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期刊

標題

Sustainable biochar to mitigate global climate change

作者

Dominic Woolf, James E. Amonette, F. Alayne Street-Perrott, Johannes Lehmann & Stephen Joseph

名稱(期刊/節目)

Nature Communications

期刊期數/節目集數

1:56

出版單位

Macmillan Education

出版年月日

2010/8/10

原文摘要

Production of biochar (the carbon (C)-rich solid formed by pyrolysis of biomass) and its storage in soils have been suggested as a means of abating climate change by sequestering carbon, while simultaneously providing energy and increasing crop yields. Substantial uncertainties exist, however, regarding the impact, capacity and sustainability of biochar at the global level. In this paper we estimate the maximum sustainable technical potential of biochar to mitigate climate change. Annual net emissions of carbon dioxide (CO2), methane and nitrous oxide could be reduced by a maximum of 1.8 Pg CO2-C equivalent (CO2-Ce) per year (12% of current anthropogenic CO2-Ce emissions; 1 Pg=1 Gt), and total net emissions over the course of a century by 130 Pg CO2-Ce, without endangering food security, habitat or soil conservation. Biochar has a larger climate-change mitigation potential than combustion of the same sustainably procured biomass for bioenergy, except when fertile soils are amended while coal is the fuel being offset.

原文摘要簡述

生物炭的生產(由生物質熱烈解形成富含碳(C)的固體)及在土壤中存儲,已被提出藉由固存碳作為減緩氣候變遷的一種手段,同時提供能量及增加作物產量。但是,在全球範圍內,關於生物炭的影響,負載量和永續性存在很大的不確定性。在本文中,我們估計了生物炭緩解氣候變化的最大永續技術潛力。每年最多可將二氧化碳(CO2),甲烷和一氧化二氮的淨排放量減少1.8 Pg CO2-C當量(CO2-Ce)(佔當前人為CO2-Ce排放量的12%; 1 Pg = 1 Gt ),以及一個世紀內的總淨排放量為130 Pg CO2-Ce,而不會危及糧食安全、棲息地或水土保持。比起使用同樣可持續獲取的生物質進行生物能源的燃燒,生物炭具有更大的緩解氣候變遷的潛力,除非當肥沃的土壤被改良而煤炭作為燃料被替代時。

關鍵字

biochar, climate change

連結

https://doi.org/10.1038/ncomms1053

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