發(fā)布時(shí)間：2018-05-28 11:23

  本文選題：β分子篩 + 孔結(jié)構(gòu)　； 參考：《分子催化》2017年03期

【摘要】：采用Na OH水溶液對(duì)β分子篩進(jìn)行堿處理,利用XRD、N_2-Physisorption、XRF、NH_3-TPD及SEM等表征手段,使用苯與苯甲醇為反應(yīng)物進(jìn)行傅-克烷基化反應(yīng),對(duì)堿處理前后β分子篩的物性和反應(yīng)性能進(jìn)行了研究.實(shí)驗(yàn)結(jié)果表明:隨著堿處理程度的加深,β分子篩的孔徑增大,催化劑外比表面積顯著增加,β分子篩的弱酸強(qiáng)度和弱酸總量有所下降,由此帶來(lái)的反應(yīng)結(jié)果是苯甲醇的轉(zhuǎn)化率顯著提高.對(duì)于孔徑最大的催化劑,在常壓下80℃時(shí)進(jìn)行反應(yīng),當(dāng)反應(yīng)時(shí)間為140 min時(shí),苯甲醇的轉(zhuǎn)化率已達(dá)到100%,選擇性有所提高.
[Abstract]:尾 molecular sieve was treated with NaOH aqueous solution. The physical properties and reaction properties of 尾 molecular sieve were studied by means of XRDX N, XRF NH 3-TPD and SEM. Benzene and benzyl alcohol were used as reactants for Friede-gram alkylation. The experimental results show that with the deepening of alkali treatment, the pore size of 尾 molecular sieve increases, the specific surface area of catalyst increases significantly, and the weak acid strength and the total amount of weak acid of 尾 molecular sieve decrease. As a result, the conversion of benzyl alcohol was significantly increased. For the catalyst with the largest pore size, the conversion of benzyl alcohol has reached 100 and the selectivity has been improved when the reaction time is 140 min and the reaction temperature is 80 鈩，

本文編號(hào)：1946515