Effects of sugars on the structure of SAPO-34 and its MTO performance

YAN Zi-jin; JI Yong-gang; SONG Hua; ZHANG Yong-jun; DAI Yue-li

Volume 47 Issue 6

Jun. 2019

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Article Navigation > Journal of Fuel Chemistry and Technology > 2019 > 47(6): 737-744

YAN Zi-jin, JI Yong-gang, SONG Hua, ZHANG Yong-jun, DAI Yue-li. Effects of sugars on the structure of SAPO-34 and its MTO performance[J]. Journal of Fuel Chemistry and Technology, 2019, 47(6): 737-744.

Citation:

YAN Zi-jin, JI Yong-gang, SONG Hua, ZHANG Yong-jun, DAI Yue-li. Effects of sugars on the structure of SAPO-34 and its MTO performance[J]. Journal of Fuel Chemistry and Technology, 2019, 47(6): 737-744.

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Effects of sugars on the structure of SAPO-34 and its MTO performance

1.
College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing 163318, China
2.
PetroChina Daqing Petrochemical Research Center, Daqing 163714, China
3.
Provincial Key Laboratory of Oil & Gas Chemical Technology, Northeast Petroleum University, Daqing 163318, China

Funds:

Innovative Scientific Research Projects of Innovative Practice Base for Postgraduate Training in Northeast Petroleum University YJSCX2017-016NEPU

Received Date: 2019-01-09
Rev Recd Date: 2019-03-27

Available Online: 2021-01-23

Publish Date: 2019-06-10

Abstract

Abstract

Hierarchical SAPO-34 zeolites were successfully synthesized using cheap xylose, sucrose, starch and glucomannan as hard template and characterized by means of XRD, BET, SEM, TEM, ICP and NH₃-TPD. The effects of sugar hard template on the structure and MTO properties of as-prepared SAPO-34 zeolites were studied on a fixed bed. The results showed that introduction of carbohydrate hard template could increase the specific surface area, microporous and mesoporous volume of SAPO-34 zeolites. The olefin selectivity and lifetime of SAPO-34 were both higher than those of ordinary SAPO-34. The SAPO-34-z with the largest mesoporous volume, the least acidity amounts and the weakest acidity showed the longest lifetime (130 min), which was 30% longer than that of ordinary SAPO-34 (100 min). The lifetime of zeolites decreased in the order of SAPO-34-z > SAPO-34-h > SAPO-34-d > SAPO-34-m > SAPO-34 > SAPO-34-p. The olefin selectivity of hierarchical SAPO-34 zeolites is higher than that of conventional SAPO-34 zeolites.
- methanol,
- SAPO-34,
- olefin,
- hierarchical

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References(19)

References

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