Catalytic Activity of the Black Liquor and Calcium Mixture in CO2 Gasification of Fujian Anthracite  

作　　者：Gul-e-Rana JAFFRI 张济宇 

机构地区：[1]Institute of Chemical Engineering and Technology, Fuzhou University, Fuzhou 350002, China

出　　处：《Chinese Journal of Chemical Engineering》2007年第5期670-679,共10页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China （No.20376014） and Fujian Science and Technology Council Grant （HG99-01）.

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 reaction 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 gasification.Fuijian high-metamorphous 的 CO2 气化被在周围的压力在 750 950 ° C 下面使用 thermogravimetry 白煤作为催化剂与黑白酒(BL ) 或 BL 和钙东西(BL+Ca ) 的混合学习。当煤与 Ca 和 BL 混合的适当数量被使妊娠时， CO2 气化的催化活动显然被提高。与一装载 8% Na-BL+2%Ca，测试的三件煤样品的碳变换到达多达 92.9%99.3% 在在 30min 以内的 950 ° C。碱表面混合物例如的连续形成([-COM],[-CO2M]) 和交换 Ca 的存在，例如钙，酚吃了并且钙羧化物(咕咕叫) 2Ca，在催化效率，和使用的 BL+Ca 贡献增加仅仅比那增加的 BL 更有效。同类的模型和精神病医生核心模型被使用相关有时间并且到估计的变换的数据在不同温度下面的反应率常数。相应反应激活精力(Ea ) 和三 anthracites 的 pre 指数的因素被估计。 Ea 在从 73.6 的范围到 121.4kJ · 摩尔，这被发现? 1 在 BL+Ca 的情况中，并且 74.3 到 104.2kJ · 摩尔? 1 当仅仅 BL 被用作催化剂时，哪个多不到那从 143.5 到 181.4kJ · 摩尔? 1 如果没有催化剂使用了。两 BL+Ca 混合和 BL 能是为煤气化的便宜、有效的催化剂的来源，这清楚地被表明。

关 键 词：THERMOGRAVIMETRY black liquor CALCIUM catalytic gasification high-metamorphous anthracite reaction kinetics 

分 类 号：O643.3[理学—物理化学]