Characterization of Porous Materials
36Pages

GAS & VAPOR SORPTION INSTRUMENTS CHARACTERIZATION OF POROUS MATERIALS

FURTHER OPTIONS & ACCESSORIES MEASUREMENT OPERATION SOFTWARE MEASUREMENT RESULTS BELPREP SERIES: SAMPLE PRETREATMENT DEGASSER BELCRYO: CRYOGENIC TEMPERATURE CONTROL UNIT DYNAMIC GAS FLOW METHOD COMPARISON OF MEASUREMENT METHODS TECHNICAL SPECIFICATIONS INTRODUCTION, BELSORP HISTORY & GAS ADSORPTION BASICS

PARTICLE CHARACTERIZATION AT ITS BEST Microtrac MRB is your preferred partner for the comprehensive characterization of particulate systems. We provide our customers with advanced technologies to obtain consistently reliable results. Innovation and quality form the basis of our business. As part of the Verder Scientific Group we provide worldwide support through a network of subsidiaries and distributors in every country.

THREE PILLARS OF EXCELLENCE Dynamic Image Analysis Laser Diffraction Dynamic Light Scattering NANOTRAC Series BELSORP Series 3.6 nm Static Image Analysis BELPORE Series Microtrac MRB offers three product lines with centers of excellence on three continents. I Scattered Light Analysis: Specific surface area (BET) and porosity of Microtrac MRB is a leading supplier of both With the CAMSIZER series Microtrac MRB powders and solids are determined by gas dynamic and static light scattering systems provides high-quality systems for the adsorption or mercury intrusion method. The for particle size...

MORE THAN 30 YEARS THE HISTORY OF THE BELSORP SERIES I BELSORP MINI & MINI II First model (4 generation) MicrotracBEL, Microtrac World’s 1 model with 0.1 model with Advanced Free Torr pressure sensor for Space Measurement (AFSM) micropore investigation merge as part of Verder Sc. World’s 1 vapor adsorption High precision vapor World’s smallest and most automatic gas adsorption system for BET, PSD, etc. measurement using the volumertirc method samples simultaniously dynamic gas flow method

BASIC ADSORPTION PRINCIPLES THE BASICS OF ADSORPTION & ADSORPTION ISOTHERM The adsorption isotherm is defined as the re- describes the state after all pores have been lationship between the adsorbed amount of filled (saturated state). In general, by measur- evaluated from more than p/p0 = 0.97. In recent an adsorbent and the equilibrium pressure of ing adsorption isotherms such as N2 at 77 K years, we have been able to analyze the entire a gas or vapor at a constant temperature. The and Ar at 87 K, the specific surface area can pore size range up to several 100 nm using adsorbed amount is...

BASIC ADSORPTION PRINCIPLES VOLUMETRIC (MANOMETRIC) METHOD The accurate measurement of an adsorption First, the sample is filled into the sample cell dosing quantity with pressure (pi) is filled into isotherm is essential for determining the spe- and pretreated at a suitable temperature (heat the manifold with known volume (VS: standard cific surface area, pore size distribution, pore and vacuum). Then, the sample cell is trans- volume of the respective device). The valve C volume, adsorption rate, and surface proper- ferred to the measurement port (if pretreat- to the sample port is opened...

BASIC ADSORPTION PRINCIPLES ADVANCED FREE SPACE MEASUREMENT METHOD: AFSMTM When measuring the adsorption isotherm (ad- The free space in the sample cell gradually ment of free space Vd during adsorption mea- sorbed amount), it is not only necessary to ac- changes with the level of the refrigerant. Typi- surement. With AFSMTM, an initial free space of curately measure the adsorption amount, but cally, it is determined at the beginning or end both the sample cell and the reference cell is also to ensure fast and high reproducibility. The of the measurement and an attempt is made determined...

BASIC ADSORPTION PRINCIPLES AFSMTM VERSION 2: NEW & EFFICIENT He-gas-free, short-time measurement AFSM and free space determination that elim- Measurement techniques for determining free inates the need for He gas. This makes it pos- space often use calculated values of free space sible to obtain the highest repeatability in the at both room temperature and measurement world without the need for He gas. temperature of each sample tube (including the volume reduction filling rod and filter) and the true density of the sample. With the new technique “AFSMTM2”, although AFSMTM2 Features...

BASIC ADSORPTION PRINCIPLES Feedback Valve Control for Gas Dosing Gas Dosing Optimization (GDO) is an effective By detecting the gas dosing rate in conjunc- function that allows to measure with optimal tion with the installation environment (sec- conditions by using the previous adsorption ondary pressure of supplied gas cylinders; He, isotherm data for the sample. By utilizing GDO, the measurement isotherm possible to reduce the measurement time can be configured easily by adding and delet- through device-specific optimal valve control. High reproducibility and repeatability with Advanced...

SMALLEST & LIGHTEST IN THE WORLD I 4 independent measurement ports and one dedicated port for saturated vapor pressure measurements I Dedicated pressure transducers for each ports I High-precision measurement with AFSMTM I Quick BET mode for high throughput I Simultaneous control of up to 20 measurement ports via multi-device control (5 units) I IoT: Process monitoring via e-mail notification system I Gas adsorption isotherm & NET adsorption measurement through AFSMTM2 without the need of He-gas I Optional micropore analysis by molecular probe method I Optional FDA 21 CFR Part 11 compliance

BELSORP MINI X Features The BELSORP MINI X is available as 3 or 4 port model Specific surface area range: I 0.01 m²/g or more (N2) Pore size distribution range: I 0.7 to 500 nm (opt. ~0.35 nm) Three modes are available: I High-precision mode for R&D I Quick BET mode for QC I Multi-sample mode and GDO for high throughput Microtrac MRB’s BELSORP MINI X shows out- measurement progress, grasping the mainte- ment status. The result will be saved as a report standing features resulting into the world’s nance timing, and sending the measurement which summarizes leakage rates, the function- highest...