%0 Journal Article
%T Experimental Study on Characteristics of Gas-Solid Mass Transfer and Reaction in a Downer<br>下行床气固传质及反应特性的实验研究
%A ZHANG Yong
%A FAN Chui-gang
%A LU Xue-song
%A LI Song-geng
%A SONG Wen-li
%A YAO Jian-zhong
%A LIN Wei-gang
%A <br>张永
%A 范垂钢
%A 吕雪松
%A 李松庚
%A 宋文立
%A 姚建中
%A 林伟刚
%J 过程工程学报
%D 2007
%I 
%X Mass transfer and reaction characteristics in a gassolid cocurrent down flow circulating fluidized bed (downer) are experimentally studied by catalytic decomposition of ozone. The profiles of solids and ozone concentrations are measured in a downer reactor with a diameter of 0.09 m and a height of 8.2 m while ozone decomposition catalyst is circulated in the bed. The experimental results show that about 45% of ozone is decomposed in the acceleration zone of the downer reactor which is more than 90% of total ozone decomposed in the downer. Ozone conversion rate in the downer increases from 50% to 55% when the solids circulating rate increases from 2.77 to 6.58 kg/(m2s). A plug flow mass transfer model is established and correlation between effective mass transfer coefficient and operation parameter is obtained.
%K downer
%K ozone decomposition reaction
%K mass transfer
%K model<br>下行床
%K 臭氧分解反应
%K 传质
%K 模型
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=3FCF8B1A330466D5&jid=B9EE12934D19905403D996AE65CEEEED&aid=A6B63752106DB771B0B79828DA1A4FAF&yid=A732AF04DDA03BB3&vid=DF92D298D3FF1E6E&iid=CA4FD0336C81A37A&sid=2A8D03AD8076A2E3&eid=EA389574707BDED3&journal_id=1009-606X&journal_name=过程工程学报&referenced_num=0&reference_num=14