Slow pyrolysis of rice straw: Analysis of products properties, carbon and energy yields

Jinje Park; Yongwoon Lee; Changkook Ryu; Young Kwon Park

doi:10.1016/j.biortech.2013.12.084

Slow pyrolysis of rice straw: Analysis of products properties, carbon and energy yields

Jinje Park, Yongwoon Lee, Changkook Ryu, Young Kwon Park

School of Environmental Engineering

Sungkyunkwan University

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

250 Scopus citations

Abstract

Among many uses of rice straw, application of its biochar from pyrolysis to the soil is receiving greater interest for increased crop productivity and sequestration of CO₂. This study investigated slow pyrolysis of rice straw at 300-700°C to characterize the yields and detailed composition of the biochar, bio-oil and non-condensable gases. Biochar was analyzed for pH, microscopic surface area and pore volume distribution. Although the mass yield for the organic fraction was only about 25% above 500°C, biochar was the primary product of pyrolysis containing 40% of energy and 45% of carbon from the straw. The utilization of by-products (bio-oil and gases) as energy resources was essential, since the sum of energy yield was about 60%. The gases could be burned to produce the heat for an auto-thermal pyrolysis process, but the heat balance was significantly influenced by the moisture content of the raw material.

Original language	English
Pages (from-to)	63-70
Number of pages	8
Journal	Bioresource Technology
Volume	155
DOIs	https://doi.org/10.1016/j.biortech.2013.12.084
State	Published - Mar 2014

Keywords

Biochar
Carbon yield
Energy yield
Rice straw
Slow pyrolysis

UN SDGs

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

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10.1016/j.biortech.2013.12.084

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title = "Slow pyrolysis of rice straw: Analysis of products properties, carbon and energy yields",

abstract = "Among many uses of rice straw, application of its biochar from pyrolysis to the soil is receiving greater interest for increased crop productivity and sequestration of CO2. This study investigated slow pyrolysis of rice straw at 300-700°C to characterize the yields and detailed composition of the biochar, bio-oil and non-condensable gases. Biochar was analyzed for pH, microscopic surface area and pore volume distribution. Although the mass yield for the organic fraction was only about 25% above 500°C, biochar was the primary product of pyrolysis containing 40% of energy and 45% of carbon from the straw. The utilization of by-products (bio-oil and gases) as energy resources was essential, since the sum of energy yield was about 60%. The gases could be burned to produce the heat for an auto-thermal pyrolysis process, but the heat balance was significantly influenced by the moisture content of the raw material.",

keywords = "Biochar, Carbon yield, Energy yield, Rice straw, Slow pyrolysis",

author = "Jinje Park and Yongwoon Lee and Changkook Ryu and Park, {Young Kwon}",

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T1 - Slow pyrolysis of rice straw

T2 - Analysis of products properties, carbon and energy yields

AU - Park, Jinje

AU - Lee, Yongwoon

AU - Ryu, Changkook

AU - Park, Young Kwon

PY - 2014/3

Y1 - 2014/3

N2 - Among many uses of rice straw, application of its biochar from pyrolysis to the soil is receiving greater interest for increased crop productivity and sequestration of CO2. This study investigated slow pyrolysis of rice straw at 300-700°C to characterize the yields and detailed composition of the biochar, bio-oil and non-condensable gases. Biochar was analyzed for pH, microscopic surface area and pore volume distribution. Although the mass yield for the organic fraction was only about 25% above 500°C, biochar was the primary product of pyrolysis containing 40% of energy and 45% of carbon from the straw. The utilization of by-products (bio-oil and gases) as energy resources was essential, since the sum of energy yield was about 60%. The gases could be burned to produce the heat for an auto-thermal pyrolysis process, but the heat balance was significantly influenced by the moisture content of the raw material.

AB - Among many uses of rice straw, application of its biochar from pyrolysis to the soil is receiving greater interest for increased crop productivity and sequestration of CO2. This study investigated slow pyrolysis of rice straw at 300-700°C to characterize the yields and detailed composition of the biochar, bio-oil and non-condensable gases. Biochar was analyzed for pH, microscopic surface area and pore volume distribution. Although the mass yield for the organic fraction was only about 25% above 500°C, biochar was the primary product of pyrolysis containing 40% of energy and 45% of carbon from the straw. The utilization of by-products (bio-oil and gases) as energy resources was essential, since the sum of energy yield was about 60%. The gases could be burned to produce the heat for an auto-thermal pyrolysis process, but the heat balance was significantly influenced by the moisture content of the raw material.

KW - Biochar

KW - Carbon yield

KW - Energy yield

KW - Rice straw

KW - Slow pyrolysis

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DO - 10.1016/j.biortech.2013.12.084

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SN - 0960-8524

VL - 155

SP - 63

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JO - Bioresource Technology

JF - Bioresource Technology

ER -

Slow pyrolysis of rice straw: Analysis of products properties, carbon and energy yields

Abstract

Keywords

UN SDGs

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