BET Surface Area|Porosity Analyzer|Gas Pycnometer Helium True Density Equipment|High Pressure Volumetric Analyzer| Langmuir/BET/Gibbs/BJH/MP/SF/DR/DA/HK/T-Plot Analyzer
H-Sorb2600 High Pressure Volumetric Analyzer Assists Virginia Tech Successfully Published One Paper on Greenhouse Gases Science and Technology
Technology Articles-BET surface area, BJH pore size distribution, Gas Pycnometer true density
2016年4月25日星期一
2016年3月22日星期二
A Gas Adsorption Demo Lab Established by Gold APP Instruments China and Iowa State University
Gold APP Instruments Corporation China
had coordinated with ISU (Iowa State University) to established one gas
adsorption demo lab on campus of ISU. Professor Mufit Akinc from the Materials
Science & Engineering said they had already well installed and calibrated
all demo analyzers (gas pycnometer density analyzer G-DenPyc 2900 & BET
surface area and porosimetry analyzer V-Sorb 2800P) with helps from GAPP
engineer, were ready to receive visitors to go this lab to view analyzers
onsite, to test their samples and value instruments quality.
had coordinated with ISU (Iowa State University) to established one gas
adsorption demo lab on campus of ISU. Professor Mufit Akinc from the Materials
Science & Engineering said they had already well installed and calibrated
all demo analyzers (gas pycnometer density analyzer G-DenPyc 2900 & BET
surface area and porosimetry analyzer V-Sorb 2800P) with helps from GAPP
engineer, were ready to receive visitors to go this lab to view analyzers
onsite, to test their samples and value instruments quality.
read more by clicking to view details.
BET Surface Area|Porosity Analyzer|Gas Pycnometer Helium True Density Equipment|High Pressure Volumetric Analyzer| Langmuir/BET/Gibbs/BJH/MP/SF/DR/DA/HK/T-Plot Analyzer
2016年1月7日星期四
Specific Surface Area and Porosity Analyzer Exported to Canada Manson Environmental Corporation
Gold APP Instruments
Corporation China had export one set volumetric specific surface area and
porosity analyzer to Canada catalyst manufacturer--Manson Environmental
Corporation. This is the first set Chinese brand analyzer came into Canada
market.
Manson Environmental
Corporation is an inorganic chemicals manufacturer in Oakville. This private
company was founded in 1986.
2015年1月28日星期三
porosimetry technique by Gold APP Instruments China
Porosimetry is
an analytical technique used to determine various quantifiable
aspects of a material's porous nature, such as pore diameter,
total pore volume, surface
area, and bulk and absolute densities.
The technique involves the intrusion of
a non-wetting liquid (often mercury) at high pressure into
a material through the use of a porosimeter. The pore size can be
determined based on the external pressure needed to force the liquid into a
pore against the opposing force of the liquid's surface
tension.
A force balance equation known as
Washburn's equation for the above material having cylindrical pores is given
as:
PG= pressure of gas
O= surface tension of liquid
日= contact angle of intrusion liquid
DP= pore diameter
Since the technique is usually done
under vacuum, the gas pressure begins at zero. The contact
angle of mercury with most solids is between 135° and 142°,
so an average of 140° can be taken without much error. The surface
tension of mercury at 20 °C under vacuum is 480 mN/m. With the
various substitutions, the equation becomes:
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2013年11月17日星期日
2013年11月13日星期三
Capilliary condensation introduction and relation with pore size distribution
Figure 1: An example of a porous structure
exhibiting capillary condensation.
Figure 2: Capillary condensation profile
showing a sudden increase in adsorbed volume due to a uniform capillary radius
(dashed path) among a distribution of pores and that of a normal distribution
of capillary radii (solid path)
GOLD APP INSTRUMENTS
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Adsorption isotherm--GOLD APP INSTRUMENTS
Adsorption isotherm
Adsorption isotherm is the relationship
between the pressure and adsorption amount at a constant temperature. The
horizontal axis is the relative pressure (P/P0) which is the
equilibrium pressure divided by the saturation pressure. The relative pressure
can be 0 to 1 and P/P0 =1.0 means that the condensation of
adsorptive occurs in the sample cell. So an adsorption isotherm is the
measurement of adsorptive density which becomes higher than the than the bulk
(gas) phase density due to the interaction between the adsorptive and solid
surface atoms below its condensation pressure. Adsorption amount in the
vertical axis is commonly expressed as V/ml(STP)g-1 which is expressed
by the standard gas volume (at 0oC and 1 atm).
The figure indicates the classification of
adsorption isotherms defined by IUPAC. The type of adsorption isotherm is
determined by the pore size and surface character of the material.
I : Microporous materials
(e.g. Zeolite and Activated carbon)
II : Non porous
materials (e.g. Nonporous Alumina and Silica)
III : Non porous
materials and materials which have the weak interaction between the adsorbate
and adsorbent (e.g. Graphite/water)
IV : Mesoporous
materials (e.g. Mesoporous Alumina and Silica)
V : Porous
materials and materials that have the weak interaction between the adsorbate
and adsorbent (e.g. Activated carbon/water)
VI : Homogeneous
surface materials (e.g. Graphite/Kr and NaCl/Kr)
GOLD APP INSTRUMENTS
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