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¡¾ÇóÖú¡¿ÎÄÏ×ÖеÄButane ElutionÊÇʲôÒâ˼ ÒÑÓÐ1È˲ÎÓë
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¸÷λ´óÏÀ£¬ÇëÎÊÎÄÕÂÖеÄÕâÒ»¶Î´ß»¯±íÕ÷ÊÇʲôÒâ˼£¿¸Ã±íÕ÷ÊÇÓÃÀ´±íÕ÷´ß»¯¼ÁµÄtransportµÄÐÐΪ£¬±¾ÈËʵÔÚ²»¶®£¬Çë´ó¼Ò¶à¶àÖ¸µã Butane Elution. Elution experiments of butane isomers were carried out at ambient pressure in a quartzmicroreactor (4mmi.d.) coupled to an Omnistar GSD 320 O1 (Pfeiffer Vacuum) quadrupole mass spectrometer (MS) for online gas analysis. The zeolite (50 mg, sieve fraction 150-300 ¦Ìm) was loaded between two layers of quartz wool and rested over a porous frit. The sample was pretreated in argon (100 cm3 min-1) at 623 K for 30 min and cooled down in the same gas to 363 K. Then, a mixture of 100 Pa n-butane (or i-butane) in Ar (100 cm3 min-1) was introduced. The monitored atomic mass unit was 43 for both alkanes. After about 30 min the MS signal was stable. Then, the flow was switched back to pure argon (100 cm3 min-1) and the elution of the hydrocarbon from the zeolite was followed. |
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