QTD series detoxifier is a chemical product used in conjunction with catalysts or alone. The detoxifier uses magnesium aluminum spinel as a carrier and is made by a special preparation method. It has the characteristics of high strength and stability, large porosity and specific surface area, and strong anti-erosion ability. It can effectively adsorb and filter impurities such as tar, dust and stone, protect catalysts and subsequent equipment, and extend the service life of catalysts.