Study on reaction performance in methane dry reforming over Ni-based catalysts regulated by support morphologies

LI Zhenwei; LI Yufeng; CHEN Jie; XU Yuebing; LIU Bing; LIU Xiaohao

doi:10.12434/j.issn.2097-2547.20240078

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Study on reaction performance in methane dry reforming over Ni-based catalysts regulated by support morphologies

- Study on reaction performance in methane dry reforming over Ni-based catalysts regulated by support morphologies
- Vol. 49, Issue 8, Pages: 57-65(2024)
- 作者机构：
  
  江南大学化学与材料工程学院，江苏无锡 214122
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20240078
  CLC： TQ426
- Published：25 August 2024，
  
  Received：02 March 2024，
  
  Revised：20 March 2024，
- 稿件说明：
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李真薇,李玉峰,陈杰等.载体形貌调控Ni基催化剂甲烷干重整反应性能的研究[J].低碳化学与化工,2024,49(08):57-65.

LI Zhenwei,LI Yufeng,CHEN Jie,et al.Study on reaction performance in methane dry reforming over Ni-based catalysts regulated by support morphologies[J].Low-carbon Chemistry and Chemical Engineering,2024,49(08):57-65.
李真薇,李玉峰,陈杰等.载体形貌调控Ni基催化剂甲烷干重整反应性能的研究[J].低碳化学与化工,2024,49(08):57-65. DOI： 10.12434/j.issn.2097-2547.20240078.

LI Zhenwei,LI Yufeng,CHEN Jie,et al.Study on reaction performance in methane dry reforming over Ni-based catalysts regulated by support morphologies[J].Low-carbon Chemistry and Chemical Engineering,2024,49(08):57-65. DOI： 10.12434/j.issn.2097-2547.20240078.

摘要

甲烷干重整（DRM）反应对于温室气体CO

和CH

的共转化利用具有重要的研究意义。然而，该反应在实际应用中面临着催化剂容易积碳而失活的问题。通过制备花状、颗粒状以及片状MgO负载的Ni基催化剂，考察了载体形貌对催化剂DRM反应性能的影响，并结合XRD、SEM、H

-TPR、CO

-TPD和TG等表征手段对其影响机制进行了阐述。结果表明，在温度为800 ℃、空速为54000 mL/(g·h)下，经过50 h反应后，花状MgO负载的Ni基催化剂的CO

和CH

的平均转化率分别达到了90.2%和82.3%，

(CO)的平均值为0.93，与颗粒状和片状MgO负载的催化剂相比，具有较高的活性、稳定性和抗积碳性能。这是由于花状MgO负载的Ni基催化剂具有较高的比表面积，有利于活性金属的分散。同时，花状MgO表面存在更多的碱性位点，有利于CO

的吸附活化，增强催化剂抗积碳性能，提高DRM反应活性与稳定性。

Abstract

The methane dry reforming (DRM) reaction is of great significance for the co-conversion and utilization of gre

enhouse gases CO

and CH

. However

this reaction faces the crucial problem of catalyst deactivation caused by carbon deposition. The influence of support morphologies on the reaction performance in DRM over Ni-based catalysts was investigated by preparing flower-shaped

granular and sheet-like MgO supported catalysts. The influence mechanisms were clarified by various characterizations such as XRD

SEM

-TPR

-TPD and TG. The results show that under the temperature of 800 °C and space velocity of 54000 mL/(g·h)

the average CO

and CH

conversion rates of Ni-based catalysts supported on flower-shaped MgO reach 90.2% and 82.3%

respectively

with the average

(CO) of 0.93 after 50 h reaction. Compared with Ni-based catalysts supported on granular and sheet-like MgO

the Ni-based catalyst supported on flower-shaped MgO exhibits higher activity

stability and anti-carbon deposition ability. This is because the flower-shaped MgO has a higher specific surface area favorable for the dispersion of active metals

and there are more alkaline sites on the surface of flower-shaped MgO

which contribute to the adsorption and activation of CO

enhance the anti-carbon deposition ability of catalysts and improve the activity and stability of DRM reaction.

关键词

甲烷干重整载体形貌Ni基催化剂积碳催化性能

Keywords

methane dry reformingsupport morphologyNi-based catalystcarbon depositioncatalytic performance

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