@article{10.11648/j.sr.20261405.21,
  author = {Xiaoxu Fan and Liguo Yang and Hongjian Chen},
  title = {Experimental Study on Fixed-Bed Pyrolysis of Municipal Solid Waste},
  journal = {Science Research},
  volume = {14},
  number = {5},
  pages = {343-349},
  doi = {10.11648/j.sr.20261405.21},
  url = {https://doi.org/10.11648/j.sr.20261405.21},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sr.20261405.21},
  abstract = {To investigate the gas product evolution characteristics and heating value variation of typical municipal solid wastes during fixed-bed pyrolysis, this study selected waste tires and municipal sewage sludge as research objects. Pyrolysis experiments were conducted in an externally heated fixed-bed reactor under nitrogen atmosphere. The composition, distribution characteristics of gas products, and their heating value variations with pyrolysis temperature were systematically examined for both materials, followed by a comparative analysis of their pyrolysis product properties. The results showed that the pyrolysis gas from waste tires was mainly composed of CH4, H2, and CnHm, accounting for more than 70% of the total gas, with CH4 reaching up to 47%, H2 up to 22%, and CnHm up to 15%. Each gas component began to evolve noticeably at approximately 400°C, and the CnHm content reached its peak around 530°C before declining due to intensified secondary cracking reactions. The heating value of tire pyrolysis gas increased significantly with the rising final temperature, reaching approximately 6800 kcal/m3 at 650°C, which is comparable to that of natural gas. For municipal sewage sludge, the pyrolysis gas was mainly composed of CO2, CH4, and H2. At final temperatures ≤500°C, CO2 accounted for the highest proportion, while CH4 became dominant above 500°C. The onset temperature for significant gas evolution was about 480°C, approximately 80°C higher than that of waste tires. The heating value of sludge pyrolysis gas approached 3000 kcal/m3 at 600°C, which was only about 40%–50% of that from waste tires. The differences in pyrolysis gas characteristics between the two materials originated from their intrinsic compositional distinctions: waste tires are rich in carbon and hydrogen with low ash and oxygen contents, favoring the generation of high-quality fuel gas, while sludge possesses high ash and oxygen contents, resulting in higher CO2 proportion and lower heating value in its pyrolysis gas. This study provides fundamental experimental data for the graded pyrolysis treatment and differentiated energy utilization of municipal solid wastes.},
 year = {2026}
}

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TY  - JOUR
T1  - Experimental Study on Fixed-Bed Pyrolysis of Municipal Solid Waste
AU  - Xiaoxu Fan
AU  - Liguo Yang
AU  - Hongjian Chen
Y1  - 2026/09/04
PY  - 2026
N1  - https://doi.org/10.11648/j.sr.20261405.21
DO  - 10.11648/j.sr.20261405.21
T2  - Science Research
JF  - Science Research
JO  - Science Research
SP  - 343
EP  - 349
PB  - Science Publishing Group
SN  - 2329-0927
UR  - https://doi.org/10.11648/j.sr.20261405.21
AB  - To investigate the gas product evolution characteristics and heating value variation of typical municipal solid wastes during fixed-bed pyrolysis, this study selected waste tires and municipal sewage sludge as research objects. Pyrolysis experiments were conducted in an externally heated fixed-bed reactor under nitrogen atmosphere. The composition, distribution characteristics of gas products, and their heating value variations with pyrolysis temperature were systematically examined for both materials, followed by a comparative analysis of their pyrolysis product properties. The results showed that the pyrolysis gas from waste tires was mainly composed of CH4, H2, and CnHm, accounting for more than 70% of the total gas, with CH4 reaching up to 47%, H2 up to 22%, and CnHm up to 15%. Each gas component began to evolve noticeably at approximately 400°C, and the CnHm content reached its peak around 530°C before declining due to intensified secondary cracking reactions. The heating value of tire pyrolysis gas increased significantly with the rising final temperature, reaching approximately 6800 kcal/m3 at 650°C, which is comparable to that of natural gas. For municipal sewage sludge, the pyrolysis gas was mainly composed of CO2, CH4, and H2. At final temperatures ≤500°C, CO2 accounted for the highest proportion, while CH4 became dominant above 500°C. The onset temperature for significant gas evolution was about 480°C, approximately 80°C higher than that of waste tires. The heating value of sludge pyrolysis gas approached 3000 kcal/m3 at 600°C, which was only about 40%–50% of that from waste tires. The differences in pyrolysis gas characteristics between the two materials originated from their intrinsic compositional distinctions: waste tires are rich in carbon and hydrogen with low ash and oxygen contents, favoring the generation of high-quality fuel gas, while sludge possesses high ash and oxygen contents, resulting in higher CO2 proportion and lower heating value in its pyrolysis gas. This study provides fundamental experimental data for the graded pyrolysis treatment and differentiated energy utilization of municipal solid wastes.
VL  - 14
IS  - 5
ER  - 

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