this result, with associated accuracy limits, and an accompanying test method.
Concordia University picks Micromeritics TriStar II for MOFs
Researchers designing and synthesizing new metal–organic frameworks (MOFs) at Concordia University, Canada are benefiting from high throughput surface area and porosity characterization with a Micromeritics TriStar II Plus automated, three-station gas adsorption system. A key focus for the group is rare earth MOFs with potential for wastewater clean-up and luminescence-based hazardous chemical detection.
“Surface area and porosity are defining characteristics of a MOF,” said Dr. Ashlee Howarth, Assistant Professor at Concordia University. “So, we need to be able to measure them as quickly and efficiently as possible. The TriStar runs 3 samples at a time, generating full data sets in 7 to 8 hours. This is extremely fast and means a same day result for my students; with some systems it would take 24 hours to run just a single sample. The ability to run three samples at once is really useful for confirming the reproducibility of a preparation method."
MOFs are an exciting class of chemical compounds with tunable porosity at the nanoscale and associated potential to address a wide range of societal concerns. The Concordia team are preparing MOFs to remove and/or catalytically breakdown waterborne contaminants not amenable to existing treatments, such as antibiotics and personal care products. The ability for rare earth MOFs to exhibit luminescence in response to the presence of hazardous analytes is also an area of interest. Surface area and porosity are performance-defining characteristics for all MOFs with pore size distribution providing insight into likely application.
“I’m not aware of another system that matches it in terms of that crucial combination of robustness, throughput and price. I will soon boost analytical capabilities further with the addition of a Smart VacPrep accessory which will speed up all stages of sample prep - both degassing and activation.”