NH3 selective catalytic reduction (SCR) of nitrogen oxides (NO x ) over activated sewage sludge char

Abstract

The de-NO x performance of sewage sludge chars activated physically using water vapor or chemically using KOH was evaluated. Characteristics of chars activated under different activation temperatures, water vapor concentrations, and KOH/char ratios were analyzed by N 2 adsorption-desorption and FT-IR. Chemically activated chars were more efficient in removing NO x due to their higher surface area, oxygen functional group and NH 3 adsorption than physically activated chars. The de-NO x performance of the activated chars is influenced more by chemical properties such as oxygen functional groups and NH 3 adsorption sites than by physical properties like specific surface area and pore volume.

Research on biocharviaa comprehensive scientometric approach

“…Biochar, an alternative name for charcoal, is used widely in several areas, e.g., fuel energy. Biochar has many applications, which include solid biofuel, 7-9 carbon sequestration, 10 water or air pollutant adsorbents, [11][12][13][14] catalysts, [15][16][17] and soil amendments. 18 With the development of science and technology, people living in this age (the big data era) are surrounded by an incredible amount of information and usually have much more and easier methods to get information than they did several decades before.…”

Selective catalytic reduction of NOx using RDF char and municipal solid waste char based catalyst

“…In order to investigate the effect of MnO x , which has been reported to have a high de-NO x efficiency in lowtemperature SCR processes, the char samples were impregnated with a Mn(NO 3 ) 2 water solution using the incipient wetness method [10,11,13]. Each 5-g sample was impregnated with 10 wt.% Mn and then dried in an oven at 100°C for 2 h. The impregnated char was thermally treated for 3 h at 350°C to convert the Mn into MnO x and to remove any impurities.…”

“…The carbon material used for the CSCR process can be modified by simple treatments for the incorporation of oxygen functional groups on its surface. The oxygen functional groups assist the chemical adsorption of NO x , enhancing de-NO x efficiency at low temperatures [9][10][11]. Many different kinds of carbon materials are produced: activated carbon, activated carbon fiber, carbon nanotube, and carbon black, etc.…”

Influences of activation agent impregnated sewage sludge pyrolysis on emission characteristics of volatile combustion and De-NOx performance of activated char

“…Moreover, the target products from pyrolysis are miscellaneous. For example, biochar [7], adsorbents [8][9][10], or catalysts [11][12][13] are the potential valuable products derived from char. The combustible volatile (oil and gas) generated in the pyrolysis process maybe burned online to supply energy to the pyrolysis reactor [4,14,15], thus reducing or avoiding commercial fuel consumption and achieving an energy-saving disposal.…”