10 The Study of Structural analysis for Coal Ash Using High field Solid State NMR

Abstract

Chemical structure analysis of Ash for coals using solid state NMR is very difficult because of quadrupolar interation. Recent MQMAS method using high magnetic fields is able to find new chemical sites of Al except of kaolin type, as quadrupolar interation is removed. MQMAS is very powerful and useful in order to clarify the chemical structure of ash for coals.