Preparation process of efficient coal-fired flue gas demercuration adsorbent and product thereof

• Main Authors: XIANG QUANYI, ZHOU JIE, FANG TINGWEI, JIN XIAOYONG, WANG HUI
• Format: Patent
• Language: Chinese; English
• Published: 01.04.2022
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention discloses a preparation process of an efficient coal-fired flue gas demercuration adsorbent and a product thereof. A porous material is used as a carrier, nitrate is used as a modifier, and H2S-low-temperature plasma is used as a means. The preparation method comprises the following steps: preparing an adsorbent precursor by an impregnation method, and bombarding with H2S-low-temperature plasma to prepare the required modified sulfurized composite oxide catalyst. Under the action of the low-temperature plasma, gaseous H2S generates high-energy electrons and free radicals, so that transition metal ions can directly generate metal sulfide, and elemental mercury in the flue gas can be efficiently adsorbed and removed. 本发明公开一种高效的燃煤烟气脱汞吸附剂的制备工艺及其产品。采用多孔材料作为载体，以硝酸盐为改性剂，以H2S-低温等离子体为手段。首先通过浸渍法制得吸附剂前驱体，又以H2S-低温等离子体轰击，从而制得所需改性硫化复合氧化物催化剂。由于低温等离子体的作用，气态的H2S产生高能电子与自由基，能够使得过渡金属离子直接生成金属硫化物，能够使得烟气中的单质汞被高效吸附脱除。