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On April 15th, Professor Gao Xiang, Deputy Dean of the School of Energy Engineering of Zhejiang University, and the team of Judge Cen Kejiang, after years of joint research and development of industry, education and research, won the first prize of the 2014 Zhejiang Science and Technology Progress Award at the provincial science and technology award conference
.
By adding new catalysts to more than 300 coal-fired boilers across the country, there is hope
for a significant improvement in air quality.
Tackling smog has become one of
the most concerned topics in the country.
Gao Xiang said that in China, about two-thirds of the source of nitrogen oxides - one of the main causes of atmospheric haze - is coal combustion
.
At present, the technology of removing nitrogen oxides, that is, denitration technology, which is widely used in various countries, is to let it be fully mixed with ammonia before the flue gas produced by coal combustion is discharged from the chimney, and then through several layers of catalyst, so that a magical chemical reaction occurs, and nitrogen oxides will be converted into nitrogen that is ubiquitous in the atmosphere and will not cause pollution
.
Gao Xiang pointed out that it is the catalyst
that plays a key role in this process.
Gao Xiang said that in the past, the catalysts used by Chinese companies mainly relied on imports, which were not only expensive, but also encountered some "water and soil" problems
in China.
First of all, because the proportion of inferior coal used in China is large, some catalysts are not used for long, due to wear, blockage, poisoning, etc.
resulting in inactivation, the shortest service life is only 3 months
.
In addition, China's boilers often do not always maintain full load operation, but according to the power supply or heating situation, the load fluctuation is more frequent
.
When the load is low, the temperature may not meet the requirements of the normal operation of the catalyst, which can easily lead to the shutdown of the denitration system and cause a surge
in nitrogen oxide emissions.
In order to develop a "strong" catalyst suitable for China's industrial environment, Gao Xiang's team used quantum chemistry and computer simulation to more accurately and efficiently screen out qualified catalyst formulations
from thousands of combinations of different elements.
The catalyst they finally developed has greatly improved its resistance to toxicity and wear resistance, extending the service life
of the catalyst.
The scientific research team also added rare earths and other elements to the formula, so that the catalyst has less stringent temperature requirements and can play a good role
in the low-load operation of the boiler.
On April 15th, Professor Gao Xiang, Deputy Dean of the School of Energy Engineering of Zhejiang University, and the team of Judge Cen Kejiang, after years of joint research and development of industry, education and research, won the first prize of the 2014 Zhejiang Science and Technology Progress Award at the provincial science and technology award conference
.
By adding new catalysts to more than 300 coal-fired boilers across the country, there is hope
for a significant improvement in air quality.
Tackling smog has become one of
the most concerned topics in the country.
Gao Xiang said that in China, about two-thirds of the source of nitrogen oxides - one of the main causes of atmospheric haze - is coal combustion
.
At present, the technology of removing nitrogen oxides, that is, denitration technology, which is widely used in various countries, is to let it be fully mixed with ammonia before the flue gas produced by coal combustion is discharged from the chimney, and then through several layers of catalyst, so that a magical chemical reaction occurs, and nitrogen oxides will be converted into nitrogen that is ubiquitous in the atmosphere and will not cause pollution
.
Gao Xiang pointed out that it is the catalyst
that plays a key role in this process.
Gao Xiang said that in the past, the catalysts used by Chinese companies mainly relied on imports, which were not only expensive, but also encountered some "water and soil" problems
in China.
First of all, because the proportion of inferior coal used in China is large, some catalysts are not used for long, due to wear, blockage, poisoning, etc.
resulting in inactivation, the shortest service life is only 3 months
.
In addition, China's boilers often do not always maintain full load operation, but according to the power supply or heating situation, the load fluctuation is more frequent
.
When the load is low, the temperature may not meet the requirements of the normal operation of the catalyst, which can easily lead to the shutdown of the denitration system and cause a surge
in nitrogen oxide emissions.
In order to develop a "strong" catalyst suitable for China's industrial environment, Gao Xiang's team used quantum chemistry and computer simulation to more accurately and efficiently screen out qualified catalyst formulations
from thousands of combinations of different elements.
The catalyst they finally developed has greatly improved its resistance to toxicity and wear resistance, extending the service life
of the catalyst.
The scientific research team also added rare earths and other elements to the formula, so that the catalyst has less stringent temperature requirements and can play a good role
in the low-load operation of the boiler.