SCR catalyst‐coated fabric filters for simultaneous NO<sub>x</sub> and high‐temperature particulate control

Ness, S.R.; Dunham, Grant E.; Weber, G.F.; Ludlow, Douglas K.

doi:10.1002/ep.670140125

Cited by 25 publications

(9 citation statements)

References 6 publications

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“…Ness et al (1995) achieved effective filter coating for a wide variety of catalysts, gas chemistries and filters using a sol-gel technique. Seames et al (2004) found large variability in the adherence of catalyst particles to different fabric materials using a washcoating process.…”

Section: Introductionmentioning

confidence: 99%

Mechanical milling for catalyst loading of polymer filters

Cavalli¹,

Lilke²

2009

Journal of Materials Processing Technology

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Section: Introductionmentioning

confidence: 99%

Mechanical milling for catalyst loading of polymer filters

Cavalli¹,

Lilke²

2009

Journal of Materials Processing Technology

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“…In large pulverized coal-fired power plants, SCR is the only choice to meet the Ultra-low Emission Standards. However, with the increasing of the De-NOX efficiency of SCR, the ammonia slip problem seems to be another challenge [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Investigation and Control Technology on Excessive Ammonia-Slipping in Coal-Fired Plants

et al. 2020

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After the implementation of the ultra-low emissions regulation on the coal-fired power plants in China, the problem of the excessive ammonia-slipping from selective catalytic reduction (SCR) seems to be more severe. This paper analyzes the operating statistics of the coal-fired plants including 300 MW/600 MW/1000-MW units. Statistics data show that the phenomenon of the excessive ammonia-slipping is widespread. The average excessive rate is over 110%, while in the small units the value is even higher. A field test data of nine power plants showed that excessive ammonia-slipping at the outlet of SCR decreased following the flue-gas process. After most ammonia reduced by the dust collector and the wet flue-gas desulfurization (FGD), the ammonia emission at the stack was extremely low. At same time, a method based on probability distribution is proposed in this paper to describe the relationship between the NH3/NOX distribution deviation and the De–NOX efficiency/ammonia-slipping. This paper also did some original work to solve the ammonia-slipping problem. A real-time self-feedback ammonia injection technology using neural network algorithm to predict and moderate the ammonia distribution is proposed to decrease the NH3/NOX deviation and excessive ammonia-slipping. The technology is demonstrated in a 600-MW unit and works successfully. The excessive ammonia-slipping problem is well controlled after the implementation of the technology.

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“…Most of the NO x that is formed in combustors is NO, rather than NO 2 or N 2 O. Current commercial NO x treatment methods include primarily selective catalytic reduction (SCR), although there has been some concern about the effects of these processes on the environment (Singoredjo et al, 1993;Heck et al, 1994;Ness et al, 1995). In SCR processes, ammonia is used as the reducing agent with a metal oxide catalyst at temperatures of 350 -450ºC.…”

Section: Introductionmentioning

confidence: 99%

DEVELOPMENT OF HIGH ACTIVITY, CATALYTIC SYSTEMS FOR NOx REDUCTION

UNKNOWN¹

2001

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This project was directed at an investigation of catalytic NO x reduction on carbonaceous supports at low temperatures. The experimental work was conducted primarily in a packed bed reactor/gas flow system that was constructed for this work. The analytical techniques employed were mass spectrometry, NO x chemiluminescence, and gas chromatography. The experimental plan was focused on steady-state reactivity experiments, followed by temperature programmed desorption (TPD) of surface intermediates, and also selected temperature-programmed reaction (TPR) experiments. Both uncatalyzed and catalyzed (potassium-promoted) phenolic resin char, were investigated as well as the catalytic effect of additional CO in the gas phase.

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SCR catalyst‐coated fabric filters for simultaneous NO_x and high‐temperature particulate control

Cited by 25 publications

References 6 publications

Mechanical milling for catalyst loading of polymer filters

Mechanical milling for catalyst loading of polymer filters

Investigation and Control Technology on Excessive Ammonia-Slipping in Coal-Fired Plants

DEVELOPMENT OF HIGH ACTIVITY, CATALYTIC SYSTEMS FOR NOx REDUCTION

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SCR catalyst‐coated fabric filters for simultaneous NOx and high‐temperature particulate control

Cited by 25 publications

References 6 publications

Mechanical milling for catalyst loading of polymer filters

Mechanical milling for catalyst loading of polymer filters

Investigation and Control Technology on Excessive Ammonia-Slipping in Coal-Fired Plants

DEVELOPMENT OF HIGH ACTIVITY, CATALYTIC SYSTEMS FOR NOx REDUCTION

Contact Info

Product

Resources

About

SCR catalyst‐coated fabric filters for simultaneous NO_x and high‐temperature particulate control