rice straw (#2802)

ID-number#2802
Materialrice straw
Classification ECN Phyllis classification ▸ straw (stalk/cob/ear) ▸ rice ▸ rice straw
NTA 8003 classification ▸ [200] biomassa uit land- en tuinbouw ▸ [220] stro ▸ [224] rijsthalm
Ash typeAsh content determined at 525°C, ash composition after heating to 950°C (resulting in 7.97% loss)
Submitter organisationECN (Netherlands)
Submission date2006-07-11
Remarks525°C ash contains 0.22% CO2, 0.67% SO2 and 3.18% Cl. 950°C ash contains 0.29% MnO too
LiteratureP. Thy, B.M. Jenkins, C.E. Lesher, S.Grundvig: Compositional constraints on slag formation and potassium volatilization from rice straw blended wood fuel. Fuel Processing Technology 87 (2006) 383-408

Values

Property Unit Value Std dev Det lim Lab Date Method Remarks
ar dry daf

Fuel Properties

Proximate Analysis

Moisture content wt% 7.50
Ash content wt% 20.44 22.10

Ultimate Analysis

Carbon wt% 38.50 41.62 53.43 Measured
Hydrogen wt% 3.56 3.85 4.94 Measured
Nitrogen wt% 0.55 0.59 0.76 Measured
Sulphur wt% 0.06 0.06 0.08 Measured
Oxygen wt% 36.30 39.24 50.38 Measured
Total (with halides) wt% 107.49 108.10 110.40 Calculated

Calorific Values

HHVMilne MJ/kg 13.17 14.24 18.28 Calculated

Chemical Analyses

Halides

Chlorine (Cl) mg/kg 5 800.0 6 270.3 8 049.1 Measured

Physical Properties

Ash melting behaviour

American standard method, measured in oxidizing conditions

IDT (initial deformation temperature) °C 1 240
SOT (softening or spherical temperature) °C 1 378
HT (hemispherical temperature) °C 1 429
FT (fluid temperature) °C 1 470

American standard method, measured in reducing conditions

IDT (initial deformation temperature) °C 1 175
SOT (softening or spherical temperature) °C 1 367
HT (hemispherical temperature) °C 1 406
FT (fluid temperature) °C 1 420

Ash Properties

Ash composition

P2O5 wt% (ash) 0.66
SiO2 wt% (ash) 82.13
Fe2O3 wt% (ash) 0.11
Al2O3 wt% (ash) 0.10
CaO wt% (ash) 1.74
MgO wt% (ash) 1.79
Na2O wt% (ash) 0.15
K2O wt% (ash) 13.02
TiO2 wt% (ash) 0.01