CAJ | 학술논문

为了研究酸性催化剂积碳失活以及再生特性，在固定床反应器上，以高铝砖作为催化剂，进行了生物质焦油催化裂解实验。实验结果表明，由于催化剂表面积碳，造成催化剂活性随着作用时间增加而下降。但当催化剂工作一定时间后，催化剂表面的积碳速率开始变得平缓，单层积碳向多层积碳转变。当积碳速率与反应中焦炭脱除速率达到平衡时，催化剂表面积碳量将趋于稳定。实验中采用烧焦法有效地恢复了催化剂的活性，但是焦炭燃烧会破坏催化剂表面的酸性结构，减少表面活化位，使得再生后的催化剂并不能完全达到新鲜催化剂所具有的催化能力。而且烧焦再生过程中会发生烧结，结晶等现象，改变催化剂的孔隙率、孔径分布、比表面积等物理特性。
위료연구산성최화제적탄실활이급재생특성，재고정상반응기상，이고려전작위최화제，진행료생물질초유최화렬해실험。실험결과표명，유우최화제표면적탄，조성최화제활성수착작용시간증가이하강。단당최화제공작일정시간후，최화제표면적적탄속솔개시변득평완，단층적탄향다층적탄전변。당적탄속솔여반응중초탄탈제속솔체도평형시，최화제표면적탄량장추우은정。실험중채용소초법유효지회복료최화제적활성，단시초탄연소회파배최화제표면적산성결구，감소표면활화위，사득재생후적최화제병불능완전체도신선최화제소구유적최화능력。이차소초재생과정중회발생소결，결정등현상，개변최화제적공극솔、공경분포、비표면적등물리특성。
In order to study the activity regeneration of deactivating acid catalysts with carbon deposition, the catalytic cracking experiments on biomass tar were carried out in a fixed bed reactor with high-alumina brick as acid catalyst. The results show that the catalyst activity declines with the increase of reaction time, due to the carbon depositing on catalyst surface. The carbon depositing rate on catalyst surface becomes smooth after a period of work time, and the mode of coke deposition becomes multi-layer form monolayer. The quantities of the carbon depositing on the catalyst surface will be stable, when the coking rate is equal to the rate of coke consumption. The regeneration method of coke burning can effectively recover the activity of catalyst. But the activity of regenerated catalyst cannot be the same as that of fresh catalyst, because the acidic structure and active center on catalyst surface are destroyed in coke combustion process. In addition, the sintering or crystallization phenomenon will occur in catalysts regeneration process with coke burning, which may change the physical characteristics of catalyst, such as porosity, pore size distribution, specific surface area, and so on.