| 摘要 |
Urea mixtures and methods for making and using same are provided. The urea mixture can be used as a formaldehyde scavenger for composite lignocellulose products that contain formaldehyde-based resins and as a selective non-catalytic reduction (”SNCR”) reagent for reducing oxidized nitrogen species from combustion effluents. In at least one specific embodiment, the urea mixture can include urea, a urea-aldehyde resin, a liquid medium, and a sugar. The urea mixture can have an aldehyde to urea molar ratio of about 0.2:1 to about 0.7:1. The urea mixture can have a sugar concentration of about 2 wt% to about 8 wt%, based on the combined weight of the urea, the urea-aldehyde resain, the liquid medium, and the sugar. |
