摘要
以硫铁矿为实验原料研究了煤气化过程白云石／石灰石／氧化铁的固硫特性，并重点研究了铁一钙复合固硫剂的固硫效果。发现钙基固硫剂有催化和固硫两种作用，低温下催化硫铁矿分解，高温下则以固硫为主。氧化铁是一种良好的辅助团硫剂，铁一钙复合团硫剂能明显提高固硫率。CO2抑制固硫且改变灰渣的物相组成，并用XRD对结果进行了验证。
This paper studies the sulfur capture behaviour of limestone,dolomite, iron oxide and in particular Ca-Fe complex during coal gasification. Using pyrite as the sample of experiment,the results show that Ca-based desulphurizers serve a dual function of catalysis and desulphurization,they catalyse the decomposition of pyrite at low temperature and take in-situ sulfur capture as the dominant factor at high temperature. Iron oxide is a good assistant desulphurizer,Ca-Fe complex desulphurizers can increasing sulfur capture efficiencies obviously. The in-situ sulfur capture efficiencies obviously. The in-situ sulfur capture is suppressed by CO2 and the crystalline state of products changes, greatly with the presence of CO2. In addition,the results had been proved by XRD.
出处
《煤炭转化》
CAS
CSCD
1997年第3期56-62,共7页
Coal Conversion
基金
煤炭青年基金
关键词
煤炭气化
固硫剂
固硫
气化炉
型煤
气化
coal gasification, Ca-based desulphurizer, iron oxide, complex desulphurizer
