Advance in Ni-based catalysts for the carbondioxide reforming of methane

doi:10.16085/j.issn.1000-6613.2015.08.019

Abstract

Abstract: This paper studied a two-step method of oxidizing calcination process in order to improve the utilization efficiency of copperas and achieve the energy-saving and environmental production. The analysis of copperas' drying and dehydration curves and TG-DSC (thermogravimetric analysis and differential scanning calarmeutry) curves showed that the best drying temperature was 110℃, and most of the product was FeSO₄·7H₂O. Then the dried products were calcinated at the different temperature. The influences of the calcination temperature on the product recovery, residual sulfur content, the compound morphology of Fe and the distribution of sulfur in the flue gas was investigated. The results showed that when the temperature was 800—900℃, air flow rate was 120L/h, and the constant temperature time was 90min, the amount of residual sulfur in the calcinated product was 0.33% and total Fe was more than 60%. Therefore, the final product could be added into the sinter as iron materials.

Key words: methane, reforming, catalyst, coking, sintering, stability

摘要： 由于甲烷二氧化碳重整将两种温室气体甲烷和二氧化碳转化为可利用的合成气,因此近二十年以来引起了越来越多研究者的关注。其中,Ni基催化剂由于其较高的活性和较低的成本得到了广泛的研究。本文将甲烷二氧化碳重整Ni基催化剂分为负载型和非负载型两大类分别综述了它们的研究进展。针对反应条件下的Ni基催化剂因积炭和烧结引起的失活问题,本文介绍了引起这两个问题的原因,并概括了抑制失活并提升Ni基催化剂活性和稳定性的5条途经,包括选择性钝化活性金属、增强Ni颗粒分散性、控制催化剂的酸碱性、减小Ni颗粒的尺寸以及提高Ni颗粒稳定性。最后指出,设计和制备颗粒小而且稳定的催化剂是同时解决催化剂积炭和烧结两大问题的关键。

关键词: 甲烷, 重整, 催化剂, 积炭, 烧结, 稳定性

CLC Number:

O643.36
TE64

WANG Mingzhi, ZHANG Qiulin, ZHANG Tengfei, WANG Yiru. Advance in Ni-based catalysts for the carbondioxide reforming of methane[J]. Chemical Industry and Engineering Progree, 2015, 34(08): 3027-3033,3039.

王明智, 张秋林, 张腾飞, 王一茹. Ni基甲烷二氧化碳重整催化剂研究进展[J]. 化工进展, 2015, 34(08): 3027-3033,3039.

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