以纸浆黑液为催化剂高变质无烟煤热天平水蒸气催化气化动力学  

Catalytic Gasification Kinetics of High Metamorphosed Anthracites with Steam by Thermogravity Using Black Liquor of Paper Pulp Plant as Catalyst

作　　者：林荣英[1] 张济宇[1] 林驹[1] 林诚[1] 

机构地区：[1]福州大学化学工程技术研究所,福州350002

出　　处：《燃烧科学与技术》2007年第6期491-497,共7页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(20376014);福建省科技厅重点资助项目(HG99-01)

摘　　要：以纸浆黑液为催化剂，用等温热重法研究4种高变质无烟煤常压纯水蒸气催化气化反应动力学．采用催化剂有效因子修正缩芯模型，测定温度为750～950℃反应控制时无烟煤碳转化率与时间的关系，并用修正缩芯模型和修正体积模型进行较好拟合，得出这4种无烟煤水蒸气催化气化的反应速率常数、活化能和指前因子，活化能范围为112．838～204．566kJ／mol．除灰含量最高的永安加筛煤以外，其他3种煤的反应速率常数都比加碳酸钠的高．Using black liquor（BL） of paper pulp plant as catalyst, the steam gasification kinetics of four high metamorphosed an- thracites were investigated by isothermal thermo-gravimetric analysis under ambient pressure. The relationships of coal conversion （x） versus reaction time （t） were obtained from 750 ℃ to 950 ℃ under reaction control. The shrinking core model was modified by catalyst effective factor. The modification shrinking core model and the modification volumetric model were used to well correlate the relationship between x and t. Therefore, the reaction rate constants, the reaction activation energy（Ea） and the pre-exponential factor were obtained.The Ea, ranging from 112.838 kJ/mol--204.566 kJ/mol was estimated by this study. Compared with the k8 of Na2CO3, those of BL were higher except for Yongan Jiashai coal which has the highest ash concentration.

关 键 词：等温热重法 纸浆黑液 水蒸气催化气化 高变质无烟煤 反应动力学 

分 类 号：TQ541[化学工程—煤化学工程]