Journal of the Chemical Society - Faraday Transactions p. 631 - 636 (1992)
Update date:2022-08-29
Topics:
Ball, Matthew C.
Snelling, Christine M.
Strachan, Alec N.
Strachan, Rebecca M.
The thermal decomposition of solid sodium sesquicarbonate has been studied at temperatures between 350 and 487 K in nitrogen and carbon dioxide atmospheres.In nitrogen, a single-stage decomposition to sodium carbonate occurs, following Avrami-Erofeyev kinetics (n = 2), with an inflexion at ca. 390 K.The activation energies are 24 kJ mol-1 for the high-temperature region and 58 kJ mol-1 for the low-temperature region.In carbon dioxide above 435 K, the single-stage reaction follows contracting disc kinetics with an activation energy of 29 kJ mol-1.In carbon dioxide at low temperatures, wegscheiderite (Na2CO3*3NaHCO3) and sodium carbonate monohydrate (Na2CO3*H2O) are formed, and this reaction follows first-order kinetics, withb an activation energy of 67 kJ mol-1.Microscopic evidence is also presented.Relationships between the decomposition of sesquicarbonate and other related compounds are discussed.
Shanghai SMEC Trading Co., Ltd.
website:http://www.shanghaismec.com
Contact:+86-21-68811293
Address:ROOM 1101,NO.800 SHANGCHENG RD,SHANGHAI,CHINA
Nanjing distinctions Medical Technology Co., Ltd.(expird)
Contact:+86-15996203785 13914714059
Address:nanjing,jiangsu , China
Zhejiang Chemicals Import & Export Corporation (ZHECHEM)
Contact:+86-571-87046953
Address:No. 37, Qingchun Road
Tianjin Pharmacn Medical Technology Co.,Ltd.
Contact:86-22-60122566ext.866(English),23359620
Address:Green Industrial Base, 6 Haitaifazhan Sixth Rd., Huayuan Industrial Area, Tianjin, 300384, China
Guangxi Bonger Pharmaceutical Co., Ltd
website:http://napo.lookchem.com/
Contact:+86-18817331185
Address:Donghai Industrial Zone, Tiandong Country,Guangxi,China
Doi:10.1021/ja01227a030
(1945)Doi:10.1002/cmdc.201500428
(2015)Doi:10.1016/S0040-4039(00)94369-7
(1990)Doi:10.1021/ja01473a053
(1961)Doi:10.1248/cpb.22.214
(1974)Doi:10.1021/acs.bioconjchem.7b00235
(2017)
