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Featured researches published by Y. Zhuo.


Fuel | 1998

Internal consistency of coal gasification reactivities determined in bench-scale reactors: effect of pyrolysis conditions on char reactivities under high-pressure CO2

A. Megaritis; R.C Messenböck; Anne-Gaëlle Collot; Y. Zhuo; D. R. Dugwell; R. Kandiyoti

Abstract Relationships between char preparation conditions and CO 2 -gasification conversions have been examined using a wire-mesh, a fluidised-bed and a ‘hot-rod’ (fixed-bed) reactor. Conversions from the direct gasification of untreated coal have been compared with those from the gasification of chars prepared: (i) in-situ under helium in each reactor, before switching over to CO 2 ; and (ii) from gasification in all three reactors of a char sample, pre-prepared in the fixed bed reactor. Conversions from direct gasification were slightly higher than experiments where samples were first pyrolysed in situ and gasified under CO 2 in the same reactor. In some cases, conversions were within experimental error. Under these conditions and within several percentage points, the pyrolysis and gasification steps may be considered as additive. Lower overall conversions observed in the hot-rod reactor have been attributed to the combined effect of: (i) formation of a low reactivity char—owing to tar-solids contact leading to secondary char deposition; and (ii) poor contact between char and the reactive gas. In the wire-mesh and the fluidised-bed reactors, direct CO 2 -gasification conversions were considerably larger than those determined using the common sample of char, pre-prepared in the hot-rod (fixed-bed) reactor. This sharp drop in overall conversion shows that care must be taken in interpreting reactivity data from ‘two-reactor, two-step’ procedures where char preparation conditions are not identical to those of the gasification step. A broadly linear relationship has been observed between conversions from a pilot plant reactor and direct CO 2 -gasification in the bench-scale high-pressure wire-mesh reactor. Despite differences between operating parameters in the two reactors, the results suggest that data from the wire-mesh reactor may be successfully used to compare relative coal reactivities under pilot-plant gasification conditions.


Fuel | 1999

Co-pyrolysis and co-gasification of coal and biomass in bench-scale fixed-bed and fluidised bed reactors

Anne-Gaëlle Collot; Y. Zhuo; D. R. Dugwell; R. Kandiyoti


Fuel | 2002

Factors governing reactivity in low temperature coal gasification. Part II. An attempt to correlate conversions with inorganic and mineral constituents

L Lemaignen; Y. Zhuo; G. P. Reed; D. R. Dugwell; R. Kandiyoti


Energy & Fuels | 2005

Trace Element Distribution in Sewage Sludge Gasification: Source and Temperature Effects

G. P. Reed; N. Paterson; Y. Zhuo; D. R. Dugwell; R. Kandiyoti


Fuel | 2000

Conversion of coal particles in pyrolysis and gasification: comparison of conversions in a pilot-scale gasifier and bench-scale test equipment☆

Y. Zhuo; R.C Messenböck; Anne-Gaëlle Collot; A. Megaritis; N.P Paterson; D. R. Dugwell; R. Kandiyoti


Energy & Fuels | 2008

Development of a Bench-Scale High-Pressure Fluidized Bed Reactor and Its Sequential Modification for Studying Diverse Aspects of Pyrolysis and Gasification of Coal and Biomass

A. Cousins; Y. Zhuo; Anthe George; N. Paterson; D. R. Dugwell; R. Kandiyoti


Energy & Fuels | 2005

Formation of Hydrogen Cyanide and Ammonia during the Gasification of Sewage Sludge and Bituminous Coal

N. Paterson; Y. Zhuo; D. R. Dugwell; R. Kandiyoti


Energy & Fuels | 1998

Pyrolysis and Gasification in a Bench-Scale High-Pressure Fluidized-Bed Reactor

A. Megaritis; Y. Zhuo; R. Messenböck; D. R. Dugwell; R. Kandiyoti


Energy & Fuels | 2000

An attempt to correlate conversions in pyrolysis and gasification with FT-IR spectra of coals

Y. Zhuo; L. Lemaignen; I.N. Chatzakis; G. P. Reed; and D. R. Dugwell; R. Kandiyoti


Energy & Fuels | 2002

Investigation of Ammonia Formation during Gasification in an Air Blown Spouted Bed: The Effect of the Operating Conditions on Ammonia Formation and the Identification of Ways of Minimizing Its Formation

Y. Zhuo; N. Paterson; B. Avid; D. R. Dugwell; R. Kandiyoti

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R. Kandiyoti

Imperial College London

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N. Paterson

Imperial College London

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