气候变化领域集成服务门户(CCPortal): Predictable and targeted activation of biomass to carbons with high surface area density and enhanced methane storage capacity

CCPortal

DOI	10.1039/d0ee01340d
	Predictable and targeted activation of biomass to carbons with high surface area density and enhanced methane storage capacity
	Altwala A.; Mokaya R.
发表日期	2020
ISSN	1754-5692
起始页码	2967
结束页码	2978
卷号	13 期号:9
英文摘要	A challenge in the synthesis of activated carbons is that currently there is no way to prepare materials with predictable and targeted properties. In particular, there are no material parameters or characteristics of the starting carbonaceous matter that can be used to predict the porosity and packing density of the activated carbon. Here we report on the synthesis of biomass-derived activated carbons with targeted porosity and packing density that is suitable for methane storage. We show that the ratio of elemental oxygen to elemental carbon (i.e., O/C atomic ratio) of the precursor can be used as a universal predictor of the nature of porosity generated in an activated carbon. We use date seeds (Phoenix dactylifera) as an example of how biomass starting material with a very low O/C ratio, along with choice of mode of carbonisation, can be used to synthesise activated carbons with optimised porosity, as defined by the surface area density, and high packing density that is suitable for methane storage. The carbons store up to 222 cm3 (STP) cm-3 methane at 25 °C and 35 bar, which is much higher than any value reported to date for porous carbons, and is comparable to the best metal-organic-framework (MOF). However, the activated carbons are much cheaper (≤1$ per kg) compared to at best 10-20$ per kg for MOFs. Our findings present important insights on directed synthesis of optimised activated carbons and represent a significant step in the development of cheap porous carbons for high volumetric methane (or natural gas) storage. The findings are also applicable to informing the optimised preparation of activated carbons with targeted properties for other applications in energy storage and environmental remediation. This journal is © The Royal Society of Chemistry.
语种	英语
scopus关键词	Activated carbon; Biomass; Carbonization; Density (specific gravity); Energy storage; Metal-Organic Frameworks; Methane; Organometallics; Porosity; Porous materials; Carbonaceous matter; Directed synthesis; Elemental carbon; Elemental oxygen; Environmental remediation; High packing density; High surface area; Material parameter; Storage (materials); activation energy; biomass; carbon sequestration; carbon storage; methane; prediction; surface area; Phoenix dactylifera
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162360
作者单位	School of Chemistry, University of Nottingham, University Park, Nottingham, NG7 2RD, United Kingdom
推荐引用方式 GB/T 7714	Altwala A.,Mokaya R.. Predictable and targeted activation of biomass to carbons with high surface area density and enhanced methane storage capacity[J],2020,13(9).
APA	Altwala A.,&Mokaya R..(2020).Predictable and targeted activation of biomass to carbons with high surface area density and enhanced methane storage capacity.Energy and Environmental Science,13(9).
MLA	Altwala A.,et al."Predictable and targeted activation of biomass to carbons with high surface area density and enhanced methane storage capacity".Energy and Environmental Science 13.9(2020).