尿素的水解反应如下:CO(NH2)2+H2Orarr;2NH3+CO2 无酶存在时反应的活化能为120kJmiddot;mol-1。当尿素酶存在时,反应的活化能降为46kJmiddot;mol-1。设有、无酶存在时反应的频率因子A值相同。 试计算: (1)在298K时,由于尿素酶的催化作用,反应速率是无酶存在时的多少倍? (2)无酶存在时,温度要升高到...
(ppscaa)frroiainrnmglFoewiwtgeie.rt rsh3,,qSasuini.andnctteihtteiheVes eoagtfoaGrmdei'swclshaiwezneisscoofofmltlphoaewrPeeddb in all composition range connecting linearly As such, the linearity connecting the lattice pthaeralmatteitceerspaforarmtheetePrbo-fI-thPeb,MPAb-PIb-SIn3 a, nodr...
NH3. (a) PTND3 sensor in air, (b) bPpa-dtnyNEdpqPeousfT,aoTtiiOxioOy2ngN2seN(nP1sPi–oas2nc)ostafi(vrnOeea2ltna−hyo)eefcicrab.oneHrrrpeserns(opcsmeeoenpthdrtleeiynaricgentsrtiioeesrtanaacsnctti2cow)en, oiswtf6h4ht,6Nhi5ce.HhP3lTeaaNnddDinr3egastedonilsayonrredsleewacisrfee...
aHTthi3cPiswbiIon3rtkeinrpmweerafdtoeirarmteveapdphowarsi,tewhwhtiaemsreael-asrnoesdionilstvceeordmvXeerRdedDiatbaeynpdChhealrsliiesptwsioaanmssefeottruyan,l1idn9.awMnhdoircsehuoptvwpeoro,sdLeidefgfetuoryebneett hanyddraatseuditceroyfsctaolnlivniencpihnagsdesegorfaCdHati3oNnHe3qPubaIt3i,oin....
nhaeetbohgspefeeynnHrceoaerlCbayotssfNiieoHsnno2dOcfoupef[1ryH2iornr,Cf1og8NlHe,2.ti3hIn2]tO.e p[y1r2r,o17le] pyrolysisthperporceessesn.ce of H2O is higher than in the absence of H2O [12,17] (details in Figure 1), which indicates that H2O can inhibit the formation of HCN ...
Isnuscuhc chacsaess,e so,noen sehsohuoldu lodbotabitna itnheth reatrea tceoecfofeicfifiecnitesn tthsrtohuroguhg dhetdaeilteadil ekdinkeitnice tmicomdeoldinegli nogf tohfe tmheeamseuaresudr NedHN2(Ht) 2p(rt)ofpilreosfi. lIens .aIdndaitd...
(eEenErLepSo)rtaednathlaytsMisoOin3 cFanigpularyeth5ecrorleevoef aalperdecutrhsoartotnhtehreeFTisO asubhsitgrahtesconcen Mo aainst sldotawSblteeemalenpmderdaeotnuertsesns oitont pbteahrsteuiclfisuphraietzelelidnointfhtoethMreeaocSMt2i.oIOn-n2ev5the0enonwtahhenernohptahnaedrt,teSimcnlOpee2s...
aNhTnehOdeN+NN-HOO-H2s+atsrtOter2te25ct0ahcthi◦n2iCng5gf0ovv°riCbi6br0rafoamtitroiio6nnn0. peaks appeared in the range of 3400–3100 cm−1 after NO was introduced for two min. However, in Figure 5(b), NH3 adsorption peaks appeared after NH3 was introduced for 10 min in the...
When the oxygen content of the exhaust is below 5%, the catalytic reduction reaction of NH3 can be carried out to convert NOx into N2 and H2O. When the oxygen concentration is too high, the activity of the catalyst will be reduced, and NH3 will be oxidized to NO2, resulting in new ...
However, it is well-known that pure iron oxide had no activity in N2 photofixation. To overcome this bottleneck, several researchers have employed a various method in the synthesis of defect iron catalyst. Tennakone [34] and his co-worker reported the first system of N2 reduction using ...