Fuel-lean VOCs combustion in a porous burner stacked with alumina balls: A case for ethylene combustion

Abstract

Summary A porous burner stacked in turn with 3‐ and 9‐mm alumina pellets was established to perform C2H4 combustion experiments by acquiring the flammable limits, temperature variation characteristics, combustion wave velocity, pollutant emissions, and treatment efficiency. The burner operated well at equivalence ratios within 0.3 to 0.7. Larger alumina pellets widened the burner's lower flammable limit. As the flame propagated downstream, the higher premixed gas flow velocity and larger alumina pellets, the higher combustion wave velocity, whereas the circumstances were opposite as the flame spread upstream. The combustion temperature increased with the equivalence ratio and premixed gas flow velocity. In response to the effect of the alumina pellet dimension, 3‐mm alumina pellets corresponded to higher combustion temperatures, lower CO emissions, and higher treatment efficiency than those less than 9‐mm conditions.

Experimental study of volatile organic compounds catalytic combustion on Cu‐Mn catalysts with different carriers

“…Since the performances of the catalysts and the catalytic oxidation characteristics of benzene are reflected directly by the change of benzene content in the catalyst bed air flow at different catalytic temperatures, the performance indexes of each catalyst are quantitatively analyzed from the testing results and benzene conversion rate is calculated in the following for formula (1). where ω i is conversion rate of benzene in catalyst i, %; c j i is the benzene concentration on i catalyst at different temperatures j, mg/m 3 ; c 0 i is the initial concentration of benzene in i catalytic reaction, mg/m 3 .…”

“…With the saturated vapor pressure not less than 70 Pa at ambient temperature and the boiling point below 260 C at atmospheric pressure, VOCs is a sort of toxic and harmful organic substance. 1 The source of VOCs is becoming more extensive and complex with large scale and speed of social industrialization. Crude oil smelting, automobile spraying, fuel combustion, chemical production, solvent manufacturing, drug production, etc., are the key sources of VOCs emission, 2 in which the industry contribution accounted for more than 50%.…”

“…In recent years, the enormous emission of volatile organic compounds (VOCs) has brought formidable challenges to sustainable development of the whole world. With the saturated vapor pressure not less than 70 Pa at ambient temperature and the boiling point below 260°C at atmospheric pressure, VOCs is a sort of toxic and harmful organic substance 1 . The source of VOCs is becoming more extensive and complex with large scale and speed of social industrialization.…”

Computational investigation of multi hydrogen jets at inclined supersonic flow

“…This technique allows scholars to increase the velocity of current aerospace vehicles and civil aircraft. [1][2][3][4] Due to the numerous advantages of this engine, the efficiency development of this engine become prominent for scientists and scholars. Therefore, they have always tried to modify and enhance the current scramjet engine for the cheaper and less time-consuming flight transportation.…”

“…The importance of the scramjet engine as the most reliable method for high‐speed flight has considerably grown in the last decades. This technique allows scholars to increase the velocity of current aerospace vehicles and civil aircraft 1‐4 . Due to the numerous advantages of this engine, the efficiency development of this engine become prominent for scientists and scholars.…”