Mercury removal from coal-fired flue gas of high-sulfur petroleum coke activated by pyrolysis and mechanochemical method

The Effects of Physical-Chemical Evolution of High-Sulfur Petroleum Coke on Hg0 Removal from Coal-Fired Flue Gas and Exploration of Its Micro-Scale Mechanism

“…The huge difference in the hole-enlarging effect of zinc-based additives may be the final pyrolysis temperature, which was due to the decomposition and vigorous movement of zinc-based additives at higher temperature (>500 °C). Meanwhile, the collapse of the pore structure was also 900 °C which was the same as Ma et al [ 34 ]. It is noted that the ZnCl 2 activator has the potential to produce mesoporous AC [ 43 ], while some other activators such as KOH, NaOH, and Na 2 CO 3 are beneficial to the production of microporous AC [ 44 ].…”

“…For the combined pyrolysis and mechanochemistry activation method, Ma et al [ 34 ] crushed the samples with particle sizes lower than 100 mesh and carried on the only pyrolysis ( Figure 1 a), mechanochemical activation ( Figure 1 b), and the combined pyrolysis and mechanochemical activation experiments. The final temperature and holding time of pyrolysis parameters were concerned.…”

“…For the combined mechanochemistry and chemical activation method, Ma et al [ 45 ] selected S/FeS in the mechanochemical modification that parameters were based on their previous study [ 34 ]. It was found that FeS600-60-25, which contained more FeS than other samples, had the largest specific surface area and the smallest mean pore diameter of 27.33 m 2 /g and 3.72 nm, respectively.…”

“…Among them, thiophene and sulfoxide are the two primary forms with proportions of about 60% and 26.5%, respectively. However, Ma et al [ 34 ] gave out the different detection results that the main form of S was sulfide (64.44%) and the content of thiophene was just 32.91%.…”

“…In comparison, HSPC has an outlook of few additives for activation due to sulfur-containing itself. Furthermore, mechanochemical modification is also used in the preparation of adsorbents for raw petroleum coke [ 34 ] because it is a simple operation process and ecologically safe [ 35 ]. This activation method should conduct more experimental exploration and mechanism research to adapt the directional preparation of HSPC.…”