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óïëîòíåíèÿ<br />
çàïîëíÿþò ìåçîïîðû â äèàïàçîíå äèàìåòðîâ 50÷150 A, â<br />
ðåçóëüòàòå ÷åãî îáúåì ïîð â ýòîé îáëàñòè ñíèæàåòñÿ.<br />
Òàáëèöà 2. Òåêñòóðíûå õàðàêòåðèñòèêè êàòàëèçàòîðîâ ñåëåêòèâíîãî<br />
ãèäðèðîâàíèÿ<br />
Îáúåì ïîð â îáëàñòè äèàìåòðîâ ïîð (A)<br />
Îáðà<br />
çåö<br />
S óä ,<br />
ì 2 /ã<br />
V ï ,<br />
ñì 3 /ã<br />
32÷50 50÷100 100÷150 >150<br />
ñì 3 /ã % ñì 3 /ã % ñì 3 /ã % ñì 3 /ã %<br />
À 160 0.481 0.056 11.6 0.149 31.0 0.189 39.3 0.087 18.1<br />
 131 0.424 0.026 6.1 0.114 26.9 0.183 43.0 0.102 23.9<br />
Ñ 128 0.448 0.022 4.9 0.107 23.8 0.171 38.1 0.149 33.2<br />
123
óïëîòíåíèÿ çàïîëíÿþò ìåçîïîðû â äèàïàçîíå äèàìåòðîâ 50÷150 A, â ðåçóëüòàòå ÷åãî îáúåì ïîð â ýòîé îáëàñòè ñíèæàåòñÿ. Òàáëèöà 2. Òåêñòóðíûå õàðàêòåðèñòèêè êàòàëèçàòîðîâ ñåëåêòèâíîãî ãèäðèðîâàíèÿ Îáúåì ïîð â îáëàñòè äèàìåòðîâ ïîð (A) Îáðà çåö S óä , ì 2 /ã V ï , ñì 3 /ã 32÷50 50÷100 100÷150 >150 ñì 3 /ã % ñì 3 /ã % ñì 3 /ã % ñì 3 /ã % À 160 0.481 0.056 11.6 0.149 31.0 0.189 39.3 0.087 18.1  131 0.424 0.026 6.1 0.114 26.9 0.183 43.0 0.102 23.9 Ñ 128 0.448 0.022 4.9 0.107 23.8 0.171 38.1 0.149 33.2 123
ÔÎÐÌÈÐÎÂÀÍÈÅ MoVTe ÎÊÑÈÄÍÎÃÎ ÊÀÒÀËÈÇÀÒÎÐÀ ÑÅËÅÊÒÈÂÍÎÃÎ ÏÐÅÂÐÀÙÅÍÈß ÏÐÎÏÀÍÀ Èùåíêî Å.Â., Àíäðóøêåâè÷ Ò.Â., Ïîïîâà Ã.ß., Ïëÿñîâà Ë.Ì., ×åñàëîâ Þ.À. Èíñòèòóò êàòàëèçà èì. Ã.Ê. Áîðåñêîâà ÑÎ ÐÀÍ, Íîâîñèáèðñê E-mail: lazareva@catalysis.nsk.su Èññëåäîâàíû óñëîâèÿ ôàçîîáðàçîâàíèÿ â MoVTe-îêñèäíîé ñèñòåìå. Ïîêàçàíî, ÷òî íåçàâèñèìî îò èñõîäíûõ ñîåäèíåíèé òåëëóðà è âàíàäèÿ îáðàçóþòñÿ ãåêñàãîíàëüíàÿ ôàçà Ì2, TeMo 5 O 16 , è ñëîèñòûå ñòðóêòóðíî ðîäñòâåííûå V-Mo ñîåäèíåíèÿ. Ñîîòíîøåíèå ýòèõ ôàç îïðåäåëÿåòñÿ îêèñëèòåëüíî-âîññòàíîâèòåëüíûìè óñëîâèÿìè òåðìîîáðàáîòêè. Êàòàëèòè÷åñêèå ñâîéñòâà â ðåàêöèè îêèñëèòåëüíîãî àììîíîëèçà ïðîïàíà îïðåäåëÿþòñÿ ïðèðîäîé èñõîäíîãî ñîåäèíåíèÿ âàíàäèÿ è óñëîâèÿìè òåðìîîáðàáîòêè. Ìîäèôèöèðîâàííûå òåëëóðîì è íèîáèåì V-Mo-îêñèäíûå êàòàëèçàòîðû ÿâëÿþòñÿ îäíèìè èç ñàìûõ ýôôåêòèâíûõ êàòàëèçàòîðîâ ñåëåêòèâíîãî ïðåâðàùåíèÿ ïðîïàíà [1]. Öåëü äàííîé ðàáîòû – âûÿñíåíèå ðîëè òåëëóðà â ôîðìèðîâàíèè ôàçîâîãî ñîñòàâà V-Mo-îêñèäíûõ êàòàëèçàòîðîâ è åãî âëèÿíèÿ íà êàòàëèòè÷åñêèå ñâîéñòâà â ðåàêöèè îêèñëèòåëüíîãî àììîíîëèçà ïðîïàíà. MoVTe (Mo:V:Te = 1:0.3:0.23) îêñèäíûå êàòàëèçàòîðû ïîëó÷àëè ñìåøåíèåì âîäíûõ ðàñòâîðîâ èñõîäíûõ ðåàãåíòîâ ñ ïîñëåäóþùèì âûïàðèâàíèåì ðàñòâîðà èëè ñóñïåíçèè äî ñóõîãî ñîñòîÿíèÿ.  êà÷åñòâå èñòî÷íèêà ìîëèáäåíà èñïîëüçîâàëè ïàðàìîëèáäàò àììîíèÿ, èñòî÷íèêà âàíàäèÿ – ñóëüôàò âàíàäèëà, îêñàëàò âàíàäèëà èëè ìåòàâàíàäàò àììîíèÿ, èñòî÷íèêà òåëëóðà – îêñèä òåëëóðà è òåëëóðîâóþ êèñëîòó. Òåðìîîáðàáîòêó êàòàëèçàòîðîâ ïðîâîäèëè â èíòåðâàëå òåìïåðàòóð 300-600 î Ñ â ïîòîêå ãåëèÿ, âîçäóõà èëè ðåàêöèîííîé ñìåñè. Êàòàëèòè÷åñêèå ñâîéñòâà èññëåäîâàëè â ïðîòî÷íîé óñòàíîâêå ñ ïîëíûì õðîìàòîãðàôè÷åñêèì àíàëèçîì âñåõ ïðîäóêòîâ ðåàêöèè. Êàòàëèòè÷åñêóþ ðåàêöèþ ïðîâîäèëè ïðè òåìïåðàòóðå 420 î Ñ â ðåàêöèîííîé ñìåñè ñ ìîëÿðíûì ñîîòíîøåíèåì ðåàãåíòîâ Ñ 3 Í 8 /NH 3 /âîçäóõ = 1/1.2/15. Ôàçîâûé ñîñòàâ êàòàëèçàòîðîâ èññëåäîâàëè ìåòîäàìè ðåíòãåíîôàçîâîãî àíàëèçà è Ôóðüå ÈÊ-ñïåêòðîñêîïèè. 124
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