标题：Investigation on highly dispersed iron catalyst for direct coal liquefaction
作者：Jianming, Zhou ;Naiji, Wang ;Zhijian, Gong ;Caihong, Wang ;Yonggang, Wang
作者机构：[Jianming, Zhou ;Naiji, Wang ] Beijing Research Institute of Coal Chemistry, China Coal Research Institute, Beijing 100013, China;[Zhijian, Gong ] Sha 更多
会议名称：25th Annual International Pittsburgh Coal Conference, PCC
会议日期：September 29, 2008 - October 2, 2008
来源：25th Annual International Pittsburgh Coal Conference, PCC - Proceedings
摘要：The highly dispersed α-FeOOH and γ-FeOOH were prepared by sedimentation method, of which granularities, surface area, pore specific volume, average radius and character of thermal decomposition were analyzed by SEM, BET and TGA. The effects of catalysts, highly dispersed α-FeOOH and γ-FeOOH, on the liquefaction of Shangwan coal were examined using a micro autoclave at same Fe moles, comparison with conventional Fe2CO3. It was found that the granularities of α-FeOOH and γ-FeOOH were between 20˜80 nm, the α-FeOOH of spindle and the γ-FeOOH of thread asymmetrical clew and batting, which gradually dehydrating covert into α-Fe2O3and γ-Fe2O3at 250˜3 00°C. As a result, at 420°C, the total conversion and oil yield order is: α-FeOOH > γ-FeOOH > Fe2CO3. The total conversion of α-FeOOH is 2.84 % and 11.33 %, higher than that of γ-FeOOH,and the Fe2O3, meanwhile the oil yield is 3.10 % and 10.01 %, higher than that of γ-FeOOH, and the Fe2CO3at same adding Fe 3.00% (dried coal). With increasing the liquefaction temperature, the order of the liquefaction ability range of adding is: α-FeOOH < γ-FeOOH < Fe2CO3. It was shown that the α-FeOOH and γ-FeOOH decreased the temperature for liquefaction reaction, because asphaltene and preasphaltene converted into small molecule gases and liquefaction products were promoted by α-FeOOH and γ-FeOOH.