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:
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.
Characteristics and Economic Analysis of Hydrogen Production Process through Pyrolysis and Adsorption Enhanced Reforming of Waste Tires
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.
关键词
Keywords
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