湿天然气中乙烷在碱土、稀土催化剂上氧化脱氢的研究

在５５０～７００℃温度范围研究了碱土、稀土单组份催化剂对湿天然气中乙烷氧化脱氢反应的影响，结果表明，７００℃时碱土金属碳酸盐催化剂有较好活性，活性如下：ＢａＣＯ３＞ＳｒＣＯ３＞ＣａＣＯ３＞ＭｇＣＯ３。稀土氧化物催化剂中轻稀土有较好活性、选择性。添加不同阴离子催化剂表现出不同的活性，ＢａＣＯ３有较好活性，在７００℃时对乙烷转化率为４７．２１％，乙烯收率为１８．８４％。催化剂活性与其晶格氧活动性有对应关系。

Study of oxidative dehydrogenation of ethane in wet natural gas over alkaline and rare earth metal oxides

The　influences　of　alkaline and　rare earth　metal　oxide　catalysts　on　oxidative　dehydrogenation　of　ethane　in　wet　natural　gas　have　been　investigated　at　500～700℃.　It　is　found　that　the　carbonic　salts　of　alkaline earth　metals　as　mono component　catalysts　have　good　activities　in　the　order:BaCO_3>SrCO_3>CaCO_3>MgCO_3.As　for　rare earth　metal　oxides,　La_2O_3　gives　better　activity　and　selectivity.The　catalyst　exhibit　different　activities with　different　anions.The　experimental　results　show　BaCO_3　has　best　activity,　with　C_2H_6　conversion　and　C_2H_4　yield　being　47.21%　and　18.84%,　respectively,　at　700℃.　Catalyst　activity　increases　with　lattice　oxygen　mobility.