A Broadband ASE Light Source-based FTTX RoF-WDM Optical Network System

S. Meng; S. B. Hu; H. Chu; C. Chang; Shu-Chuan Chu

doi:10.1016/j.fuel.2017.05.089

A Broadband ASE Light Source-based FTTX RoF-WDM Optical Network System

S. Meng
, S. B. Hu
, H. Chu
, C. Chang
, Shu-Chuan Chu

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

26 Citations (Scopus)

Abstract

Oxy-H ₂O combustion is a novel oxy-fuel combustion technology, different from conventional and oxy-CO ₂ combustion. NO and N ₂O emissions during devolatilization and char combustion of a single biomass particle in O ₂/N ₂ and O ₂/H ₂O were investigated in a tube reactor under different temperatures (700 °C, 800 °C, and 900 °C) and oxygen concentrations (21%, 30%, 40%, and 50% by volume). Single biomass pellets of poplar wood, rice husk, and corn stalk were selected. The method of isothermal thermo-gravimetric analysis was applied to distinguish the two stages of biomass combustion based on its proximate analysis. The presence of H ₂O vapor can improve the free radicals, H ₂ and CO concentrations, promoting NO and N ₂O reduction. The total conversions of fuel-N to NO and N ₂O in O ₂/N ₂ are over 2 times higher than those in O ₂/H ₂O. In O ₂/N ₂, NO is formed as the sample heated up, while N ₂O is mainly formed during char combustion stage. However, NO is formed after N ₂O in O ₂/H ₂O. No matter in O ₂/N ₂ or in O ₂/H ₂O, a higher fuel-N content in biomass results in higher NO and N ₂O yields during the two stages, whilst the conversions of fuel-N to NO and N ₂O during the two stages decrease with increasing fuel-N/ash content. In O ₂/N ₂, the total conversion of fuel-N to NO reaches the maximum value (14.35%) at T = 800 °C, whilst the total conversion of fuel-N to NO increases with increasing temperature in O ₂/H ₂O. The total conversions of fuel-N to N ₂O decrease with increasing temperature in O ₂/N ₂ and O ₂/H ₂O. The influence of oxygen concentration on NO and N ₂O is similar to that of temperature. In O ₂/N ₂, there is a maximum value of the total conversion of fuel-N to NO (14.35%) at 〈O ₂〉 = 30%, whilst there is no obvious change of the total conversion of fuel-N to NO with increasing oxygen concentration in O ₂/H ₂O. The total conversions of fuel-N to N ₂O decrease with increasing oxygen concentration in O ₂/N ₂ and O ₂/H ₂O. The results are beneficial to understand the NO and N ₂O emission mechanisms and favorable for the NO and N ₂O control in O ₂/H ₂O.

Original language	English
Pages (from-to)	162-170
Number of pages	9
Journal	Journal of Network Intelligence
Volume	206
DOIs	https://doi.org/10.1016/j.fuel.2017.05.089
Publication status	Published - 2017

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 13 Climate Action

Keywords

N O
NO
O /H O
O /N
Single biomass particle

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10.1016/j.fuel.2017.05.089

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@article{63b9d11e1bb04c869d033f80f7ff9af5,

title = "A Broadband ASE Light Source-based FTTX RoF-WDM Optical Network System",

abstract = "Oxy-H 2O combustion is a novel oxy-fuel combustion technology, different from conventional and oxy-CO 2 combustion. NO and N 2O emissions during devolatilization and char combustion of a single biomass particle in O 2/N 2 and O 2/H 2O were investigated in a tube reactor under different temperatures (700 °C, 800 °C, and 900 °C) and oxygen concentrations (21\%, 30\%, 40\%, and 50\% by volume). Single biomass pellets of poplar wood, rice husk, and corn stalk were selected. The method of isothermal thermo-gravimetric analysis was applied to distinguish the two stages of biomass combustion based on its proximate analysis. The presence of H 2O vapor can improve the free radicals, H 2 and CO concentrations, promoting NO and N 2O reduction. The total conversions of fuel-N to NO and N 2O in O 2/N 2 are over 2 times higher than those in O 2/H 2O. In O 2/N 2, NO is formed as the sample heated up, while N 2O is mainly formed during char combustion stage. However, NO is formed after N 2O in O 2/H 2O. No matter in O 2/N 2 or in O 2/H 2O, a higher fuel-N content in biomass results in higher NO and N 2O yields during the two stages, whilst the conversions of fuel-N to NO and N 2O during the two stages decrease with increasing fuel-N/ash content. In O 2/N 2, the total conversion of fuel-N to NO reaches the maximum value (14.35\%) at T = 800 °C, whilst the total conversion of fuel-N to NO increases with increasing temperature in O 2/H 2O. The total conversions of fuel-N to N 2O decrease with increasing temperature in O 2/N 2 and O 2/H 2O. The influence of oxygen concentration on NO and N 2O is similar to that of temperature. In O 2/N 2, there is a maximum value of the total conversion of fuel-N to NO (14.35\%) at 〈O 2〉 = 30\%, whilst there is no obvious change of the total conversion of fuel-N to NO with increasing oxygen concentration in O 2/H 2O. The total conversions of fuel-N to N 2O decrease with increasing oxygen concentration in O 2/N 2 and O 2/H 2O. The results are beneficial to understand the NO and N 2O emission mechanisms and favorable for the NO and N 2O control in O 2/H 2O. ",

keywords = "N O, NO, O /H O, O /N, Single biomass particle",

author = "S. Meng and Hu, \{S. B.\} and H. Chu and C. Chang and Shu-Chuan Chu",

year = "2017",

doi = "10.1016/j.fuel.2017.05.089",

language = "English",

volume = "206",

pages = "162--170",

journal = "Journal of Network Intelligence",

issn = "2414-8105",

publisher = "Taiwan Ubiquitous Information",

}

TY - JOUR

T1 - A Broadband ASE Light Source-based FTTX RoF-WDM Optical Network System

AU - Meng, S.

AU - Hu, S. B.

AU - Chu, H.

AU - Chang, C.

AU - Chu, Shu-Chuan

PY - 2017

Y1 - 2017

N2 - Oxy-H 2O combustion is a novel oxy-fuel combustion technology, different from conventional and oxy-CO 2 combustion. NO and N 2O emissions during devolatilization and char combustion of a single biomass particle in O 2/N 2 and O 2/H 2O were investigated in a tube reactor under different temperatures (700 °C, 800 °C, and 900 °C) and oxygen concentrations (21%, 30%, 40%, and 50% by volume). Single biomass pellets of poplar wood, rice husk, and corn stalk were selected. The method of isothermal thermo-gravimetric analysis was applied to distinguish the two stages of biomass combustion based on its proximate analysis. The presence of H 2O vapor can improve the free radicals, H 2 and CO concentrations, promoting NO and N 2O reduction. The total conversions of fuel-N to NO and N 2O in O 2/N 2 are over 2 times higher than those in O 2/H 2O. In O 2/N 2, NO is formed as the sample heated up, while N 2O is mainly formed during char combustion stage. However, NO is formed after N 2O in O 2/H 2O. No matter in O 2/N 2 or in O 2/H 2O, a higher fuel-N content in biomass results in higher NO and N 2O yields during the two stages, whilst the conversions of fuel-N to NO and N 2O during the two stages decrease with increasing fuel-N/ash content. In O 2/N 2, the total conversion of fuel-N to NO reaches the maximum value (14.35%) at T = 800 °C, whilst the total conversion of fuel-N to NO increases with increasing temperature in O 2/H 2O. The total conversions of fuel-N to N 2O decrease with increasing temperature in O 2/N 2 and O 2/H 2O. The influence of oxygen concentration on NO and N 2O is similar to that of temperature. In O 2/N 2, there is a maximum value of the total conversion of fuel-N to NO (14.35%) at 〈O 2〉 = 30%, whilst there is no obvious change of the total conversion of fuel-N to NO with increasing oxygen concentration in O 2/H 2O. The total conversions of fuel-N to N 2O decrease with increasing oxygen concentration in O 2/N 2 and O 2/H 2O. The results are beneficial to understand the NO and N 2O emission mechanisms and favorable for the NO and N 2O control in O 2/H 2O.

AB - Oxy-H 2O combustion is a novel oxy-fuel combustion technology, different from conventional and oxy-CO 2 combustion. NO and N 2O emissions during devolatilization and char combustion of a single biomass particle in O 2/N 2 and O 2/H 2O were investigated in a tube reactor under different temperatures (700 °C, 800 °C, and 900 °C) and oxygen concentrations (21%, 30%, 40%, and 50% by volume). Single biomass pellets of poplar wood, rice husk, and corn stalk were selected. The method of isothermal thermo-gravimetric analysis was applied to distinguish the two stages of biomass combustion based on its proximate analysis. The presence of H 2O vapor can improve the free radicals, H 2 and CO concentrations, promoting NO and N 2O reduction. The total conversions of fuel-N to NO and N 2O in O 2/N 2 are over 2 times higher than those in O 2/H 2O. In O 2/N 2, NO is formed as the sample heated up, while N 2O is mainly formed during char combustion stage. However, NO is formed after N 2O in O 2/H 2O. No matter in O 2/N 2 or in O 2/H 2O, a higher fuel-N content in biomass results in higher NO and N 2O yields during the two stages, whilst the conversions of fuel-N to NO and N 2O during the two stages decrease with increasing fuel-N/ash content. In O 2/N 2, the total conversion of fuel-N to NO reaches the maximum value (14.35%) at T = 800 °C, whilst the total conversion of fuel-N to NO increases with increasing temperature in O 2/H 2O. The total conversions of fuel-N to N 2O decrease with increasing temperature in O 2/N 2 and O 2/H 2O. The influence of oxygen concentration on NO and N 2O is similar to that of temperature. In O 2/N 2, there is a maximum value of the total conversion of fuel-N to NO (14.35%) at 〈O 2〉 = 30%, whilst there is no obvious change of the total conversion of fuel-N to NO with increasing oxygen concentration in O 2/H 2O. The total conversions of fuel-N to N 2O decrease with increasing oxygen concentration in O 2/N 2 and O 2/H 2O. The results are beneficial to understand the NO and N 2O emission mechanisms and favorable for the NO and N 2O control in O 2/H 2O.

KW - N O

KW - NO

KW - O /H O

KW - O /N

KW - Single biomass particle

UR - http://bit.kuas.edu.tw/~jni/2017/vol2/JNI_2017_vol2_n1_003.pdf

UR - https://www.scopus.com/pages/publications/85020276459

U2 - 10.1016/j.fuel.2017.05.089

DO - 10.1016/j.fuel.2017.05.089

M3 - Article

SN - 2414-8105

VL - 206

SP - 162

EP - 170

JO - Journal of Network Intelligence

JF - Journal of Network Intelligence

ER -

A Broadband ASE Light Source-based FTTX RoF-WDM Optical Network System

Abstract

UN SDGs

Keywords

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