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liwentao2010: ½ð±Ò+3, лл»ØÌû£¬ÐÁ¿à 2015-05-05 12:23:18
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sunyujiaq: ½ð±Ò+5, ¡ï¡ï¡ïºÜÓаïÖú 2015-05-05 09:30:49
liwentao2010: ½ð±Ò+3, лл»ØÌû£¬ÐÁ¿à 2015-05-05 12:23:18
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ÎÒ×ö¹ý,»¶Ó²Î¿¼! Applied Catalysis A: General, Volume 352, Issues 1¨C2, 15 January 2009, Pages 259-264 Fuel, Volume 86, Issues 17¨C18, December 2007, Pages 2707-2713 Applied Catalysis A: General, Volume 304, 10 May 2006, Pages 49-54 One hundred milligrams of sample was placed in a quartz tubular reactor and pretreated at 500 C with an argon flow of 30 mL/min for 1 h and then cooled to 50 C. Ammonia (20% NH3/Ar) was introduced at a flow rate of 30 mL/min for 0.5 h at 50 8C, and then blown by an argon steam until a constant TCD level was attained; the reactor temperature was programmed to increase at a ramp rate of 10 C/min, and the amount of ammonia in effluent was measured via TCD and recorded as function of temperature. |
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