, ▁the ▁high ▁temper atures ▁involved ▁( > 6 0 0   ° C ) ▁mean ▁that ▁a ▁relatively ▁efficient ▁Rank ine ▁cycle ▁for ▁generating ▁electric ity ▁can ▁be ▁operated . ▁ ▁Note ▁that ▁the ▁waste ▁heat ▁from ▁the ▁market - leading ▁am ine ▁scr ub bing ▁CO 2 ▁capture ▁process ▁is ▁em itted ▁at ▁a ▁maximum ▁of ▁ 1 5 0   ° C . ▁The ▁low ▁temperature ▁of ▁this ▁heat ▁means ▁that ▁it ▁contains ▁much ▁less ▁exer gy ▁and ▁can ▁generate ▁much ▁less ▁electric ity ▁through ▁a ▁Rank ine ▁or ▁organ ic ▁Rank ine ▁cycle . ▁ ▁This ▁electric ity ▁generation ▁is ▁one ▁of ▁the ▁main ▁benefits ▁of ▁Ca L ▁over ▁lower - temper ature ▁post - comb ust ion ▁capture ▁processes ▁as ▁the ▁electric ity ▁is ▁an ▁extra ▁re venue ▁stream ▁( or ▁reduces ▁costs ). ▁ ▁S orb ent ▁de grad ation ▁ ▁It ▁has ▁been ▁shown ▁that ▁the ▁activity ▁of ▁the ▁sor b ent ▁reduces ▁quite ▁marked ly ▁in ▁labor atory , ▁ben ch - scale ▁and ▁pilot ▁plant ▁tests . ▁This ▁de grad ation ▁has ▁been ▁attributed ▁to ▁three ▁main ▁mechan isms , ▁as ▁shown ▁below . ▁ ▁At tr ition ▁ ▁Cal ci um ▁ox ide ▁is ▁fri able , ▁that ▁is , ▁quite ▁brit t le . ▁In ▁fluid ised ▁b eds , ▁the ▁calci um ▁ox ide ▁particles ▁can ▁break ▁apart ▁upon ▁collision ▁with ▁the ▁other ▁particles ▁in ▁the ▁fluid ised ▁bed ▁or ▁the ▁vessel ▁containing ▁it . ▁[ REF ] ▁The ▁problem ▁seems