Mineral carbonation in peridotite rock for CO_2 sequestration and a method of leakage reduction of CO_2 in the rock

摘要

In the recent years, the amounts of green house gases have dramatically increased. This situation led to changing in climate conditions. One of the effective ways to reduce these amounts in atmosphere is CO_2 capturing from huge spreading sources and injection it into geological formations. Peridotite is a type of rock that reacts with CO_2 at higher rate when compared to the other rocks. Since the reaction of CO_2 with peridotite is exothermic, the reaction can be self sustaining; therefore, it can reduce overall energy consumption and costs of CO_2 emission. There are several factors that have effects on the reaction, in this paper effects such as pressure, temperature, salinity, acidity, and stirring on the rate of reaction are discussed, and using horizontal wells and bilateral drilling in order to increase rate of reaction and increase the amount of storage are recommended.%Posljednjih godina se je značajno povećala količina stakleničnih plinova. Takvo stanje je dovelo do promjene klimatskih uvjeta. Jedan od učinkovitih načina smanjivanja tih količina u atmosferi je hvatanje CO_2 iz velikih dispergiranih izvora i utiskivanje u geološke formacije. Peridotit je vrsta stijene koja reagira s CO_2 većom brzinom u usporedbi s ostalim stijenama. Budući da je reakcija CO_2 s peridotitom egzotermička, reakcija može biti samoodrživa, stoga on može smanjiti cjelokupnu potrošnju energije i vrijednosti emisije C02. Postoji nekoliko čimbenika koji utječu na reakciju a u ovom članku se razmatra djelovanje tlaka, temperature, saliniteta, kiselosti i miješanja na povećanje brzine reakcije. Raspravlja se i o korištenju horizontalnih bušotina i bilateralnog bušenja u cilju povećanja brzine reakcije i veličine prostora za pohranjivanje.