TY - JOUR

T1 - CO2-free Calcium Carbide Manufacturing: Demanded Strategy in the Carbon-neutral Chemical Industry

AU - Самойленко, Дмитрий Евгеньевич

AU - Родыгин, Константин Сергеевич

AU - Анаников, Валентин Павлович

PY - 2023/10/2

Y1 - 2023/10/2

N2 - Calcium carbide is considered a possible key component in the sustainable carbon cycle, including convenient recycling of carbon wastes to industrial uptake. However, currently employed CaC 2 manufacturing process produces significant amounts of CO 2 . One of the main factors of its appearance is the formation of carbon oxide during the reaction. The reaction of lime ore with coal inevitably results in the formation of CO and the loss of one carbon atom. CO is usually burnt, forming CO 2 to maintain the required high temperature during synthesis – 2200 °C. In the present study, we discuss that the use of calcium metal instead of lime represents a good opportunity to prevent CO 2 emission since the reaction of Ca with carbon occurs in an atom‐efficient manner and results in only CaC 2 at a much lower temperature of 1100 °C. Here, the reaction of Ca with carbon was successfully tested to synthesize CaC 2 . The desired product was isolated in gram‐scale amounts in 97.2% yield and 99% purity. The environmental friendliness of the proposed method originates from the calculations of the E‐factor and much lower reaction temperature. Rationalization is provided concerning the cost factor of Ca within the considered process. This article is protected by copyright. All rights reserved.

AB - Calcium carbide is considered a possible key component in the sustainable carbon cycle, including convenient recycling of carbon wastes to industrial uptake. However, currently employed CaC 2 manufacturing process produces significant amounts of CO 2 . One of the main factors of its appearance is the formation of carbon oxide during the reaction. The reaction of lime ore with coal inevitably results in the formation of CO and the loss of one carbon atom. CO is usually burnt, forming CO 2 to maintain the required high temperature during synthesis – 2200 °C. In the present study, we discuss that the use of calcium metal instead of lime represents a good opportunity to prevent CO 2 emission since the reaction of Ca with carbon occurs in an atom‐efficient manner and results in only CaC 2 at a much lower temperature of 1100 °C. Here, the reaction of Ca with carbon was successfully tested to synthesize CaC 2 . The desired product was isolated in gram‐scale amounts in 97.2% yield and 99% purity. The environmental friendliness of the proposed method originates from the calculations of the E‐factor and much lower reaction temperature. Rationalization is provided concerning the cost factor of Ca within the considered process. This article is protected by copyright. All rights reserved.

UR - https://www.mendeley.com/catalogue/d7d4bfff-32d7-3a31-a8b0-9e7ab9157bfe/

U2 - 10.1002/cjoc.202300358

DO - 10.1002/cjoc.202300358

M3 - Article

VL - 41

SP - 3611

EP - 3617

JO - Chinese Journal of Chemistry

JF - Chinese Journal of Chemistry

SN - 1001-604X

IS - 24

ER -