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. shu

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

Corresponding author: SONG Hua,
Received Date: 9 January 2019
Revised Date: 27 March 2019

Fund Project: The project was supported by Innovative Scientific Research Projects of Innovative Practice Base for Postgraduate Training in Northeast Petroleum University(YJSCX2017-016NEPU)Innovative Scientific Research Projects of Innovative Practice Base for Postgraduate Training in Northeast Petroleum University YJSCX2017-016NEPU

Figures(8)

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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