Hydrogen production by chemical looping steam reforming of ethanol using NiO/montmorillonite oxygen carriers in a fixed-bed reactor

被引：60

作者：

Jiang, Bo ^{[1
]}

Dou, Binlin ^{[1
]}

Wang, Kaiqiang ^{[1
]}

Zhang, Chuan ^{[1
]}

Song, Yongchen ^{[1
]}

Chen, Haisheng ^{[2
]}

Xu, Yujie ^{[2
]}

机构：

[1] Dalian Univ Technol, Minist Educ, Key Lab Ocean Energy Utilizat & Energy Conservat, Sch Energy & Power Engn, Dalian 116023, Peoples R China

[2] Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2016年 / 298卷

关键词：

Chemical looping steam reforming; NiO/montmorillonite; Oxygen carriers; Fixed-bed reactor; NICKEL-CATALYSTS; NI NANOPARTICLES; CARBON-MONOXIDE; MONTMORILLONITE; GLYCEROL; METHANE; SILICA; IMPREGNATION; WATER; OIL;

D O I：

10.1016/j.cej.2016.04.027

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Hydrogen production by chemical looping steam reforming of ethanol using oxygen carriers was carried out in a fixed-bed reactor. NiO/montmorillonite prepared by ultrasound assisted cation exchange impregnation method was used as oxygen carriers. The synthesized NiO/montmorillonite was characterized by N-2 adsorption-desorption, inductively coupled plasma optical emission spectrometry (ICP-OES), X-ray diffraction (XRD), transmission electron microscopy (TEM), H-2 temperature-programmed reduction (H-2-TPR), H-2 pulse chemisorption, temperature-programmed reduction (TPO) and thermal gravimetric analysis (TGA). The characterization results showed the particle size, metal-support interaction, nickel dispersion interrelated with cation exchange capability and confinement effect of montmorillonite's lamellar structure. Activity and stability tests were conducted at 550 degrees C with a steam to carbon ratio of 4. The results showed that 20Ni-MMT possessed the best performance due to its strong sintering and coking resistance, and also presented the shortest 'dead time' due to its larger active surface area. Moreover, 20Ni-MMT exhibited the excellent coke elimination ability in the air feed step. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：96 / 106

页数：11

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