石油与天然气化工
石油與天然氣化工
석유여천연기화공
CHEMICAL ENGINEERING OF OIL AND GAS
2015年
4期
59-64
,共6页
Hβ分子筛%多级孔%催化裂化轻汽油%醚化%碱处理
Hβ分子篩%多級孔%催化裂化輕汽油%醚化%堿處理
Hβ분자사%다급공%최화열화경기유%미화%감처리
Hβzeolite%hierarchical porous%FCC light gasoline%etherification%alkali treatment
采用NaO H溶液对Hβ分子筛进行碱处理，得到了含有多级孔的 Hβ分子筛，并用XRD、SEM 、N2吸附脱附、N H3‐T PD、Py‐IR等手段对处理前后的分子筛进行表征，在小型固定床反应器上进行了醚化反应研究，考察了反应工艺条件对其醚化性能的影响。实验结果表明，碱处理可以在保持 Hβ分子筛晶体结构的同时，增加介孔体积和比表面积，增加中强酸和B酸酸量，因而提高了醚化活性。在温度为70℃、空速为1h－1、醇烯物质的量比为1．1、反应压力为0．9MPa条件下，催化裂化轻汽油的叔碳烯烃转化率可达67．49％，比商业 Hβ分子筛提高11．7％。
採用NaO H溶液對Hβ分子篩進行堿處理，得到瞭含有多級孔的 Hβ分子篩，併用XRD、SEM 、N2吸附脫附、N H3‐T PD、Py‐IR等手段對處理前後的分子篩進行錶徵，在小型固定床反應器上進行瞭醚化反應研究，攷察瞭反應工藝條件對其醚化性能的影響。實驗結果錶明，堿處理可以在保持 Hβ分子篩晶體結構的同時，增加介孔體積和比錶麵積，增加中彊痠和B痠痠量，因而提高瞭醚化活性。在溫度為70℃、空速為1h－1、醇烯物質的量比為1．1、反應壓力為0．9MPa條件下，催化裂化輕汽油的叔碳烯烴轉化率可達67．49％，比商業 Hβ分子篩提高11．7％。
채용NaO H용액대Hβ분자사진행감처리，득도료함유다급공적 Hβ분자사，병용XRD、SEM 、N2흡부탈부、N H3‐T PD、Py‐IR등수단대처리전후적분자사진행표정，재소형고정상반응기상진행료미화반응연구，고찰료반응공예조건대기미화성능적영향。실험결과표명，감처리가이재보지 Hβ분자사정체결구적동시，증가개공체적화비표면적，증가중강산화B산산량，인이제고료미화활성。재온도위70℃、공속위1h－1、순희물질적량비위1．1、반응압력위0．9MPa조건하，최화열화경기유적숙탄희경전화솔가체67．49％，비상업 Hβ분자사제고11．7％。
The hierarchical porous Hβzeolite was prepared by the alkaline treatment of Hβzeolite with NaOH solution ,and the zeolite of before and after processing were characterized by XRD ,SEM , N2 adsorption‐desorption ,NH3‐TPD and Py‐IR .The etherification reaction for FCC light gasoline on hierarchical porous Hβzeolite was carried out in a fixed bed reactor .The effect of reaction tempera‐ture ,space velocity ,mole ratio of methanol and tert‐olefin and pressure on the etherification reaction were studied .The results showed that alkali treatment could maintain Hβ zeolite crystal structure , and meanw hile increase the specific surface area and mesopore volume ,and the amount of dium‐strong acid and acid B ,thus increase the etherification activity .In optimum conditions (temperature of 70℃ ,the space velocity of 1 h -1 ,MeOH/tert‐olefins molar ratio of 1 .1 ,the reaction pressure of 0 .9 MPa) ,the tert‐olefins conversion of 67 .49% was received ,which was higher than commercial Hβze‐olite by 11 .7% .
