还原时合成气H2/CO摩尔比对铁基催化剂浆态床费-托合成反应性能的影响

石油炼制与化工 ›› 2013, Vol. 44 ›› Issue (6): 53-58.

还原时合成气H2/CO摩尔比对铁基催化剂浆态床费-托合成反应性能的影响

程时富¹,常鸿雁¹,李骏峰¹,石玉林²

1. 中国神华煤制油化工有限公司上海研究院
2. 北京低碳清洁能源研究所

收稿日期:2012-10-16 修回日期:2013-01-10 出版日期:2013-06-12 发布日期:2013-05-24
通讯作者: 程时富 E-mail:dengfeng537@sina.com

EFFECT OF REDUCTION WITH DIFFERENT H2/CO MOLE RATIOS SYNGAS ON SYNTHESIS PERFORMANCE OF IRON-BASED F-T CATALYST

Received:2012-10-16 Revised:2013-01-10 Online:2013-06-12 Published:2013-05-24

摘要/Abstract

摘要： 在浆态床反应器中，详细考察尾气循环状态下还原时合成气H2/CO摩尔比对SFT418工业铁基F-T合成催化剂还原和反应后的物相以及F-T合成反应性能的影响。结果表明：还原后催化剂的比表面积大幅度下降，平均孔径明显增大，孔体积下降。还原时合成气H2/CO摩尔比影响催化剂的还原程度、F-T合成反应活性和失活速率，在较低的H2/CO摩尔比下还原得到的催化剂中铁碳化物含量较高，F-T合成初始反应活性较高，失活速率较大；在较高H2/CO摩尔比下还原得到的催化剂中铁碳化物含量较低，F-T合成初始反应活性较低，但其失活速率比在较低的H2/CO摩尔比下还原得到的催化剂低。催化剂还原时适宜的合成气H2/CO摩尔比为20。

Abstract: The synthesis performance of a spray-dried spherical iron-based F-T catalyst SFT418 reduced with difference H2/CO molar ratio syngases was investigated in a continuous stirred slurry tank reactor under reaction conditions of 250℃, 2.3 MPa, H2/CO = 1.5 and 3000 ml/(g.cat?h) and the bulk composition of the catalyst after reaction was characterized by M?ssbauer (MES). The results indicate that the BET surface area and the pore volume of the reduced catalyst decrease, while the average pore size is the opposite after reduction. The catalyst is easier to reduce with low H2/CO ratio syngas and has more FexC phase and higher conversion at the start-of-run but faster deactivation rate. Higher ratios of H2/CO ratio syngas give the reversive results. It is proven that the most appropriate H2/CO molar ratio of reduction syngas is 20:1.

程时富常鸿雁李骏峰石玉林. 还原时合成气H2/CO摩尔比对铁基催化剂浆态床费-托合成反应性能的影响[J]. 石油炼制与化工, 2013, 44(6): 53-58.

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