A study of Co-gasification of sewage sludge and palm kernel shells

Guan Bang Chen; Fang Hsien Wu; Tzu Lu Fang; Hsien Tsung Lin; Yei Chin Chao

doi:10.1016/j.energy.2020.119532

A study of Co-gasification of sewage sludge and palm kernel shells

Guan Bang Chen, Fang Hsien Wu, Tzu Lu Fang, Hsien Tsung Lin, Yei Chin Chao

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

In this study, sewage sludge is converted to syngas by co-gasification with palm kernel shells due to their complementary effects. The basic characteristics of fuels are analyzed, and a thermogravimetric analysis integrated with Fourier transform infrared spectroscopy is used to explore the co-pyrolysis/gasification reaction of sewage sludge and palm kernel shells. The results are then used for an FWO activation energy estimation, synergistic effect analysis, and gas yield analysis. The results show that a synergistic effect exists and that sewage sludge in the blended fuel exceeding 30% will increase the C[dbnd]O band, C[dbnd]C bond, C–O, and C–C bond yields. Different synergistic steps are identified, and the average activation energy for the blended fuels is shown to be lower than that in pure feedstocks. A 1 kW_th continuous-type fluidized-bed gasifier is designed, and the optimal operating conditions necessary to obtain the maximum H₂/CO ratio and maximum normalized H₂ concentration are found through the Taguchi method. The CO₂/(CO₂+H₂O) ratio was the most dominant parameter in the selected conditions, and 70%CO₂/30%H₂O had the best performance. In addition, catalyst addition had the second most dominant effect, where a maximum H₂/CO ratio of 0.563 and a maximum normalized H₂ concentration of 32.2% were obtained.

Original language	English
Article number	119532
Journal	Energy
Volume	218
DOIs	https://doi.org/10.1016/j.energy.2020.119532
Publication status	Published - 2021 Mar 1

All Science Journal Classification (ASJC) codes

Civil and Structural Engineering
Building and Construction
Modelling and Simulation
Renewable Energy, Sustainability and the Environment
Fuel Technology
Energy Engineering and Power Technology
Pollution
Energy(all)
Mechanical Engineering
Industrial and Manufacturing Engineering
Management, Monitoring, Policy and Law
Electrical and Electronic Engineering

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10.1016/j.energy.2020.119532

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title = "A study of Co-gasification of sewage sludge and palm kernel shells",

abstract = "In this study, sewage sludge is converted to syngas by co-gasification with palm kernel shells due to their complementary effects. The basic characteristics of fuels are analyzed, and a thermogravimetric analysis integrated with Fourier transform infrared spectroscopy is used to explore the co-pyrolysis/gasification reaction of sewage sludge and palm kernel shells. The results are then used for an FWO activation energy estimation, synergistic effect analysis, and gas yield analysis. The results show that a synergistic effect exists and that sewage sludge in the blended fuel exceeding 30% will increase the C[dbnd]O band, C[dbnd]C bond, C–O, and C–C bond yields. Different synergistic steps are identified, and the average activation energy for the blended fuels is shown to be lower than that in pure feedstocks. A 1 kWth continuous-type fluidized-bed gasifier is designed, and the optimal operating conditions necessary to obtain the maximum H2/CO ratio and maximum normalized H2 concentration are found through the Taguchi method. The CO2/(CO2+H2O) ratio was the most dominant parameter in the selected conditions, and 70%CO2/30%H2O had the best performance. In addition, catalyst addition had the second most dominant effect, where a maximum H2/CO ratio of 0.563 and a maximum normalized H2 concentration of 32.2% were obtained.",

author = "Chen, {Guan Bang} and Wu, {Fang Hsien} and Fang, {Tzu Lu} and Lin, {Hsien Tsung} and Chao, {Yei Chin}",

note = "Funding Information: This research was partially supported by the Ministry of Science and Technology of Republic of China under the Grant number MOST 107-2221-E-006 -226. Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

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doi = "10.1016/j.energy.2020.119532",

language = "English",

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AU - Chen, Guan Bang

AU - Wu, Fang Hsien

AU - Fang, Tzu Lu

AU - Lin, Hsien Tsung

AU - Chao, Yei Chin

N1 - Funding Information: This research was partially supported by the Ministry of Science and Technology of Republic of China under the Grant number MOST 107-2221-E-006 -226. Publisher Copyright: © 2020 Elsevier Ltd

PY - 2021/3/1

Y1 - 2021/3/1

N2 - In this study, sewage sludge is converted to syngas by co-gasification with palm kernel shells due to their complementary effects. The basic characteristics of fuels are analyzed, and a thermogravimetric analysis integrated with Fourier transform infrared spectroscopy is used to explore the co-pyrolysis/gasification reaction of sewage sludge and palm kernel shells. The results are then used for an FWO activation energy estimation, synergistic effect analysis, and gas yield analysis. The results show that a synergistic effect exists and that sewage sludge in the blended fuel exceeding 30% will increase the C[dbnd]O band, C[dbnd]C bond, C–O, and C–C bond yields. Different synergistic steps are identified, and the average activation energy for the blended fuels is shown to be lower than that in pure feedstocks. A 1 kWth continuous-type fluidized-bed gasifier is designed, and the optimal operating conditions necessary to obtain the maximum H2/CO ratio and maximum normalized H2 concentration are found through the Taguchi method. The CO2/(CO2+H2O) ratio was the most dominant parameter in the selected conditions, and 70%CO2/30%H2O had the best performance. In addition, catalyst addition had the second most dominant effect, where a maximum H2/CO ratio of 0.563 and a maximum normalized H2 concentration of 32.2% were obtained.

AB - In this study, sewage sludge is converted to syngas by co-gasification with palm kernel shells due to their complementary effects. The basic characteristics of fuels are analyzed, and a thermogravimetric analysis integrated with Fourier transform infrared spectroscopy is used to explore the co-pyrolysis/gasification reaction of sewage sludge and palm kernel shells. The results are then used for an FWO activation energy estimation, synergistic effect analysis, and gas yield analysis. The results show that a synergistic effect exists and that sewage sludge in the blended fuel exceeding 30% will increase the C[dbnd]O band, C[dbnd]C bond, C–O, and C–C bond yields. Different synergistic steps are identified, and the average activation energy for the blended fuels is shown to be lower than that in pure feedstocks. A 1 kWth continuous-type fluidized-bed gasifier is designed, and the optimal operating conditions necessary to obtain the maximum H2/CO ratio and maximum normalized H2 concentration are found through the Taguchi method. The CO2/(CO2+H2O) ratio was the most dominant parameter in the selected conditions, and 70%CO2/30%H2O had the best performance. In addition, catalyst addition had the second most dominant effect, where a maximum H2/CO ratio of 0.563 and a maximum normalized H2 concentration of 32.2% were obtained.

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A study of Co-gasification of sewage sludge and palm kernel shells

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