Abstract: Selective non-catalytic reduction (SNCR) is a cost-effective technology for flue gas denitrification. The use of ammonia as a reducing agent for the SNCR system is reviewed. The reaction mechanisms and performance parameters are presented for SNCR. Additionally，the problems that may be encountered in the operation of SNCR are also discussed. In the end，some advices are given for the application of the SNCR system.

摘要： 针对以氨为还原剂的选择性非催化还原（SNCR）系统进行综述，分析了SNCR工艺基本原理，总结了SNCR脱硝过程的各影响因素，指出了SNCR运行中的一些问题，最后对SNCR系统的应用给予建议。