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引言 浸渍活性炭是一种低温、高效脱硫剂,其硫容量可达52%以上,特别适合于低H_2S浓度的天然气脱硫净化过程。活性炭孔结构是影响脱硫效率的关键因素,许多人曾对此作过研究,但结果却很不一致,如Swinarski和Siedlewski的研究表明脱硫活性与孔径在3.5nm—8nm的孔表面积成正比,而认为小于3.5nm的孔没有脱硫效果,并且反应生成的硫最初总是覆盖在8nm—30nm的大孔中,这种硫不影响催化活性。Sreeramamurthy和Menon分析了活性炭孔内生成的硫,其结果表明反应最初阶段生成的硫沉积在相当于20个硫原子的大孔内,这部分约占总的硫生成量的70%,而后才填充到直至4个硫原子的微孔中,Steijins和Mars研究了不同孔结构物质的脱硫效果,发现孔径在0.5nm—1nm范围内的微孔具有最高的催化活性,太大和太小的孔的脱硫效果则要弱得多。
Introduction Impregnated activated carbon is a low-temperature and high-efficiency desulfurizer with a sulfur capacity of over 52%. It is especially suitable for natural gas desulfurization and purification with low H 2 S concentration. Activated carbon pore structure is the key factor affecting the desulfurization efficiency, many people have conducted this study, but the results are very inconsistent, as Swinarski and Siedlewski study shows that the desulfurization activity and pore size in 3.5nm-8nm pore surface area is proportional to that Pores smaller than 3.5 nm have no desulfurization effect, and the sulfur generated by the reaction is always initially covered in macropores of 8 nm to 30 nm, and this sulfur does not affect the catalytic activity. Sreeramamurthy and Menon analyzed the sulfur generated in the pores of the activated carbon. The results show that the sulfur generated in the initial stage of the reaction is deposited in the macropores corresponding to 20 sulfur atoms, which accounts for about 70% of the total sulfur production, before being filled Up to four sulfur atoms in the pores, Steijins and Mars studied the pore structure of different substances desulfurization effect and found that pores in the range of 0.5nm-1nm has the highest catalytic activity of micropores, too large and too small pore desulfurization The effect is much weaker.