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geliable_dk金蟲 (初入文壇)
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[求助]
BET表征時,比表面積為負值,什么原因,怎么解決?(數(shù)據(jù)如下)
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催化劑為自合成Y型分子篩,測試方法為微孔方法 Surface Area Single point surface area at p/p?= 0.214749591: 193.9689 m?g BET Surface Area: -437.8251 m?g Langmuir Surface Area: -189.9088 m?g BJH Adsorption cumulative surface area of pores between 1.7000 nm and 300.0000 nm width: 412.640 m?g BJH Desorption cumulative surface area of pores between 1.7000 nm and 300.0000 nm width: 436.1675 m?g Pore Volume Single point adsorption total pore volume of pores less than 80.5832 nm width at p/p?= 0.975375748: 0.567907 cm?g BJH Adsorption cumulative volume of pores between 1.7000 nm and 300.0000 nm width: 0.877049 cm?g BJH Desorption cumulative volume of pores between 1.7000 nm and 300.0000 nm width: 0.896655 cm?g Pore Size Adsorption average pore width (4V/A by ): -5.18844 nm BJH Adsorption average pore width (4V/A): 8.5018 nm BJH Desorption average pore width (4V/A): 8.2230 nm |

| 你用的2020啊,設(shè)點和選點都有些問題。Y型分子篩屬于微孔分子篩,所以低壓區(qū)要做的點很多,麥克儀器低壓區(qū)用注氣量來控制壓力點,高于0.01后用設(shè)置點來控制。模型計算選點也有些問題!BET選點要求線性4個9,C常數(shù)要為正值。 |

至尊木蟲 (文學泰斗)
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多點BET方程壓力點選取原則 http://www.bjbuilder.com/list_m. ... =18&pid=592 |
金蟲 (初入文壇)
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金蟲 (初入文壇)

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