微孔椰壳焦孔结构表征(英文)
发布时间:2021-06-25 15:13
为了更深入地了解微孔生物质焦的孔隙结构特征,在水蒸气气氛下制备椰壳焦(CSCs),并且采用了不同分子探针、计算模型和校准步骤对其进行表征。结果表明,椰壳焦有较高的碳含量和比较丰富的孔隙度,适合进一步活化以制备活性炭。表征椰壳焦较为合适的方法是:以Ar为分子探针,并采用非定域密度泛函(NLDFT)模型。当校准步骤优先进行时,以N2和Ar为分子探针的吸附测试结果如孔径分布(PSD)和吸附等温线会受到孔隙阻塞的影响,从而错误地描述椰壳焦的孔隙结构。实验结果还表明,273 K下仪器的真空处理可以去除绝大部分残留的He,降低孔隙阻塞的影响。
【文章来源】:燃料化学学报. 2019,47(03)北大核心EICSCD
【文章页数】:9 页
【文章目录】:
1 Experimental
1.1 Materials
1.2 Testing experiments
1.2.1 Measurement using N2and Ar
1.2.2 Measurement using CO2
1.3 Calculating SA and PSD
1.3.1 Sele ction of re lative pressure points of BET equation
1.3.2 Selection of relative pressure points of NLDFT equation
1.4 FT-IR measurement
2 Results and discussion
2.1 Comparison of different models
2.2 Comparison of different probes
2.3 Effect of calibration with He
3 Conclusions
【参考文献】:
期刊论文
[1]含有微孔的多孔固体材料的比表面测定[J]. 杨正红,高原. 现代科学仪器. 2010(01)
本文编号:3249437
【文章来源】:燃料化学学报. 2019,47(03)北大核心EICSCD
【文章页数】:9 页
【文章目录】:
1 Experimental
1.1 Materials
1.2 Testing experiments
1.2.1 Measurement using N2and Ar
1.2.2 Measurement using CO2
1.3 Calculating SA and PSD
1.3.1 Sele ction of re lative pressure points of BET equation
1.3.2 Selection of relative pressure points of NLDFT equation
1.4 FT-IR measurement
2 Results and discussion
2.1 Comparison of different models
2.2 Comparison of different probes
2.3 Effect of calibration with He
3 Conclusions
【参考文献】:
期刊论文
[1]含有微孔的多孔固体材料的比表面测定[J]. 杨正红,高原. 现代科学仪器. 2010(01)
本文编号:3249437
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