Deuterium tracing study of unsaturated aliphatics hydrogenation by supercritical water in upgrading heavy oil. Part I: Non-catalytic cracking

- Hydrogenation of hydrocarbons via SC-H2O was investigated by isotope labeling technique.
- SC-H2O elucidated as significant hydrogen donor in cracking of vacuum residue.
- Dry pyrolysis was compared with the cracking in SC-H2O at high temperature and pressure.