【答案】-41.8;BC;
;隨
增大,NH
3濃度增大,NO還原反應(yīng)速率加快,脫硝效率上升。但NH
3濃度太高時,NO濃度太小,NO還原反應(yīng)速率也減小,脫硝效率下降(或隨
增大,NO還原反應(yīng)是主導(dǎo)反應(yīng),但NH
3濃度太高時,NO濃度太小,氨氧化反應(yīng)占據(jù)了主導(dǎo)地位,產(chǎn)生了更多的NO);能提高NO轉(zhuǎn)化率;2SO
2+4NH
3+O
2+2H
2O=2(NH
4)
2SO
4(或2SO
2+2NH
3+O
2+2H
2O=2NH
4HSO
4);A;0.03%