TY - GEN
T1 - Research on additives assisted catalytic cyclo-dehydration of 1, 4-butanediol to tetrahydrofuran in near-critical water
AU - Yang, Yan
AU - Dai, Liyi
AU - Wang, Jinshou
AU - Zhou, Hongyan
PY - 2012
Y1 - 2012
N2 - We herein report the cyclo-dehydration of 1,4-butanediol (BD) assisted with additives to form tetrahydrofuran (THF) in near-critical water (NCW).Three additives including Fe 2(SO 4) 3,ZnSO 4and NaHSO 4were screened. Effects of various experimental parameters such as temperature (260-340°C), time (60-180min), reactant/water ratio (r/w, 1:10-1:40) and pressure (15-25MPa) on the yield of THF were examined. Without the presence of additives, the results showed that increasing temperature favored the cyclo-dehydration of BD to form THF. The maximum yield (52.61 wt. %) was obtained at temperature of 340°C and time of 180 min. With the presence of additives, at temperature range of 260~300°C and time range of 60~130min, all the additives selected can promote the cyclo-dehydration of BD to yield THF. However, with further increasing temperature and time, the additives would suppress the formation of THF. The catalytic activity toward the production of THF in the order of Fe 2(SO 4) 3> ZnSO 4> NaHSO 4. The maximum yield of THF assisted with Fe 2(SO 4) 3could reach as high as 59.85 wt. % at 320°C, 120 min. Large reactant/water ratio would not benefit the yield of THF because of the dilution of additive. Increasing the pressure will slightly increase the yield of THF. Base on experimental results, a possible reaction mechanism and pathway of dehydration of BD was proposed in NCW.
AB - We herein report the cyclo-dehydration of 1,4-butanediol (BD) assisted with additives to form tetrahydrofuran (THF) in near-critical water (NCW).Three additives including Fe 2(SO 4) 3,ZnSO 4and NaHSO 4were screened. Effects of various experimental parameters such as temperature (260-340°C), time (60-180min), reactant/water ratio (r/w, 1:10-1:40) and pressure (15-25MPa) on the yield of THF were examined. Without the presence of additives, the results showed that increasing temperature favored the cyclo-dehydration of BD to form THF. The maximum yield (52.61 wt. %) was obtained at temperature of 340°C and time of 180 min. With the presence of additives, at temperature range of 260~300°C and time range of 60~130min, all the additives selected can promote the cyclo-dehydration of BD to yield THF. However, with further increasing temperature and time, the additives would suppress the formation of THF. The catalytic activity toward the production of THF in the order of Fe 2(SO 4) 3> ZnSO 4> NaHSO 4. The maximum yield of THF assisted with Fe 2(SO 4) 3could reach as high as 59.85 wt. % at 320°C, 120 min. Large reactant/water ratio would not benefit the yield of THF because of the dilution of additive. Increasing the pressure will slightly increase the yield of THF. Base on experimental results, a possible reaction mechanism and pathway of dehydration of BD was proposed in NCW.
KW - 1, 4-Butanediol
KW - Additives
KW - Cyclo-dehydration
KW - Near-critical water
KW - Reaction mechanism
UR - https://www.scopus.com/pages/publications/84867302714
U2 - 10.4028/www.scientific.net/AMR.550-553.693
DO - 10.4028/www.scientific.net/AMR.550-553.693
M3 - 会议稿件
AN - SCOPUS:84867302714
SN - 9783037854556
T3 - Advanced Materials Research
SP - 693
EP - 698
BT - Advances in Chemical Engineering II
T2 - 2nd International Conference on Chemical Engineering and Advanced Materials, CEAM 2012
Y2 - 13 July 2012 through 15 July 2012
ER -