VDSorb-91i multifunction temperature programmed chemisorption analyzer Introduction multifunction temperature programmed chemisorption analyzer dynamic chemisorption for realization of the principle that when certain materials or pre-adsorbed gas (or vapor) of the material, in the analysis of the carrier gas flow or a certain proportion of When the gas stream is heated at a constant heating rate, detecting changes in the gas flowing through the composition and concentration of the material to reflect the changes in the physical and chemical properties of the material surface. Study of catalysts, such as metal dispersion, the active metal surface area, H2 / CO2, etc. the amount of adsorption-desorption, the acid (base) and the center of the intensity distribution of the number can be achieved by this method. Features * TPD TPD * TPR TPR * temperature programmed oxidation TPO * HOT * chemical pulse adsorption temperature-programmed surface reaction surface area analysis flow method TPSR * * Custom Performance Analysis Model Technical parameters: Reproducibility: ≤0.5% test accuracy: - Accuracy: ± 1 ℃; - Repeatability: ± 1 ℃ reactor; - linear program -100 ℃ to 1100 ℃ heating (-100 ℃ low temperature generator requires optional); - heating rate: 0 ~ 100 ℃ / min; - forced cooling rapid cooling; - equipped with two temperature points; mass flow meter (MFC) -0 ~ 100ml / min (standard) .- Accuracy: 0.35% FS Thermal Conductivity Detector (TCD): - Maximum temperature: 200 ℃ - Temperature accuracy: <0.1 ℃ - Baseline Noise: <30μA- baseline drift: <50μA / 30min pipe insulation body: Temperature range: room temperature ~ 250 ℃ steam generator: - Maximum temperature: 300 ℃ cold trap station: - Temperature range: -196 ℃ ~ room Dewar: - Capacity: 1L reactor: -U-type quartz reactor Loop Ring: - Specifications: 0.5ml, 1ml, 2ml gas interface: - Three independent road Treatment gas interface - three independent Pretreatment / Blend / Carrier gas interface; the functional characteristics - compact, convenient placement; - computing meter Ethernet connection, convenient; - experimental operation is simple, flexible, complex test procedures; - gas path optimization to ensure minimal dead volume system piping, and enhance the detection sensitivity; - systems for temperature, automatic synchronization signal; - with a variety of specifications cold trap buffer, short ring, depending on the experimental flexible use; - Automatic lift reactor, the entire analysis process to achieve fully automated operation, but also facilitate the rapid cooling; - the rapid flow method Dewar automatic lifting surface area; - equipped with forced cooling system to achieve rapid cooling from high temperature reactor; - Key non-condensing gas path points insulation, ensure the feasibility of steam adsorption; - mass flow meter to precisely control the flow of gas each way, to ensure reproducibility of experimental results and authenticity; - high sensitivity thermal conductivity detector to capture changes in trace gas concentrations; - Built-in gas mixer, available online concentration ratio analysis of a variety of gases, saving the cost of purchasing gas mixture; - a variety of specifications Loop ring, you can choose the appropriate depending on the amount of adsorption Loop ring in order to improve the accuracy of analysis; - Built-in manual calibration , providing an accurate basis for quantitative analysis; - Multiple internal expansion interface, you can choose according to need to connect mass spectrometry, gas chromatography, infrared spectroscopy and other instruments from different locations; VDSorbStation workstations with powerful data acquisition and processing functions to achieve the experimental procedure Custom editing, automatically determine the experimental peak, edit, experimental peak automatic overlay, automatic calculation of the peak area obtained experimental results; a special service, two years of free warranty; 2, free software upgrades; 3, Lifetime Replacement parts; 4, free site installation, commissioning, technical training;