NOx control technologies for coal combustion: Anna-Karin Hjalmarsson IEA Coal Research, Gemini House, London SW15 6AA, UK, 1990, ISBN 929029 177X, pp. 102, £60/£180 (member/non-member countries)

Power generation from lignite: Gordon R.

Power generation from lignite: Gordon R. Couch IEA Coal Research, Gemini House, 10-18 Putney Hill, London SW15 6AA, UK, 1989, ISBN 92 9029 170 2, pp. 67, £60 (member countries), £180 (non-member countries)

📂 Article 📅 1990 🏛 Elsevier Science 🌐 English ⚖ 123 KB

## Dear Sir We welcome the derivation by Gulder and Glavincevski of a more comprehensive equation for estimating the number of carbon-carbon bonds in mixtures of hydrocarbons (Equation ( 2)). The authors are quite incorrect, however, in asserting that their equation is exact for mixtures of hydroc