高含硫气藏在开发过程，随着压力的下降，必然会发生元素硫沉积，堵塞孔道，影响产能。
Element sulphur deposition, channel plugging and productivity reduction consequentially occur in the development of high sour gas fields as pressure drops.
使用助滤剂的目的：防止过滤介质孔道堵塞，或降低滤饼的过滤阻力。
Use filter aid agent purpose: to prevent the filter medium passes jams, or reduce the filter cake resistance.
同时，硼化物覆盖了表面酸中心，堵塞了孔道，因而提高了反应的选择性；
At the same time, boride thus formed covered the surface acid sites and blocked the pores and channels, leading to higher para-selectivity.
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