an efficient separation of n 2 o/co 2 Silver-exchanged molecular sieve adsorbent and preparation method thereof
A molecular sieve and adsorbent technology, which is applied in the field of silver-exchange molecular sieve adsorbent for efficiently separating N2O/CO2 and its preparation field, can solve problems such as difficulty in separation, and achieve the effects of simple preparation method, good stability and good application prospect.
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Embodiment 1
[0030] An efficient separation of N 2 O / CO 2 The preparation method of the silver-exchange molecular sieve adsorbent is realized by the following steps:
[0031] (1) Add 1g of 13X molecular sieve to 60mL of 0.1mol / mL AgNO 3 In the aqueous solution, heat and stir at 80 °C for 1 h to perform a silver exchange, and keep the total amount of the solution unchanged during the heating process;
[0032] (2) Wash the silver-exchanged molecular sieve in step (1), wash with deionized water, filter, and dry at 120 °C for 24 h to obtain silver-exchanged 13X molecular sieve;
[0033] (3) The silver-exchanged 13X molecular sieve obtained in step (2) was vacuum-activated at 200 °C for 5 h to obtain Ag + X-2 molecular sieve adsorbent with an exchange degree of 84%; then test the N of the X-2 molecular sieve 2 O / CO 2 gas adsorption separation performance.
Embodiment 2
[0035] An efficient separation of N 2 O / CO 2 The preparation method of the silver-exchange molecular sieve adsorbent is realized by the following steps:
[0036] (1) Add 1g of 5A molecular sieve to 60mL of 0.1mol / mL AgNO 3 In the aqueous solution, heat and stir at 80 °C for 1 h to perform a silver exchange, and keep the total amount of the solution unchanged during the heating process;
[0037] (2) washing the silver-exchanged molecular sieve in step (1), washing with deionized water, filtering, and drying at 120 °C for 24 h to obtain silver-exchanged 5A molecular sieve;
[0038] (3) The 5A molecular sieve obtained in step (2) was vacuum-activated at 200 ° C for 5 h to obtain Ag + A-2 molecular sieve adsorbent with an exchange degree of 73%; then test the N of A-2 molecular sieve 2 O / CO 2 gas adsorption separation performance.
Embodiment 3
[0040] An efficient separation of N 2 O / CO 2 The preparation method of the silver-exchange molecular sieve adsorbent is realized by the following steps:
[0041] (1) Add 1g of 13X molecular sieve to 70mL of 0.3mol / mL AgNO respectively 3 The solution was then heated and stirred at 60 °C for 2 hours to perform a silver exchange, and the total amount of the solution was kept unchanged during the heating process;
[0042] (2) The silver-exchanged molecular sieve in step (1) was washed with deionized water, filtered, and dried at 100 °C for 24 h to obtain silver-exchanged 13X molecular sieve;
[0043] (3) The silver-exchanged 13X molecular sieve obtained in step (2) was vacuum-activated at 180 °C for 10 h to obtain Ag + X-3 molecular sieve adsorbent with an exchange degree of 88%; then test the N of X-3 molecular sieve 2 O / CO 2 gas adsorption separation performance.
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