A catalyst preparation method and utilization method derived from waste

Abstract

The present invention relates to a catalyst preparation and utilization method derived from waste, the catalyst preparation is a one-step activation method: will be selected from KOH or K 2 CO 3 , Fe 3+ One or more components of manganese nitrate and nickel nitrate are mixed into sludge or biomass in proportion, fully stirred, and then the stirred sludge or biomass is subjected to anaerobic pyrolysis reaction at 650-900°C, The active coke is obtained in one step, and then washed with water, dehydrated and dried in air to obtain the catalyst. The denitrification efficiency of more than 80% can be obtained by using the catalyst powder or molded product at 100-360°C. The catalyst can promote tar cracking, no tar is discharged during the preparation process, and energy is self-supplied; there is no pollution after failure.

Description

technical field [0001] The invention belongs to the technical field of harmless and resourceful treatment of waste, and specifically relates to a method for preparing and utilizing a catalyst derived from waste, which can utilize sludge, pig manure, cow dung, medicine, etc. without secondary pollution. Catalysts are produced from slag, agricultural and forestry wastes, and no additional CO emissions are caused when the catalyst is used; gas can also be recovered after the catalyst is deactivated. Background technique [0002] Carbon-based catalysts are widely used and can be used in the treatment of wastewater containing heavy metals and refractory organic pollutants. For example, the patent application "a biochar catalyst, iron-carbon catalyst and its application" (CN201610168376.2 application date 2016.03.22) was published The preparation and application of a biochar catalyst and iron-carbon catalyst are described. The biochar catalyst uses biochar as a carrier and support...

AI Technical Summary

Problems solved by technology

However, this process of first carbonization and then activation is very complicated, and the activation effect will also change with the changes of different variables in the process; for the process of physical activation, waste materials (such as sludge, pig manure, cow manure, biomass ) after carbonization, using water vapor, carbon dioxide and other high-temperature media to contact with it will consume a lot of energy [Kojima N, Mitomo A, Itaya Y, et al. Adsorption removal of pollutants by active cokes produced from sludge in the energy recycle process of wastes[J]. Waste Management. 2002(22): 399-404. Jindarom C, Meeyoo V, Kitiyanan B, et al. Surface characterization and dye adsorbive capacities of char obtained from pyrolysis / gasification of sewage sludge[J]. Chemical Engineering Journal. 2007, 13 1): 239-246]; and for the process of chemical activation, carbonizing the fruit shell and sludge first and then impregnating with activator will also generate more water pollution [Jo Y B, Cha J S, Ko J H, Shin M S, Park S H, Jeon J K, Kim S S, Park Y K. NH3 catalytic reduction(SCR) of nitrogen oxides (NOx) over activated sewage sludge char. Korean JChemEng 2011; 28: 106-113.Hwang H,Choi W,Kim T. The preparation of an adsorbent from mixtures of sewage sludge and coal-tar pitch using an alkaline hydroxide activation agent[J]. Pyrolysis. 2008(83): 220-226]