1. 西安交通大学动力工程多相流国家重点实验室,西安,710049
2. 西安交通大学能源与动力工程学院,西安,710049
: 2024-02-25。作者简介: 沈孟飞(1999—),男,硕士生
刘银河(通信作者),男,教授,博士生导师。基金项目: 陕西省重点研发计划资助项目(2021GXLH-Z-088)。
网络首发:2024-10-10,
纸质出版:2024
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沈孟飞, 宋虎潮, 邢定一, 等. 废旧轮胎热解吸附强化重整制氢特性及经济性分析[J]. 西安交通大学学报, 2024,58(10):222-232.
SHEN Mengfei, SONG Huchao, XING Dingyi, et al. Characteristics and Economic Analysis of Hydrogen Production Process through Pyrolysis and Adsorption Enhanced Reforming of Waste Tires[J]. 2024, 58(10): 222-232.
沈孟飞, 宋虎潮, 邢定一, 等. 废旧轮胎热解吸附强化重整制氢特性及经济性分析[J]. 西安交通大学学报, 2024,58(10):222-232. DOI: 10.7652/xjtuxb202410020.
SHEN Mengfei, SONG Huchao, XING Dingyi, et al. Characteristics and Economic Analysis of Hydrogen Production Process through Pyrolysis and Adsorption Enhanced Reforming of Waste Tires[J]. 2024, 58(10): 222-232. DOI: 10.7652/xjtuxb202410020.
为实现废旧轮胎资源化利用
提出一种废旧轮胎热解耦合吸附强化重整制氢工艺。基于吉布斯自由能最小化原理以及能量和质量守恒定律
以CaO为吸附剂构建了废旧轮胎热解耦合吸附强化重整制氢工艺流程
将传统重整与CO
2
原位吸附相结合。分析考察了重整反应温度、反应压力、水与碳物质的量比(n
S
/n(C))、钙与碳物质的量比(n(Ca)/n(C))作参数对工艺热力学性能的影响
并从技术经济性角度分析了该工艺的可行性。研究结果表明:温度和n
S
/n(C)的增加都可以提高氢气产率
但是制氢效率会随着重整温度和n
S
/n(C)的不断增加而降低; n(Ca)/n(C)增加可以提高氢气产率及制氢效率
但是当n(Ca)/n(C)>1时提升不大。综合考虑
最佳操作参数如下:重整温度为650 ℃、重整压力为1 MPa、n
S
/n(C)为3.5、n(Ca)/n(C)为1
此时氢气产率为0.203
制氢效率为57.9%。经济性分析表明
废旧轮胎制氢成本约为10.87元/kg
投资回收期为4 a
具有较高的经济效益。研究结果可为废旧轮胎高值化利用提供参考。
To promote the efficient utilization of waste tires
a hydrogen production process involving pyrolysis
adsorption
and enhanced reforming of waste tires is proposed. Based on the principles of minimizing Gibbs free energy and maintaining energy and mass conservation
the proposed process flow employs CaO as the adsorbent to combine traditional reforming with in-situ CO
2
adsorption. The thermodynamic performance of the p
rocess is analyzed by examining the effects of reforming reaction temperature
reaction pressure
steam-to-carbon ratio(n
S
/n(C))
and calcium-to-carbon ratio(n(Ca)/n(C)). Additionally
a techno-economic evaluation is conducted to assess the feasibility of the process. The research findings indicate that increasing the reforming temperature and n
S
/n(C)enhances hydrogen yield. However
the hydrogen production efficiency decreases as the reforming temperature and n
S
/n(C)increase. On the other hand
increasing the n(Ca)/n(C)ratio improves both hydrogen yield and production efficiency
although the improvement becomes less significant when n(Ca)/n(C)exceeds 1. Considering all factors
the optimal operating parameters are determined as follows: a reforming temperature of 650 ℃
a reforming pressure of 1 MPa
an n
S
/n(C)ratio of 3.5
and an n(Ca)/n(C)ratio of 1. Under these conditions
the hydrogen yield is 0.203
and the hydrogen production efficiency reaches 57.9%. Economic analysis reveals that the cost of hydrogen production from waste tires is approximately 10.87 yuan/kg
with a payback period of 4 a. These results indicate significant economic benefits associated with the process. The research outcomes provide valuable insights for the high-value utilization of waste tires.
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