Thermodynamics simulation of biogas fueled chemical looping reforming for H2 generation using NiO/Ca2Al2SiO7

Daofeng MEI; Haibo ZHAO; Shuiping YAN

doi:10.11949/j.issn.0438-1157.20181282

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Thermodynamics simulation of biogas fueled chemical looping reforming for H₂ generation using NiO/Ca₂Al₂SiO₇

更新时间：2020-06-24

- Thermodynamics simulation of biogas fueled chemical looping reforming for H₂ generation using NiO/Ca₂Al₂SiO₇
- CIESC Journal Issue S1, Pages: 193-201(2019)
- 作者机构：
  
  1.农业农村部长江中下游农业装备重点实验室，湖北武汉 430070
  2.华中农业大学工学院，湖北武汉 430070
  3.华中科技大学煤燃烧国家重点实验室，湖北武汉 430074
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20181282
  CLC： TK 16
- Received：31 October 2018，
  
  Revised：2018-12-03，
- 稿件说明：
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梅道锋, 赵海波, 晏水平. 基于NiO/Ca₂Al₂SiO₇的沼气自热化学链重整制氢热分析动力学模拟[J]. 化工学报, 2019, 70(S1): 193-201 DOI: 10.11949/j.issn.0438-1157.20181282.

MEI Daofeng, ZHAO Haibo, YAN Shuiping. Thermodynamics simulation of biogas fueled chemical looping reforming for H₂ generation using NiO/Ca₂Al₂SiO₇[J]. CIESC Journal, 2019, 70(S1): 193-201 DOI: 10.11949/j.issn.0438-1157.20181282.
梅道锋, 赵海波, 晏水平. 基于NiO/Ca₂Al₂SiO₇的沼气自热化学链重整制氢热分析动力学模拟[J]. 化工学报, 2019, 70(S1): 193-201 DOI: 10.11949/j.issn.0438-1157.20181282. DOI：

MEI Daofeng, ZHAO Haibo, YAN Shuiping. Thermodynamics simulation of biogas fueled chemical looping reforming for H₂ generation using NiO/Ca₂Al₂SiO₇[J]. CIESC Journal, 2019, 70(S1): 193-201 DOI: 10.11949/j.issn.0438-1157.20181282. DOI：

摘要

以水泥的主要成分Ca

SiO

为惰性载体，采用热分析动力学研究了NiO/Ca

SiO

氧载体作用下沼气的化学链重整(chemical looping reforming

CLR)制氢性能。通过自编的MATLAB

代码计算得到430种工况下CLR模拟结果，充分考虑NiO负载率

NiO

、氧载体循环流率

、氧载体转化率变化Δ

、水蒸气浓度

http://notExist.jpg

5.41866684

3.89466667

及空气反应器温度

的影响。调节氧载体循环流率，可实现对(xNiO+Ca

SiO

)/biogas质量比的控制，进而调整系统总焓变化Δ

，实现自热化学链重整(CLRa)，即Δ

=0。在CLRa状态下，

和Δ

的升高均导致H

产率降低，而

增加则有助于提高H

产率。模拟结果表明，当NiO含量低于10%(质量)、

接近1150 K、Δ

小于0.25、

大于2 kg∙s

-1

、

http://notExist.jpg

5.41866684

3.89466667

小于54.5%（体积）时，H

产率可达最优值1.57(m

)∙(m

biogas)

-1

。对系统的热量平衡分析显示，CLRa能够在自热状态下运行，且反应器出口处气流携带热量能够满足进口处气流的预热需求。

Abstract

Thermodynamics analyses were carried out in biogas fueled chemical looping reforming (CLR) process for H

generation

where the main component of cement Ca

SiO

was used as a support for NiO/Ca

SiO

oxygen carrier. Around 430 cases for CLR were studied

via

a home-built MATLAB

code

considering the effects of NiO loading

NiO

oxygen carrier circulation rate

oxygen carrier conversion variation Δ

steam concentration

http://notExist.jpg

5.84200001

4.23333359

and air reactor temperature

. The global enthalpy variation Δ

can be easily tuned to Δ

. CLRa state

by varying the (NiO+Ca

SiO

)/biogas ratio. Under CLRa state

increase of

and Δ

can lead to the decrease of H

yield

while rising of

would result in the higher H

yield. The simulation suggests that the optimized H

yield of 1.57 (m

)∙(m

biogas)

-1

can be achieved with NiO loading lower than 10%(mass)

close to 1150 K

lower than 0.25

higher than 2 kg∙s

-1

and

http://notExist.jpg

5.84200001

4.23333359

lower than 54.5%(vol). Heat balance of the global FR

AR and WGS reactors showed that the CLRa can be run under auto-thermal condition

meanwhile heat at exits of reactors can be recovered to be used in the preheating of gases entering reactors.

关键词

Keywords

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