福建无烟煤CO2气化过程纸浆黑液和钙混合物的催化活性

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福建无烟煤CO₂气化过程纸浆黑液和钙混合物的催化活性

Gul-e-Rana JAFFRI; 张济宇

Institute of Chemical Engineering and Technology, Fuzhou University, Fuzhou 350002, China

收稿日期:2007-01-02 修回日期:1900-01-01 出版日期:2007-10-28 发布日期:2007-10-28
通讯作者: Gul-e-Rana JAFFRI

Catalytic activity of the black liquor and calcium mixture in CO₂ gasification of Fujian anthracite

Gul-e-Rana JAFFRI; ZHANG Jiyu

Institute of Chemical Engineering and Technology, Fuzhou University, Fuzhou 350002, China

Received:2007-01-02 Revised:1900-01-01 Online:2007-10-28 Published:2007-10-28
Contact: Gul-e-Rana JAFFRI

摘要/Abstract

摘要： CO2 gasification of Fuijian high-metamorphous anthracite with black liquor (BL) and/or mixture of BL and calcium stuff (BL+Ca) as catalyst was studied by using a thermogravimetry under 750—950℃ at ambient pressure. When the coal was impregnated with an appropriate quantity of Ca and BL mixture, the catalytic activity of CO2 gasification was enhanced obviously. With a loading of 8%Na-BL+2%Ca, the carbon conversion of three coal samples tested reaches up to 92.9%—99.3% at 950℃ within 30min. The continuous formation of alkali surface compounds such as ([-COM], [-CO2M]) and the presence of exchanged Ca, such as calcium phenolate and calcium carboxylates (COO)2Ca, contribute to the increase in catalytic efficiency, and using BL+Ca is more efficient than that adding BL only. The homogeneous model and shrinking-core model were applied to correlate the data of conversion with time and to estimate the reaction rate constants under different temperature. The corresponding re-action activation energy (Ea) and pre-exponential factor of three anthracites were estimated. It is found that Ea is in the range from 73.6 to 121.4kJ•mol－1 in the case of BL+Ca, and 74.3 to 104.2kJ•mol－1 when only BL was used as the catalyst, both of which are much less than that from 143.5 to 181.4kJ•mol－1 if no catalyst used. It is clearly demonstrated that both of BL+Ca mixture and BL could be the source of cheap and effective catalyst for coal gasi-fication.

关键词: thermogravimetry;black liquor;calcium;catalytic gasification;high-metamorphous anthracite;reaction kinetics

Abstract: CO2 gasification of Fuijian high-metamorphous anthracite with black liquor (BL) and/or mixture of BL and calcium stuff (BL+Ca) as catalyst was studied by using a thermogravimetry under 750—950℃ at ambient pressure. When the coal was impregnated with an appropriate quantity of Ca and BL mixture, the catalytic activity of CO2 gasification was enhanced obviously. With a loading of 8%Na-BL+2%Ca, the carbon conversion of three coal samples tested reaches up to 92.9%—99.3% at 950℃ within 30min. The continuous formation of alkali surface compounds such as ([-COM], [-CO2M]) and the presence of exchanged Ca, such as calcium phenolate and calcium carboxylates (COO)2Ca, contribute to the increase in catalytic efficiency, and using BL+Ca is more efficient than that adding BL only. The homogeneous model and shrinking-core model were applied to correlate the data of conversion with time and to estimate the reaction rate constants under different temperature. The corresponding re-action activation energy (Ea) and pre-exponential factor of three anthracites were estimated. It is found that Ea is in the range from 73.6 to 121.4kJ•mol－1 in the case of BL+Ca, and 74.3 to 104.2kJ•mol－1 when only BL was used as the catalyst, both of which are much less than that from 143.5 to 181.4kJ•mol－1 if no catalyst used. It is clearly demonstrated that both of BL+Ca mixture and BL could be the source of cheap and effective catalyst for coal gasi-fication.

Key words: thermogravimetry, black liquor, calcium, catalytic gasification, high-metamorphous anthracite, reaction kinetics

Gul-e-Rana JAFFRI, 张济宇. 福建无烟煤CO₂气化过程纸浆黑液和钙混合物的催化活性[J]. CIESC Journal.

Gul-e-Rana JAFFRI, ZHANG Jiyu. Catalytic activity of the black liquor and calcium mixture in CO₂ gasification of Fujian anthracite[J]. .

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福建无烟煤CO₂气化过程纸浆黑液和钙混合物的催化活性

Catalytic activity of the black liquor and calcium mixture in CO₂ gasification of Fujian anthracite

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