Preparation method of micro-nano-scale desulfurization adsorbent

Abstract

The invention belongs to the field of biogas purification in the pulping and papermaking industry, and particularly relates to a preparation method of a micro-nano-scale desulfurization adsorbent. Thepreparation method of the micro-nano-scale desulfurization adsorbent is mainly used for desulfurization of biogas produced by pulping and papermaking comprehensive wastewater. The preparation methodof the micro-nano-scale desulfurization adsorbent disclosed by the invention comprises the steps of mixing nano-scale iron oxide particles with an inorganic pore-forming agent, an organic pore-formingagent and a base material; adding water into the mixture and uniformly stirring; performing extrusion-molding the mixture; then calcinating the mixture at a high temperature and cooling the mixture to obtain the micro-nano-scale desulfurization adsorbent. According to the preparation method, the micro-nano structure of the desulfurization adsorbent is constructed by preparing the nano-scale ironoxide particles and using the micro-nano channel technology, thereby greatly increasing the specific surface area of the desulfurizing agent, greatly improving the adsorption of the nano-scale iron oxide particles for hydrogen sulfide, further increasing the maximum amount of sulfur which can be removed by the desulfurizing agent in unit mass and breaking through the technical bottleneck of low efficiency of biogas desulfurization.

Description

technical field

[0001] The invention belongs to the field of biogas purification in the pulp and paper industry, and in particular relates to a preparation method of a micro-nano-scale desulfurization adsorbent, which is mainly used for desulfurization of biogas produced by pulp and paper comprehensive wastewater. Background technique

[0002] With the continuous expansion of domestic applications of clean energy represented by methane and solar energy, the advantages of new energy have been further highlighted. However, at present, the anaerobic biogas produced in the pulp and paper industry mainly uses direct combustion to generate steam for industrial heating or internal combustion engine power generation. After the biogas is purified, it can be used as an alternative to natural gas such as industrial gas or automobile fuel, which has a small loss and high energy utilization rate, and can realize efficient utilization of biogas.

[0003] At present, the existing biogas d...